Vicuña Exploration Update: Filo Sur Project - positive initial results from the New Filon Alunita and Rincon prospects
Mogotes Metals Inc
#401, 217 Queen St W
Toronto, ON M5V0R2
Canada
T + 1 (647) 846- 3313
NEWS RELEASE: 8th July 2024
Vicuña Exploration Update: Filo Sur Project - positive initial results from
the New Filon Alunita and Rincon prospects
July 8th, 2024: Mogotes Metals Inc. (TSXV: MOG) (“Mogotes”, or the “Company”) is pleased to provide an exploration
update and announce positive initial rock chip assay results from the Filo Sur project, adjoining the world class Filo del
Sol Cu-Au-Ag High Sulfidation Epithermal (HSE) and Porphyry (PCD) project in the Vicuna District, Argentina (Figure
1).
• 2,185 m of diamond core drilling completed in 3 holes during shortened February to May 2024 campaign
• Geological observations from the first drill test at Nueva Colorida Breccia and Cruz del Sur targets and drilling
at Frontera prospect that was suspended due to early onset of winter – Assays results pending
• Initial rock chips results confirm Au-Ag-Cu mineralization at new Filo Alunita and Rincon prospects
o Filo Alunita a newly identified 1.6 km trend of silica-alunite alteration. Mogotes rock chip assay of
4.3 g/t Au and >100 g/t Ag, highlights potential HSE prospect, not recognized by previous explorers.
o Rincon 2.3 km long trend defined by Mogotes soil, rock chip assay and geophysics, returns assays
of up to 1.35 g/t Au, 825 ppm Cu and 142 ppm Mo, correlating to +100 m wide high intensity
sheeted veinlet trend, also not recognized by previous explorers
CEO, Allen Sabet, stated: “Mogotes is very happy to have initiated the first drilling campaign at the prospective Filo Sur
project in over decade. Notwithstanding a far shorter than planned exploration season due to unseasonally early arrival
of winter conditions (effecting many explorers in the Andes this year), our team successfully drilled 2,185 meters of
diamond core providing an initial test at 3 of our 9 prospects.
Holes were completed at Cruz del Sur, Nueva Colorida pipe, and a third hole was started at Frontera, but suspended at
a depth of 520m well before the planned depth, with clear down hole mineralization vectors established. We are
encouraged by this initial drilling, as all holes intersected extensive alteration, veining and visible copper and, or base
metal sulphides, consistent with large scale porphyry / epithermal mineral systems.
Assay results from this drilling are pending. Images of the mineralization and technical descriptions are enclosed in
this release (see Appendix 1) and are already providing valuable vectors to guide our next drill holes.
It is important to highlight that the majority of our priority targets remain undrilled, as the field season was cut short.
In addition, our team has discovered two completely new areas of mineralization at Filon Alunita and Rincon,
confirmed by encouraging initial rock chip assays. Results from additional sampling are pending. It is the company’s
view that further exploration has the potential to see these prospects develop into new attractive drill targets at Filon
Alunita and Rincon.
Mogotes is looking forward to updating investors with results as they come to hand and returning to the project in the
southern hemisphere spring (September – October 2024) to continue exploration of this prospective project.
NEXT STEPS:
- Webinar discussion on key target areas (this week)
- Assay results from initial rock chip sampling at new Rincon target
- Assay results from initial drill holes at Nueva Colorida, Cruz del Sur and Frontera prospects
- Recommence exploration program – inclusive of surface exploration and first drill test of several priority targets, is
planned for the southern hemisphere spring of October 2024
Appendix 1: Technical Update on Filo Sur Prospects
Nueva Colorida HSE Breccia Pipe and Colorida - Frontera PCD Cu-Mo Prospects
Frontera – Colorida prospect is characterized by superimposed large-scale alteration / mineral systems (Figure 2) defined by
1) A 2.4 sq km phyllic alteration zone with variable intensity porphyry quartz stockworking that combined is
interpreted as the upper phyllic zone of a shallowly eroded Cu – Mo (Au) PCD system(s) and;
2) A widespread subhorizontal advanced argillic (AA) to argillic alteration overprint (probably telescoping) mapped by
the WV3 processing, centered on the recently recognized Nueva Colorida breccia pipe with AA alteration and HSE
sulphide assemblage in the matrix. The diameter of the Nueva Colorida pipe is not yet well constrained but is in
excess of 600 m based on outcrop and recent drill intersections.
