09:17 Tue 01 Dec 2020
Thor Mining PLC - Pilbara Goldfields Ragged Range Update
THOR MINING PLC
PILBARA GOLDFIELDS RAGGED RANGE PROJECT
GOLD IN STREAM SEDIMENTS UP TO 2.2g/t
The directors of Thor Mining Plc ("Thor") (AIM, ASX: THR) are pleased to advise high grade gold in stream sediment samples, from the third phase of gold geochemical sampling, carried out in October, at the 100% owned Pilbara Goldfield Ragged Range Project in
Highlights:
§ High grade gold in stream sediments including:
• >2000ppb Au (>2.0 g/t) repeat 2.2g/t Au - 20PST51 (Au AR25 with repeat FA25)
• 1886ppb Au (1.9 g/t) - 20PST54 (Au AR25)
• 126ppb Au - 20PST52 (BLEG)
• 173ppb Au -20PST58 (BLEG)
• 111ppb Au-20PST66 (BLEG)
§ Third phase of stream sediment sampling defines four distinct clusters of consistently high-grade gold.
§ High grade gold continues to validate the mineralization potential along the 13km anomalous gold corridor, trending along the interpreted thrust-faulted mafic/ultramafic contact.
§ Geochemical data analyses continuing, with a field mapping and soil sampling program proposed over priority targets within the anomalous 13km gold trend to further delineate coherent gold trends prior to drill testing.
"These are very exciting times for Thor at Ragged Range, as this project continues to exceed expectations."
"A number of very promising drill targets appear destined for testing, and we expect that the interpretation of the airborne magnetic survey results (near completion) should confirm several of these."
"We look forward to providing further updates with continued progress."
A map showing the project location can be accessed from the Thor website via the attached link:
www.thormining.com/sites/thormining/media/maps/20-004-1a-ragged-range-location.jpg
Ragged Range Project, located in the prospective Eastern Pilbara Craton, WA (Figure 1) is 100% owned by Thor Mining - (E46/1190, E46/1262, E46/1355 (application), with the recent acquisition of additional tenure surrounding the gold anomalous zones, E46/1340 and E46/1354 (application).
Further to the AIM announcement of
The geochemical program was designed to follow up anomalous gold identified in stream sampling programs completed in
A link to an announcement of details of the sampling program may be accessed from the Thor website:
Stream Sediment Sampling-Gold Anomalism
Fifty-four (54) sample sites with a total of 112 stream sediment samples were selected for reconnaissance and follow up sampling to the 2019 and 2020 geochemical programs. 11 of the 54 sample sites returned anomalous gold values above 5ppb with 4 of these returning greater than 20ppb with results up to 2200ppb Au (2.2g/t Au - 20PST51) (Figure 2 and Table A).
From the -2mm AR25 samples, 10 samples are above background for the area (5ppb Au) and 5 samples are considered highly anomalous above 20ppb Au. Perhaps more importantly, from the BLEG samples, 13 samples are above the background 5ppb Au while 7 samples are considered to be highly anomalous above 20ppb Au. The coarse >2mm fraction show little anomalism with the highest assay being only 7ppb Au in a sample that reports only 3ppb Au in the <2mm AR25 and 2.31ppb Au in the BLEG assay.
These high-grade gold results in conjunction with the results from the
www.thormining.com/sites/thormining/media/maps/rr-clusters-202012.jpg
These clusters indicate close proximity to a gold source and will now form the focus of future exploration activities with soil sampling and mapping upstream to identify the gold source for defined drill targets.
Consistent anomalous gold along the gold corridor is a good indication that the corridor is open along strike extending south into E46/1355 application (100% Thor Mining).
ROCK SAMPLING PROGRAM
In conjunction with the stream sediment program a 1.5km rock chip sampling traverse was undertaken in the central gold anomalous catchment zone, (https://www.thormining.com/sites/thormining/media/pdf/asx-announcements/20200902-asx-rr-gold-sample-results.pdf ). A total of 14 rock samples collected returned elevated gold in results up to 45ppb Au.
