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AERIS RESOURCES LIMITED Capital/Financing Update 2016

Aug 2, 2016

64347_rns_2016-08-02_0a25a850-7526-4fa5-bba3-0b65481f925d.pdf

Capital/Financing Update

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3 AUGUST 2016

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ASX/MEDIA RELEASE

AERIS RESOURCES LIMITED (ASX: AIS)

UPDATED ORE RESERVE ESTIMATE FOR THE TRITTON DEPOSIT – CONTAINED COPPER INCREASES BY 32%

Aeris Resources Limited (ASX: AIS) (Aeris or Company) is pleased to announce an update of the Mineral Resource and Ore Reserve Estimates, as at 30 June 2016, for its Tritton deposit at the Company’s Tritton Copper Operations in New South Wales.

The updated Proved and Probable Ore Reserve Estimates for the Tritton deposit is 6.4Mt at 1.6% copper for 100k tonne of contained copper metal. This represents a 32% increase, (by contained metal), on the previous public reported Ore Reserve estimate (as at 30 June 2015) of 4.4Mt at 1.7% coper for 76k tonne of contained copper and is after depletion by mining in the year of 28k tonne contained copper metal.

The increase results from a resource drilling program completed in early 2016 that extended knowledge of the Tritton deposit to approximately 1,250 below surface. An update of the Mineral Resource estimate has also been completed, based on this drilling program. The Tritton deposit remains open at depth and further resource drilling is planned for the future when suitable underground drill locations become available.

Aeris’ Executive Chairman, Andre Labuschagne said “The updated Mineral Resource and Ore Reserve estimates for the Tritton deposit underpin an extension of the mine life at the Tritton Operations to 2023.”

The revised estimates for these deposits are reported in accordance with the JORC Code 2012 standards. The supporting JORC Code 2012 documentation for the updated Mineral Resource and Ore Reserve estimate is attached to this release and posted on the company’s web site.

ENDS

For further information, please contact: Mr. Andre Labuschagne Executive Chairman Tel: +61 7 3034 6200, or visit our website at www.aerisresources.com.au

Media:

Michael Cairnduff Cannings Purple Tel: 0406 775 241 [email protected]

About Aeris

Aeris Resources Limited (ASX: AIS) is an established, top 10 independent Australian copper producer and explorer.

The Company’s core asset is its Tritton operations in New South Wales, which produced 30,425 tonnes of copper in FY2016. The existing operations incorporate multiple mines and a 1.8 million tonne per annum processing plant.

Aeris also has an exciting portfolio of highly prospective near mine and regional exploration projects creating a pipeline for future growth and a clear opportunity to leverage the Company’s established infrastructure at Tritton.

Aeris has a highly experienced Board and management team, and is actively reviewing suitable merger and acquisition opportunities.

MINERAL RESOURCE ESTIMATE

RESULTS

The Mineral Resource estimate reference date is 30[th] June 2016. The Tritton deposit has been mined and the Mineral Resource depleted since the previous public report.

Table 1 Classified Mineral Resource for the Tritton deposit as at 30th June 2016

Resource Category Tonne(kt) Copper(%) Contained Copper(kt)
Measured 3,850 1.9 73
Indicated 5,430 1.4 73
Total M&I 9,270 1.6 146
Inferred 1,960 1.2 24
Total 11,240 1.5 169
  1. Mineral Resources are quoted as INCLUSIVE of Ore Reserve.

  2. Mineral Resource is reported at a 0.6% Cu cutoff grade.

  3. Discrepancy in summation may occur due to rounding.

  4. Estimate is constrained by the survey stope and development positions for Tritton as at end June 2016.

  5. Indicated estimate includes 490k tonne at 2.6% Cu for 12.7 k tonne of copper metal contained in the upper Tritton Pillars between the 4655m RL and 4565m RL that have been down-graded from Measured Resource due to risk.

CHANGE FROM PREVIOUS PUBLIC REPORT

Material changes to the Tritton Mineral Resource from the previous reporting period include mine depletion, additional drilling data resulting in spatial changes to the mineralised system and a revised geological interpretation. Mine production in the period reported between each model from June 2015 to June 2016 was 1,412 thousand tonne at 2.0% copper for 27.6 thousand tonne contained copper. This production depleted the Mineral Resource. Net depletion of the Mineral Resource is different from mine production due to the combined impact of dilution and ore loss during mining as well as variation between estimated and actual Mineral Resource.

The updated resource model has changed noticeably in comparison to the previously reported Mineral Resource which was created in 2012. The differences relate to an increase in drill density and spatial changes to the mineralised system through the previous Indicated and Inferred regions. Additions to the mineralised system are associated with the increased thickness and geometry changes at depth below 4200mRL and extensions to the known mineralised system below 4000mRL.

Table 2 Change in the reported Tritton Mineral Resource since previous public report

Estimate Resource Category Tonne(kt) Copper(%) Contained Copper(kt)
June 2016 Measured 3,850 1.9 73
Indicated 5,430 1.4 73
Total M&I 9,270 1.6 146
Inferred 1,960 1.2 24
Total 11,240 1.5 169
June 2015 Measured 2,750 2.1 59
Indicated 4,620 1.7 79
Total M&I 7,380 1.9 138
Inferred 3,140 1.4 45
Total 10,520 1.7 182
difference Measured 1,100 ‐0.2 14
Indicated 810 ‐0.4 ‐6
Total M&I 1,890 ‐0.3 8
Inferred ‐1,180 ‐0.2 ‐21
Total 720 ‐0.2 ‐13

ORE RESERVE ESTIMATE

RESULTS

The Tritton mine Ore Reserve Estimate as at 30[th] June 2016 is reported in Table 3 . It is reported according to JORC 2012.

Table 3 Ore Reserve Estimate for Tritton deposit as at 30 June 2016

Category Tonne (k tonne) Copper % Contained Copper
(k tonne)
Proved
Probable
Total
3,580
2,790
1.7
1.4
61
39
6,370 1.6 100
  1. Ore Reserves are reported as INCLUSIVE of the supporting Mineral Resource estimate. 2. Discrepancies in summation will occur due to rounding.

CHANGES FROM PREVIOUS ESTIMATE

The Ore Reserve estimate presented in this report is an update that accounts for changes to the Mineral Resource estimate including depletion due to mining in the year since last report. An increase in the Mineral Resource, net of depletion, resulted from a resource drilling program and subsequent geology modelling of the deposit. Measured and Indicated Mineral Resource has been extended to 4000mRL.

The Ore Reserve has been extended to the depth of 4050mRL consistent with the extension of the Indicated Mineral Resource to 4000mRL.

All of the Measured and Indicated Mineral Resource has been assessed for inclusion in the Ore Reserve. All resource that can be converted has been reported as Ore Reserve. Conversion rates of resource to reserve are 80% for that material above 4080mRL and 5% for that material below 4080mRL, (this level is the last of sublevels where high rates of conversion is possible with current mining methods).

Modifying factors applied for dilution and ore loss have been slightly altered from the prior estimate where the estimate now includes some larger stopes. The modifying factors are selected following review of production reconciliation against the Ore Reserve estimate. The reconciliation indicates that the Ore Reserve estimate is within 2% of the actual ore processed for the stopes mined in the year 2015.

The previous Ore Reserve estimate was made as at June 30[th] 2015.

Table 4 Change in Ore Reserve from previous estimate

Estimate Category Tonne
(k tonne)
Copper % Contained Copper
(k tonne)
June 2016 Proved
Probable
Total
3,580
2,790
1.7
1.4
61
39
6,370 1.6 100
June 2015 Proved
Probable
**Total **
2,359
2,040
1.8
1.7
42
34
4,399 1.7 76
Difference Proved
Probable
Total
+1220 -0.1 +19
+750 -0.3 +5
+1970 -0.1 +24

Mr Cox confirms that he is the Competent Person for all the Mineral Resources estimates summarised in this Report and he has read and understood the requirements of the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code, 2012 Edition). Mr Cox is a Competent Person as defined by the JORC Code, 2012 Edition, having relevant experience to the style of mineralisation and type of deposit described in the Report and to the activity for which he is accepting responsibility. Mr Cox is a Member of the Australasian Institute of Mining and Metallurgy (MAusIMM No. 220544). Mr Cox has reviewed the Report to which this Consent Statement applies. Mr Cox is a full time employee of Aeris Resources Limited.

