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ARK MINES LIMITED — Capital/Financing Update 2017
Mar 2, 2017
64339_rns_2017-03-02_4d9eb8d6-01a6-4957-8108-b3f7c2253fc8.pdf
Capital/Financing Update
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Mt. Porter South Drilling Update
Sydney, 3 March 2017 : The Board of Ark Mines Ltd ( ASX: AHK ) is pleased to provide an update on the ongoing exploration activities on its Mt. Porter deposits in the Pine Creek region of the Northern Territory, Australia.
AHK has now completed the first phase of an RC program, comprising 27 holes (and 948m), targeting the Mt Porter South deposit. The purpose of this work is to supplement the Mt. Porter Central deposit.
The drill programme was designed in November 2016 after investigation of the historic drill data set indicated there may be some potential for near surface gold deposits within 200m along strike of the Mt. Porter pit design within ML23839, to both North and South.
Drilling results and analysis to date indicate the Mt. Porter South deposit is shallow and is likely to have a low strip ratio when mined. Furthermore, it is expected to be predominately oxide and should have higher recoveries.
The indications for the southern zone, based wholly on the historic reconnaissance scale drill grid at an intermittent and incomplete 50m by 50m spacing, was a good probability of mineralisation over a strike length of 700m with a width varying between 4 and 10m and a grade tenor in the range of 1.3 g/t Au.
For the northern zone were there remains insufficient data to predict grade tenor. A more difficult, extensive and deeper drill programme will be required to delineate viable portions of this structurally more complex zone.
AHK has determined the initial programme should concentrate on drilling the southern zone to afford a small resource sufficient to allow an MMP amendment and mining, with this oxide ore stream potentially available to offset pre-strip costs in the designed pit, now referred to as Mt. Porter Central.
Historic reports indicated that the original drilling had been spatially controlled using dGPS. This technology affords an accuracy of 2m in x and y, and 4m in z. On this basis a tight, nonfence based resource programme was designed to infill the known mineralisation bounds and allow 5m to 8m of spatial uncertainty.
The initial drill programme comprised 89 holes for 3,073m however, 9 holes for 360m were cancelled based on their extension of the mineralisation into ELR116, which would complicate regulatory approval of any subsequent mining. The remaining 80 holes constituted an expected 2,713m of drilling on 29 lines; each line having between 1 and 4 holes, averaging 3 holes per line with many pads to encompass 2 holes for a total of 62 pads. Designed depths ranged from 20 to 55m with average depth being 34m.
Deductions drawn from the drilling results so far:-
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Results have shown that ore is narrower than expected, with most lode sections falling between 2 to 4m in thickness. The grade tenor in many areas is, however, higher than expected, with many lode sections grading above 1.5 g/t Au rather than the expected 1.3g/t Au.
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The results give a strong indication AHK has a commercial, shallow oxide pit, mineable after Mt. Porter Central.
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Grade and tonnes will be concluded after the completion of the second phase of drilling.
