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ST GEORGE MINING LIMITED — Capital/Financing Update 2015
Mar 16, 2015
65782_rns_2015-03-16_3ce967b0-7944-4086-8bf4-1dde0fcbe8f6.pdf
Capital/Financing Update
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ASX / MEDIA RELEASE
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17 March 2015
HIGH QUALITY NICKEL SULPHIDE TARGETS IDENTIFIED AT DESERT DRAGON NORTH
HIGHLIGHTS:
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Multiple high quality targets for massive nickel sulphides identified at Desert Dragon North
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Strong EM conductors with favourable geological, geochemical and structural attributes
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Interpretative work is continuing to generate more targets for ongoing drilling campaign
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Drilling is planned to re‐commence in March/April 2015
DESERT DRAGON NORTH – KNOWN MASSIVE NICKEL SULPHIDES
St George Mining Limited (ASX: SGQ) (“St George” or “the Company”) is pleased to announce the identification of additional high quality nickel sulphide targets at the Desert Dragon North prospect, situated within its 100% owned East Laverton Nickel Sulphide Project in Western Australia (“St George’s Project” or “the Project”).
Desert Dragon North is within an 18km strike length of the Stella Range belt which the recently completed Technical Review of the Project, led by global nickel expert Dr Jon Hronsky, selected as being the most prospective area for nickel sulphide mineralisation within the Project tenements.
Drill hole DDNRC002 lies within the Desert Dragon North area, and intersected 2m @ 1.08%Ni from 55m and 2m @ 0.43%Ni from 59m. A downhole analysis of DDNRC002 is illustrated in Figure 1.
The DDNRC002 intersection is very significant as it is evidence of the formation of massive nickel sulphides at St George’s East Laverton Project, and confirms the potential for the large high‐MgO ultramafic complexes at the Project to host massive nickel sulphides.
A photograph of the massive nickel sulphides intersected by DDNRC002, which are in the form of stringer veinlets, is shown in Figure 2. Importantly, a high Iridium/Palladium ratio for this mineralisation confirms that it is a fragment of a larger body of massive sulphides and not the product of alteration and shearing locally concentrating disseminated mineralisation.
The ultramafic at DDNRC002 is in contact with a shear zone. The geological and structural evidence suggests the lens of ultramafic hosting this significant intersection was mechanically remobilised by the shear zone, and is from a proximal source.
Exploration targeting at Desert Dragon North has been escalated following the findings of the Technical Review, and already 3 exciting targets have been established. These are discussed below.
Mr John Prineas, Executive Chairman of St George Mining said:
“The recent Technical Review has identified the Desert Dragon area as having the potential to emerge as a new nickel camp.
“It’s therefore very encouraging to see the high quality targets with strong EM conductors being generated at Desert Dragon North, an area where massive nickel sulphide veinlets have already been intersected.
“The anticipation for our next drilling program is building.”
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ASX / MEDIA RELEASE
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Figure 1 – Downhole profile of drill hole DDNRC002. The hole passed through sheared ultramafic (higher MgO to lower MgO), sulphidic sediments, mafic rocks, and further sulphidic sediments. The shear zone identified in the hole is important, and is the likely mechanism for the remobilisation of the nickel sulphides encountered in DDNRC002.
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Figure 2 – Visible massive nickel sulphide stringers intersected in DDNRC002 between 55m – 56m down hole. The sulphides lie within a fresh rock intersection of 2m @ 1.08% Ni from 55m.
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ASX / MEDIA RELEASE
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TARGET 1 – IS THIS THE PRIMARY SOURCE OF THE REMOBILISED NICKEL ?
Target 1 has been identified as a high priority target to test for the primary source of the nickel sulphides in drill hole DDNRC002.
Target 1 is a high amplitude and isolated section of an EM conductor identified by Newexco and labelled Conductor 11. The conductor is favourably situated on the margin of a high‐MgO komatiite channel flow, which has been inferred from the strong coincident TMI magnetic response.
Three lines of the MLEM survey at Conductor 11 returned a very powerful EM response, which contrasted with the lower responses to the north and south along this conductor. The conductance of the high amplitude section of Conductor 11 was 5500 Siemens in contrast with the remainder of the conductor with a conductance of 670 Siemens. This is a significant variance within the long strike EM response that is modelled as a continuous sequence of sulphidic sediments.
The three lines with the powerful EM response, 333200, 333600 and 334000, could represent an isolated source in close proximity – such as a nickel sulphide deposit on the contact between the ultramafics and underlying sediments.
There are many examples in Western Australia, including at Forrestania and at the nickel camps of the Agnew‐Wiluna belt, where sulphide‐rich sediments are intimately associated with nickel sulphide mineralisation. One such example is the Windarra nickel sulphide deposit; see Figure 3.
The EM conductor at Target 1 is to the north of DDNRC002 and linked to the drill hole by an interpreted shear zone (see Figure 4). The remobilisation of the massive nickel sulphides and associated lens of ultramafic may have occurred along this shear zone.
