Scout Drilling Results Extend Polymetallic Mineralization Footprints at Chita; Exploration Identifies Compelling Regional Targets TORONTO, ONTARIO - Minsud Resources Corp. (TSX -V: MSR) (“Minsud” or the “Company”), i s pleased to announce the significant results received from its on-going
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TSX-V: MSR
July 29, 2025
Scout Drilling Results Extend Polymetallic Mineralization Footprints at
Chita; Exploration Identifies Compelling Regional Targets
TORONTO, ONTARIO - Minsud Resources Corp. (TSX -V: MSR) (“Minsud” or the
“Company”), i s pleased to announce the significant results received from its on-going
drilling campaign at the Chita Valley Project in San Juan, Argentina. The active drilling
program focuses on testing the extents of the NI43-101-compliant resource at the
Chinchillones polymetallic (Cu-Au-Mo-Zn-Pb-Ag) deposit and the supergene-enriched
PSU (Porphyry Chita Sur) porphyry Cu-Mo-Au deposit. These two deposits are open-
pittable and are just two kilometers apart.
The active scout drilling program is also testing other compelling regional targets
generated from ground- based exploration surveys . The robust exploration program
employs detailed mapping in conjunction with rock sampling, Pole Dipole IP surveys
and grid soil geochemistry.
Summary of the drilling results is sh own in Table 1 below and drillhole locations are
shown in Maps 1 and 2.
KEY DRILL RESULTS HIGHLIGHTS:
• At Chinchillones surrounds, the drillholes completed include CHDH25-150,
CHDH25-151, CHDH25 -152 which tested and confirmed the southwest
continuity of the NE-trending, 2.0km-long and 0.9km -wide polymetallic zone.
This zone host s the High Zinc resource base portion of the Chi nchillones
polymetallic deposit ( see 43-101 Technical report Mineral Resource Estimate
for Chita valley Project dated January 17, 2025).
The High Zinc polymetallic resource, forming an important component to the
overall Chinchillones deposit, has been reported to contain at both indicated
and inferred categories of 41 Mt (0.72% Zn, 17.6 g/t Ag, 0.13 g/t Au and 0.18%
Cu) and 79 Mt (0.79% Zn, 16.5 g/t Ag, 0.10 g/t Au and 0.21% Cu), respectively.
At CHDH25-151 (150°azimuth and 65° dip; total depth of 500.8m ),
mineralization from 152m to 320m is dominantly hosted in silicified sandstones
(quartzites from Agua Negra Formation) and dacitic breccias. The sulfides,
consisting of pyrite, sphalerite, tennantite occur as disseminations and in quartz
veins. Mineralization is accompanied by pervasive kaolinite- illite-fine-grained
clays.
At CHDH25- 152 ( 135°azimuth and 60°dip;total depth of 600m), the discrete
polymetallic veins yielded high -grade values of up to 756 g/t Ag, 1.08 g/t Au,
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4.5% Zn, and 2.75% Pb (2m-interval sample from 70m), implying increasing
silver endowment to the southwest, which is still largely untested by drilling and
outside of the open- pit limit design. Host rocks include dacitic lithologies with
associated hydrothermal breccias intruded into silicified quartzites.
Drillholes CHDH25 -153 and CHDH25-154 were drilled 240m NE of the last
fence of drillholes included in the maiden Chinchillones resource estimate.
Drillhole CHDH25 -153 (150°azimuth and 65°dip; total depth of 492.6m)
intersected mainly andesitic rocks and early diorite porphyry cut by intermediate
sulfidation quartz -rhodochrosite veins with pyrite- sphalerite-chalcopyrite-
galena-tennantite. Increased vein densities were observed in the intervals 180-
210m and 300-330m.
Drillhole CHDH25 -154 (320°azimuth and 60°dip; total depth of 510m)
intersected lithologies similar to CHDH25 -153 dominated by fine- grained
andesitic rocks. Mineralization occurs as pervasive disseminations, as cavity -
infill, as veins and linear vein breccias and along fractures. Veins contain
rhodochrosite, sphalerite, galena, tennantite and chalcopyrite. Vein density
increased at 100-120m, and 200-220m. Advanced argillic alteration consisting
of secondary silica-pyrophyllite-kaolinite and pyrite generally accompanies the
mineralization.
Thus, the polymetallic zone is demonstrably open to the SW and NE directions.
• At PSU (Chita Porphyry South) Surrounds, drillhole PSUDH25-155 is the
first of the planned drillholes focused on expanding and in-filling the supergene-
enriched, open- pittable PSU historical resource base (indicated resource
category of 33Mt @0.43% Cu, 180 ppm Mo, 0.07 g/t Au and 2.28 g/t Ag and
inferred category of 8.6Mt@ 0.4% Cu, 160 ppm Mo, 0.07 g/t Au and 1.73 g/t Ag
(from NI 43-101 Technical report and Updated Mineral Resource Estimate on
the Chita Valley Project, San Juan, 2018).