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AHK is aiming to commence mining Mt. Porter Central in Q2 2017 and intends to lodge (and have approved) as soon as is practicable an MMP for South, so it can be mined directly after Central.
Figure 1: Drill rig on Mount Porter South
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| Aggregated Stage 1 Significant Intercept Table | Aggregated Stage 1 Significant Intercept Table | Aggregated Stage 1 Significant Intercept Table | Aggregated Stage 1 Significant Intercept Table | Aggregated Stage 1 Significant Intercept Table | Aggregated Stage 1 Significant Intercept Table | Aggregated Stage 1 Significant Intercept Table | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BHID | Easting (m) |
Northing (m) |
Elevation (m) |
Azimuth (degrees) |
Dip (degrees) |
EOH (m) |
Method | From (m) |
To (m) |
Interval (m) |
True Thickness (m) |
Au Grade g/t Au |
| MPRC267 | 10144.866 | 10076.095 | 507.977 | 89.341 | 60.3 | 32 | RC | 6 | 7 | 1 | 0.96 | 0.83 |
| MPRC269 | 10134.011 | 10049.943 | 513.746 | 89.841 | 60.3 | 20 | RC | 3 | 4 | 1 | 0.97 | 1.04 |
| MPRC270 | 10119.217 | 10049.981 | 514.397 | 89.341 | 60.5 | 32 | RC | 14 | 17 | 3 | 2.85 | 0.96 |
| including | 14 | 16 | 2 | 1.91 | 1.42 | |||||||
| MPRC271 | 10127.849 | 10028.146 | 516.368 | 90.341 | 60.5 | 23 | RC | 8 | 13 | 5 | 4.74 | 1.19 |
| including | 10 | 13 | 3 | 2.81 | 1.48 | |||||||
| MPRC272 | 10115.304 | 10028.136 | 517.059 | 90.341 | 60.0 | 35 | RC | 8 | 9 | 1 | 0.91 | 2.98 |
| MPRC272 | 10115.304 | 10028.136 | 517.059 | 90.341 | 60.0 | 35 | RC | 17 | 22 | 5 | 4.88 | 2.13 |
| including | 17 | 19 | 2 | 2.98 | 4.48 | |||||||
| MPRC272 | 10115.304 | 10028.136 | 517.059 | 90.341 | 60.0 | 35 | RC | 31 | 32 | 1 | 0.90 | 0.73 |
| MPRC273 | 10106.765 | 10028.109 | 517.951 | 89.841 | 78.0 | 35 | RC | 21 | 24 | 3 | 2.16 | 2.12 |
| MPRC273 | 10106.765 | 10028.109 | 517.951 | 89.841 | 78.0 | 35 | RC | 33 | 34 | 1 | 0.80 | 0.68 |
| MPRC274 | 10106.74 | 10005.19 | 517.513 | 90.841 | 61.0 | 32 | RC | 3 | 4 | 1 | 0.84 | 0.50 |
| MPRC274 | 10106.74 | 10005.19 | 517.513 | 90.841 | 61.0 | 32 | RC | 28 | 31 | 3 | 3.00 | 0.66 |
| including | 30 | 31 | 1 | 1.00 | 1.25 | |||||||
| MPRC275 | 10091.73 | 9982.28 | 516.389 | 90.341 | 60.0 | 26 | RC | 12 | 17 | 5 | 4.34 | 4.13 |
| including | 14 | 16 | 2 | 1.80 | 8.95 | |||||||
| MPRC275 | 10091.73 | 9982.28 | 516.389 | 90.341 | 60.0 | 26 | RC | 20 | 21 | 1 | 0.92 | 2.33 |
| MPRC275 | 10091.73 | 9982.28 | 516.389 | 90.341 | 60.0 | RC | 23 | 25 | 2 | 1.64 | 1.30 | |
| including | 24 | 25 | 1 | 0.82 | 1.92 | |||||||
| MPRC276 | 10075.803 | 9982.024 | 520.929 | 36 | 89.6 | 60.75 | RC | 3 | 4 | 1 | 0.82 | 0.75 |
| MPRC276 | 10075.803 | 9982.024 | 520.929 | 36 | 89.6 | 60.75 | RC | 16 | 17 | 1 | 0.82 | 0.71 |
| MPRC276 | 10075.803 | 9982.024 | 520.929 | 36 | 89.6 | 60.75 | RC | 18 | 19 | 1 | 0.82 | 0.96 |
| MPRC276 | 10075.803 | 9982.024 | 520.929 | 36 | 89.6 | 60.75 | RC | 21 | 23 | 2 | 1.87 | 0.74 |
| MPRC276 | 10075.803 | 9982.024 | 520.929 | 36 | 89.6 | 60.75 | RC | 31 | 34 | 3 | 2.77 | 0.98 |
| including | 31 | 32 | 1 | 0.82 | 2.25 | |||||||
| MPRC277 | 10074.775 | 9982.02 | 520.979 | 35 | 89.6 | 76.75 | RC | 26 | 27 | 1 | 0.82 | 1.84 |
| MPRC279 | 10050.33 | 9952.412 | 528.994 | 90.341 | 60.0 | 38 | RC | 7 | 11 | 4 | 3.60 | 1.63 |
| including | 8 | 10 | 2 | 1.80 | 2.54 | |||||||
| MPRC279 | 10050.33 | 9952.412 | 528.994 | 90.341 | 60.0 | 38 | RC | 29 | 30 | 1 | 0.95 | 0.59 |
| MPRC280 | 10049.47 | 9952.503 | 529.053 | 90.341 | 75.8 | 53 | RC | 45 | 47 | 2 | 1.48 | 2.64 |