Target 1 has geophysical, structural and geological attributes which are favourable for nickel sulphide mineralisation. The high amplitude section of the EM conductor is a compelling target that could be the source of the nickel sulphide mineralisation in DDNRC002.
TARGET 2 – STRONG EM CONDUCTOR IN UNIQUE STRUCTURAL SETTING
Target 2 is situated to the south of drill hole DDNRC002 (2m @ 1.08% Ni from 55m) and covers part of an EM conductor identified by Newexco and labelled ‘Anomaly 12’ (see Figure 4).
All conductors identified at Desert Dragon dip to the west other than Anomaly 12, which dips to the east. The easterly dip is consistent with the interpreted thrust folding in the area. The geometry of the conductive plate is structurally anomalous and may be significant.
The section of the EM conductor that is being targeted is at the southern portion of Anomaly 12. This section is coincident with the western margin of a very strong gravity anomaly that could represent dense, sulphide‐rich rocks (see Figure 5). In addition, the target is situated in the fold closure of a south plunging fold – an area that is favourable for the structural concentration of massive nickel sulphide mineralisation.
The geological and structural attributes of this prospect support the significance of this high quality EM target as a potential massive nickel sulphide deposit.
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Figure 3 – this map of the geology at the Windarra nickel sulphide deposit illustrates the close association between sulphidic sediments and nickel sulphide mineralisation at Windarra. The map is based on the geological map for the Windarra nickel sulphide deposit in Marston, R.J., (1984): Nickel Mineralisation in Western Australia, Geological Survey of Western Australia. Mineral Resources Bulletin, 14
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Figure 4 – The Desert Dragon North prospect area shown against RTP magnetics (reduction to the pole magnetics). The three priority targets for massive nickel sulphide mineralisation are illustrated.
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Figure 5 – Desert Dragon North against gravity data. Target 2 is a strong late‐time conductor that lies along the western margin of a strong gravity high, which is likely to represent sulphide‐rich rocks
TARGET 3 – UNTESTED KOMATIITE CHANNEL
The northern most komatiite channel complex at Desert Dragon North and its associated conductors remain untested. This large channel complex presents as a positive magnetic anomaly and is a particularly favourable structural site given its location immediately adjacent to the intersection of a major NE trending structure and the Stella Range fault.
This type of structural intersection is important as it is typically the site of high magma volumes and flow rates, producing hot and turbulent conditions for the komatiite flows and enhanced conditions for nickel sulphide formation.
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Target 3 is a strong EM conductor with a location modelled on the ultramafic contact of this untested channel complex (see Figure 4).
PREPARATION FOR DRILLING
Final planning to design optimal sites for the drill holes that will test these targets is scheduled to be completed this week.
The preparations for re‐commencement of drilling are advanced with drilling planned to begin later this month or early April, depending on the timing for the mobilisation of the drill rig to site.
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For further information, please contact:
John Prineas Colin Hay Executive Chairman Professional Public Relations St George Mining Limited (+61) 08 9388 0944 mob 0404 683 355 (+61) 411 421 253 [email protected] [email protected]
Competent Person Statement:
The information in this report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Mr Timothy Hronsky, a Competent Person who is a Member of The Australasian Institute of Mining and Metallurgy. Mr Hronsky is employed by Essential Risk Solutions Ltd which has been retained by St George Mining Limited to provide technical advice on mineral projects.
Mr Hronsky has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Hronsky consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
The information in this announcement that relates to Exploration Results and Mineral Resources as defined in the 2004 edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ is based on information compiled by Mr Hronsky. Mr Hronsky is a member of the Australasian Institute of Mining and Metallurgy has sufficient experience, which is relevant to the style of mineralisation and type of deposit under consideration and to the activity, which he is undertaking. This qualifies Mr Hronsky as a “Competent Person” as defined in the 2004 edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Hronsky consents to the inclusion of information in this announcement in the form and context in which it appears.
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The following section is provided for compliance with requirements for the reporting of exploration results under the JORC Code, 2012 Edition.
