REG - Thor Mining PLC - Bonya - High grade tungsten results confirmed

Thor EnergyAnnouncement

24/06/2019 07:06

RNS Number : 1543D
Thor Mining PLC
24 June 2019
 


24 June 2019
 
BONYA - HIGH GRADE TUNGSTEN RESULTS CONFIRMED
 
The Board of Thor Mining Plc ("Thor") (AIM, ASX: THR) is pleased to advise that the final follow up laboratory assay results from the recent Bonya RC drill program confirm the previously reported interim portable XRF results (1st and 7th May 2019).
The project is held in joint venture between Arafura (60%) and Thor (40%) with Thor acting as manager.
Tungsten highlights from White Violet include;
·    27m @ 0.29% WO3 from 35m including 16m at 0.31% Cu from 43m and 7m @ 0.2% WO3 from 67m; White Violet hole 19RC020
·    12m @ 0.67% WO3 from 46m; 25m @ 0.39% WO3 from 63m and; 5m @ 0.1%WO3 from 96m; White Violet hole 19RC021
·    29m @ 0.70% WO3 from 81m; including 13m at 1.13% WO3 from 91m; White Violet hole 19RC022
Tungsten highlights from Samarkand include;
·    13m @ 0.48% WO3 from 19m; Samarkand hole 19RC026
·    8m @ 0.45% WO3 from 38m; Samarkand hole 19RC028
·    9m @ 0.74% WO3 from 64 m including 2m @ 0.2% Cu from 69m; Samarkand hole 19RC030
Copper intersections from Samarkand include
·    5m @ 0.36% Cu from 9m including 2m @ 0.23% WO3; Samarkand hole 19RC029
·    12m @ 0.77% Cu from 22m; Samarkand hole 19RC030
·    7m @ 1.23% Cu from 37m; Samarkand hole 19RC030
 
Mick Billing, Executive Chairman of Thor Mining, commented:
"It is exciting to have confirmation of very good tungsten results along with exciting copper readings from the White Violet and Samarkand deposits at Bonya."
"These robust, near surface tungsten and copper mineralisation occurrences have significant growth potential and the joint venture will now target near term drilling to both test the extent of the deposits and facilitate reportable mineral resource estimates.
"The proposed Molyhil processing facility is designed to extract copper as well as tungsten and molybdenum so any primary copper at Bonya can potentially be extracted at minimal additional cost."
"In the event that follow up drilling leads to the definition of mineral resource estimates, there is potential to add materially to both the life and financial outcomes at the Company's Molyhil project"
 
Investors wishing to review a diagram outlining the deposits at Bonya may view this on the Company's website via the following link:
http://thormining.com/-/thor/lib/images/maps/15-001-1B%20Bonya%20Exploration%20Targets.jpg
 
Further Information
The program comprised 2,184 metres of drilling by Reverse Circulation (RC) method on Samarkand, Jericho, White Violet, and Tashkent deposits. A complete list of significant drill intercepts is tabulated below along with estimated true widths of mineralisation.




Hole ID


Easting

(GDA94

zone 53)


Northing

(GDA94

zone 53)


Elevation

(m ASL)


Azi -muth


Dip


Hole depth (m)


Intersection


Estimated true width (m)





Tashkent




19RC001


616930


7488325


355


49.9


-59.3


40


2m @ 0.35%WO3 from 16m
2m @ 0.21%WO3 from 20m


1
1




19RC002


616913


7488309


360


51.9


-52


66


3m @ 0.12%WO3 from 55m


1.5




19RC003


616868


7488375


366


50.1


-60.7


40


No significant intercept








19RC004


616853


7488356


368


42.1


-55.1


60


No significant intercept








19RC005


616837


7488392


368


44.2


-59.6


40


3m @ 0.39%WO3 from 18m


1.5




19RC006


616819


7488370


370


43.3


-52.3


60


No significant intercept








19RC007


616789


7488425


370


50.9


-55.7


40


No significant intercept








Jericho




19RC008


614467


7489484


383


68.1


-54.3


40


1m @ 0.22%WO3 from 17m


1




19RC009


614466


7489482


383


79.9


-78.4


60


3m @ 0.31%WO3 from 31m
2m @ 0.46% Cu from 32m
4m @ 0.23%WO3 from 35m


1.5
1
2




19RC010


614489


7489449


380


65.1


-53.2


40


No significant intercept








19RC011


614488


7489447


380


76.3


-79.4


60


No significant intercept








19RC012


614509


7489412


379


63.4


-59.4


40


No significant intercept








19RC013


614507


7489413


379


52.4


-77.4


60


No significant intercept








White Violet




19RC014


609754


7486033


409


206.5


-54.6


60


No significant intercept








19RC015


609764


7486047


410


206


-58.9


60


No significant intercept








19RC016


609768


7486056


409


209


-63


78


No significant intercept








19RC017


609734


7486034


422


211.4


-60


66


1m @ 0.2%WO3 from 45m


1




19RC018


609736


7486044


421


208.9


-60.3


108


1m @ 0.13%WO3 from 71m
3m @ 0.16%WO3 from 80m
10m @0.15% WO3 & 0.38% Cu fr 87m


0.5
1.5
6




19RC019


609739


7486056


420


198.6


-58.1


108


3m @ 0.16%WO3 from 79m


2




19RC020


609684


7486043


403


204.1


-56.7


90


27m @ 0.29%WO3 from 35m including 16m @0.31% Cu from 43m
7m @ 0.20%WO3 from 67m


20
12
4




19RC021


609690


7486054


403


206.9


-57.7


108


12m @ 0.67%WO3 from 46m
25m @ 0.39%WO3 from 63m
5m @ 0.1%WO3 from 96m


30




19RC022


609697


7486063


403


202.8


-57.7


120


29m @ 0.70%WO3 from 81m
including 13m at 1.13%WO3 fr 91m


20




19RC023


609712


7485992


401


5.8


-56.4


60


No significant intercept


-




Samarkand




19RC024


612011


7485446


422


51.7


-60.5


60


No significant intercept








19RC025


612031


7485459


421


55.1


-59


100


3m @ 0.34% WO3 from 40m
2m @0.50% WO3 from 52m
3m @ 0.08%WO3 from 60m
2m @ 0.12%WO3 from 73m