Drillhole PSUDH25-155 (315° azimuth and 60° dip; total depth of 321m), which
is 120m outside of the projected 0.25% Cu isosurface derived from the historical
resource estimation, intersected oxidised and argillic -altered dioritic porphyry
(kaolinite-clays-illite) with abundant quartz -sulfides veining. Pyrite and
chalcopyrite are replaced by chalcocite-digenite below the oxide zone at 53m.
Quartz-molybdenite-chalcopyrite-pyrite veinlets become common from 124m.
Thus, the 32m @ 0.34% Cu and 58 ppm Mo within a wider interval of 120m @
0.21% Cu and 77 ppm Mo from 22m demonstrated that the resource base of
the supergene- enriched, open- pittable PSU deposit has the potential to be
substantially expanded and upgraded.
Drillhole PSUDH25 -156 (315°azimuth and 60°dip; total depth of 261m)
intersected highly oxidi sed (jarosite- goethite) diorite porphyry to 53m and at
depth, transitional to a sulfidic zone hosting porphyry -related veinlets (quartz-
pyrite-chalcopyrite-molybdenite; B- and D-type veins) with the sulfides replaced
by chalcocite and digenite. At 142m, the dioritic porphyry body is traversed by
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quartz stockworked zone of white mica -quartz-pyrite-chalcopyrite-molybdenite
altered dacitic intrusion.
Drillhole PSUDH-157 (315°azimuth and60°dip; total depth of 252m) intersected
dioritic porphyry from 3m characterised by a mixed zone of iron oxides (jarosite-
goethite-hematite) with preserved sulfidic veins hosting pyrite-chalcopyrite and
molybdenite. From 45m, the chalcocite- digenite replacement of sulfides
become apparent. At depth from 98m through to 252m (end of hole) the
lithologies become multi -phased with dacitic, andesitic and dioritic intrusion
phases hosting copper sulfides.
Drillhole PSUDH- 158 ( 135°azimuth and 60°dip ; total depth of 314.2m)
confirmed the extension of the higher-grade molybdenum zone (>200 ppm Mo)
hosted in diorite porphyry and affected by supergene chalcocite-digenite in the
mixed oxide-sulfide zone commencing from 25m through to 84m below surface.
Thence through to the end of the drillhole, the dioritic host rocks exhibit phyllic
(white mica-quartz-pyrite) overprint over potassic (secondary biotite-K-feldspar-
magnetite) hosting quartz-molybdenite-chalcopyrite stockworked quartz
veining (B-type porphyry-related veinlets).
The total iron mapped from Landsat 8 imageries (see Map 2 below)
demonstrates coherent available total iron over PSU and extends farther south
for at least 1.7 kilometres along strike. This significant total iron footprint is also
coincident with structurally perturbed area, along the hanging wall to the NS -
trending thrust fault, providing ideal environment for the development and
transport of acidic fluids required for the dissolution and enrichment (vertical or
lateral transport) of copper -bearing sul fides in the weathered profile.
Interestingly, the high total Fe also affected the older Permian granitoids
immediately to the east.
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Table 1: Scout Diamond Drilling Program – Summary of Significant Results
Hole ID
From To Length (1) Cu Au Ag Mo Pb Zn
(mt) (mt) (mts) % g/t g/t ppm ppm ppm
CHDH25-150 254 258 4 0.48 0.13 11.54 4 88 663
28 52 24 0.3 0.1 20.22 63 218 350
CHDH25-151 170.2 329 158.8 0.09 0.06 7.22 8 702 3137
389 396 7 1.51 0.25 58.84 10 1298 4063
69.5 74 4.5 0.13 0.28 176.68 3 6328 10516
CHDH25-152 92 94 2 0.04 0.38 99.62 2 3535 17368
214 218 4 0.06 0.16 39.03 4 9928 31788
489 494 5 0.02 0.06 17.38 1 1579 12745
CHDH25-153 180 208 28 0.03 0.07 1.3 1 35 7821
300 326 26 0.32 0.13 10.72 2 90 281
106 118 12 0.12 0.13 13.04 1 541 1133
CHDH25-154 202 218 16 0.16 0.03 3.96 1 160 558
294 298 4 0.24 0.11 26.79 3 194 1341
PSUDH25-155 22 142 120 0.21 0.09 1.47 77 7 49
Inc 42 74 32 0.34 0.13 3.12 58 12 33
PSUDH25-156 52.8 110 57.2 0.17 0.05 1.39 83 10 17
PSUDH25-157 46 102 56 0.19 0.06 2.91 62 14 58
PSUDH25-158 38 108 70 0.24 0.02 0.47 237 5 23
152 314.2 162.2 0.13 0.03 1.28 240 10 102
(1) The true thicknesses are unknown
.