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections)
| Criteria | JORC Code explanation | JORC Code explanation | JORC Code explanation | Commentary | |
|---|---|---|---|---|---|
| Sampling | Nature and quality | of sampling (eg cut | This ASX Release dated 17 March 2015 reports on new targets | ||
| techniques | channels, random chips, or specific specialised | generated at the Company’s East Laverton Nickel Sulphide Project. | |||
| industry | standard | measurement | tools |
The ASX Release does not report any new exploration results, and | |
| appropriate | to |
the minerals |
under | the targets are generated by a review of past exploration results | |
| investigation, such | as down hole | gamma | particularly drilling programs and electromagnetic surveys |
||
| sondes, or | handheld XRF instruments, etc). | completed recently at the Project. | |||
| These examples should not be taken as limiting the broad meaning of sampling. |
Drilling programs have included diamond core drilling completed by DDH1 Drilling Pty Ltd and reverse circulation (RC) drilling completed |
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| by VM Drilling Pty Ltd. | |||||
| Diamond drilling was undertaken by DDH1 in 2014 using a Sandvik | |||||
| 1200 Multipurpose truck mounted drill rig. RC drilling was | |||||
| undertaken by VM Drilling in 2014 using a Schramm 685 truck | |||||
| mounted drill rig. | |||||
| _Diamond Core Sampling:_The core is removed from the drill rig and | |||||
| laid out for initial analysis in the field. The core is measured and | |||||
| marked up at 1m intervals against the drillers blocks, which are | |||||
| themselves checked against the drillers log books where required. | |||||
| The visible structural features on the core are measured against the | |||||
| core‐orientation lines. | |||||
| Onsite XRF analysis is conducted using a hand‐held Olympus Innov‐X | |||||
| Spectrum Analyser. The XRF analysis is used to systematically review | |||||
| diamond drill core, with a single reading taken every metre, except | |||||
| in the case of core loss. These results are only used for onsite | |||||
| interpretation and preliminary base metal assessment subject to | |||||
| final geochemical analysis by laboratory assays. | |||||
| The sections of the core that are selected for assaying are marked | |||||
| up and recorded on a “cut‐sheet” which provides a control on the | |||||
| intervals that will be cut and sampled at a duly certified assay | |||||
| laboratory, SGS Laboratories. Core is prepared for analysis at 1m | |||||
| intervals or at lesser intervals of geological significance. Core is cut | |||||
| in half lengthways and then numbered samples are taken as per the | |||||
| “cut‐sheet”. | |||||
| Diamond core provides high quality samples that are logged for | |||||
| lithological, structural, geotechnical, density and other attributes. | |||||
| Sampling is carried out under QAQC procedures as per industry best | |||||
| practice. | |||||
| RC Sampling: All samples from the RC drilling are taken as 1m | |||||
| samples. Samples are sent to Intertek Laboratories for assaying. | |||||
| Appropriate QAQC samples (standards, blanks and duplicates) are | |||||
| inserted into the sequences as per industry best practice. | |||||
| Samples are collected using cone or riffle splitter. Geological logging | |||||
| of RC chips is completed at site with representative chips being | |||||
| stored in drill chip trays. | |||||
| Onsite XRF analysis is conducted on the fines from RC chips using a | |||||
| hand‐held Olympus Innov‐X Spectrum Analyser. These results are | |||||
| only used for onsite interpretation and preliminary assessment | |||||
| subject to final geochemical analysis by laboratory assays. | |||||
| Moving loop electromagnetic (MLEM) survey: The MLEM survey is | |||||
| designed and managed by Newexco, with field work contracted to | |||||
| Bushgum PtyLtd. The MLEM surveyis conducted at several |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| prospects within the project area. | ||
| Key specifications of the MLEM survey are: | ||
| Stations Spacing: 100m |
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| Loop: 400m, 200m |
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| Line Spacing: 400m | ||
| Components: x y z |
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| Orientation: X along line (local east ‐ positive). |
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| Line direction: 58.35, 90 degrees |
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| Frequency: 0.5, 0.25 Hz |
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| Channels: SMARTem Standard. |
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| Receiver: Fluxgate |
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| Number turns: 1 |
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| Current: Typically 50 A. |
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| Repeats: Minimum 3 consistent readings per station. |
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| Down‐hole electromagnetic (DHEM) survey: A DHEM survey will be | ||
| completed for certain drill holes. The DHEM survey is designed and | ||
| managed by Newexco Services Pty Ltd, with field work contracted to | ||
| Bushgum Holdings Pty Ltd. | ||
| Key specifications of the DHEM survey are: | ||
| System: Atlantis (analogue) | ||
| Components: A, U, V |
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| Component direction: | ||
| Ba – Parallel to hole axis, positive up hole. |
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| Bu – Perpendicular to hole axis: toward 12 o’ clock when |
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| looking down hole. | ||
| Bv – Perpendicular to hole axis: toward 9 o’ clock when |
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| looking down hole. | ||
| Include reference to measures taken to ensure | _Diamond Core Sampling:_For diamond core samples, certified |