Table A: Phase
Coordinates in
At each site; a fine (< 2mm) and coarse fractions (>2mm) were collected and assayed by Intertek method AR25 (Aqua Regia) with an additional 2kg sample of the <2mm being assayed by Bulk Leach Extractable Gold (BLEG) using method CN2000 (Cyanide leach)
| Sample No | Easting | Northing | Au ppb < 2mm AR25/MS | Au ppb BLEG CN2000/MS | Au g/t < 2mm FA25 | Visible Gold Counts | Pan Description |
| 20PST35 | 781931 | 7585352 | 1 | 1.02 |
| 1 | 1 fine flat |
| 20PST36 | 781978 | 7585309 | 2 | 2.86 |
| 2 | 1 vf, 1 f, flat |
| 20PST37 | 781465 | 7585976 | 59 | 2.05 |
|
|
|
| 20PST38 | 781446 | 7585995 | 2 | 1.2 |
|
|
|
| 20PST39 | 783695 | 7586449 | 1 | 0.37 |
|
|
|
| 20PST40 | 783744 | 7586393 | 0.5 | 0.47 |
|
|
|
| 20PST41 | 783087 | 7586092 | 0.5 | 0.38 |
|
|
|
| 20PST42 | 783151 | 7586067 | 8 | 0.82 |
|
|
|
| 20PST43 | 783092 | 7586667 | 3 | 0.56 |
|
|
|
| 20PST44 | 783082 | 7586651 | 1 | 0.65 |
|
|
|
| 20PST45 | 785554 | 7579865 | 8 | 1.82 |
|
|
|
| 20PST46 | 785595 | 7579873 | 6 | 1.61 |
| 1 | 1 med, rnd edges flat |
| 20PST47 | 785828 | 7578310 | 2 | 8.1 |
|
|
|
| 20PST48 | 785736 | 7580837 | 1 | 1.89 |
|
|
|
| 20PST49 | 783402 | 7582258 | 0.5 | 0.85 |
|
|
|
| 20PST50 | 784483 | 7582317 | 0.5 | 0.48 |
|
|
|
| 20PST51 | 783101 | 7583251 | 2200 | 24.51 | 2.2 | 1 | 1f, flat, ang |
| 20PST52 | 781564 | 7584405 | 3 | 126.41 |
|
|
|
| 20PST53 | 781579 | 7584409 | 7 | 3.06 |
| 2 | 1vcrs, 1f, rnd edges |
| 20PST54 | 780793 | 7585100 | 1886 | 113.2 |
| 6 | 6, 3vcrs,3f ang |
| 20PST55 | 784130 | 7586221 | 2 | 1.08 |
|
|
|
| 20PST55A | 784889 | 7578997 | 3 | 0.5 |
|
|
|
| 20PST56 | 784791 | 7578909 | 3 | 0.49 |
|
|
|
| 20PST57 | 786567 | 7579686 | 2 | 10.34 |
| 1 | 1f, flat |
| 20PST58 | 786632 | 7579686 | 10 | 173.8 |
| 2 | 1rnd,1jagged |
| 20PST59 | 784512 | 7580045 | 2 | 1.56 |
|
|
|
| 20PST60 | 784483 | 7580095 | 0.5 | 0.33 |
|
|
|
| 20PST61 | 784997 | 7580395 | 3 | 0.5 |
|
|
|
| 20PST62 | 785055 | 7580397 | 3 | 2.31 |
|
|
|
| 20PST63 | 783987 | 7581754 | 3 | 17.88 |
| 1 | 1f, rnd edges |
| 20PST64 | 783991 | 7581733 | 0.5 | 0.86 |
| 1 | 1 med, ang |
| 20PST65 | 783483 | 7581421 | 1 | 0.48 |
|
|
|
| 20PST66 | 783758 | 7582481 | 25 | 111.72 |
|
|
|
| 20PST67 | 783758 | 7582481 | 0.5 | 0.27 |
|
|
|
| 20PST68 | 783730 | 7582380 | 4 | 1.23 |
|
|
|
| 20PST69 | 783623 | 7583470 | 0.5 | 0.57 |
|
|
|
| 20PST70 | 781012 | 7585654 | 6 | 1.84 |
| 2 | 2vf jagged |
| 20PST71 | 784727 | 7585751 | 0.5 | 0.48 |
|
|
|
| 20PST72 | 785405 | 7585414 | 3 | 1.6 |
|
|
|
| 20PST73 | Blank |
| 0.5 | 0.5 |
|
|
|
| 20PST74 | 779246 | 7591856 | 2 | 45.17 |
| 1 | 1vf ang |
| 20PST75 | 781315 | 7590257 | 2 | 0.48 |
|
|
|
| 20PST76 | 780314 | 7588246 | 3 | 1.39 |
|
|
|
| 20PST77 | 780215 | 7589963 | 0.5 | 1.05 |
|
|
|
| 20PST78 | 779931 | 7589619 | 2 | 1.44 |
|
|
|
| 20PST79 | 779364 | 7588975 | 0.5 | 0.34 |
|
|
|
| 20PST80 | 780208 | 7586992 | 0.5 | 0.18 |
|
|
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| 20PST81 | 779335 | 7590223 | 2 | 0.51 |
|
|
|
| 20PST82 | 780919 | 7590737 | 0.5 | 21.9 |
|
|
|
| 20PST83 | 780906 | 7590789 | 3 | 2.96 |
|
|
|
| 20PST84 | 779341 | 7588937 | 0.5 | 15.55 |
| 6 | 6f, ang |
| 20PST85 | 780535 | 7587470 | 0.5 | 0.43 |
|
|
|
| 20PST86 | 780456 | 7587628 | 0.5 | 0.38 |
|
|
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| 20PST87 | 779895 | 7587610 | 0.5 | 0.59 |
|
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| 20PST88 | 780193 | 7587005 | 0.5 | 10.18 |
|
|
|
| 20PST89 | 779892 | 7587638 | 5 | 5.94 |
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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:
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Competent Persons Report
The information in this report that relates to exploration results is based on information compiled by
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
At the 100% owned Ragged Range Project in the Pilbara region of
Thor is earning an 80% interest in the Alford East copper project, on
Thor also holds a 30% interest in Australian copper development company EnviroCopper Limited, which in turn holds rights to earn up to a 75% interest in the mineral rights and claims over the resource on the portion of the historic Kapunda copper mine in
