09:10:59 EDT Sat 30 Sep 2023
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Prime Mining Corp
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Prime Mining drills 4.3 m of 52.1 g/t Au at Los Reyes

2022-04-12 09:07 ET - News Release

Mr. Daniel Kunz reports


Prime Mining Corp. has released continuing positive drill results from 26 drill holes in Guadalupe East, one of eight deposits at its wholly owned Los Reyes gold-silver project in Sinaloa state, Mexico.


  • Second high-grade ore shoot identified in Guadalupe East;
  • Bonanza grades encountered in 550-metre stepout from 2020 inferred open pit boundary;
  • Deepest mineralization encountered to date at Guadalupe East;
  • 236 drill holes have now been completed across the entire project (122 in phase 1 and 114 in phase 2) with 69 pending receipt of assay data and dissemination;
  • Nine drills continue to operate at Los Reyes as part of the 50,000 m phase 2 program.

Chief executive officer Daniel Kunz commented: "22GE-32 is the deepest bonanza-grade mineralization ever encountered at Guadalupe East. Two weeks ago, we announced drill holes results from Zapote that increased the mineralized footprint at the western portion of Los Reyes, including 22ZAP-55R, which hit the widest-ever high-grade intercept to date and ended in mineralization. With intercepts well below and outside the current Los Reyes resource pit boundaries at both Guadalupe and Zapote, the phase 2 drilling is leading to resource expansion and outlining new targets requiring additional drilling."

Drill hole 22GE-32 intercepted high-grade gold-silver at the intersection of multiple mineralized structures higher up in the Estaca vein system. Initial modelling suggests this may be a bonanza-grade plunging body (locally known as a clavo), the second such structure now encountered at Guadalupe East. Hole 22GE-33, previously released March 8, 2022, struck a 41.6 m long, high-grade mineralized intercept also located at intersecting multiple mineralized structures. With continued drilling, these plunging ore shoots, clavos, are being modelled and targeted for drilling.

Drill hole 22GE-32 also intersected a second zone of bonanza-grade mineralization at 500 m below surface (502 m above sea level), representing the deepest mineralization intersected to date at Guadalupe East.

Highlight drill intercepts

Estaca vein:

  • 52 grams per tonne gold and 1,007.6 gpt silver over 4.3 m (four m estimated true width (etw)) plus 7.62 gpt Au and 1,970 gpt Ag over 1.5 m (0.6 m etw) (22GE-32);
  • 1.38 gpt Au and 39.5 gpt Ag over 19.5 m (18.3 m etw) plus 1.12 gpt Au and 38.3 gpt Ag over 15 m (14.1 m etw) (22GE-38);
  • 4.09 gpt Au and 102.6 gpt Ag over 2.6 m (2.5 m etw) (22GE-43);
  • 1.47 gpt Au and 40.4 gpt Ag over 7.5 m (7.5 m etw) (22GE-47).

San Nicholas and San Manuel veins:

  • 3.72 gpt Au and 370 gpt Ag over three m (1.9 m etw) plus 1.57 gpt Au and 2.5 gpt Ag over 1.5 m (one m etw) plus 1.19 gpt Au and 9.1 gpt Ag over one m (0.6 m etw) (22GE-42);
  • 1.38 gpt Au and 63.1 gpt Ag over 4.9 m (2.8 m etw) (22GE-31);
  • 1.01 gpt Au and 4.7 gpt Ag over 2.8 m (2.4 m etw) plus 1.87 gpt Au and 6.9 gpt Ag over 1.5 m (1.3 m etw) (21GE-21);
  • 1.42 gpt Au and 2.3 gpt Ag over one m (0.9 m etw) (21GE-26).

Five drill rigs now operate at Guadalupe East in the phase 2 program with 11 drill holes completed but pending assay results. Phase 2 drilling is testing the Guadalupe East veins, including the Estaca vein, along strike and at depth and targeting the known extensions of open-pit resources. The drill holes reported today intercepted the high-grade Estaca, the San Nicolas and the San Manuel epithermal veins as well as other subparallel veins in the system. Two holes are from the phase 1 program and 24 holes from phase 2. Three holes were drilled to intersect mineralization within the boundary of the April, 2020, inferred resource open pit and the other holes were outside that boundary, seeking to expand mineralization at depth and southeast along strike of the semi-parallel Estaca and San Nicholas vein structures. Three of the reported holes were terminated in old workings or contained no significant mineralization.

Guadalupe East

San Nicolas and San Manuel, along with the Estaca, were the principal veins historically mined underground at Guadalupe East. Both San Nicolas and San Manuel are largely untested by current and historical drilling.