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Map 1. Completed drillholes CHDH25- 150 through to CHDH25-154 shown relative to the outlines of
the estimated High Zn resource ( indicated and inferred categories consist of 291 kt contained Zn with
grades of 0.72% Zn, 17.6 g/t Ag, 0.13 g/t Au and 0.18% Cu and 616 kt contained Zn with grades of
0.79% Zn, 16.5 g/t Ag, 0.10 g/t Au and 0.21% Cu, respectivel y) in conjunction with the pit outline
employed in the resource estimation. The polymetallic zone is delineated based on drillcore assays and
drillcore logging.
Drill core Photograph 1. CHDH25-151/70.2m. High-grade argentiferous polymetallic vein breccia
hosting secondary silica- rhodochrosite-sulfides (sphalerite- galena-Au-Ag tellurides). The 2m-drill
interval including this 25cm drillcore yielded 756 g/t Ag, 4.5% Zn and 1.1 g/t Au.
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Map 2. Chita South (PSU) porphyry Cu- Mo-Au deposit illustrating the location of the drillholes
PSUDH25-155-PSUDH25-158 reported here, projected to surface >0,25% Cu and >200 ppm Mo
isosurfaces, location of drilled holes and the drillholes planned (average 300m) at the Chita resource
in-fill and expansion program. The base map is the total Fe obtained from Landsat 8 bands combination
and emphasizes extensive available iron (from sulfides).
Total Fe%
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REGIONAL TARGETING HIGHLIGHTS
o Extensive geological, geophysical and geochemical synthesis confirms
highly prospective >>6km -long, >2.0km -wide, ENE- to NE -trending
polymetallic Miocene-aged corridor (Map 3)
The detailed mapping at the Placetas area confirmed the presence of coeval
dioritic and dacitic lithologies, similar to the host rocks hosting the Chinchillones
polymetallic deposit. At Chinchillones, the high sulfidation mineralization,
polymetallic intermediate sulfidation veins, linear breccias and porphyry-related
B-, A -, C -type veins are apparently controlled by NE -, EW -trending faults
occurring in a NE-trending, 2.0km-long and 0.9km-wide elongated polymetallic
zone. These controlling structures, considered as potentially fluid and magma
pathways, are also present at the Placetas area.
• At Placetas Central, compelling drill-ready targets (Map 4)
The results from the grid soil survey (206 samples;100m interval grid) highlights
coherent coincident, at least 1km -long, 0.5km -wide Cu -Mo-Au anomalies.
Importantly these multi -element anomalies coincide with an ENE -trending
faulted zone separating the dioritic rocks in the NW with the dacitic rocks in the
SE. This setting is highly reminiscent to the controls at the Chinchillones
polymetallic deposit
There is a significant fault -controlled EW-t rending magnetite -destructive
elongated “doughnut” coincident with a mapped dioritic porphyry intrusion,
emplaced amongst an older, bigger dioritic body. This mapped younger body is
interpreted to represent a protruded dyke coming off a younger, productive
intrusion at depth.
• At PSU Surrounds, valid targets to test continuity of Cu-Mo-Au
mineralization and the presence of other intrusion centres (Maps 5 and 6)
The compiled surface geochemistry, magnetic -depleted zones and mapping
around the PSU area indicate the southern area to the PSU requires drill -
testing. The under -tested southern continuation of the s upergene-enriched
PSU (Porphyry Chita Sur) Cu -Mo-Au deposit measures 1.7km x 1.4km which
can host substantial deposit/s.
The total iron mapped from Landsat 8 imageries demonstrates coherent
available total iron over the PSU surrounds and extends farther south for more
than one kilometre.
NEXT STEPS:
• Completion of the planned 5400m PSU expansion drilling
• A planned US$7.3 million budget from July 2025- June 2026 will include these
exploratory activities:
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o an MT survey over 13,5kms x 8.0kms area encompassing all the principal
target areas
o testing of the compelling drill- worthy targets at Placetas Central and PSU
south prospect areas
o expanded soil and rock geochemical survey, in conjunction with detailed
mapping of the Chinchillones-Placetas corridor
o Identification of targets based on the thorough integration of the results from
geology-geochemical and geophysical surveys
Map 3. Highly prospective Chinchillones -Placetas corridor with the polymetallic zone at the
Chinchillones polymetallic deposit and the copper soil geochemistry over the Miocene- aged Placetas
Central porphyry Cu- Mo-Au prospect. The TMIRTP image highlights a 650m -diameter Placetas
intrusion complex and other adjacent, probable intrusion centers represented by m agnetic highs. At
Placetas Central, there is a significant fault-controlled EW-trending magnetite-destructive zone forming
an elongated magnetics “doughnut.”