Source - RNS
RNS Number : 9334M
Thor Mining PLC
19 October 2016
 

19 October 2016

 

 

THOR MINING PLC

 

MOLYHIL TUNGSTEN PROJECT - ASSAYS POINT TO NEW TUNGSTEN DEPOSITS

 

 

The Board of Thor Mining Plc ("Thor" or the "Company") (AIM, ASX: THR) is pleased to provide an update regarding positive exploration work conducted at the Company's wholly owned Tungsten-Molybdenum Molyhil Project ("Molyhil") situated in the Northern Territory of Australia.

 

Highlights

 

·        In January 2015 Thor produced an updated feasibility study in respect of Molyhil demonstrating a post tax NPV of A$67m (UK£42m) further details of which are provided on the Company's website;

·        Thor is now proactively building its knowledge of the Molyhil project with a view to further enhancing the quality of the existing resource/reserve, increasing the total amount confirmed Tungsten-Molybdenum mineralisation and further improving efficiency with regard to future planned mine activities;

·        One important element of this work has been to identify new areas of Tungsten mineralisation in and around the project, which is the subject of the positive findings in this market announcement;

·        Laboratory assay results have reinforced the prospectivity of several targets following the completion of the exploration drilling program to test for additional tungsten mineralisation satellite to the Company's existing Molyhil tungsten deposit;

·        Prospective host rocks (skarn & calc-silicate, with proximal granite) are confirmed to exist under shallow alluvial cover in each of three prospects tested (Cattle Track, Gap Track, and Think Big);

·        In addition the Company's work has identified elevated tungsten assays at Cattle Track and Gap Track prospects;

·        Finally, the exploration programme has confirmed elevated titanium assays at the Think Big prospect.

 

Mr Mick Billing, Executive Chairman, commented: 

 

"I am pleased to report further material progress in our campaign to further enhance the value and project economics of Molyhil. In today's challenging resource environment mineral development companies are ideally placed with advanced projects, and Molyhil falls into that category with a Definitive Feasibility Study already complete.

We are now going about the business of building our knowledge and the inherent value of Molyhil, and today's announcement marks some great progress in this regard. 

The fertility of the Cattle Track and Gap Track prospects has been enhanced.  Whilst the number of holes in each of these targets is, both limited and quite widely spaced, we have identified both geochemical signature and geology indicative of potential mineralisation.  Further drilling on each of these targets is warranted and will be scheduled and additional announcements will therefore follow.

In addition Thor will be providing further updates in the near term with regard to the Company's Pilot Mountain, Nevada project and specifically the efficient route we have identified to significantly increase the in-situ resource at that project.

Finally the Company remains highly proactive in the review of new opportunities.  We hope to provide a further update to market in this regard at the earliest opportunity."

 

Following the initial on site analyses using hand held XRF analyser, samples were sent for laboratory follow up assay. The laboratory assay process has a lower detection limit of 1 part per million ("ppm") compared with 10ppm for the hand held XRF, and also uses a larger sample size. Trends in tungsten distribution are now apparent in the laboratory assays that were not apparent in the earlier analyses.

 

The laboratory analyses show tungsten elevated at two to three times background levels in the vicinity of the Molyhil Pinnacle (Cattle track) and along the southern margin of the Gap Track prospect (refer to map). At Gap Track, where a broader spread of data points was collected, a trend of elevated tungsten is apparent which reflects the trend in elevated magnetic response. These are encouraging results albeit at subdued levels.

 

Due to its low chemical reactivity and high physical density, tungsten does not tend to disperse in the soil and weathered rock profile as much as more reactive metals such as copper.  As a result, any detection of tungsten is considered encouraging and worthy of follow up investigation.

 

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/

Daniel Bush/

Richard Tonthat

+44 (0) 207 383 5100

 

Grant Thornton UK LLP

 

Nominated Adviser

Gerry Beaney/

David Hignell

John Howes

+44 (0) 20 3861 6625

 

Northland Capital Partners Limited

Joint Broker

Nick Emerson /

Andy Thacker

+44 (0) 1483 413 500

SI Capital

Joint Broker

Tim Blythe/

 Camilla Horsfall

+44 (0) 207 138 3222

Blytheweigh

Financial PR

 

 

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.

 

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.

 

 

About Thor Mining PLC

Thor Mining PLC 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 2015¹ suggested attractive returns.  Thor also holds 100% of the Pilot Mountain tungsten project in Nevada USA which has a JORC 2012 Indicated Resources Estimate² on 1 of the 4 known deposits. 