Thor holds 100% of the advanced Molyhil tungsten project in the
Adjacent Molyhil, at Bonya, Thor holds a 40% interest in deposits of tungsten, copper, and vanadium, including Inferred resource estimates for the Bonya copper deposit, and the White Violet and Samarkand tungsten deposits².
Thor holds 100% of the
"Thor holds mineral claims in the US states of
Notes
¹ Refer ASX and AIM announcement of
² Refer ASX and AIM announcement of
³ Refer AIM announcement of
⁴ Refer AIM announcement of
⁵ Refer ASX and AIM announcement of
1 JORC Code, 2012 Edition - Table 1 report template
1.1 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. | The programme comprised stream sediment trap site sampling with coarse (3kg - 5mm+2mm) and fine (4kg - 2mm) fraction samples collected for geochemical analysis for Au 2kg BLEG (fine fraction), aqua regia (fine and coarse fractions) and multi-element analysis. In addition a 10-12 kg sample of - 2mm material was collected from each trap site and panned in the field. Each rock chip sample comprised 8 - 10kg of rock taken along a 1.5km traverse for geochemical analysis for Au (FA 50) and multi-element 4 acid digestion. |
| 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). | Not applicable |
| 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. | Not applicable |
| 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. | No logging was undertaken |
| Sub- sampling techniques | · 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 | Samples were screened in the field as described in "Sampling Techniques" above. The sample sizes are as per industry standard for stream |
¶
| and sample preparation | 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. | sediment geochemistry. One field duplicate and one blank sample were submitted for assay with the other samples. |
| 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. | The proposed assay method is appropriate for preliminary exploration. |
| 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. | Not 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 - MGA94 zone 50 (GDA) |
| 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. | Not applicable - no resource is being reported |
| 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. | Orientational bias is not applicable to stream sediment sampling which are essentially one dimensional. |
| Sample security | · The measures taken to ensure sample security. | Samples were flown back to Nullagine and trucked to the assay laboratory in |
¶
| Sample security levels are considered appropriate for a preliminary reconnaissance assessment. | ||
| Audits or reviews | · The results of any audits or reviews of sampling techniques and data. | None undertaken |
1.1 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. | Exploration results are reported on E46/1190 and E46/1262 in |
| Exploration done by other parties | · Acknowledgment and appraisal of exploration by other parties. | Not applicable |
| Geology | · Deposit type, geological setting and style of mineralisation. | Yet to be determined |
| 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. | No drilling has been undertaken or reported |
| 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 | Only field observations have been reported. There has been no data aggregation. |
¶
| values should be clearly stated. | ||
| 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'). | No drilling has been undertaken or reported |
| 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. | A sample location plan including current 1:100k scale geology has been provided |
| 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 have been reported |
| 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. | All data have been reported |
| 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. | Based on results follow up stream sediment and/or soil geochemistry surveys in conjunction with geological mapping and rock chip sampling programs will be undertaken to locate the source of any gold mineralisation. |
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