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| sample representivity and the appropriate | sample standards were added as every 25thsample. Core recovery |
|
| calibration of any measurement tools or | calculations are made through a reconciliation of the actual core |
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| systems used. | and the driller’s records. Downhole surveys of dip and azimuth | |
| were conducted using a single shot camera every 30m to detect | ||
| deviations of the hole from the planned dip and azimuth. The drill‐ | ||
| hole collar locations were recorded using a hand held GPS, which | ||
| has an accuracy of +/‐ 5m. At a later date the drill‐hole collar will be | ||
| surveyed to a greater degree of accuracy. | ||
| _RC Sampling:_The RC drilling rig has a cone splitter built into the | ||
| cyclone on the rig. Samples are taken on a one meter basis and | ||
| collected directly from the splitter into uniquely numbered calico | ||
| bags. The calico bag contains a representative sample from the drill | ||
| return for that metre. This results in a representative sample being | ||
| taken from drill return, for that metre of drilling. The remaining | ||
| majority of the sample return for that metre is collected and stored | ||
| in a green plastic bag marked with that specific metre interval. The | ||
| cyclone is blown through with compressed air after each plastic and | ||
| calico sample bag is removed. If wet sample or clays are | ||
| encountered then the cyclone is opened and cleaned manually and | ||
| with the aid of a compressed air gun. | ||
| A large auxiliary compressor (“air‐pack”) is mounted on a separate | ||
| truck and the airstream is connected to the rig. This provides an | ||
| addition to the compressed air supplied bythe in‐built compressors |
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| Criteria | JORC Code explanation | Commentary | |
|---|---|---|---|
| mounted on the drill rig itself. This auxiliary compressor maximises | |||
| the sample return through restricting air pressure loss, especially in | |||
| deeper holes. In addition, the high and consistent levels of air | |||
| pressure minimise the number of drill samples. | |||
| Geological logging of RC chips is completed at site with | |||
| representative chips being stored in drill chip trays. Downhole | |||
| surveys of dip and azimuth are conducted using a single shot camera | |||
| every 30m to detect deviations of the hole from the planned dip and | |||
| azimuth. The drill‐hole collar locations were recorded using a hand | |||
| held GPS, which has an accuracy of +/‐ 5m. At a later date the drill‐ | |||
| hole collar will be surveyed to a greater degree of accuracy. | |||
| _MLEM Survey:_Field calibration of the survey instruments using | |||
| standards is undertaken each day. A minimum of 3 consistent | |||
| readings per station are taken to ensure accuracy of data collected. | |||
| _DHEM Survey:_For the DHEM survey, the polarity of each component | |||
| is checked to ensure the system was set up using the correct | |||
| component orientations. The hole position is corrected for | |||
| trajectory using orientation survey data. | |||
| Aspects of the determination of mineralisation | _Diamond Core Sampling: C_ore is drilled with HQ and NQ2 size and | ||
| that are Material to the Public Report. | sampled as half core to produce a bulk sample for analysis. Intervals | ||
| In cases where ‘industry standard’ work has been done this would be relatively simple (eg |
vary from 0.3 – 1m maximum and are selected with an emphasis on geological control. |
||
| ‘reverse circulation drilling was used to obtain | Assays are completed at SGS Laboratories in Perth. Samples are sent | ||
| 1 m samples from which 3 kg was pulverised to | to SGS where they are crushed to 6 mm and then pulverised to 75 | ||
| produce a 30 g charge for fire assay’). In other | microns. A 30 g charge of the sample is fire assayed for gold, | ||
| cases more explanation may be required, such | platinum and palladium. The detection range for gold is 1 – 2000 | ||
| as where there is coarse gold that has inherent | ppbAu, and 0.5 – 2000 ppb for platinum and palladium. This is | ||
| sampling problems. Unusual commodities or | believed to be an appropriate detection level for these elements | ||
| mineralisation types (eg submarine | nodules) | within this specific mineral environment. However, should Au, Pt or | |
| may warrant disclosure of |
detailed | Pd levels reported exceed these levels an additional assay method | |
| information. | will be used to re‐test samples. | ||
| All other metals will be analysed using an acid digest and an ICP | |||
| finish. The sample is digested with nitric, hydrochloric, hydrofluoric | |||
| and perchloric acids to effect as near to total solubility of the sample | |||
| as possible. The solution containing samples of interest, including | |||
| those that need further review, will then be presented to an ICP‐OES | |||
| for the further quantification of the selected elements. | |||
| _RC Sampling:_A 1m composite sample is taken from the bulk sample | |||
| of RC chips that may weigh in excess of 40 kg. Assay preparation is | |||
| completed by Intertek. | |||
| Assays are undertaken at Intertek in Kalgoorlie and Perth. Samples | |||
| are sent to Intertek where they are crushed to 6 mm and then | |||
| pulverised to 75 microns. A 30 g charge of the sample is fire assayed | |||
| for gold, platinum and palladium. The detection range for gold is 1 – | |||
| 2000 ppbAu, and 0.5 – 2000 ppb for platinum and palladium. This is | |||
| believed to be an appropriate detection level for these elements | |||
| within this specific mineral environment. However, should Au, Pt or | |||
| Pd levels reported exceed these levels an additional assay method | |||
| will be used to re‐test samples. | |||