Mr Ian Sheppard, confirms that he is the Competent Person for all the Ore Reserves estimates summarised in this Report and Mr Sheppard has read and understood the requirements of the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code, 2012 Edition). Mr Sheppard is a Competent Person as defined by the JORC Code, 2012 Edition, having five years’ experience that is relevant to the style of mineralisation and type of deposit described in the Report and to the activity for which he is accepting responsibility. Mr Sheppard is a Member of The Australasian Institute of Mining and Metallurgy, No. 105998. Mr Sheppard has reviewed the Report to which this Consent Statement applies. Mr Sheppard is a full time employee of Aeris Resources Limited.

Mr Sheppard has disclosed to the reporting company the full nature of the relationship between himself and the company, including any issue that could be perceived by investors as a conflict of interest. Specifically Mr Sheppard holds 22,418,546 options to subscribe for shares in in Aeris Resources Limited. These options are subject to various vesting conditions as described in the Notice of General Meeting dated 13 November 2015. These vesting conditions have not been met at this time.

Mr Sheppard verifies that the Ore Reserve sections of this Report is based on and fairly and accurately reflects in the form and context in which it appears, the information in his supporting documentation relating to Ore Reserves.

THE FOLLOWING SECTIONS ARE PROVIDED FOR COMPLIANCE WITH REQUIREMENTS FOR THE REPORTING OF EXPLORATION RESULTS UNDER THE JORC CODE, 2012 EDITION.

JORC CODE, 2012 EDITION – TABLE 1 REPORT: TRITTON MINERAL RESOURCE

Section 1 Sampling Techniques and Data

(Criteria in this section apply to all succeeding sections.)

  • Criteria JORC Code explanation Commentary Sampling 1. Nature and quality of sampling (e.g. cut techniques channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc.). These examples should not be taken as limiting the broad meaning of sampling.

    1. All Diamond core samples are based on ½ core. Pre-collar RC samples in waste zones taken as 4 metre composites and re-spit to 1 metre samples when return assays or geology indicate copper or gold mineralisation. Underground samples are collected from drive headings or cross cuts at 1 metre intervals or at geological breaks. Underground samples are collected as rock chips.

    2. All diamond core is aligned, measured and metre marked. All underground face samples are digitally photographed with face positions measured from survey control points and survey pickups. Underground cross cuts are not digitally photographed however their positions are referenced from survey control points.

2. Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used.

  1. During all drill programs at the Tritton deposit Aeris Resources Limited have ensured drill contractors completing the works maintain a high industry standard. Diamond drill sample lengths are generally taken at 1.0 metre intervals. At geological boundaries (based on mineralisation textural differences or material changes in chalcopyrite content) the sample length can vary between a minimum of 0.5 metres and maximum of 1.4 metres. Sampling is extended 10m beyond the mineralised system. Exploration and resource definition diamond core drilled from surface which intersected the mineralised Tritton deposit pre 2010 are predominantly NQ2 in size. Resource definition holes drilled during 2010 to 2012 (targeting 4300mRL to 4000mRL) are HQ3 in size while resource definition holes drilled from 2014 onwards (4200mRL to 3900mRL) are NQ2 in size. Underground grade control holes are NQ2 for down holes and LTK60 for up holes. Underground face samples (rock chip) are also collected for grade estimation with ore drives mapped and ore boundaries picked up by survey. All Exploration holes sampled by Aeris Resources Limited for the Tritton Mineral Resource are analysed by a 35 element three stage Aqua Regia digestion with an ICP finish (ME-ICP41) suitable for Cu concentrations between 1 ppm to 10,000 ppm. All Cu samples greater than or equal to 1.0% Cu were re-submitted for an ore digest to determine Cu concentrations greater than 1.0% (ME-OG46).

3. Aspects of the determination of mineralisation that are Material to the Public Report.

4. In cases where ‘industry standard’ work has been done this would be relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information.