1.5
1
1.5
1




19RC026


612052


7485478


420


47.7


-60.9


60


13m @ 0.48%WO3 from 19m


7




19RC027


612055


7485480


419


45.9


-59


40


3m @ 0.27% WO3 from 7m


1.5




19RC028


612046


7485433


415


56.6


-55.6


120


8m @ 0.45% WO3 from 38m


5




19RC029


612078


7485355


435


42.2


-55.1


60


5m @ 0.36% Cu from 9m including
2m @ 0.23% WO3
1m @ 0.7% Cu and 0.1% WO3 fr 24m
5m 0.52% Cu from 44m


3
1
0.5
3




19RC030


612088


7485364


435


54.7


-59


120


13m @ 0.27% Cu from 4m including
7m @ 0.11% WO3 from 10m
12m @ 0.77% Cu from 22m including
4m @ 0.09% WO3 from 28m
9m @0.74% WO3 from 64 m including
2m @ 0.2% Cu from 69m
5m @ 0.3% WO3 and 0.52% Cu fr 99m


7
4
7
2.5
5
1
3




19RC031


612103


7485382


431


54.8


-60


60


7m @0.44% Cu from 25m
1m @ 0.16% WO3 from 39m
2m @0.24% Cu from 57m


4
0.5
1




19RC032


612110


7485390


429


55.2


-62.1


60


1m @ 0.44% Cu from 7m
7m @ 1.23% Cu from 37m including
2m @ 0.09% WO3 from 41m


0.5
4
1








Bonya drilling April 2019 significant assay intercepts with estimated true widths







 
A small program of costean (~1-metre-deep trench) sampling was undertaken at the Tashkent and Marrakech deposits during the drill program. At Tashkent the costeans were situated midway between the drill sections to provide infill data to the drilling. Two significant intercepts are tabled below support the drill data provided above in addition to areas of outcropping visual tungsten mineralisation. Due to the narrow width and low tungsten grade, Tashkent is unlikely to subject of further exploration efforts in the near future.
There were no significant intersections from the Marrakech deposit costeans however the potential scale of the deposit reported in historic reports deems the deposit worthy of further investigation at some future stage.



Costean ID


Easting

GDA94

zone 53)


Northing

GDA94

zone 53)


Elevation

(m ASL)


Azi -muth


Dip


Sample length (m)


Significant Intersection


Estimated true width (m)




Marrakech




19MC01


607782


7491012


461


025






33


No significant intersection








19MC02


607752


7490979


469


348






55


No significant intersection








Tashkent




19TC01


616925


7488345


371


050


0


12


3m @ 0.29%WO3 from 3m


3




19TC02


616887


7488368


374


047


0


13


No significant intersection








19TC03


616849


7488393


377


043


0


11


2m @ 0.13%WO3 from 6m


2




19TC04


616819


7488421


382


049


0


10


No significant intersection












Bonya costean sampling April 2019 significant assay intercepts with estimated true widths







 
 
 
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.


Reverse Circulation drilling with face sampling hammer was used to obtain one metre interval samples. All samples were dry.
Subsamples of approximately 2-3kg were taken from each interval using rotary splitter for indicative portable XRF analysis and follow up laboratory analysis where appropriate. Chip tray samples were collected, logged and photographed.
 
Industry standard QAQC protocol was adopted with reference material inserted at approximately 1 in 20.
 




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).


Reverse circulation drilling with face sampling hammer.




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.


Visual estimate was used to gauge overall sample recoveries. Reasonable sample recovery was obtained after the initial collar sample. Sample recoveries were consistent across different rock units.




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.


Hole cuttings were 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.


Subsamples for independent laboratory analyses were taken by Rotary splitter - all samples were dry.
Sample size of 2-3kg is appropriate for RC samples with a maximum particle size of 6mm.
 
For preliminary XRF determination not to be used for resource estimation - a further subsample of 30g was taken which is not considered representative.




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. Preliminary analysis via mixed four acid digest with ICP-OES. Samples with initial tungsten results >0.1% have follow up assay by peroxide fusion and ICP-MS. The technique is considered appropriate for the analyte suite.
Industry standard QA/QC protocol is 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.


Significant 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.


Drill spacing was variable for this program. Infill and extensional drilling will be undertaken before resource estimation is undertaken. 40 metre spaced sections with 25 metre spaced hole intercepts is considered appropriate for this style of mineralisation.
No resource or reserve is being reported.
Samples have not been composited.




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.


Hole orientations are appropriately for the orientation of target mineralised zones. Estimated true widths are stated.




Sample security


·    The measures taken to ensure sample security.


The project is located in a remote region. No unauthorised company personnel visited the site during operations. Assay samples were collected from each hole immediately after drilling. Samples were transported for safe storage at a base camp before being securely packaged for transport to the laboratory. All submitted assay samples were receipted by the laboratory.




Audits or reviews


·    The results of any audits or reviews of sampling techniques and data.


None



 
 




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