| All other metals will be analysed using an acid digest and an ICP | |||
| finish. The sample is digested with nitric, hydrochloric, hydrofluoric | |||
| and perchloric acids to effect as near to total solubility of the sample | |||
| as possible. The solution containing samples of interest, including | |||
| those that need further review, will then be presented to an ICP‐OES | |||
| for the further quantification of the selected elements. | |||
| Drilling | Drill type (eg core, reverse circulation, open‐ | _Diamond Core Sampling:_The collars of the diamond holes were | |
| techniques | hole hammer, rotary air blast, auger, Bangka, | drilled using RC drilling down through the regolith to the point of | |
| sonic, etc) and details(eg core diameter, triple | refusal or to a level consideredgeologicallysignificant to change to |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| or standard tube, depth of diamond tails, face‐ | core. The hole was then continued using HQ diamond core until the | |
| sampling bit or other type, whether core is | drillers determined that a change to NQ2 coring was required. | |
| oriented and if so, by what method, etc). | The core is oriented and marked by the drillers. The core is oriented | |
| using ACT Mk II electric core orientation. | ||
| _RC Sampling:_The RC drilling uses a 140 mm diameter face hammer | ||
| tool. High capacity air compressors on the drill rig are used to | ||
| ensure a continuously sealed and high pressure system during | ||
| drilling to maximise the recovery of the drill cuttings, and to ensure | ||
| chips remain dry to the maximum extent possible. | ||
| Drill sample | Method of recording and assessing core and | _Diamond Core Sampling:_Diamond core recoveries/core loss are |
| recovery | chip sample recoveries and results assessed. | recorded during drilling and reconciled during the core processing |
| and geological logging. No significant sample recovery problems are | ||
| thought to have occurred in any holes drilled to date. There has | ||
| been a notable and consistent competency encountered in the rocks | ||
| during drilling. | ||
| _RC Sampling:_RC samples are visually checked for recovery, moisture | ||
| and contamination. Geological logging is completed at site with | ||
| representative RC chips stored in chip trays. | ||
| Measures taken to maximise sample recovery and ensure representative nature of the samples. |
_Diamond Core Sampling:_Depths are checked against the depth on the core blocks and rod counts are routinely carried out by the drillers. Core loss was recorded by St George geologists and |
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| sampling intervals were not carried through core loss. | ||
| _RC Sampling:_Samples are collected using cone or riffle splitter. | ||
| Geological logging of RC chips is completed at site with | ||
| representative chips being stored in drill chip trays. | ||
| Whether a relationship exists between sample | To date, no detailed analysis to determine the relationship between | |
| recovery and grade and whether sample bias | sample recovery and grade has been undertaken for any drill | |
| may have occurred due to preferential | program. This analysis will be conducted following any economic | |
| loss/gain of fine/coarse material. | discovery. | |
| The nature of magmatic sulphide distribution hosted by the | ||
| competent and consistent rocks hosting any mineralised intervals | ||
| are considered to significantly reduce any possible issue of sample | ||
| bias due to material loss or gain. | ||
| Logging | Whether core and chip samples have been | Geological logging is carried out on all drill holes with lithology, |
| geologically and geotechnically logged to a | alteration, mineralisation, structure and veining recorded. | |
| level of detail to support appropriate Mineral | ||
| Resource estimation, mining studies and | ||
| metallurgical studies. | ||
| Whether logging is qualitative or quantitative | Logging of diamond core and RC samples records lithology, | |
| in nature. Core (or costean, channel, etc) | mineralogy, mineralisation, structures (core only), weathering, | |
| photography. | colour and other noticeable features. Core was photographed in | |
| both dry and wet form. | ||
| The total length and percentage of the relevant | All drill holes are geologically logged in full and detailed litho‐ | |
| intersections logged. | geochemical information is collected by the field XRF unit. The data | |
| relating to the elements analysed is used to determine further | ||
| information regarding the detailed rock composition. | ||
| Sub‐sampling | If core, whether cut or sawn and whether | The HQ and NQ2 core is cut in half length ways in Kalgoorlie using an |
| techniques and | quarter, half or all core taken. | automatic core saw. All samples are collected from the same side of |
| sample | the core. The half‐core samples are submitted to SGS for analysis. | |
| preparation | ||
| If non‐core, whether riffled, tube sampled, | RC samples are collected in dry form. Samples are collected using | |
| rotary split, etc and whether sampled wet or | cone or riffle splitter when available. Geological logging of RC chips | |
| dry. | is completed at site with representative chips being stored in drill | |
| chip trays. |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| For all sample types, the nature, quality and | _Diamond Core Sampling:_Diamond core was drilled with HQ and | |
| appropriateness of the sample preparation | NQ2 size and sampled as complete half core to produce a bulk | |
| technique. | sample for analysis. Intervals selected varied from 0.3 – 1m | |
| (maximum) with a strong geological control (as is possible in | ||
| diamond core) to ensure grades are representative, i.e. remove any | ||
| bias through projecting assay grades beyond appropriate geological | ||
| boundaries. | ||
| Assay preparation procedures ensure the entire sample is pulverised | ||