Criteria JORC Code explanation Commentary
Au assays were completed via fire assay fusion with an AAS finish using a
30g charge (Au-AA22) suitable for Au grade ranges between 0.01 g/t – 100
g/t. All Au samples greater than or equal to 1.0 g/t Au were re-submitted for
an ore grade 30g fire assay charge to determine Au concentrations greater
than 1.0 g/t Au (Au-AA25). All grade control diamond drill holes and
underground samples are assayed using the ore grade digest method (ME-
OG46) for Cu, Fe, Ag, Zn, Pb and S. Au assays are completed via Au-AA25.
Sample preparation and assaying are completed at the ALS laboratory in
Orange N.S.W.
Drilling 1. Drill type (e.g. core, reverse circulation, open- 1. All drilling data intersecting the Tritton mineralised system was completed via
techniques hole hammer, rotary air blast, auger, Bangka, diamond drilling. A small number of RC drill holes were completed early in
sonic, etc.) and details (e.g. core diameter, triple the exploration phase pre 2000. These drill holes targeted up upper portions
or standard tube, depth of diamond tails, face- of the mineralised system which has subsequently been mined. Diamond
sampling bit or other type, whether core is hole diameter sizes vary from HQ3 and NQ2 for resource definition
oriented and if so, by what method, etc.). programs. Grade control hole diameter sizes are NQ2 for down holes and
LTK60 for up holes. All underground samples are rock chip samples.
Drill sample 1. Method of recording and assessing core and 1. All diamond core recoveries are measured and recorded by Aeris Resources
recovery chip sample recoveries and results assessed. Limited field technicians or geologists. Initial drill holes completed by NORD
2. Measures taken to maximise sample recovery
and ensure representative nature of the samples.
targeting the Tritton deposit did not have RQD routinely recorded (BDS006 to
BDS125). RC pre-collar sample recoveries were not recorded nor required to
be recorded as all material estimated for the Tritton mineralisation is defined
3. Whether a relationship exists between sample by diamond drill core. RQD measurements are taken on all core prior to all
recovery and grade and whether sample bias sampling. This procedure has been part of the standard drill core processing
may have occurred due to preferential loss/gain procedure since 2005.
of fine/coarse material. 2. Rock competency is very good through the Tritton mineralised system and
adjoining country rock. Faults intersected are generally sub metre in
thickness and contain minor amounts of clay/fine susceptible to core loss.
Industry standard drilling practices are maintained to ensure sample
recoveries and core presentation remains at a high level.
3. No significant relationship appears to exist between recovery and grade.
Logging 1. Whether core and chip samples have been 1. All diamond core and RC chips are geologically logged by company
geologically and geotechnically logged to a level geologists. All surface holes drilled by Aeris Resources Limited are
of detail to support appropriate Mineral Resource geotechnically logged. All logging is to the level of detail to support the Tritton
estimation, mining studies and metallurgical style of mineralisation (VMS Besshi style).
studies.
Criteria JORC Code explanation Commentary
2. Whether logging is qualitative or quantitative in 2. Logging of diamond core and RC samples record lithology, alteration,
nature.
Core
(or
costean,
channel,
etc.)
mineralisation, degree of oxidation, structure, RQD and recovery. All
photography. exploration core was photographed in both dry and wet form. Underground
3. The total length and percentage of the relevant resource definition and grade control holes are photo in wet form only. All RC
intersections logged. intervals are stored in plastic chip trays, labelled with intervals and hole
number. Core is stored in core trays and labelled similarly. Underground
headings which have been sampled are spatially referenced using survey
control points. Underground headings which are sampled have a digital
photography taken.
3. All RC and core samples were logged in full. Underground samples are
logged for lithology and structure.
Sub- 1. If core, whether cut or sawn and whether quarter, 1. Diamond core samples are cut using an Almonte automatic core saw. Half
sampling half or all core taken. core samples are collected on average at 1.0 m intervals and can vary
techniques
and sample
preparation
2. If non-core, whether riffled, tube sampled, rotary
split, etc. and whether sampled wet or dry.
3. For all sample types, the nature, quality and
appropriateness of the sample preparation
technique.
between 0.5 metres to 1.4 metres. Sample intervals not equal to 1.0 metre
generally occur at mineralisation/geology contacts.
2. RC samples for waste sections are collected at 1 metre intervals, with a 1m
split and bulk residual collected on the drill rig. The bulk residual was
composited to 4 metre intervals by spear sampling. If RC composites
returned above background copper or gold values, the stored original 1m split
4. Quality control procedures adopted for all sub- was sent to the laboratory for analysis.
sampling stages to maximise representivity of
samples.
3. Samples taken are appropriate for the Tritton mineralisation style (Copper
VMS). Half core drill core samples are sent to ALS laboratory in Orange for
5. Measures taken to ensure that the sampling is sample preparation and assaying. Upon arrival at the laboratory sample
representative of the in situ material collected, weights are recorded. Samples greater than 3kg are crushed via a Boyd
including
for
instance
results
for
field
crusher (90% passing 2mm) and rotary split to a sub sample between 2kg to
duplicate/second-half sampling. 3kg. The sub sample is pulverised via a LM5 to 85% passing 75µm. A 300g
6. Whether sample sizes are appropriate to the
grain size of the material being sampled.
sample is taken from the pulverised material for assaying. Samples less
thank 3kg are crushed via a jaw crusher to 70% passing 6mm and the whole
sample is pulverised in a LM5 with a 300g sub sample taken for assaying.
Underground face samples are treated in the same manner as diamond core
described above.
4. Sample blanks and industry standards are routinely submitted at a frequency
of 1:20. Duplicates and Pulps are retained and re-submitted periodically to
test assay reproducibility.
Criteria JORC Code explanation Commentary
5. Field duplicates from grade control holes are conducted routinely.
Regression analysis of the field duplicates shows very good correlation. The
understanding of sample representativeness and grade estimation is also
reviewed through mine to mill reconciliations and stope reconciliations and
closing reports. All core samples are visually examined against assay values
and logged mineralisation.
6. The sample sizes are considered appropriate to the grain size of the material
being sampled.
Quality of 1. The nature, quality and appropriateness of the 1. Mineralisation at the Tritton deposit is associated with primary sulphides.
assay data assaying and laboratory procedures used and Copper mineralisation is primarily associated with chalcopyrite. Copper
and whether the technique is considered partial or mineralisation is largely interpreted to be remobilised and varies in nature
laboratory total. from fine disseminated spots to zones of erratic +10cm scale stockwork
tests 2. For geophysical tools, spectrometers, handheld
XRF instruments, etc., the parameters used in
determining the analysis including instrument
make and model, reading times, calibrations
textures. The assay methods described previously are considered
appropriate for the style of mineralisation. Sample preparation methods are
also considered appropriate for the style of mineralisation. Review of sample
duplicates indicates the assay repeatability is very good.
factors applied and their derivation, etc. 2. Information regarding assay techniques used for samples taken pre 2005
3. Nature of quality control procedures adopted
(e.g. standards, blanks, duplicates, external
laboratory checks) and whether acceptable
levels of accuracy (i.e. lack of bias) and precision
cannot be confirmed. However, drill holes completed up to this period are
associated with mineralised zones which have already been mined. Aeris
Resources Limited are confident the assay methods used would meet
industry standards based on the geological protocols in place at the time.
have been established. 3. No other methods were used to derive assay values for resource estimation.
4. Laboratory QA/QC samples included the use of blanks, duplicates, standards
(commercial certified reference materials) and repeats.
Verification 1. The verification of significant intersections by 1. Significant mineralised intersections are reviewed by the logging geologist.
of sampling either independent or alternative company QAQC results are reviewed on a batch by batch and monthly basis.
and personnel. Deviations from precision tolerances are investigated on a batch by batch
assaying 2. The use of twinned holes. basis. If grade bias is observed then follow up with the laboratory typically
occurs on a monthly basis.
3. Documentation of primary data, data entry
procedures, data verification, data storage
2. No twinned holes were conducted.
(physical and electronic) protocols.
4. Discuss any adjustment to assay data.
Criteria JORC Code explanation Commentary
3. All Aeris Resources Limited geological data is logged directly to a Panasonic
tough book laptop at the core yard using company logging codes. Data is
logged directly to Acquire (off line) which is then uploaded to the Acquire
network database once the computer is docked to the office workstation. In
built Acquire validation occurs at the time of data entry. Assay results are
returned electronically on a batch by batch basis from the ALS laboratory via
the webtrieve portal. Returned assay batches are reviewed prior to upload to
the Acquire database. If a batch fails QAQC procedures then follow up and
potential reassaying from the laboratory is required. Assay data are not
uploaded to the Acquire database until a batch passes all QAQC tests.
4. No adjustments to assay data are made.
Location of 1. Accuracy and quality of surveys used to locate 1. All surface drill holes completed from 2005 onwards have collar locations
data points drill holes (collar and down-hole surveys), surveyed by using a DGPS by either a contractor or staff surveyor. All pre
trenches, mine workings and other locations 2005 drill holes were surveyed by either staff surveyor(s) or contractors using
used in Mineral Resource estimation. a theodolite. All underground drill hole collars are surveyed by company
2. Specification of the grid system used. surveyors or contractors using a theodolite. Surveys are entered into the
Aeris Resources Limited corporate Acquire database. Underground samples
3. Quality and adequacy of topographic control. are located spatially against survey stations which are installed by either staff
or contract surveyors.
2. Geology interpretations and grade estimates are based on a local Tritton
Mine Grid (TMG). The TMG is rotated 8.423⁰to the west from AGD 66 true
north.
3. Quality and accuracy of the drill collars are suitable for geological
interpretation and resource estimation. A majority of drill holes intersecting
the current Mineral Resources are from underground drill holes.
Data spacing 1. Data spacing for reporting of Exploration Results. 1. Drill spacing across the Tritton deposit vary from approximately 80m (N) x
and
distribution
2. Whether the data spacing and distribution is
sufficient to establish the degree of geological
40m (RL) to 20m (N) x 20m (RL).
2. As a general rule Measured Mineral Resource is defined from a 20m x 20m
and grade continuity appropriate for the Mineral drill spacing. Indicated Mineral Resource is defined from a 40m x 40m drill
Resource
and
Ore
Reserve
estimation
spacing. Inferred Mineral Resource is defined from drill spacings up to 100m
procedure(s) and classifications applied. x 100m. Based on the observed geological continuity from underground
3. Whether sample compositing has been applied. develop and drill holes the drill spacing is appropriate.
3. The Tritton mineralisation is defined sufficiently to define both geology and
grade continuity for a Mineral Resource estimation and Ore Reserve
evaluation. The material defined as Measured is suitable for detailed stope
design.
Criteria Criteria JORC Code explanation Commentary
4. Samples are composited to 1.0 metre intervals. A majority of the assay data
are 1.0 metres in length. Within an estimation domain composite lengths are
created at 1.0 metre intervals from HW to FW. In some instances, the FW
sample may be less than 1.0 metre in length. Samples greater than or equal
to 0.5 metres are retained for estimation and those less than 0.5 metres are
not used for estimation.
Orientation 1. Whether the orientation of sampling achieves 1. Underground drill holes are collared from dedicated HW drill drives. In some
of data in unbiased sampling of possible structures and the instances, drill holes intersecting mineralisation perpendicular to geology.
relation to extent to which this is known, considering the This is more noticeable on the periphery of the deposit and for holes which
geological deposit type. intersect the deposit down dip at oblique angles. This is not considered to
structure 2. If the relationship between the drilling orientation
and the orientation of key mineralised structures
is considered to have introduced a sampling
bias, this should be assessed and reported if
material.
represent a material issue for Measured and Indicated Mineral Resource.
There are a small number of holes intersecting mineralisation below the
4000mRL level which cross cut the deposit at an acute angle. Underground
samples taken from development headings do not extend across the entire
estimation domain. There is potential for a small amount of bias to occur,
however it should be noted that there is only a small number of faces
sampled per level and the amount of diamond drill data would minimise any
potential grade bias.
2. No material issues due to sampling bias have been identified. Based on
mine to mill reconciliations over the course of mining activities the Tritton
resource estimate reconciles within tolerance levels.
Sample 1. The measures taken to ensure sample security. 1. Chain of Custody is managed by the Company. Samples are stored on site in
security polyweave bags containing approximately 5 samples. These bags are
securely tied, then loaded and wrapped onto a pallet for dispatch to the
laboratory. The samples are freighted directly to the laboratory with
appropriate documentation listing sample numbers and analytical methods
requested. Samples are immediately receipted by a laboratory staff member
on arrival, with a notification to Aeris Resources Limited of the number of
samples that have arrived.
Audits or 1. The results of any audits or reviews of sampling 1. External reviews and audits have been conducted by AMC, Optiro and HDR
reviews techniques and data. between 2010 to 2015. No fatal flaws or significant issues were identified.