| MPRC280 | 10049.47 | 9952.503 | 529.053 | 90.341 | 75.8 | 53 | RC | 50 | 53 | 3 | 2.59 | 0.53 |
| MPRC282 | 10039.62 | 9927.985 | 530.63 | 89.841 | 89.8 | 60 | RC | 16 | 17 | 1 | 0.96 | 0.50 |
| MPRC283 | 10039.62 | 9927.985 | 530.63 | 89.841 | 80.5 | 40 | RC | 7 | 13 | 6 | 4.67 | 0.95 |
| including | 8 | 9 | 1 | 0.78 | 1.73 | |||||||
| MPRC283 | 10039.62 | 9927.985 | 530.63 | 89.841 | 80.5 | 40 | RC | 14 | 26 | 12 | 9.60 | 1.05 |
| MPRC285 | 10031.79 | 9900.684 | 529.41 | 90.841 | 60.2 | 45 | RC | 13 | 19 | 6 | 5.38 | 1.31 |
| including | 17 | 19 | 2 | 1.79 | 1.98 | |||||||
| MPRC285 | 10031.79 | 9900.684 | 529.41 | 90.841 | 60.2 | 45 | RC | 40 | 42 | 2 | 0.90 | 0.54 |
| MPRC287 | 10004.44 | 9873.003 | 529.921 | 90.841 | 60.2 | 50 | RC | 15 | 16 | 1 | 0.90 | 0.67 |
| MPRC288 | 10004.44 | 9873.003 | 529.921 | 90.841 | 80.5 | 70 | RC | 38 | 40 | 2 | 0.90 | 0.59 |
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 1 | 5 | 4 | 3.97 | 1.49 |
| including | 2 | 4 | 2 | 1.99 | 2.18 | |||||||
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 10 | 14 | 4 | 3.97 | 1.84 |
| including | RC | 11 | 13 | 2 | 1.99 | 3.01 | ||||||
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 21 | 22 | 1 | 0.99 | 0.69 |
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 25 | 29 | 4 | 3.92 | 0.87 |
| including | RC | 26 | 27 | 1 | 0.98 | 1.76 | ||||||
| 3 |
| BHID | Easting (m) |
Northing (m) |
Elevation (m) |
Azimuth (degrees) |
Dip (degrees) |
EOH (m) |
Method | From (m) |
To (m) |
Interval (m) |
True Thickness (m) |
Au Grade g/t Au |
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 30 | 31 | 1 | 0.98 | 0.52 |
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 33 | 36 | 3 | 3.00 | 1.68 |
| including | RC | 33 | 35 | 2 | 2.00 | 2.24 | ||||||
| MPRC301 | 9924.111 | 9753.532 | 529.49 | 90.841 | 60.3 | 41 | RC | 40 | 41 | 1 | 0.98 | 0.63 |
| MPRC304 | 9915.898 | 9722.495 | 527.511 | 90.591 | 60.3 | 38 | RC | 27 | 31 | 4 | 3.79 | 0.62 |
| MPRC304 | 9915.898 | 9722.495 | 527.511 | 90.591 | 60.3 | 38 | RC | 35 | 38 | 3 | 2.93 | 1.86 |
| including | 35 | 36 | 1 | 0.98 | 2.02 | |||||||
| MPRC306 | 9909.777 | 9692.674 | 525.844 | 89.841 | 60.3 | 35 | RC | 13 | 15 | 2 | 1.96 | 1.27 |
| including | 13 | 14 | 1 | 0.98 | 1.99 | |||||||
| MPRC313 | 9933.659 | 9643.258 | 517.973 | 89.841 | 60.3 | 40 | RC | 25 | 28 | 3 | 2.71 | 1.29 |
| including | 25 | 27 | 2 | 1.81 | 1.62 | |||||||
| MPRC313 | 9933.659 | 9643.258 | 517.973 | 89.841 | 60.3 | 40 | RC | 33 | 35 | 2 | 1.75 | 0.91 |
| including | 33 | 34 | 1 | 0.88 | 1.24 | |||||||
| MPRC315 | 9934.165 | 9616.902 | 516.679 | 89.841 | 60.3 | 41 | RC | 20 | 22 | 2 | 1.86 | 0.83 |
| MPRC315 | 9934.165 | 9616.902 | 516.679 | 89.841 | 60.3 | 41 | RC | 26 | 29 | 3 | 2.73 | 1.28 |
| including | 26 | 28 | 2 | 1.82 | 1.61 | |||||||
| 4 |
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Figure 2 : Mount Porter South drill programme. Red are planned holes. Dark blue are historic holes. Turquoise lines are lines including new drilling. The brown shape to the north is the Mount Porter Central design C pit shell. The pink line to the east is the Allamber Springs Granite.
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About Ark Mines
AHK is a Sydney based company now readying itself for near term gold production, from assets in the Northern Territory. The company’s aim is to establish itself as a medium level gold producer producing gold from tenements in the Northern Territory, developing prospective tenements in the Northern Territory and to acquire other prospective gold projects in Australia.