| to 75 microns before the sub‐sample is taken. This removes the | ||
| potential for the significant sub‐sampling bias that can be | ||
| introduced at this stage. | ||
| RC Sampling: Sample preparation for RC chips follows a standard | ||
| protocol. | ||
| Assay preparation procedures ensure the entire sample is pulverised | ||
| to 75 microns before the sub‐sample is taken. This removes the | ||
| potential for the significant sub‐sampling bias that can be | ||
| introduced at this stage. | ||
| Quality control procedures adopted for all sub‐ | _Diamond Core Sampling:_Drill core is cut in half lengthways and the | |
| sampling stages to maximise representivity of | total half‐core submitted as the sample. This meets industry | |
| samples. | standards where 50% of the total sample taken from the diamond | |
| core is submitted. | ||
| RC Sampling: Field QC procedures maximise representivity of RC | ||
| samples and involve the use of certified reference material as assay | ||
| standards, along with blanks, duplicates and barren washes. | ||
| Measures taken to ensure that the sampling is | _Diamond Core Sampling:_The retention of the remaining half‐core is | |
| representative of the in situ material collected, | an important control as it allows assay values to be determined | |
| including for instance results for field | against the actual geology; and where required a quarter core | |
| duplicate/second‐half sampling. | sample may be submitted for assurance. No resampling of quarter | |
| core or duplicates has been done at this stage of the project_._ | ||
| _RC Sampling:_Field duplicates were taken on 1m composites for RC | ||
| samples. | ||
| Whether sample sizes are appropriate to the | The sample sizes are considered to be appropriate to correctly | |
| grain size of the material being sampled. | represent the sulphide mineralisation at the East Laverton Property | |
| based on: the style of mineralisation (massive and disseminated | ||
| sulphides), the thickness and consistency of the intersections and | ||
| the sampling methodology. | ||
| Quality of | The nature, quality and appropriateness of the | For diamond core and RC sampling, a 30 gram sample will be fire |
| assay data and | assaying and laboratory procedures used and | assayed for gold, platinum and palladium. The detection range for |
| laboratory | whether the technique is considered partial or | gold is 1 – 2000 ppbAu, and 0.5 – 2000 ppb for platinum and |
| tests | total. | palladium. This is believed to be an appropriate detection level for |
| the levels of these elements within this specific mineral | ||
| environment. However, should Au, Pt or Pd levels reported exceed | ||
| these levels; an alternative assay method will be selected. | ||
| All other metals will be analysed using an acid digest and an ICP | ||
| finish. The sample is digested with nitric, hydrochloric, hydrofluoric | ||
| and perchloric acids to effect as near to total solubility of the sample | ||
| as possible. The solution containing samples of interest, including | ||
| those that need further review, will then be presented to an ICP‐OES | ||
| for the further quantification of the selected elements. | ||
| For geophysical tools, spectrometers, handheld | A handheld XRF instrument (Olympus Innov‐X Spectrum Analyser) is |
|
| XRF instruments, etc, the parameters used in | used to systematically analyse the drill core and RC chips onsite. |
|
| determining the analysis including instrument | Reading time was 60 seconds. The instruments are serviced and |
|
| make and model, reading times, calibrations | calibrated at least once a year. Field calibration of the XRF |
|
| factors applied and their derivation, etc. | instrument using standards is undertaken each day. | |
| For the EM surveys, specifications and quality control measures are | ||
| noted above. |
5
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Nature of quality control procedures adopted | Laboratory QAQC involves the use of internal lab standards using |
|
| (eg standards, blanks, duplicates, external | certified reference material, blanks, splits and replicates as part of in |
|
| laboratory checks) and whether acceptable | house procedures. The Company will also submit an independent |
|
| levels of accuracy (ie lack of bias) and precision | suite of CRMs, blanks and field duplicates (see above). |
|
| have been established. | ||
| Verification of | The verification of significant intersections by | Significant intersections are verified by the Company’s Technical |
| sampling and | either independent or alternative company | Director and Consulting Field Geologist. |
| assaying | personnel. | |
| The use of twinned holes. | No twinned holes have been completed. | |
| Documentation of primary data, data entry | Geological data was collected using handwritten log sheets and | |
| procedures, data verification, data storage | imported in the field onto a laptop detailing geology (weathering, | |
| (physical and electronic) protocols. | structure, alteration, mineralisation), sampling quality and intervals, | |
| sample numbers, QA/QC and survey data. This data, together with | ||
| the assay data received from the laboratory and subsequent survey | ||
| data was entered into the Company’s database. | ||
| Discuss any adjustment to assay data. | No adjustments or calibrations will be made to any primary assay | |
| data collected for the purpose of reporting assay grades and | ||
| mineralised intervals. For the geological analysis, standards and | ||
| recognised factors may be used to calculate the oxide form assayed | ||
| elements, or to calculate volatile free mineral levels in rocks. | ||
| Location of | Accuracy and quality of surveys used to locate | Drill hole collar locations are determined using a handheld GPS with |
| data points | drill holes (collar and down‐hole surveys), | an accuracy of +/‐ 5m. |