Section 3 Estimation and Reporting of Mineral Resources

(Criteria listed in section 1, and where relevant in section 2 (not used for Tritton), also apply to this section.)

Criteria **JORC Code explanation ** Commentary
Database 1. Measures taken to ensure that data has not been 1. All assay results are logged against unique sample numbers. A sampling
integrity corrupted by, for example, transcription or keying sheet detailing sample numbers and core / RC intervals is completed prior
errors, between its initial collection and its use for to sample collection. During the sampling process each sample interval is
Mineral Resource estimation purposes. cross-referenced to the sample number and checked off against the
2. Data validation procedures used. sampling sheet. Pre-numbered bags are used to minimize errors. Assay
data is received via email in a common electronic format and verified
against the AcQuire database.
2. Data validation and QAQC procedures are completed by staff geologists.
Geology logs are validated by the core logging geologist. Assay data is not
uploaded to the corporate Acquire database until all QAQC procedures
have been satisfied.
Site visits 1. Comment on any site visits undertaken by the 1. Brad Cox (Aeris Resources Limited – Geology Manager) has made
Competent Person and the outcome of those numerous site visits during the latest resource definition drill program from
visits. 2014 onward.
2. If no site visits have been undertaken indicate
why this is the case.
Geological 1. Confidence in (or conversely, the uncertainty of) 1. The confidence in the Tritton geology model is high. The deposit has been
interpretation the geological interpretation of the mineral mined for over 10 years. During this period a significant amount of
deposit. geological data has been collected from drill core and underground
2. Nature of the data used and of any assumptions
made.
mapping. This information has been used to create the geology models
which as each level is developed are showing good correlation between
interpreted domain boundaries and their actual location (< 5 metres
3. The effect, if any, of alternative interpretations on difference).
Mineral Resource estimation. 2. Data used for the geological interpretation includes drill hole data (diamond
4. The use of geology in guiding and controlling core) and underground mapping. There are not significant assumptions
Mineral Resource estimation. made other than the mineralised system extends between drill holes along
5. The factors affecting continuity both of grade and
geology.
the interpreted orientation. The geology is relatively simple with minimal
structural deformation. Mineralisation is easily visible from the host
turbidite sequences. The geometry of the mineralised system is well
understood at drill spacings up to 40m x 40m.
Criteria **JORC Code explanation ** Commentary
3. For the updated Mineral Resource estimate two different geological
interpretations were trialled. The alternative interpretation domained out 2
high grade (+2% Cu) lodes below 4100mRL. Their orientation is oblique to
the dominate trend of the sulphide system. The alterative model was used
to understand the grade/metal differences between each interpretation.
There was no material difference between the estimates. The high grade
domains were discarded from the final estimate with Cu estimated within a
lower grade 0.4% Cu shell.
4. Estimation domains used for the latest resource estimate are based on
interpreted geology defined from drill core and underground mapping. Cu
estimates are constrained within a broad low grade 0.4% Cu shell based
on log probability distribution. Internally within this domain unmineralised
turbidite sequences are domained out and a massive high pyrite unit along
the HW is also modelled separately. A significant sub horizontal fault at
~4050mRL is also modelled and may affect Cu grades either side. Given
the stratiform nature of mineralisation variogram continuity is orientated
down the plane of the sulphide horizon. Within the plane the direction of
maximum continuity is steeply plunging to the south. Structural
measurements from orientated drill core have assisted with determining the
orientation of ore boundaries in areas of sparse drilling below 4000mRL.
5. Mineralisation is still open at depth below the 3860mRL (> 1,400 metres
below surface). Although there is not a significant amount of information
the geology (stratigraphy and ore textures) is similar in this region. From
4300mRL down the orientation of mineralisation changes from a NNE trend
to a E-W trend. Within this zone mineralisation changes from two distinct
mineralised systems, divided by a small unmineralised sequence, to a
broad lower grade thicker zone of mineralisation. The change in
orientation is not fully understood, however the geometry change is well
understood.
Dimensions 1. The extent and variability of the Mineral 1. The main Tritton mineralised zone is tabular in nature with an overall down
Resource expressed as length (along strike or dip length of 1.5km with mineralisation still open at depth. Mineralisation
otherwise), plan width, and depth below surface begins at approximately 155m below surface (5115mRL). The main body
to the upper and lower limits of the Mineral varies in thickness averaging 6-8 metres above the main “roll over” at
Resource. 4500mRL. Below the “roll over” the mineralised sulphide package thickens
with true widths in the order of 15 to 30 metres to 4300mRL. Below this
the mineralised body dips at a shallower angle (25⁰) and thickens to 70m
thick down to the 4000mRL. The geological understanding below this RL
is limited based on a small drill hole dataset and the dimensions of
mineralisationareinferred. The strikelengthofthemineralised system is
Criteria **JORC Code explanation ** Commentary
typically in excess of 300m (5000mRL to 4300mRL). Below this the strike
length reduces to approximately 100 to 150 metres. An along strike
extension of the Tritton deposit (South Wing) is located on the southern
extremities of the central Tritton resource. The south wing is broadly
triangular in shape with the long axis down dip with a length of 900 metres
with a width at the widest point of 250 metres. The thickness varies from 1
to 8 metres averaging 2 metres.
Estimation and 1. The nature and appropriateness of the estimation 1. Ordinary kriging was used to estimate all variables. Ordinary kriging is an
modelling technique(s) applied and key assumptions, appropriate for this style of mineralisation. Given that a majority of Cu is
techniques including treatment of extreme grade values, contained within one domain (0.4% Cu shell) there will be some grade
domaining,
interpolation
parameters
and
averaging occurring, particularly in areas with variable Cu grades. An
maximum distance of extrapolation from data indicator kriged estimate was trialled to determine whether some of this
points. If a computer assisted estimation method variability could be captured in the estimate. There was little difference
was chosen include a description of computer between the OK and IK estimates. The indicator variograms at cut-offs
software and parameters used. above the median have short ranges (≤10m) and is likely the reason the IK
2. The availability of check estimates, previous
estimates and/or mine production records and
whether the Mineral Resource estimate takes
appropriate account of such data.
estimate does not reflect a higher degree of variability. Vulcan software
was used to create 3D geology/estimation domain wireframes, generate
descriptive statistics and grade estimation. Isatis software was used to
report descriptive statistics and model variograms. Metal per composite
analysis and review of descriptive statistics were used to determine
3. The assumptions made regarding recovery of by- appropriate top cut values. For the Cu data no top cuts were applied.
products. Estimation was either performed in 2 passes or 3 depending on the search
4. Estimation of deleterious elements or other non-
grade variables of economic significance (e.g.
sulphur for acid mine drainage characterisation).
size and dimensions of the estimation domain. Estimation pass 1 was
generally set at 70% of the variogram range, estimation pass 2 set at 140%
of variogram range and estimation pass 3 was designed to populate all
remaining blocks within the estimation domain. A majority of Measured
5. In the case of block model interpolation, the and Indicated Mineral Resource classified blocks are associated with
block size in relation to the average sample estimation pass 1.
spacing and the search employed. 2. All estimates within each estimation domain are validated against
6. Any assumptions behind modelling of selective declustered composites. Mean grade estimates that fall within 5% of the
mining units. declustered composite mean grade are considered acceptable. If the
7. Any assumptions about correlation between
variables.
difference is outside a 5% tolerance, then the estimation and/or decluster
cell size is reviewed and changes made if necessary. The model is also
reconciled against previous models and mill reconciled data on 6 monthly
8. Description of how the geological interpretation increments. Estimates are within acceptable tolerance levels when
was used to control the resource estimates. compared against the reconciliation data.
9. Discussion of basis for using or not using grade 3. No assumptions have been made for the recovery of gold and silver by-
cutting or capping. products.
10. The process of validation, the checking process 4. Other variables estimated included S,Fe,Zn and bulk density. Sulphur
Criteria **JORC Code explanation ** Commentary
used, the comparison of model data to drill hole
estimates are used for the identification of PAF material.
data, and use of reconciliation data if available. 5. The parent block sized used for the updated estimate was 10m (E) x 10m
(N) x 4m (RL) with sub celling down to 1m (E) x 1m (N) x 1m (RL). The cell
size takes into consideration drill spacing (grade control 20m x 20m x 20m
and resource definition 40m x 40m x 40m) and grade variability in different
orientations.
6. No assumptions have been applied to the model for selective mining unit.
7. No correlation has been made between variables. Fusion
8. The distinction between background Cu and Cu associated with
mineralisation was defined from a combination of geology/textural logging
and population distributions associated with a log probability plot. From
this a 0.4% Cu cut-off was selected to define the bounding Cu estimation
domain. Geological domains were modelled and tested against each other
(geological interpretation, descriptive statistics, QQ plots and contact plots)
to determine whether they could be incorporated into one domain or
separated. This approach was used for each variable estimated.
Generally, domain boundaries were treated as hard domains whereby only
composite data associated with an estimation domain is used for
estimation. In some instances, based on contact plots, if a semi-soft profile
is identified across an estimation domain boundary then composites from
an adjoining estimation domain can be selected for estimation.
9. Each estimation domain for each variable was reviewed to determine
whether top cuts are required. Top cuts were applied based on metal per
composite analysis, histogram distributions and spatial location of
composite data. Top cuts were applied if too much metal was assigned to
particular composites (metal per composite) and/or clear disconnect from
histogram distribution and spatially where the anomalous composites occur
in relation to other samples.
10. All estimates within each estimation domain are validated against
declustered composites. Mean grade estimates that fall within 5% of the
declustered composite mean grade are considered acceptable. If the
difference is outside a 5% tolerance, then the estimation and/or decluster
cell size is reviewed and changes made if necessary. Estimates were also
validated visually in Vulcan displaying block estimates and composite data.
Swath plots on 20m levels were also created showing block estimates and
declustered composite data in the X, Y and Z directions for each variable
estimated.
Criteria **JORC Code explanation ** Commentary
Moisture 1. Whether the tonnages are estimated on a dry 1. Tonnages are estimated on a dry basis.
basis or with natural moisture, and the method of
determination of the moisture content.
Cut-off 1. The basis of the adopted cut-off grade(s) or 1. A 0.4% Cu cut-off was used for domaining mineralised Cu. The selection
parameters quality parameters applied. of an appropriate cut-off grade was based on geology (ore textures and
lithology) and log probability plot distributions. Previously a higher cut-off
was used (0.8% Cu) which reflected the higher grade more constrained
geometry of the mineralised system. The mineralised system below the
current mining front is becoming thicker with less pronounced higher grade
zones of mineralisation.
Mining factors
1. Assumptions made regarding possible mining
1. The only consideration to the mining method is the minimum interpretation
or assumptions methods, minimum mining dimensions and width applied is 2 metres downhole. Otherwise no other mining
internal (or, if applicable, external) mining assumptions have been applied to the Tritton model.
dilution. It is always necessary as part of the
process of determining reasonable prospects for
eventual
economic
extraction
to
consider
potential mining methods, but the assumptions
made regarding mining methods and parameters
when estimating Mineral Resources may not
always be rigorous. Where this is the case, this
should be reported with an explanation of the
basis of the mining assumptions made.
Metallurgical 1. The
basis
for
assumptions
or
predictions
1. The dominant Cu mineral within the Tritton deposit is chalcopyrite.
factors or
regarding metallurgical amenability. It is always
Material mined from Tritton is processed at the Tritton Copper Operations
assumptions necessary as part of the process of determining copper ore processing plant. Copper recovery to copper concentrate at a
reasonable prospects for eventual economic 24% copper in concentrate grade is on average 94.5%.
extraction to consider potential metallurgical
methods,
but
the
assumptions
regarding
metallurgical
treatment
processes
and
parameters
made
when
reporting
Mineral
Resources may not always be rigorous. Where
this is the case, this should be reported with an
explanation of the basis of the metallurgical
assumptions made.
Criteria **JORC Code explanation ** Commentary
Environmental 1. Assumptions made regarding possible waste and 1. Tailing waste from ore processing is disposed at the current tailings
factors or
process residue disposal options. It is always
storage facility within ML1544 (or utilised as paste fill). Waste from
assumptions necessary as part of the process of determining underground development is stored on site for future rehabilitation of the
reasonable prospects for eventual economic Tailing Storage Facility. Any potentially acid forming waste is used for
extraction to consider the potential environmental stope backfill underground. No significant environmental impacts have
impacts of the mining and processing operation. been identified from the Tritton mining operation.
While at this stage the determination of potential
environmental
impacts,
particularly
for
a
greenfields project, may not always be well
advanced, the status of early consideration of
these potential environmental impacts should be
reported. Where these aspects have not been
considered this should be reported with an
explanation of the environmental assumptions
made.
Bulk density 1. Whether assumed or determined. If assumed, the 1. Bulk density has been estimated via OK within all estimation domains. For
basis for the assumptions. If determined, the the background estimation domain outside of the mineralised system two
method used, whether wet or dry, the frequency estimation passes were run. For unestimated blocks outside of the 2
of the measurements, the nature, size and estimation passes a default value of 2.90 was applied (mean value from
representativeness of the samples. internal dilution estimation domain).
2. The bulk density for bulk material must have been 2. Bulk density values were measured using the Archimedes Principle
measured by methods that adequately account Method' (weight in air v's weight in water). Varying forms of silicification is
for void spaces (vugs, porosity, etc.), moisture present throughout the mineralised system and porosity associated with
and differences between rock and alteration the turbidite host sediments is negligible. Vugs have been noticed within
zones within the deposit. the drill core on rare occasions. Technically the bulk density determination
3. Discuss assumptions for bulk density estimates
used in the evaluation process of the different
materials.
method does not take into account for the presence of vugs. Given they
have only been observed on the rare occasion and are not correlatable to
specific zones they are not considered to represent a material problem with
current bulk density determinations.
3. Bulk density has been estimated from the bulk density measurements. For
material outside the mineralised domains an average density value for the
host material has been assigned based on the mean bulk density from the
internal dilution estimation domain.
  • Criteria JORC Code explanation Commentary Classification 1. The basis for the classification of the Mineral 1. Classification of the resource estimate has been guided by confidence in Resources into varying confidence categories. the geological interpretation, drill density, underground development. Measured classified areas were constrained to levels defined from grade

