High Grade Molyhil bulk sample assay results
6 June 2019
HIGH GRADE MOLYHIL BULK SAMPLE ASSAY RESULTS
The Board of Thor Mining Plc ("Thor") (AIM, ASX: THR) is pleased to announce positive assay results from metallurgical bulk sample drilling at the company's wholly owned Molyhil tungsten molybdenum deposit, in the Northern Territory of Australia.
Two PQ (85mm) diamond drill holes were drilled down plunge of the Yacht Club lode to obtain material for production of tungsten and molybdenum concentrate samples for prospective project offtake partners.
Highlight
· 92.6 metres @ 1.0% WO₃ (tungsten trioxide), 0.16% Mo (molybdenum) and 0.13% Cu (copper) from surface, including 2.2 metres of unmineralised granite from 11.5m;
Only one of the two holes have been assayed with the other to be kept in storage. The holes will not contribute to the mineral resource estimate.
Mick Billing, Executive Chairman, commented:
"This bulk sample assay result is very encouraging for the Molyhil project."
"It is rewarding to see confirmation of extensive high-grade scheelite mineralisation along with expected grades of molybdenum. It is also very pleasing to see the copper mineralisation at potentially economic levels".
"While the hole design was for the purpose of collecting material most likely to produce sufficient concentrate, rather than for resource purposes, the high-grade nature of the scheelite mineralisation provides further substantial confidence in the Molyhil deposit"
"Additionally, copper, while part of historic mineral resource estimates at Molyhil, has not been included in the resource estimate for some time, however recent testwork has shown encouraging results for production of a separate saleable concentrate. While this work has implications for potential production from the nearby Bonya deposits, it is expected to also apply to any copper mineralisation extracted at Molyhil"
"Since acquiring the Bonya properties, ongoing studies on the combined Molyhil-Bonya project have identified the copper potential of Bonya and its potential suitability for processing at Molyhil (news releases 26 November2018 and 7 May 2019). This has led to the reappraisal of the copper potential at Molyhil itself. Although copper was part of the historical resource estimates at Molyhil, copper has not been included in the recent Thor Mineral Resource and Reserve estimates, and does not form part of the DFS. At this time, Thor does not plan to amend the resource estimates for Molyhil, or the current DFS on the strength of this new copper perspective, and as such Thor ascribes no additional value for any potential copper revenues at this time."
An historic Molyhil Mineral Resource Estimate with copper included is available on the ASX website, and can be viewed, on page 33 of 124, via the following link:
https://www.asx.com.au/asxpdf/20060817/pdf/3y0txr8b44pkk.pdf
The information is extracted from the Thor Mining plc ASX listing prospectus issued August 2006 and is available to view on the ASX website. The company confirms that it is not aware of any new information or data in respect of copper values reported at the time, that materially affects the information included in the original market announcement and, in the case of estimates of Mineral Resources or Ore Reserves, that all material assumptions and technical parameters underpinning the estimates of copper values in the relevant market announcement continue to apply and have not materially changed. The company confirms that the form and context in which the Competent Person's findings are presented have not been materially modified from the original market announcement.
A photograph of portion of the core sample under ultraviolet light (highlighting scheelite mineralisation) is on the Company's website and can be viewed via the following link:
http://thormining.com/-/thor/lib/images/miscellaneous/Molyhil%20PQ%20Core.JPG
Further Information
The program comprised 195.6 metres of PQ (85.5mm diameter) diamond drilling into the Yacht Club lode of the Molyhil deposit.
The holes were designed to target high grade mineralisation and as a result are not appropriate for estimating the resource or the mineralisation geometry including true widths.
|
Hole ID |
Deposit |
Easting |
Northing |
Elevation |
Azi -muth |
Dip |
Hole depth (m) |
Intersection |
Estimated true width (m) |
|
19DD001 |
Molyhil |
577047 |
7482977 |
410.7 |
142 |
-70 |
97.9 |
Mineralised but Not assayed |
na |
|
19RC002 |
Molyhil |
577051 |
7482973 |
410.7 |
144 |
-55 |
97.7 |
92.6 metres @ 1.0% WO₃, 0.16% Mo and 0.13% Cu from 0m |
na* |
|
· Estimated true width is not available due to inappropriate hole orientation |
|||||||||
|
|
|
Table A: Molyhil down plunge metallurgical sample intercepts |
|
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A map showing the diamond drill hole location is on the Company's website and can be viewed via the following link:
http://thormining.com/-/thor/lib/images/miscellaneous/MHBS%20collar%20location%20plan%20201906.jpg
The information contained within this announcement is deemed to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014. Upon the publication of this announcement, this inside information is now considered to be in the public domain.
Enquiries:
|
Mick Billing |
+61 (8) 7324 1935 |
Thor Mining PLC |
Executive Chairman |
|
Ray Ridge |
+61 (8) 7324 1935 |
Thor Mining PLC |
CFO/Company Secretary |
|
Colin Aaronson/ Richard Tonthat/ Ben Roberts |
+44 (0) 207 383 5100
|
Grant Thornton UK LLP
|
Nominated Adviser |
|
Nick Emerson |
+44 (0) 1483 413 500 |
SI Capital Ltd |
Joint Broker |
|
David Hignell / Rob Rees |
+44 (0) 20 3470 0470 |
SP Angel Corporate Finance LLP |
Joint Broker |
|
Tim Blythe/ Camilla Horsfall |
+44 (0) 207 138 3222 |
Blytheweigh |
Financial PR |
Competent Person's Report
The information in this report that relates to exploration results is based on information compiled by Richard Bradey, who holds a BSc in applied geology and an MSc in natural resource management and who is a Member of The Australasian Institute of Mining and Metallurgy. Mr Bradey is an employee of Thor Mining PLC. He 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 the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Richard Bradey consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
Updates on the Company's activities are regularly posted on Thor's website www.thormining.com, which includes a facility to register to receive these updates by email, and on the Company's twitter page @ThorMining.