| trenches, mine workings and other locations used in Mineral Resource estimation. |
Down hole surveys of dip and azimuth were conducted using a single shot camera every 30m to detect deviations of the hole from |
|
| the planned dip and azimuths. | ||
| Specification of the grid system used. | The grid system used is GDA94, MGA Zone 51. | |
| Quality and adequacy of topographic control. | Best estimated RLs were assigned during drilling and are to be | |
| corrected at a later stage. | ||
| Data spacing | Data spacing for reporting of Exploration | The drill programs target EM conductors and other high quality |
| and | Results. | targets for massive nickel sulphide mineralisation. The spacing and |
| distribution | distribution of holes is not relevant to these programs. | |
| Whether the data spacing and distribution is | Drilling is at the exploration stage. Mineralisation at the East |
|
| sufficient to establish the degree of geological | Laverton Property has not yet demonstrated to be sufficient in both |
|
| and grade continuity appropriate for the | geological and grade continuity appropriate for the Mineral |
|
| Mineral Resource and Ore Reserve estimation | Resource and Ore Reserve estimation procedure(s) and |
|
| procedure(s) and classifications applied. | classifications to be applied. | |
| Whether sample compositing has been applied. | Samples are taken at one metre lengths and adjusted where | |
| necessary to reflect local variations in geology or where visible | ||
| mineralised zones are encountered, in order to preserve the | ||
| samples as representative. | ||
| Orientation of | Whether the orientation of sampling achieves | The drill holes are drilled towards 060 at an angle of ‐60 degrees |
| data in relation | unbiased sampling of possible structures and | (unless otherwise stated) to intersect the modelled mineralised |
| to geological | the extent to which this is known, considering | zones at a near perpendicular orientation. However, the orientation |
| structure | the deposit type. | of key structures may be locally variable and any relationship to |
| mineralisation has yet to be identified. | ||
| If the relationship between the drilling | No orientation based sampling bias has been identified in the data | |
| orientation and the orientation of key | to date. | |
| mineralised structures is considered to have | ||
| introduced a sampling bias, this should be | ||
| assessed and reported if material. | ||
| Sample | The measures taken to ensure sample security. | Chain of Custody is managed by the Company until samples pass to |
| security | a duly certified assay laboratory for subsampling and assaying. The | |
| cut‐core trays and RC sample bags are stored on secure sites and | ||
| delivered to the assaylaboratorybythe Companyor a competent |
6
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| agent. When in transit, they are kept in locked premises. Transport | ||
| logs have been set up to track the progress of samples. The chain of | ||
| custody passes upon delivery of the samples to the assay laboratory. | ||
| Audits or | The results of any audits or reviews of sampling | Sampling techniques and procedures are regularly reviewed |
| reviews | techniques and data. | internally, as is data. To date, no external audits have been |
| completed on the drilling programme. |
Section 2 Reporting of Exploration Results (Criteria listed in section 1 will also apply to this section where relevant)
| Criteria JORC Code explanation |
Commentary |
|---|---|
| Mineral Tenement and Land Status Type, name/reference number, location and ownership including agreements or material issues with third parties including joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area. |
The East Laverton Property comprises 27 exploration licences, and details are available in the Company’s Quarterly Activities Report which can be found on our website at www.stgm.com.au. Each tenement is 100% owned by Desert Fox Resources Pty Ltd, a wholly owned subsidiary of St George Mining. Certain tenements are subject to a 2% Net Smelter Royalty in favour of a third party. None of the tenements are the subject of a native title claim. No environmentally sensitive sites have been identified at any of the tenements. The tenements are in good standing; no known impediments exist. |
| Exploration Done by Other Parties Acknowledgment and appraisal of exploration by other parties. |
In 2012, BHP Billiton Nickel West Pty Ltd (Nickel West) completed a reconnaissance RC (reverse circulation) drilling programme at the East Laverton Property as part of the Project Dragon farm‐in arrangement between Nickel West and the Company. That farm‐in arrangement has been terminated. The drilling programme comprised 35 RC holes for 8,560m drilled. The results from the Nickel West drilling programme were reported by the Company in its ASX Release dated 25 October 2012 “Drill Results at Project Dragon”. Drilling intersected primary nickel sulphide mineralisation and established the presence of fertile, high MgO ultramafic sequences at the East Laverton Property. Prior to the Project Dragon drilling programme, there was no systematic exploration for nickel sulphides at the East Laverton Property. Historical exploration in the region was dominated by shallow RAB and aircore drilling, much of which had been incompletely sampled, assayed, and logged. This early work was focused on gold rather than nickel sulphide exploration. |
| Geology Deposit type, geological setting and style of mineralisation |
The Company’s East Laverton Property located in the NE corner of the Eastern Goldfields Province of the Archean Yilgarn Craton. The project area is proximally located to the Burtville‐Yarmana terrane boundary and the paleo‐cratonic marginal setting is consistent with the extensive komatiites found on the property. The drilling at the East Laverton Property has confirmed extensive strike lengths of high‐MgO olivine‐rich rocks across three major ultramafic belts. Ultramafic rocks of this composition are known to host high grade nickel sulphides. |
