Marimaca Copper Corp. (TSX: MARI) has obtained positive results from a further 13 reverse circulation (RC) drill holes, totalling 2,910m, from the 2022 infill drilling campaign at the Marimaca Oxide Deposit (MOD) in Chile.
Similar to the previously released results, these holes confirmed the mineralised zones as interpreted in the existing Mineral Resource Estimate (MRE) area for the MOD, and, in several cases, extended mineralisation outside the 2019 MRE block model or encountered higher grades than expected. Deeper drilling in the centre of the deposit continues to highlight the excellent continuity of the newly discovered MAMIX zone at depth.
Highlights
- Drilling continues to highlight excellent continuity of the mineralised system from surface to depths of nearly 500m
- Several holes confirm extension potential outside the historical MRE limits
- Deeper drilling continues to define broad depth extensions in the MAMIX zone with better grades at depth
- East and northeastern extensions to the MOD identified in MAR-140, MAR-146, MAR-147 and MAR-148
- Infill drilling grades continue to surprise to the upside
- MAR-149 intersected 190m @ 0.39% CuT from 2m including 126m @ 0.53% CuT from 2m
- Zone previously interpreted in MRE to be in the range of 0.10-0.30% CuT
- Result is supported by MAR-148 which intersected 70m @ 0.34% CuT from 20m
- MAR-149 intersected 190m @ 0.39% CuT from 2m including 126m @ 0.53% CuT from 2m
- MAR-145A intersected 462m of 0.31% CuT from 8m
- Bottom of the hole intersected 76m of 0.50% CuT ending in mineralisation and remains open at depth
- ATR-110 intersected 438m of 0.24% CuT from 2m
- Bottom of the hole intersected 76m of 0.60% CuT from 364m to 440m
- ATR-111 intersected 262m of 0.41% CuT from 2m
“Once again, we are impressed by the remarkable continuity and predictability of the MOD. Drilling intersected mineralisation at the expected depths in all drill holes as well as extending mineralization in several areas,” VP Exploration, Sergio Rivera, said.
“Grades observed in the drilling campaign continue to surprise on the upside, which is a phenomenon we have experienced in our previous infill drilling programmes. We note infill holes MAR-148 and MAR-149, which are in an area previously interpolated in the MRE to be lower grade material in the range of 0.1% to 0.3% CuT. Both intersected broad zones of green oxide, mixed and enriched materials with MAR-149 encountering 126m of 0.53% CuT from 2.0 m and MAR-148 returning 70m of 0.34% CuT from 20m.
“These results are a significant improvement in grade from the MRE interpolations and have positive implications for average grade in the area and could even enable some lower grade areas, previously stranded, to be captured in the updated mine plans.
“The MAMIX zone also continues to show good continuity and our confidence in it is growing. MAR-145A and ATR-110 both intersected the MAMIX zone at the expected depth and with strong grades providing approximately 150m of vertical (200m downhole) depth extension beyond the limits of the 2020 PEA pit limits.
“Several drill holes on the eastern flank of the deposit offer the strong possibility of extending the MRE, a result which has been consistently seen across the first 6,300m of infill drilling. We look forward to the updated MRE which will provide an indication of the scale increase we can expect for the MOD.”
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