About Thor Mining PLC
Thor Mining PLC (AIM, ASX: THR) is a resources company quoted on the AIM Market of the London Stock Exchange and on ASX in Australia.
Thor holds 100% of the advanced Molyhil tungsten project in the Northern Territory of Australia, for which an updated feasibility study in August 2018¹ suggested attractive returns.
Adjacent Molyhil, at Bonya, Thor holds a 40% interest in deposits of tungsten, copper, and vanadium, including an Inferred resource for the Bonya copper deposit².
Thor also holds 100% of the Pilot Mountain tungsten project in Nevada USA which has a JORC 2012 Indicated and Inferred Resources Estimate³ on 2 of the 4 known deposits. The US Department of the Interior has confirmed that tungsten, the primary resource mineral at Pilot Mountain, has been included in the final list of Critical Minerals 2018.
Thor is also acquiring up to a 60% interest Australian copper development company Environmental Copper Recovery SA Pty Ltd, which in turn holds rights to earn up to a 75% interest in the mineral rights and claims over the resource⁴ on the portion of the historic Kapunda copper mine in South Australia recoverable by way of in situ recovery.
Thor has an interest in Hawkstone Mining Limited, an Australian ASX listed company with a 100% Interest in a Lithium project in Arizona, USA.
Finally, Thor also holds a production royalty entitlement from the Spring Hill Gold project⁵ of:
• A$6 per ounce of gold produced from the Spring Hill tenements where the gold produced is sold for up to A$1,500 per ounce; and
• A$14 per ounce of gold produced from the Spring Hill tenements where the gold produced is sold for amounts over A$1,500 per ounce.
Notes
¹ Refer ASX and AIM announcement of 23 August 2018
² Refer ASX and AIM announcement of 26 November 2018
³ Refer AIM announcement of 13 December 2018 and ASX announcement of 14 December 2018
⁴ Refer AIM announcement of 10 February 2016 and ASX announcement of 12 February 2018
⁵ Refer AIM announcement of 26 February 2016 and ASX announcement of 29 February 2016
JORC Code, 2012 Edition - Table 1 report
Section 1 Sampling Techniques and Data
|
Criteria |
JORC Code explanation |
Commentary |
|
Sampling techniques |
· Nature and quality of sampling (eg cut 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. · Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. · Aspects of the determination of mineralisation that are Material to the Public Report. · In cases where 'industry standard' work has been done this would be relatively simple (eg '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 (eg submarine nodules) may warrant disclosure of detailed information. |
Diamond drilling was used to produce core which was whole core crushed from which representative samples were taken and assayed. |
|
Drilling techniques |
· Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). |
PQ diameter core was taken for the entire length of the holes. The core was not oriented. |
|
Drill sample recovery |
· Method of recording and assessing core and chip sample recoveries and results assessed. · Measures taken to maximise sample recovery and ensure representative nature of the samples. · Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. |
After minor core loss at the collar (12% in first 1.7m run), 100% core recovery was achieved for the remainder of both holes. |
|
Logging |
· Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. · Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. · The total length and percentage of the relevant intersections logged. |
Core was logged geologically and photographed for the entire length of each hole. Mineralised and unmineralised zones were easily determined from geological observations. |
|
Sub-sampling techniques and sample preparation |
· If core, whether cut or sawn and whether quarter, half or all core taken. · If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. · For all sample types, the nature, quality and appropriateness of the sample preparation technique. · Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. · Measures taken to ensure that the sampling is representative of the in situ material collected, including for instance results for field duplicate/second-half sampling. · Whether sample sizes are appropriate to the grain size of the material being sampled. |
Whole core crushed to 80% passing 3.25mm a 2kg subsample was split off pulverised to 75µm from which a 25gram charge was taken for assay.
Industry standard internal laboratory QAQC procedures were applied.
No quality control measures were included with the core samples. PQ core is adequate size to represent the material sampled. |
|
Quality of assay data and laboratory tests |
· The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. · For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. · Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established. |
Industry standard sample preparation finishing with sample pulverisation to 80% passing 75µm. Analysis was via a combination of mixed four acid digest with ICP-OES and lithium borate fusion and ICP-MS. These techniques are considered appropriate for the analyte suite. Internal laboratory QA/QC protocol was implemented in the assay process. |
|
Verification of sampling and assaying |
· The verification of significant intersections by either independent or alternative company personnel. · The use of twinned holes. · Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. · Discuss any adjustment to assay data. |
Intersections reported correspond with visual indications in samples. No further independent verification has been undertaken. |
|
Location of data points |
· Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. · Specification of the grid system used. · Quality and adequacy of topographic control. |
Hand held GPS - accuracy is within +/- 2m horizontally and 5m vertically. Grid system used is GDA94, zone 53. |
|
Data spacing and distribution |
· Data spacing for reporting of Exploration Results. · Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. · Whether sample compositing has been applied. |
Drilling was designed to maximise metallurgical sample and thus orientation is not appropriate for resource estimation. |
|
Orientation of data in relation to geological structure |
· Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. · 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. |
Drilling was designed to maximise metallurgical sample and thus orientation is not appropriate for resource estimation. |
|
Sample security |
· The measures taken to ensure sample security. |
None |
|
Audits or reviews |
· The results of any audits or reviews of sampling techniques and data. |
None |
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