Marimaca Copper Corp. (TSX: MARI) is pleased to announce further results from the 2022 infill and extensional drilling campaign. Results reflect a total of 4,068m across 20 drill holes.
The drilling intersected broad zones of near-surface green copper oxide mineralization in 19 of the 20 drill holes. Drilling was focused on infilling the higher-grade central core of the MOD, and the MAMIX depth-extension zone discovered in the 2021 drilling campaign (see press release dated October 14, 2021). As with previous results (see announcements dated June 13, 2022, May 19, 2022, and May 10, 2022), drilling continues to demonstrate the excellent thickness and continuity of the mineralized column at the Marimaca Oxide Deposit (MOD).
Highlights
MOD Infill
MAMIX Infill
Sergio Rivera, VP Exploration of Marimaca Copper, commented:
“We have now completed the drilling planned to be captured in the 2022 MRE update, which includes all the planned MAMIX and peripheral drill holes targeting resource growth.
Results continue to be in-line with our geological interpretation at the MOD, with the excellent grade and vertical continuity of the Marimaca system demonstrated again in this latest batch of results. The 2022 infill campaign has been an important de-risking milestone for Marimaca as our confidence in the ore body continues to improve.”
Overview of Drilling Campaign Objectives
Marimaca’s 2022 drilling campaign consists of over 32,000m of planned drilling between the MOD infill and the MAMIX zone, the depth extension of the MOD. Both programs will support an updated Mineral Resource Estimate planned for late Q3 2022.
Results from the infill and MAMIX program continue to return positive results. Drilling released in today’s announcement was largely targeted at infilling and improving confidence in the higher-grade central portion of the MOD and the MAMIX depth extension below. The higher grade, green oxide core is located from surface and continues into the MAMIX zone to depths of up to 462m – the deepest drilled at the MOD to date. The near-surface, higher grade green oxide zones are accessible in the early years of the PEA mine plan (see announcement dated August 4 2020) with the 2022 infill drilling program targeting conversion of the Inferred-category resources to Measured & Indicated level.
Figure 1: Plan View of Infill Drilling Results, Planned Holes and MOD PEA Pit Shell is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/b5c7a9ff-c3cc-4585-a16d-3d78f0378c8a
Table 1. Summary of Infill Drill Results
Hole | From | To | m | % CuT | |
ATR-112 | 4 | 122 | 118 | 0.96 | |
including | 4 | 30 | 26 | 0.30 | |
and | 66 | 122 | 56 | 1.85 | |
MAR-152 | 2 | 34 | 32 | 0.14 | |
50 | 68 | 18 | 0.11 | ||
160 | 190 | 30 | 0.27 | ||
MAR-154 | 10 | 48 | 38 | 0.17 | |
including | 32 | 48 | 16 | 0.23 | |
80 | 120 | 40 | 0.11 | ||
MAR-155 | 6 | 78 | 72 | 0.35 | |
including | 30 | 78 | 48 | 0.49 | |
including | 30 | 56 | 26 | 0.82 | |
150 | 190 | 40 | 0.11 | ||
MAR-156 | 0 | 230 | 230 | 0.53 | |
including | 0 | 10 | 10 | 0.28 | |
and | 34 | 136 | 102 | 0.85 | |
and | 154 | 210 | 56 | 0.48 | |
MAR-157 | 120 | 198 | 78 | 0.12 | |
Table 2. Summary of MAMIX Drill Results
Hole | New/Historic | From | To | m | %CuT | |
MAR-151 | New | 22 | 288 | 266 | 0.34 | |
including | 22 | 74 | 52 | 0.45 | ||
and | 130 | 174 | 44 | 0.38 | ||
and | 186 | 288 | 102 | 0.43 | ||
200 | 300 | 100 | 0.42 | |||
including | 230 | 258 | 28 | 0.58 | ||
MAR-153 | New | 28 | 244 | 216 | 0.40 | |
including | 90 | 186 | 96 | 0.73 | ||
and | 228 | 244 | 16 | 0.2 | ||
MAR-43 EXT | Historic + New | 4 | 376 | 372 | 0.20 | |
New | 248 | 328 | 80 | 0.17 | ||
New | including | 278 | 316 | 38 | 0.24 | |
New | and | 354 | 376 | 22 | 0.15 | |
MAR-69 EXT | Historic + New | 10 | 388 | 378 | 0.28 | |
New | 206 | 388 | 182 | 0.10 | ||
New | including | 312 | 330 | 18 | 0.20 | |
MAR-25 EXT | Historic + New | 2 | 424 | 422 | 0.48 | |
New | 314 | 424 | 110 | 0.34 | ||
New | including | 332 | 384 | 52 | 0.63 | |
MAR-45 EXT | Historic + New | 0 | 400 | 400 | 0.46 | |
New | 202 | 384 | 182 | 0.13 | ||
New | including | 202 | 244 | 42 | 0.26 | |
New | and | 352 | 370 | 18 | 0.19 | |
MAR-68 EXT | Historic + New | 2 | 386 | 384 | 0.64 | |
New | 250 | 386 | 136 | 0.69 | ||
New | including | 250 | 352 | 102 | 0.88 | |
