Minsud encounters 527.7m at 0.26% Cu, 9.70 g/t Ag, and 0.16% Zn, including 8m at 3.85% Cu, 188.6 g/t Ag, and 1.28% Zn at Chinchillones
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Drilling has resumed on the infill drilling program covering an area of approximately 2.5 square kilometres, for the purpose of generating a Mineral Resource Estimate on the Property. This area represents the primary mineralized zone within the Chinchillones target, as delineated through drilling.
From
Key highlights and associated figures are provided below. Drilling results are summarized in Table 1. Drillhole locations are shown in Map 1.
CHDH24-102 was drilled with an orientation of 315°/-65° to a depth of 743.70 metres:
-
Significant Drill Intercepts:
- 527.7m @ 0.26% Cu, 9.70 g/t Ag and 0.16% Zn, from 216m depth.
- including 8.0m @ 3.85% Cu, 188.60 g/t Ag, and 1.28% Zn, from 386.0m depth.
-
Geology:
- The drillhole was comprised of intercalated phreatomagmatic breccia and fine to medium- grained porphyritic dacite. The dacitic, matrix supported, polymictic breccia contains porphyritic dacite and quartzite clasts. There is moderate to strong advanced argillic alteration (kaolinite- pyrophyllite) affecting the matrix and clasts. Disseminated sulphide mineralisation is ubiquitous with numerous high sulphidation veins containing estimated 3-5% pyrite-bornite-sphalerite-tennantite. From 391m, there are consistent sulphides occurring as disseminations, cavity in-fill, and veins. Both intermediate sulphidation (IS) and high sulphidation veins are present.
- This intercept has established potential continuity and increased volume of similar higher-grade intercepts from CHDH23-84, CHDH23-89, and CHDH23-69 (see PR releases dated
May 8, 2023 andNovember 20, 2023 ). The strong mineralization is interpreted as largely associated with a superposed high sulphidation event over the earlier porphyry Mo-Cu body at depth. - o Cu-Au-As mineralization is clearly aligned NNW on the eastern edge of the Dome.
CHDH24-103 was drilled with an orientation of 315°/-65° to a depth of 850 metres:
-
Significant Drill Intercepts:
- 384.0m @ 0.33% Cu, 5.85 g/t Ag, 85 ppm Mo, from 466.0m depth.
- including 15.0m @ 2.47% Cu, 0.22 g/t Au, 30.13 g/t Ag, and 0.159% Zn, from 548m depth.
-
Geology:
- This drillhole is located 150m NW from CHDH24-102. Up to 414.0m, host rocks include clast-supported, phreatomagmatic breccias containing mineralized clasts of dacitic porphyry, quartzites and early diorite porphyry. The lithologies are moderately to strongly silicified, with abundant high sulphidation veins. Linear breccias are overprinted by earlier moderate quartz-sericite alteration. Up to 5% modal estimate of sulphides.
- From 414.0m, the diorite porphyry variably hosts moderate to strong zoned quartz-sericite alteration. Pyrophyllite is observed in fractures and high sulphidation veins, with locally up to 3-5% total sulphides (pyrite-tennantite-sphalerite). Stockwork vein zone is characterised by dense microveins hosting sulphides in a spectrum of porphyry and epithermal veins (i.e., high sulfidation, B- and A-type, and pyrite veins).
- From 692.3m, the tonalite porphyry exhibits moderate quartz-sericite alteration with a quartz-sulfide stockwork zone (20-25 vein/m frequency) consisting of B-type, pyrite, and HS veins with pyrite-bornite-chalcopyrite microveinlets associated with HS veins. Up to 7% modal estimated sulphides within these high-grade intervals (pyrite-chalcopyrite-bornite-tennantite-molybdenite). Bornite appears in HS and B-type veins and disseminated in quartz veins.
Chichillones Infill Drilling Program Update
MSA continues the Chinchillones infill drilling program covering an area of approximately 2.5 square kilometres, for the purpose of generating a mineral resource estimate on the Property.
The program comprises 27,488 metres of diamond drilling, distributed in 32 drillholes. A total of 13 drillholes totaling 9,838 metres (CHDH23-86 to CHDH23-98) were completed by the end of 2023, while an additional 8,856m in 14 drillholes was completed during the first half of 2024, for a total of 18,694 metres completed to date in the infill program. Grid interval/hole spacing is currently set at approximately 100 metres. The average depth of the planned drilling is approximately 800 metres.