FURTHER INFORMATION:
Roger Jackson, Managing Director, Ark Mines Limited: +61400 408 550
The information in this announcement that relates to Exploration Results, Mineral Resources or Ore Reserves has been compiled by Roger Jackson BSc, Grad Dip Fin Man, Dip Ed, AICD, who is a Member of The Australasian Institute of Mining and Metallurgy and who has more than five years’ experience in the field of activity being reported on. Mr Jackson is a director of the Company. Mr Jackson 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 to qualify as a Competent Person as defined in the 2012 Edition of ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Jackson consents to the inclusion in the announcement of the matters based on his information in the form and context in which it appears.
JORC Code, 2012 Edition – Table 1 – Mt Porter South Prospect – ML23839 – Reverse Circulation Drilling Results - JORC 2012
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
| Criteria | JORC Code explanation | JORC Code explanation | Commentary | Commentary |
|---|---|---|---|---|
| Sampling | | Nature and quality of sampling (eg cut channels, | | Reverse Circulation (RC) drilling was carried out on the current |
| techniques | random chips, or specific specialised industry | program with drill cuttings collected every one metre. | ||
| standard measurement tools appropriate to the | | Cuttings were passed through a levelled cyclone and attached | ||
| minerals under investigation, such as down hole | adjustable cone splitter in order to obtain a representative | |||
| gamma sondes, or handheld XRF instruments, | sample and a representative duplicate, each weighing | |||
| etc). These examples should not be taken as | approximately 3kg, and both collected in pre-numbered calico | |||
| limiting the broad meaning of sampling. | bags for each metre drilled. | |||
| | Include reference to measures taken to ensure | | All primary samples were submitted to the laboratory, | |
| sample representivity and the appropriate | pulverised to produce a 50g charge for fire assay and then | |||
| calibration of any measurement tools or systems | analysed for gold by AAS. Standards and duplicates were not | |||
| used. | inserted into the original sample sequence but instead industry | |||
| | Aspects of the determination of mineralisation that | standard certified Gannett standards for a range of values | ||
| are Material to the Public Report. | between 0.099 and 12.38 ppm Au were used with each | |||
| | In cases where ‘industry standard’ work has been | laboratory job, included at the end of each sample sequence | ||
| done this would be relatively simple (eg ‘reverse | submitted, at a rate of 1 in 25. | |||
| circulation drilling was used to obtain 1 m | | Primary samples were selected for pycnometer SG assay at a | ||
| samples from which 3 kg was pulverised to | rate of 1:5 with selection based on logged rock type and | |||
| produce a 30 g charge for fire assay’). In other | oxidation state to ensure coverage of all potential domains. | |||
| cases more explanation may be required, such as | |
Each sample collected was noted qualitatively for moisture | ||
| where there is coarse gold that has inherent | content with the vast majority of samples collected being | |||
| sampling problems. Unusual commodities or | essentially dry. | |||
| mineralisation types (eg submarine nodules) may | | Following receiving assay results, duplicate samples were | ||
| warrant disclosure of detailed information. | selected from the retained duplicate set for the full range of the | |||
| assay values noted. These duplicates were submitted for | ||||
| assay at a rate of 1 in 25. | ||||
| Drilling | | Drill type (eg core, reverse circulation, open-hole | | WJ Drilling was contracted to undertake RC drilling using a |
| techniques | hammer, rotary air blast, auger, Bangka, sonic, | Gemco RC rig and auxiliary air compressor. | ||
| etc) and details (eg core diameter, triple or | | Drilling was completed using a 4 inch (10.16cm) face sampling | ||
| standard tube, depth of diamond tails, face- | hammer. | |||
| sampling bit or other type, whether core is | | RC drilling was inclined (refer Table 1 for details). |
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| Criteria | JORC Code explanation | JORC Code explanation | Commentary | Commentary | ||
|---|---|---|---|---|---|---|
| _oriented and if so, by what method, etc). _ | ||||||
| Drill | sample | | Method of recording and assessing core and chip | | A visual estimate of percentage recovery by volume was made | |
| recovery | sample recoveries and results assessed. | for each metre drilled, and periodically checked by weight | ||||
| | Measures taken to maximise sample recovery | using a spring balance. | ||||
| and ensure representative nature of the samples. | | Each sample was qualitatively logged for moisture content and | ||||
| | Whether a relationship exists between sample | sample size consistency of the smaller calico bag sample | ||||
| recovery and grade and whether sample bias may | continuously monitored while drilling, with periodic weighing of | |||||
| have occurred due to preferential loss/gain of | primary and duplicate sample using a spring balance. | |||||
| fine/coarse material. | | Cyclone and splitter were clean at 6m intervals or less if visual | ||||