New | and | 430 | 440 | 10 | 0.24 | |
MAR-21 EXT | Historic + New | 4 | 352 | 348 | 0.24 | |
New | 300 | 352 | 52 | 0.13 | ||
MAR-13 EXT | Historic + New | 8 | 400 | 392 | 0.26 | |
New | 150 | 172 | 22 | 0.20 | ||
New | 202 | 400 | 198 | 0.13 | ||
New | including | 202 | 236 | 34 | 0.20 | |
New | and | 274 | 288 | 14 | 0.32 | |
New | and | 354 | 400 | 46 | 0.16 | |
MAR-63 EXT | Historic + New | 4 | 268 | 264 | 0.27 | |
New | 204 | 268 | 64 | 0.10 | ||
MAR-20 EXT | Historic + New | 0 | 274 | 274 | 0.49 | |
New | 252 | 274 | 22 | 0.12 | ||
MAR-23 EXT | Historic + New | 14 | 450 | 436 | 0.38 | |
New | 354 | 450 | 96 | 0.71 | ||
New | including | 354 | 366 | 12 | 0.40 | |
New | and | 392 | 450 | 58 | 1.07 | |
MAR-07 EXT | Historic + New | 18 | 286 | 268 | 0.42 | |
New | 222 | 286 | 64 | 0.33 | ||
New | including | 222 | 256 | 34 | 0.51 | |
New | and | 270 | 286 | 16 | 0.21 | |
ATR-81 EXT | Historic + New | 2 | 270 | 268 | 0.37 | |
New | 232 | 270 | 38 | 0.18 | ||
New | including | 256 | 270 | 14 | 0.28 |
Table 3. Infill collars and survey
Hole | Easting | Northing | Elevation | Azimuth | Inclination | Depth |
ATR-112 | 374942.7 | 7435691.4 | 1080.7 | 220 | -60 | 300 |
MAR-152 | 375257.3 | 7434999.4 | 1027.6 | 220 | -60 | 200 |
MAR-154 | 375310.9 | 7434984.0 | 1022.6 | 220 | -60 | 200 |
MAR-155 | 374731.5 | 7435428.6 | 1050.8 | 220 | -60 | 200 |
MAR-156 | 375028.5 | 7435700.7 | 1058.5 | 220 | -60 | 250 |
MAR-157 | 375322.8 | 7435913.5 | 1118.8 | 310 | -60 | 300 |
Table 4. MAMIX collars and survey
Hole | Easting | Northing | Elevation | Azimuth | Inclination | Extension | Final Depth |
MAR-151 | 375184.4 | 7435513.9 | 1120.3 | 310 | -55 | – | 300 |
MAR-153 | 374831.9 | 7435470.3 | 1076.9 | 220 | -60 | – | 350 |
MAR-45-EXT | 374994.2 | 7435645.3 | 1093.5 | 310 | -55 | 200 | 400 |
MAR-63-EXT | 375000.7 | 7435642.2 | 1093.3 | 220 | -60 | 100 | 300 |
MAR-43-EXT | 374933.7 | 7435582.0 | 1124.3 | 310 | -55 | 200 | 400 |
MAR-13-EXT | 375155.0 | 7435148.1 | 1057.6 | 310 | -55 | 250 | 400 |
MAR-20-EXT | 374869.9 | 7435452.1 | 1062.3 | 310 | -55 | 150 | 400 |
MAR-21-EXT | 374967.1 | 7435351.1 | 1066.5 | 310 | -55 | 150 | 450 |
MAR-25-EXT | 375009.7 | 7435379.9 | 1081.5 | 310 | -55 | 150 | 450 |
MAR-23-EXT | 375046.0 | 7435422.6 | 1090.8 | 310 | -55 | 150 | 450 |
MAR-07-EXT | 375115.8 | 7435527.6 | 1113.0 | 310 | -55 | 140 | 350 |
MAR-68-EXT | 374954.1 | 7435615.7 | 1111.4 | 220 | -60 | 200 | 450 |
MAR-69-EXT | 374952.9 | 7435620.9 | 1111.6 | 310 | -60 | 200 | 400 |
ATR-81-EXT | 374993.1 | 7435750.8 | 1040.2 | 220 | -60 | 78 | 278 |
Sampling and Assay Protocol
True widths cannot be determined with the information available at this time. RC holes were sampled on a 2m continuous basis, with dry samples riffle split on site and one quarter sent to the Andes Analytical Assay preparation laboratory in Calama and the pulps then sent to the same company laboratory in Santiago for assaying. A second quarter was stored on site for reference. Samples were prepared using the following standard protocol: drying; crushing to better than 85% passing -10#; homogenizing; splitting; pulverizing a 500-700g subsample to 95% passing -150#; and a 125g split of this sent for assaying. All samples were assayed for %CuT (total copper) and %CuS (acid soluble copper) by AAS. A full QA/QC program, involving insertion of appropriate blanks, standards and duplicates was employed with acceptable results. Pulps and sample rejects are stored by Marimaca Copper for future reference.
Qualified Person
The technical information in this news release, including the information that relates to geology, drilling and mineralization was prepared under the supervision of, or has been reviewed by Sergio Rivera, Vice President of Exploration, Marimaca Copper Corp, a geologist with more than 36 years of experience and a member of the Colegio de Geólogos de Chile and of the Institute of Mining Engineers of Chile, and who is the Qualified Person for the purposes of NI 43-101 responsible for the design and execution of the drilling program.
The QP confirms he has visited the project area, has reviewed relevant project information, is responsible for the information contained in this news release, and consents to its publication.
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