  • 2. Whether appropriate account has been taken of control drilling (drill spacing 20m x 20m x 20m). The Measured resource

  • all relevant factors (i.e. relative confidence in extends down to the 4170mRL level. Indicated classified areas were

  • tonnage/grade estimations, reliability of input constrained to 40m x 40m drill spacings below 4170mRL. The Indicated

  • data, confidence in continuity of geology and resource extends down to the 4000mRL level. The Inferred Mineral

  • metal values, quality, quantity and distribution of Resource incorporates the south wing estimation domain (located along

  • the data). strike and south of the main Tritton mineralised system) and down dip

  • 3. Whether the result appropriately reflects the extensions below the Indicated resource within the main Tritton mineralised Competent Person’s view of the deposit. system. Within the main mineralised system, the Inferred resource was extended down to the 3860mRL level which coincides with the deepest drill intersection.

    1. The drill and input data density is comprehensive in its coverage for this style of mineralisation and estimation techniques to allow reasonable confidence for the tonnage and grade distribution to the levels of Measured, Indicated and Inferred.
    1. The updated Tritton geology interpretation/model and resource estimate appropriately reflects the competent persons understanding of the geological and grade distributions. The classification of the resource in the area of the upper Tritton Pillars has been downgraded from Measured to Indicated due to concerns regards the continuity of this mineralisation around old and unfilled stopes.
  • Audits or 1. The results of any audits or reviews of Mineral 1. External reviews and audits have been conducted by AMC and Optiro for reviews Resource estimates. early generations of the Tritton resource models. No fatal flaws or

  • External reviews and audits have been conducted by AMC and Optiro for early generations of the Tritton resource models. No fatal flaws or significant issues with the past Tritton models were identified at the time. The current geological interpretation, estimation domain assumptions and grade estimates have been reviewed by HDR. No fatal flaws or significant issues were identified.