| inspection indicated potential for contamination. | ||||||
| | Rig air was used to blow the hole dry and evacuate the sample | |||||
| path of particulates and sample residue at the commencement | ||||||
| of each drill metre, prior to drilling and sampling that metre. | ||||||
| | This phase of drilling is follow-up to previous drilling carried out | |||||
| in 2004 utilising a smaller drilling rig and sample composite | ||||||
| length, so it is problematic to make full comparisons from this | ||||||
| phase of drilling. This problem of statistical representation will | ||||||
| be addressed by completion of the current programme which | ||||||
| will provide a statistically valid data set covering the entire | ||||||
| mineralised zone at the current improved level of | ||||||
| representation. | ||||||
| Logging | | Whether core and chip samples have been | | All drill cuttings qualitatively logged and representative cuttings | ||
| geologically and geotechnically logged to a level | collected in numbered sequential chip trays on one metre | |||||
| of detail to support appropriate Mineral Resource | intervals. | |||||
| estimation, mining studies and metallurgical | | Qualitative logging includes colour, lithology, description, | ||||
| studies. | weathering, alteration, key mineralogy, and mineralisation. | |||||
| | Whether logging is qualitative or quantitative in | Water table depths and key weathering marker horizons also | ||||
| nature. Core (or costean, channel, etc) | recorded. | |||||
| photography. | | Each hole has been logged by the metre over the entire | ||||
| | The total length and percentage of the relevant | interval drilled. | ||||
| intersections logged. | ||||||
| Sub-sampling | | If core, whether cut or sawn and whether quarter, | | See sampling section for a description of sampling and | ||
| techniques | and | half or all core taken. | duplicate sampling techniques. | |||
| sample | | If non-core, whether riffled, tube sampled, rotary | | Simultaneous duplicate samples were taken for each drill | ||
| preparation | split, etc and whether sampled wet or dry. | metre using the same levelled cone splitting method as | ||||
| | For all sample types, the nature, quality and | primary samples. | ||||
| appropriateness of the sample preparation | | Duplicate sample results for a range of assay values at a rate | ||||
| technique. | of 1 in 25, indicate that original assay results are largely | |||||
| | Quality control procedures adopted for all sub- | reproducible, with no obvious sample bias. | ||||
| sampling stages to maximise representivity of | | Laboratory repeats were also performed at a rate of 1 in 25 | ||||
| samples. | and for all samples with an assay result above 0.5 ppm Au and | |||||
| | Measures taken to ensure that the sampling is | show a high level of repeatability. | ||||
| representative of the in situ material collected, | | The nature, quality and appropriateness of the sampling | ||||
| including for instance results for field | technique are considered adequate for the style of | |||||
| duplicate/second-half sampling. | mineralisation. | |||||
| | Whether sample sizes are appropriate to the grain | |
Sample sizes are considered appropriate for the very fine | |||
| size of the material being sampled. | grained nature of the host lithologies and grain size of the gold | |||||
| mineralisation intersected. | ||||||
| Quality of | assay | | The nature, quality and appropriateness of the | | A certified and accredited laboratory, North Australian | |
| data | and | assaying and laboratory procedures used and | Laboratories (NAL) was used for the current assays and is the | |||
| laboratory | tests | whether the technique is considered partial or | same laboratory used by the previous explorers. | |||
| total. | | Samples were analysed utilising the industry standard fire | ||||
| | For geophysical tools, spectrometers, handheld | assay technique using a 50g charge and AAS finish (0.01ppm | ||||
| XRF instruments, etc, the parameters used in | detection limit). All assays over 0.5 ppm have been routinely | |||||
| determining the analysis including instrument | re-assayed at least once and in some cases twice to establish | |||||
| make and model, reading times, calibrations | acceptable levels of accuracy and precision. | |||||
| factors applied and their derivation, etc. | | Internal certified QA/QC is carried out by NAL. In addition, | ||||
| | Nature of quality control procedures adopted (eg | industry standard Gannett standards for a range of values | ||||
| standards, blanks, duplicates, external laboratory | were used with each laboratory job, included at the end of | |||||
| checks) and whether acceptable levels of | each sample sequence, and blank flush material was ground | |||||
| accuracy (i.e. lack of bias) and precision have | between each sample, with these assayed at the beginning | |||||
| been established. | and end of each sample sequence. | |||||
| Verification | of | | The verification of significant intersections by | | Primary data is verified on paper reports certified by the | |
| sampling | and | either independent or alternative company | laboratory and validated against laboratory produced CSV | |||
| assaying | personnel. | files, and significant intersections initially calculated by direct | ||||