 

In February 2016, Thor announced the sale of its Spring Hill Gold project³ for A$3.5million, of which A$1.5 remains due for settlement in February 2017, plus a royalty 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 gold⁴ 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 12 January 2015

·      ² Refer ASX and AIM announcement of 10 June 2014

·      ³ Refer ASX and AIM announcement of 29 February 2016

·      ⁴ At the date of this announcement gold is trading at approximately A$1,650/oz

 

 

Assay results

Hole Id

Easting GDA94

Northing GDA94

Sample depth-from (m)

Sample depth-to (m)

W (ppm)

Cu (ppm)

Mo (ppm)

Fe (ppm)

Ti (ppm)

16MAC001

577,893

7,483,253

1.5

2.8

3

30

2

20315

1350

16MAC002

577,897

7,483,300

0

1.5

<1

<10

<1

2795

220

16MAC003

577,900

7,483,348

1.5

3

3

20

1

11725

700

16MAC012

576,901

7,483,103

3

4.5

4

20

<1

23810

940

16MAC013

576,903

7,483,045

3

4.5

6

20

<1

30985

1660

16MAC014

576,899

7,482,999

1.5

3

4

20

<1

15140

1040

16MAC015

576,610

7,483,110

3

4.5

3

20

2

20760

1070

16MAC016

576,599

7,483,052

1.5

3

2

10

<1

61430

1430

16MAC017

576,589

7,482,996

1.5

3

3

50

1

34115

920

16MAC018

576,600

7,482,956

1.5

3

2

<10

<1

18285

1040

16MAC019

576,606

7,482,902

1.5

3

<1

<10

1

39530

1690

16MAC020

576,605

7,482,905

3

4.5

1

<10

4

42520

1870

16MAC021

576,298

7,482,888

6

7.5

5

10

6

26155

510

16MAC022

576,300

7,482,851

3

4.5

4

30

4

41445

1530

16MAC023

576,299

7,482,800

3

4.5

3

20

1

28625

1150

16MAC024

576,208

7,482,899

6

7.5

7

10

3

42175

2550

16MAC025

576,206

7,482,851

7.5

9

3

20

3

61045

2220

16MAC026

576,199

7,482,805

3

4.5

5

20

2

41810

1100

16MAC027

576,099

7,483,200

4.5

6

3

20

<1

38250

2520

16MAC028

576,103

7,483,248

3

4.5

3

40

<1

33075

2280

16MAC029

576,109

7,483,303

3

4.5

8

10

3

26635

2040

16MAC030

582,689

7,480,489

10.5

12

7

30

1

46590

4090

16MAC031

582,702

7,480,612

6

7.5

4

20

2

34205

1220

16MRAB032

583,400

7,480,298

7.5

9

1

30

<1

44750

5160

16MRAB033

583,398

7,480,400

6

7.5

3

10

<1

22735

1690

16MRAB034

583,398

7,480,493

4.5

6

3

10

<1

16545

2070

16MRAB035

583,204

7,480,601

3

4.5

3

20

3

19585

1510

16MRAB036

583,199

7,480,494

3

4.5

5

10

<1

18155

1550

16MRAB037

583,200

7,480,406

6

7.5

3

10

<1

22315

2130

16MRAB038

583,000

7,480,400

4.5

6

2

40

<1

54115

3080

16MRAB039

583,000

7,480,500

9

10.5

2

30

<1

35270

4100

16MRAB040

583,003

7,480,597

9

10.5

2

10

<1

22180

1840

16MRAB041

582,698

7,480,698

7.5

9

3

<10

<1

10855

710

16MRAB042

582,999

7,480,301

7.5

9

9

30

2

33460

1150

16MRAB043

583,202

7,480,301

6

7.5

7

30

2

27680

2000

16MRAB044

583,600

7,480,303

9

10.5

2

40

<1

38920

3160

16MRAB045

583,596

7,480,398

6

7.5

2

20

<1

39690

3250

16MRAB046

575,303

7,481,402

4.5

5

3

30

<1

49425

4970

16MRAB048

575,305

7,481,201

4.5

6

2

20

<1

47525

3900

16MRAB049

575,300

7,481,102

6

7.5

5

20

<1

18435

570

16MRAB050

574,898

7,480,908

4.5

6

3

30

<1

45895

3370

16MRAB051

574,899

7,481,003

3

4.5

2

20

<1

20920

790

16MRAB052

574,898

7,481,101

4.5

6

5

40

<1

31965

2800

16MRAB053

574,897

7,481,200

4.5

6

2

<10

<1

61125

3960

16MRAB054

574,895

7,481,295

4.5

6

1

30

<1

43950

4100

16MRAB055

574,856

7,481,393

7.5

9

2

20

<1

54035

2350

16MRAB056

574,895

7,481,497

1.5

3

<1

220

<1

86605

4200

16MRAB057

574,900

7,481,595

3

4.5

4

<10

<1

16870

2250

16MRAB058

575,305

7,481,504

4.5

6

4

<10

<1

16620

1470

16MRAB059

576,613

7,482,906

1.5

3

2

<10

<1

45370

1520

16MRAB060

576,602

7,482,899

3

4.5

2

<10

<1

37130

1600

16MRAB061

576,602

7,482,906

4.5

6

3

<10

<1

44060

2200

16MRAB062

577,897

7,483,301

1.5

3

3

<10

<1

54520

4900

16MRAB063

576,300

7,482,856

9

10.5

8

60

<1

27575

1760

16MRAB064

576,206

7,482,852

4.5

6

5

<10

1

51265

1810

16MRAB065

576,102

7,483,205

7.5

9

7

<10

<1

29245

1720

 

 

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.

Aircore and RAB drilling was used (as per hole id designation) to obtain 1.5 metre interval samples. 2kg subsamples were taken for logging, portable XRF analysis and follow up laboratory analysis where appropriate. Chip tray samples were collected and photographed.

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).