Criteria **JORC Code explanation ** Commentary
Discussion of 1. Where appropriate a statement of the relative 1. The models have been validated visually against drilling and statistically
relative accuracy and confidence level in the Mineral against input data sets on a domain and on swath plot basis. The relative
accuracy/ Resource estimate using an approach or accuracy of the Mineral Resource estimate is reflected in the reporting of
confidence procedure
deemed
appropriate
by
the
the Mineral Resource as per the guidelines of the 2012 JORC code. Over a
Competent Person. For example, the application 12 month period the Measured Mineral Resource should reconcile within
of statistical or geostatistical procedures to 5% of reported mill figures. This trend has been consistently observed our
quantify the relative accuracy of the resource previous 12 month periods.
within stated confidence limits, or, if such an
approach
is
not
deemed
appropriate,
a
2. The statement relates to local estimates of tonnes and grade above
qualitative discussion of the factors that could 4170mRL for Measured material. Below 4170mRL the estimate is treated
affect the relative accuracy and confidence of the as a global estimate for Indicated material. For the Indicated material grade
estimate. control drilling to nominal 20m x 20m drill spacing will be required to firm
2. The statement should specify whether it relates
to global or local estimates, and, if local, state the
the mineralised position and grade distribution suitable for final stope
designs. Inferred material relates to a global estimate.
relevant tonnages, which should be relevant to
technical
and
economic
evaluation.
Documentation
should
include
assumptions
made and the procedures used.
3. Mine to mill reconciliations for the FY2016 year have shown that Ore
Reserves has estimated within 2% of tonnes and 2% of grade providing a
minimal variance for metal. Tritton resource has been mined since 2005.
Reconciliations demonstrate the current models provide good confidence
3. These statements of relative accuracy and in the estimation and the estimation process used for the Tritton Resource.
confidence of the estimate should be compared
with production data, where available.

JORC CODE, 2012 EDITION SECTION 4 – TABLE 1 REPORT: TRITTON ORE RESERVE

Criteria **JORC Code explanation ** Commentary
Mineral 1. Description of the Mineral Resource estimate
1. The Ore Reserve estimate is based on the 30thJune 2016 Mineral Resource
Resource used as a basis for the conversion to an Ore
for Tritton mine, estimated by the Tritton Resource named_Model trifeb16_rsc-_
estimate for Reserve. 12032016.bmf.
conversion to 2. Clear statement as to whether the Mineral
Ore Reserves Resources are reported additional to, or
Mr Brad Cox is the competent person responsible for Mineral Resource
inclusive of, the Ore Reserves. Estimation and both estimating models.
Measured Mineral Resource is estimated above 4170mRL and Indicated
Mineral Resource below this level down to 4000mRL.
2. Mineral Resources are quoted as INCLUSIVE of the Ore Reserve estimate
Criteria **JORC Code explanation ** **JORC Code explanation ** Commentary
Site visits 1. Comment on any site visits undertaken by
1. Mr Ian Sheppard, competent person for the Tritton mine Ore Reserve, has
the Competent Person and the outcome of
visited the Tritton mine on several occasions and is familiar with the mine
those visits. conditions.
2. If no site visits have been undertaken
_indicate why this is the case. _
Study status 1. The type and level of study undertaken to
1. Tritton mine Ore Reserve estimate is based on ten years of mine production
enable Mineral Resources to be converted to
history, production budgets, and mine designs that in aggregate exceed the
Ore Reserves. level of detail expected from a feasibility study. The mine budget and
2. The Code requires that a study to at least
associated Life of Mine plan demonstrate the technical and economic viability
Pre-Feasibility Study
level

has

been

of mining the Ore Reserve.
undertaken to convert Mineral Resources to
Ore Reserves. Such studies will have been
2. Modifying factors used in the conversion of Mineral Resource to Ore Reserve
carried out and will have determined a mine
are based on reconciliation and observation of past mining and ore processing
plan that is technically achievable and
performance.
economically viable, and that material
_Modifying Factors have _ _been considered. _
Cut-off 1. The basis of the cut-off grade(s) or quality
1. The June 2016 Ore Reserve uses copper grade, Cu%, as the cut-off grade
parameters parameters applied. criteria.
2. A cut-off grade of 1.1% Cu is applied to whole stope estimates of grade after
dilution. Stopes are designed within the Mineral Resource grade envelope that
has been interpolated by geologists at a nominal 0.6% Cu cut-off. Designers
aim to reject as much mineralisation with grade less than 1.1% Cu as is
practical from the stope, however sub-cut-off grade mineralisation will be
included if necessary to generate a practical stope design. The average grade
of the whole stope volume is estimated to give the pre-dilution stope tonnage
and grade, (including any sub cut-off grade blocks within the stope). Dilution
from surrounding rock and from backfill is then estimated followed by
estimation of ore loss. Dilution and ore loss factors are applied to estimate the
diluted stope grade. The diluted whole of stope grade is tested against the
cut-off grade. The stope average diluted grade must exceed the 1.1% Cu cut-
off grade to be accepted.
3. Where access development tunnel designs are available, all Mineral
Resource inside these development design shapes and above 0.6% Cu is
converted directly to Ore Reserve without modification. A lower marginal cost
applies to this material equivalent only to the cost of ore processing. Mining
costs will be incurred irrespective of a decision to process this material or not.
Hence a lower cut-off grade of 0.6% Cu is applied. No dilution or ore loss
factors are applied to Mineral Resource contained within the development
shapes in the estimation of Ore Reserve.
Criteria **JORC Code explanation ** Commentary
4. Gold and silver grades in the ore are of minor importance as economic by-
products. Gold and silver grades are strongly correlated with copper grade
and this combined with minor economic importance means they need not be
included in the cut-off grade criteria. Gold in copper concentrate grades are
only occasionally above the payable limit of 1.0g/t. Silver in concentrate
grades are approximately 60g/t and so silver contributes a modest value of
AUD$40 to $50 per tonne copper concentrate.
5. There are no significant impurities in the mineralisation that require inclusion
inthe cut-offgrade criteria.
Mining factors 1. The method and assumptions used as
1. June 2016 Mineral Resources have been converted to; underground Ore
or assumptions reported in the Pre-Feasibility or Feasibility
Reserve by a process of detailed stope and development design. The life of
Study to convert the Mineral Resource to an
mine plan scheduled production is equivalent to the Ore Reserve.
Ore Reserve (i.e. either by application of
appropriate factors by optimisation or by
2. The mining method used at Tritton mine is underground open stoping with
preliminary or detailed design). cemented paste backfill. Open stope mining methods have been used with
2. The choice, nature and appropriateness of
success for ten years. Use of cemented paste fill allows high rates of
the selected mining method(s) and other
conversion of Mineral Resource to Ore Reserve, with no permanent pillars
mining
parameters
including
associated
required to be left.
design issues such as pre-strip, access, etc.
3. The
assumptions
made
regarding
3. Geotechnical stability of the stope designs is based on stable span
geotechnical parameters (eg pit slopes,
dimensions established over several years of operational experience with the
stope sizes, etc), grade control and pre- use of cemented paste fill. A modest level interval of 20m vertical is used to
production drilling. limit the length of hanging wall exposure in the shallow dipping (35 to 50
4. The major assumptions made and Mineral
degree) ore body. Tritton specific empirical design curves based on prior
Resource model used for pit and stope
stope stability are used to assist with design of stable spans.
optimisation (if appropriate).
5. The mining dilution factors used. 4. The Ore Reserve estimates for development and stope ore include the
6. The mining recovery factors used. volume of material that is below the cut-off grade and which is considered
7. Any minimum mining widths used. impractical to exclude from the surrounding or adjacent volume of ore. Such
diluting material is inclusive to the design ore volume and estimate of grade.
8. The manner in which Inferred Mineral
5. Ore recovery factor of 90% and dilution factor of 11% are applied in the
Resources are utilised in mining studies and
estimation of Ore Reserve for stopes less than 40m high; “small stopes”.
the sensitivity of the outcome to their
inclusion. 6. Ore recovery factor of 95% and dilution factor of 5% are applied in the
9. The
infrastructure
requirements