| | The use of twinned holes. | reference to the drill logs produced in the field. The data is | ||||
| | Documentation of primary data, data entry | then entered into Excel spreadsheets for further processing | ||||
| procedures, data verification, data storage | and cross validation checks with results independently verified | |||||
| (physical and electronic) protocols. | byalternative company personnel at thepre-modellingstage. |
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| Criteria | JORC Code explanation | JORC Code explanation | Commentary | Commentary | |
|---|---|---|---|---|---|
| | Discuss any adjustment to assay data. | | No adjustment has been made to the data except replacing L | ||
| for gold assays <0.01ppm with a numerical value of 0.005; | |||||
| representing half the analytical detection limit. | |||||
| | No averaging or exchange of data between replicates and | ||||
| duplicates has been implemented, and all calculation and | |||||
| reporting of assays is based on the primary assay data set. | |||||
| | Calculation of assay grades of significant intersections is by | ||||
| length weighted average of primary assay grades within the | |||||
| intersection. | |||||
| | True thickness is estimated by cross sectional interpretation of | ||||
| the logged data in CAD software, perpendicular to interpreted | |||||
| lode, and reported in parallel with the down hole interval length | |||||
| of the intersection. | |||||
| Location of data | | Accuracy and quality of surveys used to locate | | All co-ordinates are recorded in GDA94 MGA Zone 52 and | |
| points | drill holes (collar and down-hole surveys), | converted to local mine grid for use in CAD software, via high | |||
| trenches, mine workings and other locations used | precision survey based transform, by qualified and | ||||
| in Mineral Resource estimation. | experiences surveyors. | ||||
| | Specification of the grid system used. | | Drill hole pegs were set out by qualified and experienced | ||
| | Quality and adequacy of topographic control. | surveyors using RTKdGPS for a precision of ± 20mm in x and | |||
| y, and 20cm in z. | |||||
| | Drill hole collars were picked up after drilling by qualified and | ||||
| experienced surveyors using RTKdGPS for a precision of ± | |||||
| 20mm in x and y, and 20cm in z. | |||||
| | All drill holes underwent down hole survey for azimuth, dip and | ||||
| magnetic field strength through the rod string, utilising a Reflex | |||||
| digital down hole tool, positioned centrally within 4m of | |||||
| stainless steel rod to prevent magnetic interference. Holes of | |||||
| length less than 30m had survey shots taken at the end of | |||||
| hole. Holes longer then 30m had survey shots taken at end of | |||||
| hole and 20m intervals to a minimum depth of 20m. This is | |||||
| considered adequate for the depth, style and scope of | |||||
| mineralisation, and the short length of holes drilled. | |||||
| | Historic drillholes were spatially controlled by dGPS for a | ||||
| spatial precision of ± 2m in x and y, and 4m in z. Where noted | |||||
| in the field, some of these collars were picked up and validated | |||||
| by RTKdGPS. | |||||
| | Topographic control was provided at the commencement of | ||||
| this phase of drilling by generation of a ground digital terrain | |||||
| model measured and constructed by experienced and qualified | |||||
| surveyors, using RTKdGPS, over an area three times greater | |||||
| than the drill field and wholly encompassing the mineralisation | |||||
| and its surrounds. This topographic model represents industry | |||||
| best practice and when combines with individual collar | |||||
| surveys, is adequate for the style and scope of mineralisation. | |||||
| Data spacing and | | Data spacing for reporting of Exploration Results. | | Line spacings between drilling lines is 25m ±2m depending on | |
| distribution | | Whether the data spacing and distribution is | topographic interference. This is considered adequate at this | ||
| sufficient to establish the degree of geological and | stage of project development and is in line with that used and | ||||
| grade continuity appropriate for the Mineral | statistically validated in other similar deposits in the area. | ||||
| Resource and Ore Reserve estimation | | Spacing between holes within a line varies from 12 to 25m with | |||
| procedure(s) and classifications applied. | hole inclinations adjusted to target passes through the | ||||
| | Whether sample compositing has been applied. | mineralised zone with a down dip separation of 10m, including | |||
| existing passes from historic holes. This is considered to be | |||||
| high resolution sampling at the current stage of project | |||||
| development, and is in line with optimal spacings determined | |||||
| from statistical analysis of other similar deposits in the area. | |||||
| | It is considered that the data spacing in the current drilling | ||||
| program will allow for the consideration of a JORC Mineral | |||||
| Resource to be calculated for this deposit. | |||||
| | No sample compositing has been carried out for the current | ||||
| program. | |||||
| Orientation | of | | Whether the orientation of sampling achieves | | The drilling program has been designed to intersect a |
| data in relation to | unbiased sampling of possible structures and the | moderately west dipping (approx. 60°) structure with easterly | |||