Drill holes 21GE-21, 21GE-22, 21GE-24, 21GE-25, 21GE-26, 21GE-31 and 22GE-42 intercepted the San Nicolas vein. The San Nicolas vein lies directly within the footwall of the Estaca vein, and outcrops in the shallowest portions of the northeast boundary of the April, 2020, pit-constrained resource.

Phase 2 drilling includes additional drilling to determine the extent and alignment of near-surface resources from the San Nicolas and San Manuel veins that could potentially be mined in conjunction with the main Guadalupe East pit-constrained resource.

Quality assurance/quality control protocols and sampling procedures

Drill core at the Los Reyes project is drilled in predominately HQ size (63.5 millimetres), reducing to NQ or BQ size ranges (47.6 mm and 36.5 mm respectively) when required. Drill core samples are generally 1.50 m long along the core axis with allowance for shorter or longer intervals if required to suit geological constraints. Each entire hole is split, and one-half is submitted for assay. Reverse circulation drilling returns rock chips and fines from a 133.35 mm diameter tricone bit. The returns are homogenized and split into two halves, one submitted for analysis and the other stored.

Sample QA/QC measures of unmarked certified reference materials, blanks and field duplicates as well as preparation duplicates are inserted into the sample sequence and make up approximately 8 per cent of the samples submitted to the lab for each drill hole.

Samples are picked up from the project by the laboratory personnel and transported to their facilities in Durango or Hermosillo, Mexico, for sample preparation. Sample analysis is carried out by Bureau Veritas and ALS Labs, with fire assay, including overlimits fire assay reanalysis, completed at their respective Hermosillo, Mexico, laboratories and multielement analysis in North Vancouver, B.C., Canada. Drill core sample preparation includes fine crushing of the sample to at least 70 per cent passing less than two mm, sample splitting using a riffle splitter and pulverizing a 250-gram split to at least 85 per cent passing 75 microns.

Gold in diamond drill core is analyzed by fire assay and atomic absorption spectroscopy of a 30-gram sample (code FA430 or Au-AA23). Multielement chemistry is analyzed by four-acid digestion of a 0.25-gram sample split (code MA300 or ME-ICP61) with detection by inductively coupled plasma emission spectrometer for a full suite of elements.

Gold assay techniques FA430 and Au-AA23 have an upper detection limit of 10 parts per million. Any sample that produces an overlimit gold value via the initial assay technique is sent for gravimetric finish via method FA-530 or Au-GRA21. Silver analyses by MA300 and ME-ICP61 have an upper limit of 200 ppm and 100 ppm, respectively. Samples with overlimit silver values are reanalyzed by fire assay with gravimetric finish FA530 or Au-GRA21.

Both Bureau Veritas and ALS Labs are ISO/IEC-accredited assay laboratories. Drill core assay results range from below detection to 163 gpt gold and 4,955 gpt silver. Composite intervals use a cut-off grade of 0.20 gpt gold.

Qualified person

Scott Smith, PGeo, executive vice-president of exploration, is a qualified person for the purposes of National Instrument 43-101 and has reviewed and approved the technical content in this news release.

Los Reyes gold and silver project

Los Reyes is a rapidly evolving high-grade, low-sulphidation epithermal gold-silver project located in Sinaloa, Mexico, within the prolific Sierra Madre mining region. Historic operating results indicate that an estimated one million ounces of gold and 60 million ounces of silver were recovered from five separate operations at Los Reyes between 1770 and 1990. Prior to Prime's acquisition, recent operators of Los Reyes had spent approximately $20-million (U.S.) on exploration, engineering and prefeasibility studies. The project remains underexplored as only 40 per cent of the known structures have been systematically drilled, leaving 10 kilometres of untested strike length. Los Reyes holds potential for additional discovery and resource expansion.

Prime Mining acquired Los Reyes is 2019, completed initial data compilation that included 51,000 metres of historical drilling, field mapping and trenching in 2020, and in 2021, executed a phase 1 exploration program that included 25,650 metres of drilling. Results suggest the eight known deposits are much larger than previously reported and potential exists for new discoveries outside of current defined resource areas. The company is currently undertaking a 50,000-metre phase 2 exploration program.

About Prime Mining Corp.

Prime Mining is an ideal mix of successful mining executives, strong capital markets personnel and experienced local operators who have united to undertake exploration drilling to expand the known gold-silver resource at the historically productive Los Reyes project in Mexico. Prime Mining has a well-planned capital structure with significant team and insider ownership.

We seek Safe Harbor.

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