of
the

estimation of Ore Reserve for the largest stope 40m or higher.
selected mining methods.
7. Ore recovery factor of 50% and dilution factor of 20% are applied in the
estimation of Ore Reserve for the upper levels old pillar stopes.
Criteria **JORC ** **Code explanation ** Commentary
8. Dilution due to over break of the hanging wall of small stopes is estimated as
an average of 12 % for small stopes. A copper grade of 0.8% Cu is estimated
for this dilution, based on the results of stope reconciliation.
9. Dilution due to fall-off of paste fill from adjacent filled stopes is estimated as an
average of 3.0% for all stopes. There is no economic copper in the paste fill
dilution.
10. Ore loss due to under break on the footwall of the small stopes, (due the
shallow dip) is estimated as an average of 12% for all stopes. The grade of
this ore loss is assumed to be the average of the un-diluted stope grade.
11. Ore loss due to inability to recover all the broken ore is estimated at an
average of 2% for all stopes. The grade of this ore loss is assumed to be the
un-diluted stope grade.
12. The detailed modifying factors described in items 8 to 11 above are simplified
into the simple 90% ore recovery and 11% dilution factors applied in the Ore
Reserve estimate, giving the same estimate within precision of the estimate.
13. Inferred Mineral Resources is scheduled within the Life of Mine plan for
Tritton, however the small quantity of inferred material does not affect the
economic viability of the Ore Reserve. All Inferred Mineral Resource is
schedule for production after the Ore Reserve is exhausted and does not
impact the decision to mine the Ore Reserve material.
14. Capital development, ventilation, backfill distribution, electrical, pumping and
other infrastructure necessary to support the Tritton mine is installed
incrementally over time. The sustaining capital cost of installing the
infrastructureisincludedintheLife of Mine plan.
Metallurgical 1. The metallurgical process proposed and the
1. The Triton mine ore is treated at the existing Tritton ore processing plant
factors or appropriateness of that process to the style
located adjacent to the mine portal. Copper, gold and silver metal are
assumptions of mineralisation. recovered to a copper concentrate by sulphide flotation methods.
2. Whether the metallurgical process is well-
tested technology or novel in nature. 2. The sulphide flotation treatment method is proved on Tritton ore with over 12
3. The nature, amount and representativeness
million tonne of ore successfully treated to date.
of metallurgical test work undertaken, the
nature of the metallurgical domaining applied
and the corresponding metallurgical recovery
factors applied.
Criteria **JORC ** **Code explanation ** Commentary
4. Any assumptions or allowances made for 3. Tritton ore processing plant to produces a copper concentrate with 24%
deleterious elements. copper. Average recovery ranging from 94% to 95% of copper is achieved.
5. The existence of any bulk sample or pilot Gold is recovered to the copper concentrate at 45% recovery, however grades
scale test work and the degree to which such in the concentrate are generally below payable limits and only occasional
samples are considered representative of the value is derived from the gold. Silver recovery averages 75%.
orebody as a whole.
6. For
minerals
that
are
defined
by
a
4. The Ore Reserve assumes that no allowances are required for deleterious
specification, has the ore reserve estimation elements in the copper concentrate. This is supported by historical production
been based on the appropriate mineralogy to of a very clean concentrate.
_meet the specifications? _
Environmental 1. The
status
of
studies
of
potential
1. The Tritton deposit is located on ML1544. The mine is fully permitted for
environmental impacts of the mining and production.
processing operation. Details of waste rock
characterisation and the consideration of 2. Tailing from ore treatment are disposed to the existing Tritton Resources
potential sites, status of design options tailing storage facility. Closure of this tailing storage facility will be required at
considered and, where applicable, the status end of mine life. Sufficient topsoil and waste rock with suitable geochemistry is
of approvals for process residue storage and stockpiled and available for capping for capping of the facility at mine closure.
waste dumps should be reported.
3. Waste rock with potential to be acid forming is disposed into stopes
underground andnot stored onsurface.
Infrastructure 1. The existence of appropriate infrastructure: 1. The Tritton mine and ore processing site has all necessary infrastructure
availability of land for plant development, installed and operating. Infrastructure includes change facilities, offices,
power, water, transportation (particularly for workshops, electrical power, water, and road access. Sufficient skilled labour
bulk commodities), labour, accommodation; is available in region to support the mine and accommodation is available in
or the ease with which the infrastructure can the town of Nyngan located within 50km distance from the mine.
be provided, or accessed.
Land from which the Tritton mine is accessed is freehold lease owned by
Tritton ResourcesPtyLtd.
Costs 1. The derivation of, or assumptions made, 1. Capital costs for the Tritton mine include only sustaining capital for mine
regarding projected capital costs in the study. development, ventilation extension and mining equipment replacement. These
2. The methodology used to estimate operating costs are based on recent development experience and the purchase of
costs. similar mine equipment. Accuracy of estimate is at feasibility study or better
3. Allowances
made
for
the
content
of
precision, (± 15%). The sustaining capital expenditure schedules are included
deleterious elements. in the Life of Mine plan.
4. The derivation of assumptions made of metal
or commodity price(s), for the principal
minerals and co- products.
2. Tritton mine operating cost estimates are based on recent experience applied
to first principles build-up from physical schedules for the budget year (FY
2017 ending June 2017). The budget estimates are projected forward with
5. The source of exchange rates used in the
study.
appropriate modification to account for increasing depth of mining over time.
Accuracy beyond the budget year is considered to be ±15%.
6. Derivation of transportation charges.
  • Criteria JORC Code explanation Commentary 7. The basis for forecasting or source of 3. Metal price assumptions for copper, gold and silver are Aeris Resources treatment and refining charges, penalties for Limited corporate long term assumptions derived from a variety of market failure to meet specification, etc. sources – see next section.

  • 8. The allowances made for royalties payable, both Government and private. 4. Exchange rates used in the studies that support the Ore Reserve estimate are

  • Exchange rates used in the studies that support the Ore Reserve estimate are Aeris Resources Limited corporate long term assumptions derived from a variety of market sources – see next section.

  • Copper concentrate product transport costs include road and rail freight to port, port handling and sea freight. The costs assumed in the Life of Mine plan are based on the budget year contract rates with future changes based on market intelligence. Budget for financial year 2016 costs are approximately AUD$90 per dry tonne concentrate.

6. Copper concentrate treatment and refining charges assumed in the Life of 6. Copper concentrate treatment and refining charges assumed in the Life of
Mine plan are the financial year 2016 budget costs; USD$100/t concentrate
smelting and USD 10c/lb copper refining,
7. NSW government royalty of 4% is payable on revenue less deductible items.
After deductions, the effective royalty rate on revenue is approximately 3% for
Tritton Resources. No privateroyaltieswillapply.
Revenue factors 1. The derivation of, or assumptions made 1. Tritton Ore Reserve breakeven cut-off grade is calculated using the mid-term
regarding revenue factors including head (2018) Aeris Resources Limited forward looking economic assumptions
grade, metal or commodity price(s) exchange regards metal price, exchange rate, smelter treatment, and product handling
rates, transportation and treatment charges, cost:
penalties, net smelter returns, etc. a. Copper price of USD$5,200/tonne range
2. The derivation of assumptions made of metal b. Gold price of USD$1200/oz
or commodity price(s), for the principal c. Silver price of USD$17/oz
metals, minerals and co-products. d. AUD:USD exchange rate of 0.71
e. Copper treatment charge of USD$100/tonne
f. Copper refinery charge of USD10c/lb
g. Standard Tritton Resources contract smelter terms for payable
metal; effective copper payable is 95.8% for concentrate with 24%
copper content
h. Assumptions were current at June 2016
Criteria **JORC ** **Code explanation ** Commentary
Under this range of economic assumptions and the estimated operating
costs, the break-even grade varies from;