Initially aircore drilling was used but reverted to RAB as a result of difficulty penetrating large rocks within transported cover.

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.

Little to no sample recovery was generally achieved in the top 1.5 metres of RAB holes. Reasonable sample recovery was obtained thereafter. Sample recovery was not measured.

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.

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 were taken by hand scoop cutting across the entire volume of sample. This is not considered representative but adequate for reconnaissance geochemistry.

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.

Assay process comprised four acid digest followed by ICP-MS for Mo and W and ICP-OES for Cu, Fe and Ti. The assay process is not considered to be total for W and Mo and may result in a low bias for these elements.

No external QAQC reference materials were included in the assay process. Third party assay will be undertaken on a selection of samples.

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.

No significant intersections reported

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

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.

Holes were spaced between 50 and 100 metres apart in lines crossing anomalies at 100, 200 or 400 metres apart.

 

No compositing of samples was undertaken.

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.

All holes were vertical which is appropriate for reconnaissance geochemistry.

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

 

 

 

Section 2 Reporting of Exploration Results

Criteria

JORC Code explanation

Commentary

Mineral tenement and land tenure status

·    Type, reference name/number, location and ownership including agreements or material issues with third parties such as 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.

EL22349 100% Thor Mining plc

No known impediments to licence an operation.

Exploration done by other parties

·    Acknowledgment and appraisal of exploration by other parties.

No historic data other than the regional aeromagnetic data

Geology

·    Deposit type, geological setting and style of mineralisation.

Contact metamorphic skarn hosted tungsten.

Drill hole Information

·    A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes:

o easting and northing of the drill hole collar

o elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole collar

o dip and azimuth of the hole

o down hole length and interception depth

o hole 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 Person should clearly explain why this is the case.

Drill hole summary table provided above. The vertical holes were all located on an essentially level plain thus the collar rl has not been included.

Sample depth varied as a function of cover depth and depth of drill refusal.

Data aggregation methods

·    In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg cutting of high grades) and cut-off grades are usually Material and should be stated.

·    Where aggregate intercepts incorporate short lengths of high grade results and longer 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 metal equivalent values should be clearly stated.

None undertaken.

Relationship between mineralisation widths and intercept lengths

·    These relationships are particularly important in the reporting of Exploration Results.

·    If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported.

·    If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (eg 'down hole length, true width not known').

Not applicable

Diagrams

·    Appropriate maps and sections (with scales) and 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.

Refer to figure 1

Balanced reporting

·    Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results.

All results provided

Other substantive exploration data

·    Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical 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.

No other data

Further work

·    The nature and scale of planned further work (eg tests for lateral extensions or depth 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.

The results provided warrant follow up investigation which will most likely comprise further RAB drill geochemistry on a reduced spacing targeting the two area of elevated tungsten so far.

 


This information is provided by RNS
The company news service from the London Stock Exchange
 
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