The mining newspaper for Alaska and Canada's North
The mining newspaper for Alaska and Canada's North
Finds evidence in both core and outcrop at Jackie CRD target North of 60 Mining News - January 24, 2024
Massive sulfide mineralization found on surface at the Silver Lime project on Core Assets' Blue property in Northern BC.
Deep, strong chargeability anomalies are shown within and below the Sulphide City porphyry-skarn target, as well as the Pete's and Gally CRD targets.
Core Assets Corp. Jan. 24 reported that the 2023 shallow drilling completed at the Jackie carbonate replacement deposit (CRD) target cut multiple zones of semi-massive to massive sulfide mineralization, as well as further evidence of a potentially much larger porphyry body underlying the zinc-lead-silver-copper mineralization found at surface at the Silver Lime project on the company's Blue property in Northern British Columbia.
Lying alongside the Alaska border in BC's Atlin Mining District, Blue is a 275,890-acre (111,650 hectares) land package covering high-grade skarn, carbonate replacement and porphyry targets enriched with silver, zinc, lead, copper, and gold.
The two most advanced project areas on the Blue property are Laverdiere, a high-grade skarn target in the southeastern area of the land package, and Silver Lime, a CRD and porphyry prospect area about 15 kilometers (nine miles) to the west.
Over the past two exploration seasons, Core Assets has carried out drilling to test the Sulfide City, Jackie, Grizzly, Pete's, and Gally targets along a 2,400-meter-long trend at Silver Lime.
Highlights from the 2022 and 2023 drilling include:
• 1.25 meters averaging 215 grams per metric ton silver, 9.9% zinc, 8.9% lead, and 0.36% copper in hole SLM22-001 (Jackie).
• 5.64 meters averaging 254 g/t silver, 4.8% zinc, 5.1% lead, 0.11% copper, and 0.12 g/t gold in hole SLM22-011 (Grizzly).
• 3.33 meters averaging 138 g/t silver, 7.3% zinc, 7.2% lead, and 0.54% copper in hole SLM23-016 (Pete's).
• 6.4 meters averaging 159 g/t silver, 7.7% zinc, 8.7% lead, and 023% copper in hole SLM23-028 (Pete's).
• Eight meters averaging 139 g/t silver, 2.3% zinc, 1.2% lead, and 0.18% copper in hole SLM23-048 (Gally).
The latest batch of assays from the 2023 drilling at Silver Lime are from eight holes drilled at Jackie. Highlights include:
• 2.2 meters averaging 187 g/t silver, 10.2% zinc, 13.7% lead, and 0.53% copper in hole SLM23-038.
• 0.5 meters averaging 307 g/t silver, 6.2% zinc, 17.8% lead, and 1.21% copper in hole SLM23-039.
• 4.55 meters averaging 116 g/t silver, 4.9% zinc, 6.7% lead, and 0.41% copper in hole SLM23-042.
Core says seven out of the eight holes drilled at Jackie last year hit either carbonate replacement or skarn mineralization. Both deposit types are formed when metals-enriched hydrothermal fluids come in contact and alter other rock types.
CRD and skarn deposits are indicative of nearby porphyry-style mineralization. While porphyry deposits are lower grade, they tend to be much larger and more sought after as a source of copper, gold, and other metals due to their size.
To identify the porphyry source of the CRD mineralization identified on the surface, Core contracted DIAS Geophysical Corp. to complete an induced polarization (IP) geophysical survey over a 2.3-square-kilometer (570 acres) area covering the Sulphide City, Pete's, and Gally targets.
This survey identified two significant deep-seated porphyry targets, one below Sulphide City and another in an undrilled area about 1,350 meters to the north.
Core's 2023 program identified signs of porphyry mineralization at Jackie, which lies about 2,000 meters southeast of the Sulphide City target.
Signs of porphyry mineralization were turned during a reevaluation of core from 2022 drilling at Jackie that identified a mineralized intrusion from a depth of 190.7 meters in hole SLM22-004. This intrusion averaged 46.7 g/t silver, 0.4% zinc, 0.7% lead, and 0.19% copper over 7.9 meters.
Prospecting at Silver Lime also discovered outcropping pebble dykes, or tabular pipes of broken country rock, at the Jackie, Gally, and Pete's targets in 2023.
Core says pebble dykes are common in many productive mining districts globally and can be strong indicators of prolonged magmatic-hydrothermal activity and the presence of a large, mineralized porphyry at depth.
"Results from the 2023 exploration program show strong evidence for the presence [of] mineralization styles spanning the full porphyry-CRD spectrum at the Jackie target and across the Silver Lime project", said CEO Nick Rodway.
So far, six highly prospective targets have been identified within a roughly 90-square-kilometer (35 square miles) area at Silver Lime. The geological, geophysical, and geochemical evidence for a deeper porphyry body or bodies underlying the surface skarns and CRD targets continues to grow.
"The Silver Lime CRD-porphyry project contains impressive and widespread occurrences of six target metals including silver, copper, zinc, lead, gold, and molybdenum within a 9x10 kilometer district-scale mineralized footprint that has multi-deposit potential," Rodway added.
Over his more than 16 years of covering mining and mineral exploration, Shane has become renowned for his ability to report on the sector in a way that is technically sound enough to inform industry insiders while being easy to understand by a wider audience.
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