1.4% Cu if full site costs are included

1.1% Cu if only variable costs are considered (site fixed
administration cost ignored), and cost reduction from a change to
larger stopes.
Based on the above estimated range of break-even grades, a cut-off
grade of 1.1% Cu has been applied in the estimation of Ore Reserve.
Prior year cut-off grade was 1.2% Cu. In general, the shallow small stopes
in the Ore Reserve have been designed to this slightly higher cut-off
grade.
The cut-off grade policy applied in the estimate of Ore Reserves is derived
by testing the value of the whole Tritton Operations business at a range of
design cut-off grades. The selected cut-off policy of 1.1% Cu was shown
toreturnthe bestvalue giventhe assumedforward curveforcopperprice.
Market 1. The demand, supply and stock situation for 1. The world market for copper concentrate is large compared to production from
assessment the
particular
commodity, consumption Tritton mine. The Tritton mine copper concentrate is a very clean product with
trends and factors likely to affect supply and low impurities and demand for this product from copper smelters is expected
demand into the future. to remain high.
2. A customer and competitor analysis along
with the identification of likely market All copper concentrate is sold under life of mine contract to Glencore
windows for the product. International AG.
3. Price and volume forecasts and the basis for
these forecasts.
4. For
industrial
minerals
the
customer
specification,
testing
and acceptance
_requirements prior to a supply contract. _
Economic 1. The inputs to the economic analysis to 1. The Tritton Life of Mine plan and associated commercial model estimates a
produce the net present value (NPV) in the positive Net Present Value for the operation at a discount rate of 7%. The
study, the source and confidence of these economic assumptions used in the valuation of the Life of Mine plan vary over
economic inputs including estimated inflation, time. They are consistent with the assumptions of economic inputs applied in
discount rate, etc. the calculation of break-even grade discussed above.
2. NPV ranges and sensitivity to variations in
the significant assumptions and inputs. 2. The Tritton mine is one of several mines that will supply ore to the Tritton
processing plant in the Life of Mine plan. The plan assumes that Tritton mine
shares the cost of site administration, processing plant sustaining capital and
otheroverheadswiththe other mines.
Criteria **JORC ** **Code explanation ** Commentary
Social 1. The
status
of
agreements
with
key
1. The Tritton mine is located on existing Mining Lease ML1544. The mine is
stakeholders and matters leading to social
fully approved to operate.
licence to operate.
2. Tritton Resources is based in the township of Nyngan in the Bogan Shire
NSW. Strong community support for the continued operation of Tritton
Resources has been evidenced in regular community consultation sessions.
There are no known objections from the community against the Tritton
Resources operations. Tritton Resources owns the land on which access to
Tritton mineislocated.
Other 1. To the extent relevant, the impact of the
1. No material natural risks have been identified for the Ore Reserves.
following on the project and/or on the
estimation and classification of the Ore
2. All copper concentrate produced by Tritton Resources from the Tritton mine
Reserves: will be sold to Glencore International AG under an existing life of mine
2. Any identified material naturally occurring
contract.
risks.
3. The status of material legal agreements and
marketing arrangements.
4. The status of governmental agreements and
approvals critical to the viability of the project,
such as mineral tenement status, and
government and statutory approvals. There
must be reasonable grounds to expect that
all necessary Government approvals will be
received within the timeframes anticipated in
the
Pre-Feasibility
or
Feasibility
study.
Highlight and discuss the materiality of any
unresolved matter that is dependent on a
third party on which extraction of the reserve
_is contingent. _
Classification 1. The basis for the classification of the Ore
1. The Proved Ore Reserve estimate results from the conversion of Measured
Reserves into varying confidence categories.
Mineral Resource. The end of the Measured Mineral Resource for June 2016
2. Whether the result appropriately reflects the
is set at RL4170m, which is the limit of completed grade control drilling. Above
Competent Person’s view of the deposit. RL4170m is Proved Ore Reserve and Probable Ore Reserve is below this
3. The proportion of Probable Ore Reserves
level.
that have been derived from Measured
Mineral Resources (if any). 2. Below RL4170m all Ore Reserve is categorized as Probable. This Ore
Reserve is based on the conversion of Indicated Mineral Resource described
by the resource model.
Criteria
JORC Code explanation
Commentary
Criteria
JORC Code explanation
Commentary
3.
4.
A Probable Ore Reserve of 0.27Mt has been estimated by conversion of
blocks of resource remaining as pillars between completed primary stopes
that were mined before the operation used cemented backfill. These blocks of
pillar resource are located in the upper levels of the mine; RL4860m and
above. The pillar Ore Reserve is derived from Indicated Mineral Resources.
Uncertainty over the geotechnical condition of the rock mass in the pillar
resource would have been applied as a modifying factor in the estimation of
the pillar Ore Reserve. Only Probable Ore Reserve would be estimated for the
pillars, irrespective of the resource categorization.
The classification of the Ore Reserve as a combination of Proved and
Probable is an appropriate reflection of the conditions in Tritton mine in the
opinionofthe competent person,Mr IanSheppard.
Audits
or
reviews
1. The results of any audits or reviews of Ore
Reserve estimates.
1.
No audits of this June 30th2016 Ore Reserve have been completed. Previous
Ore Reserve estimates have been externally reviewed as part of requirements
forprovisionof financewith no significant discrepanciesfound.
Discussion
of
relative
accuracy/
confidence
2. Where appropriate a statement of the relative
accuracy and confidence level in the Ore
Reserve
estimate
using
an
approach
or
procedure deemed appropriate by the Competent
Person. For example, the application of statistical
or geostatistical procedures to quantify the
relative accuracy of the reserve within stated
confidence limits, or, if such an approach is not
deemed appropriate, a qualitative discussion of
the factors which could affect the relative
accuracy and confidence of the estimate.
3. The statement should specify whether it relates
to global or local estimates, and, if local, state the
relevant tonnages, which should be relevant to
technical
and
economic
evaluation.
Documentation
should
include
assumptions
made and the procedures used.
4. Accuracy and confidence discussions should
extend to specific discussions of any applied
Modifying Factors that may have a material
impact on Ore Reserve viability, or for which
there are remaining areas of uncertainty at the
current study stage.
1.
For Tritton mine;
Criteria
Risk
Rating
Comment
Mineral
Resource
estimate for
conversion to
Ore Reserves
Low
Reconciliation of the Mineral Resource and
Ore
Reserve
shows
good
correlation
between
actual
and
estimated;
<5%
difference on tonne, Cu grade and contained
Cu metal for Proved Ore Reserve. The
resource modelling that supports Indicated
Mineral Resource estimates has been
shown to be moderately conservative after
reconciliation with modelling that supports
Measured Mineral Resource (based on
greater drilling density).
Classification
Low
All
Probable
Ore
Reserve
based
on
Indicated
Mineral
Resource.
No
complications from modifying factors.
Site visit
Low
Site visits completed. Tritton is an operating
mine with 10 years production history.
Study status
Low
Ore Reserves are support by Life of Mine
plan and budgets that are higher precision
than Feasibility Study.
Criteria
JORC Code explanation
Commentary
Criteria
JORC Code explanation
Commentary
5. It is recognised that this may not be possible or
appropriate
in
all
circumstances.
These
statements of relative accuracy and confidence
of the estimate should be compared with
production data, where available.
Cut-off grade High Cut-off grade is sensitive to mine operating
costs achieved and dilution in addition to the
normal metal price volatility risk.
Mining factors Medium Dilution and ore loss factors are derived
from detailed stope review and reconciliation
of actual to reserve estimate
Metallurgy
factors
Low Tritton ore has been processed for ten (10)
years
achieving
metal
recoveries
and
concentrate quality consistent with those
assumed in the preparation of the Ore
Reserve.
Environmental Low Located on existing Mining Lease with all
approvals in place.
Infrastructure Low All required significant infrastructure is in
place.
Costs Low Estimates are based on recent operating
cost experience.
Revenue
Factors
High Copper metal price has high annual
variability. Tritton mine cash margins after
sustaining
capital
are
moderate
and
operations could be suspended during
periods of extended low metal price.
Market
assessment
Low Life of mine concentrate sale contract is in
place.
Economics High Risk reflects impact of metal price variability
and modest grade of the deposit for a deep
underground mine.
Social Low Continued operation of the Tritton Mine is
strongly supported by the local community at
Nyngan.