Continued infill drilling program was mainly concentrated in the SW-NE corridor at the eastern end of the Chinchillones target. Drilling tested the lateral and depth continuity of the higher-grade Cu-Au body intersected from previously reported drillholes CHDH23-73 and CHDH23-62. Further drilling is intended to outline the geometry of this Cu-Au body, with CHDH22-62 to -69 and CHDH23-96 associated with the eastern edge of the dome. The remainder of the infill program of approximately 17,650 metres is expected to be completed by Q3 2024.
Completed 2024 Roadmap Items:
- Flotation metallurgical testing at ALS Kamloops is ongoing. These metallurgical tests are a prerequisite for a maiden resource estimate on the Chinchillones polymetallic deposit discovery.
- Terraspec. TIMA, micro-XRF and QXRD mineralogical studies have been completed in representative samples from the 2023 drillholes.
Ongoing 2024 Roadmap Items:
- Continuation of the remainder of the infill program of approximately 17,650 metres, expected to be completed by Q3 2024.
- Outline the geometry of the high-grade Cu-Au body identified in CHDH22-62 through CHDH23-69 and CHDH23-96, associated with the eastern edge of the Dome.
- Continuation of metallurgical testing on representative domains. Establish high, medium, and low-grade domains for metallurgical and recovery testing.
- Continuation of mineralogical studies, Terraspec, TIMA, and QXRD on samples.
- Beginning in Q4 2024, continue with the development of new Exploration Targets identified during geological mapping surveys completed in 2023.
- Completion of an NI 43-101 resource estimate at the Chinchillones area within the
Chita Valley Project by the end of Q4.
Table 1: Phase IV Diamond Drilling Program – Summary of Results
Hole ID |
From (m) |
To (m) |
Interval (m) |
Cu (%) |
Au (g/t) |
Ag (g/t) |
Mo |
Pb |
Zn |
CHDH23-99 |
228.00 |
386.00 |
158.00 |
0.18 % |
0.11 |
8.96 |
9 |
672 |
6912 |
Inc |
292.00 |
362.00 |
70.00 |
0.30 % |
0.15 |
11.79 |
10 |
232 |
11594 |
|
404.00 |
756.00 |
352.00 |
0.15 % |
0.08 |
2.42 |
54 |
34 |
470 |
CHDH23-100 |
422.00 |
558.00 |
136.00 |
0.11 % |
0.16 |
9.82 |
7 |
1319 |
6904 |
Inc |
460.00 |
498.00 |
38.00 |
0.02 % |
0.07 |
6.16 |
3 |
1741 |
9073 |
|
572.00 |
672.00 |
100.00 |
0.54 % |
0.28 |
4.09 |
21 |
76 |
253 |
Inc |
628.00 |
672.00 |
44.00 |
0.89 % |
0.44 |
3.69 |
32 |
46 |
212 |
|
774.00 |
827.60 |
53.60 |
0.25 % |
0.06 |
2.16 |
137 |
25 |
239 |
CHDH23-101 |
66.00 |
134.00 |
68.00 |
0.11 % |
0.10 |
11.96 |
30 |
963 |
2882 |
|
176.00 |
340.00 |
164.00 |
0.07 % |
0.05 |
1.27 |
50 |
41 |
246 |
CHDH23-102 |
216.00 |
743.70 |
527.70 |
0.26 % |
0.05 |
9.70 |
50 |
422 |
1621 |
Inc |
386.00 |
394.00 |
8.00 |
3.85 % |
0.36 |
188.60 |
5 |
2840 |
12787 |
CHDH23-103 |
55.00 |
242.00 |
187.00 |
0.12 % |
0.09 |
13.46 |
58 |
548 |
4307 |
|
466.00 |
850.00 |
384.00 |
0.33 % |
0.05 |
5.85 |
85 |
193 |
683 |
Inc |
548.00 |
563.00 |
15.00 |
2.47 % |
0.22 |
30.13 |
47 |
281 |
1588 |
* intervals reported in the above table are not true thicknesses
Quality Assurance/Quality Control
All core samples were submitted to the
Qualified Person (QP) Statement
Case Lewis,
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