| geological | extent to which this is known, considering the | directed holes at inclinations of either 60° to 78° and it is | |||
| structure | deposit type. | considered that this provides a consistent unbiased result in | |||
| | If the relationship between the drilling orientation | conjunction with intercept spacing on section. | |||
| and the orientation of key mineralised structures | | As the drilling orientation has been consistent and the lode | |||
| is considered to have introduced a sampling bias, | orientation also predictable at this stage of exploration it is not | ||||
| this should be assessed and reported if material. | considered that a sampling bias has been introduced. |
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| Criteria | JORC Code explanation | JORC Code explanation | Commentary | Commentary |
|---|---|---|---|---|
| Sample security | | The measures taken to ensure sample security. | | Sample intervals sent to the laboratory have been collected in |
| individually numbered calico bags and then loaded into large | ||||
| plastic bags annotated with the sample sequence to exclude | ||||
| moisture. These bags have then been transported directly | ||||
| from the drill site to the NAL laboratory in Pine Creek by Ark | ||||
| Mines (AHK) contract personnel. | ||||
| | Retained coarse residue and assay pulps are currently | |||
| securely stored at the NAL laboratory in Pine Creek. | ||||
| | Retained duplicates samples are stored away from the working | |||
| area in a bag farm on site in large plastic bags. | ||||
| Audits or reviews | |
The results of any audits or reviews of sampling | | No audits or reviews undertaken at this stage of the |
| techniques and data. | exploration program. |
Section 2 Reporting of Exploration Results
| (Criteria | (Criteria | listed in theprecedingsection also applyto this section.) | listed in theprecedingsection also applyto this section.) | listed in theprecedingsection also applyto this section.) | listed in theprecedingsection also applyto this section.) |
|---|---|---|---|---|---|
| Criteria | JORC Code explanation | Commentary | |||
| Mineral tenement | | Type, reference name/number, location and | | All results pertaining to the current program are from | |
| and land | tenure | ownership including agreements or material | ML23839, held by Ark Mines Ltd (AHK). . | ||
| status | issues with third parties such as joint ventures, | | ML23839 is located on PL 815/ NT Portion 1630 Mary River | ||
| partnerships, overriding royalties, native title | West Station. | ||||
| interests, historical sites, wilderness or national | | AHK has consulted with the pastoralist and the Traditional | |||
| park and environmental settings. | Owners (TOs) of ML23839, the Jaywon People on cultural | ||||
| | The security of the tenure held at the time of | heritage and the TOs have been kept informed of exploration | |||
| reporting along with any known impediments to | activities carried out by AHK. | ||||
| obtaining a licence to operate in the area. | |||||
| Exploration | done | | Acknowledgment and appraisal of exploration by | | The last phase of exploration work has been carried out by |
| by other parties | other parties. | Arafura Resources (ARU) and comprised RC drilling between | |||
| 2003 and 2006. Prior to this, extensive drilling was carried out | |||||
| by Renison Goldfields Consolidated (RGC) between 1988 and | |||||
| 1994, and some further drilling was carried out by Homestake | |||||
| Gold Australia between 1995 and 1997. Existing drilling prior | |||||
| to the current AHK programme totals approximately 19,626m | |||||
| and is referred to as historic drilling in this announcement. | |||||
| Geology | | Deposit type, geological setting and style of | | The drilling has targeted moderately west dipping, south south- | |
| mineralisation. | westerly striking sulphidic quartz lodes and clay mica chlorite | ||||
| alteration zones occurring as semi-conformable saddles with a | |||||
| width of 2 to 10m, emplaced on the west limb of the tight to | |||||
| isoclinal Mt Porter Anticline near the contact between the | |||||
| middle Koolpin formation meta-pelites and an overlying Zamu | |||||
| Dolerite sill, as a result of the rheology contrast between these | |||||
| stratigraphic units and mesothermal genetic fluids enhanced | |||||
| by thermal pumping from the nearby Allamber Springs Granite. | |||||
| The deposit is a Palaeoproterozoic thermal aureole gold | |||||
| system with predominantly mesothermal input and deposition | |||||
| as saddle and shear lodes is controlled physically by structure | |||||
| and competence contrast, and influenced chemically by | |||||
| carbonate and ferruginous (BIF) horizons within the pelitic | |||||
| Koolpin sediment pile. | |||||
| Drill | hole | | A summary of all information material to the | | All drillhole information is retained in the AHK database and |
| Information | understanding of the exploration results including | full drillhole details are shown in Table 1 accompanying this | |||
| a tabulation of the following information for all | document. | ||||
| Material drill holes: | | No material information is excluded. | |||
oeasting and northing of the drill hole collar |
|||||
oelevation or RL (Reduced Level – elevation |
|||||