| Drill hole information A summary of all information material to the understanding of the exploration results including tabulation of the following information for all Material drill holes: • Easting and northing of the drill hole collar •Elevation or RL (Reduced Level – elevation above sea level in meters) of the drill hole collar • Dip and azimuth of the hole |
Refer to information in the body of this announcement. Information regarding exploration results from Project Dragon can be found in the Company’s ASX Release dated 25 October 2012 “Drill Results at Project Dragon” which is available to view on www.stgm.com.au. Table 1 to this 2012 JORC Section contains drill hole information on |
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| Criteria | JORC Code explanation | Commentary | |
|---|---|---|---|
| • Down hole length and interception depth | DRAC35, DRAC38 and DDNRC002 which were the first drill holes at | ||
| • Hole length | the East Laverton Property to identify nickel sulphides. | ||
| Data | In reporting Exploration Results, weighting | No top‐cuts have been applied. A nominal 0.15% Ni lower cut‐off is | |
| aggregation | averaging techniques, maximum and/or |
applied unless otherwise indicated. | |
| methods | minimum grade truncations (e.g. cutting of | ||
| high grades) and cut‐off grades are usually | |||
| Material and should be stated. | |||
| Where aggregated intercepts incorporate short | High grade massive sulphide intervals internal to broader zones of | ||
| lengths of high grade results and longer | sulphide mineralisation are reported as included intervals. | ||
| lengths of low grade results, the procedure | |||
| used for such aggregation should be stated and | |||
| some typical examples of such aggregations | |||
| should be shown in detail. | |||
| The assumptions used for any reporting of | No metal equivalent values are used for reporting exploration | ||
| metal equivalent values should be clearly | results. | ||
| stated. | |||
| Relationship | These relationships are particularly important | The geometry of the mineralisation is not yet known due to | |
| between | in the reporting of exploration results. If the | insufficient deep drilling in the targeted area. | |
| mineralisation | geometry of the mineralisation with respect to | ||
| widths and | the drill hole angle is known, its nature should | ||
| intercept | be reported. If it is not known and only the | ||
| lengths | down hole lengths are reported, there should | ||
| be a clear statement to this effect. | |||
| Diagrams | Appropriate maps and sections (with scales) | Maps will be included with any announcement of any significant | |
| and tabulations of intercepts should be | discovery, following review of assay results from the drilling | ||
| included for any significant discovery being | programme. | ||
| reported. These should include, but not be | |||
| limited to a plane view of drill hole collar | |||
| locations and appropriate sectional views. | |||
| Balanced | Where comprehensive reporting of all |
A comprehensive report on recent drilling at the East Laverton | |
| Reporting | Exploration Results is not practical, |
Property can be found in the following ASX Releases that are | |
| representative reporting of both low and high | available on our website atwww.stgm.com.au: | ||
| grades and/or widths should be practiced to avoid misleading reporting of Exploration |
3 September 2014 ‘Nickel Sulphide Drilling – Update on Phase 1’ | ||
| Results. | 11 February 2015_‘St George Extends Nickel Sulphide Zone’_. | ||
| Other | Other exploration data, if meaningful and | All meaningful and material information has been included in the | |
| substantive | material, should be reported including (but not | body of the text. No metallurgical or mineralogical assessments | |
| exploration | limited to): geological observation; geophysical | have been completed. | |
| data | survey results; geochemical survey results; bulk | ||
| samples – size and method of treatment; | |||
| metallurgical test results; bulk density, |
|||
| groundwater, geotechnical and rock |
|||
| characteristics; potential deleterious or |
|||
| contaminating substances. | |||
| Further Work | The nature and scale of planned further work | A discussion of further exploration work is contained in the body of | |
| (e.g. tests for lateral extensions or depth | the ASX Release. | ||
| extensions or large – scale step – out drilling). | |||
| Diagrams clearly highlighting the areas of | |||
| possible extensions, including the main |
|||
| geological interpretations and future drilling | |||
| areas, provided this information is not | |||
| commercially sensitive. |
8
| HOLE ID | NORTHIN G (m) |
EASTIN G (m) |
DIP (deg) |
AZM (deg) |
DEPT H (m) |
FROM (m) |
TO (m) |
WIDTH (m) |
Ni (%) |
Cu (ppm) |
Pt+Pd (ppb) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DRAC35 | 6739401 | 527150 | ‐60 | 250 | 244 | 100 | 118 | 18 | 0.40 | 342 | 197 |
| 100 | 104 | 4 | 0.57 | 366 | 294 | ||||||
| 112 | 114 | 2 | 0.51 | 584 | 281 | ||||||
| DRAC38 | 6733696 | 530786 | ‐60 | 250 | 298 | 108 | 138 | 30 | 0.31 | 10 | 31 |
| 132 | 138 | 6 | 0.48 | 40 | 48 | ||||||
| 132 | 134 | 2 | 0.62 | 92 | 53 | ||||||
| DDNRC002 | 6742718 | 523717 | ‐60 | 59 | 246 | 53 | 60 | 7 | 0.54 | ||
| 53 | 55 | 2 | 1.08 |
Table 1 to 2012 JORC Section – Significant intersections in DRAC35, DRAC38 and DDNRC002.
These historical holes are the first identification of nickel sulphides at the East Laverton Property. For further details on DRAC35 and DRAC38, see the ASX Release dated 25 October 2012 “Drill Results at Project Dragon”. For further details on DDNRC002, see the ASX Release dated 11 April 2013 “St George Provides Exploration Update”. These ASX Releases are available to view on the Company’s website at www.stgm.om.au
9