| above sea level in metres) of the drill hole | |||||
| collar | |||||
odip and azimuth of the hole |
|||||
odown hole length and interception depth |
|||||
ohole length. |
|||||
| | If the exclusion of this information is justified on | ||||
| the basis that the information is not Material and | |||||
| this exclusion does not detract from the | |||||
| understanding of the report, the Competent |
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| Criteria | JORC Code explanation | JORC Code explanation | Commentary | Commentary | |
|---|---|---|---|---|---|
| Person should clearly explain why this is the | |||||
| case. | |||||
| Data aggregation | | In reporting Exploration Results, weighting | | In reporting of mineralised intercepts quoted in this | |
| methods | averaging techniques, maximum and/or minimum | announcement, these are shown without top cuts, using | |||
| grade truncations (eg cutting of high grades) and | standard length weighted averaging techniques with a | ||||
| cut-off grades are usually Material and should be | maximum internal dilution of two metres, non- consecutive for | ||||
| stated. | mineralised intervals stated > 0.5 g/t gold. | ||||
| | Where aggregate intercepts incorporate short | | Higher grade results, generally over 1-2m lengths within longer | ||
| lengths of high grade results and longer lengths of | lengths of lower grade results are indicated where considered | ||||
| low grade results, the procedure used for such | significant (refer Tables 1). | ||||
| aggregation should be stated and some typical | | There are no metal equivalents reported. | |||
| examples of such aggregations should be shown | |||||
| in detail. | |||||
| | The assumptions used for any reporting of metal | ||||
| equivalent values should be clearly stated. | |||||
| Relationship | | These relationships are particularly important in | | Intervals quoted are downhole widths at the drillholes angles | |
| between | the reporting of Exploration Results. | reported (60˚to 78˚), to intersect moderately dipping (55˚to | |||
| mineralisation | | If the geometry of the mineralisation with respect | 65˚) lode structures (refer Table 1). | ||
| widths and intercept lengths |
to the drill hole angle is known, its nature should be reported. |
| True thicknesses reported are estimated by cross sectional interpretation of the assays and logged data in Datamine RM |
||
| | If it is not known and only the down hole lengths | CAD software, perpendicular to interpreted lode, and reported | |||
| are reported, there should be a clear statement to | in parallel with the down hole interval length of the intersection. | ||||
| this effect (eg ‘down hole length, true width not | | The geometry of the mineralisation relative to drillhole angle is | |||
| known’). | approximately perpendicular to ±15˚, and drill hole orientations | ||||
| are reported in table 1. | |||||
| Diagrams | | Appropriate maps and sections (with scales) and | | See text figures showing drillhole locations. | |
| tabulations of intercepts should be included for | |||||
| any significant discovery being reported These | |||||
| should include, but not be limited to a plan view of | |||||
| drill hole collar locations and appropriate sectional | |||||
| views. | |||||
| Balanced | | Where comprehensive reporting of all Exploration | | Table 1 accompanying this document also describes targeted | |
| reporting | Results is not practicable, representative | sub-economic mineralised gold intercepts from the most recent | |||
| reporting of both low and high grades and/or | drilling program. | ||||
| widths should be practiced to avoid misleading | |||||
| reporting of Exploration Results. | |||||
| Other substantive | | Other exploration data, if meaningful and material, | |
Earlier drill, rock chip and soil sampling results have been | |
| exploration data | should be reported including (but not limited to): | incorporated into targeting the current drilling. | |||
| geological observations; geophysical survey | | From targeting shallow, easily mineable gold mineralisation the | |||
| results; geochemical survey results; bulk samples | depth of partial oxidation has been observed down to 35-45m | ||||
| – size and method of treatment; metallurgical test | vertical depth. | ||||
| results; bulk density, groundwater, geotechnical | | Water table is variable depending on topographic height but | |||
| and rock characteristics; potential deleterious or | generally in the range of 20-35m downhole depth. | ||||
| contaminating substances. | | Earlier surface rock chip and drill results averaged 1.3g/t gold | |||
| Further work | | The nature and scale of planned further work (eg | | Figure 2 shows the extent of completed and planned drilling in | |
| tests for lateral extensions or depth extensions or | the current programme, and a further 2000m of drilling is | ||||
| large-scale step-out drilling). | planned for 2017. | ||||
| | Diagrams clearly highlighting the areas of | | Desktop work to develop a modelled JORC resource is | ||
| possible extensions, including the main geological | planned to follow completion of the current drill programme, as | ||||
| interpretations and future drilling areas, provided | the precedent step to defining a reserve. | ||||
| this information is not commercially sensitive. |
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