The Frontera-Colorida alteration and mineralization is open, extending to the west under alteration plateau toward the Filon
Alunita HSE Au-Ag prospect and to the east and northeast under recent gravel cover toward the Mucho Muerto Fault zone.
Drilling has been conducted at Frontera and Colorida in campaigns between 2012 and 2013 by Vale, intersecting broad
zones of low-grade porphyry Cu-Mo mineralization (Mogotes NI43101 Technical Report April 2024). Mogotes geophysics,
surface mapping and systematic soil sampling has highlighted that these prospects have not be en optimally drill tested by
previous explorers, with key areas of outcropping porphyry style stockworking, Cu-Mo soil anomalies and attractive
geophysical anomalies, undrilled (Mogotes NI43101 Technical Report April 2024).
At surface, copper mineralization is interpreted to have been partially leached by supergene, and also potentially hypogene
leaching, related to the advanced argillic alteration overprint. Mo is less subject to leaching and so is considered a good
exploration vector and indicator of the hypogene mineralization.
Mogotes rock chip assay results received in February 2024 have further enhanced the prospectivity of these targets with
widespread strongly anomalous Cu and Mo assays returned. Better Cu assays at Frontera correlate to a zone of outcropping
A and B style porphyry stock work and sheeted veining with some areas of secondary copper “bloom ” (Figure 2). Frontera
Cu rock chip assays range from 21 to 3,910 ppm, with an average of the top 10% of 733 ppm Cu (Figure 2).
At Colorida, higher grade Cu rock chip assays “halo” the Nueva Colorida pipe where widespread variable intensity porphyry
style stockwork veining along with several areas of supergene Cu “bloom” are noted. Colorida Cu assays show a vector
toward the northeast where there has been no drilling and where the prospect trends under recent gravel cover. Cu rock
chip assays at Colorida range from 17 to 2,040 ppm, with an average of the top 10% of 682 ppm Cu (Figure 2).
Mo is strongly anomalous across Colorida-Frontera prospects ranging from 0.5 to 6,350 ppm, with the average of the top
10% at Frontera of 733 ppm Mo, and the average of the top 10% at Colorida of 45.7 ppm Mo.
Mogotes initiated drilling at the Nueva Colorida and Frontera prospects in April 2024. Drilling was terminated due to the
early onset of winter conditions in mid April 2024, with 2 holes drilled totaling 1,709 m. Drill hole FSDDH002 was drilled at
the Nueva Colorida prospect toward the northwest at -70.8º dip, reaching a planned depth of 1188.65m. Hole FSDDH003
was drilled toward the west at -64.4º dip reaching 520m of the planned +1000m depth before the hole was shut down and
the camp winterized. Assay results from this drilling are pending but anticipated to be received in coming weeks.
Drill Hole FSDDH002 provides an initial test of the interpreted Nueva Colorida breccia pipe and a portion of a large
underlying MT conductivity anomaly. The first segment of this drill hole (~20 to ~835 m) intersected approximately 815 m of
hydrothermal breccia with advanced argillic alteration and HSE Cu – Mo sulphide assemblage (Figure 3). Then, from 835 m
to the end of the drill hole, it intersects two units of intra-mineral porphyries which are unlikely to be the source of the
breccia or mineralization (Figure 3).
The hydrothermal breccia is polymictic in character with angular to subrounded clasts and moderate to intense advanced
argillic alteration. The matrix is mainly composed of silica + anhydrite (now gypsum) + clays ± alunite ± native sulphur. Hand
lens based estimates of sulphide assemblage in the matrix show that pyrite is the dominant sulphide, ranging from 1 to 30 %
w i t h a n a v e r a g e o f ~ 3 %, with a subordinate high sulfidation assemblage of bornite, enargite, sphalerite, covellite and
chalcopyrite. Numerous breccia clasts have pre -brecciation A-type veins of quartz, pyrite ± bornite and B -type veins quartz
+ pyrite + molybdenite that are presumed to be sourced from underlying porphyry mineralisation that was crosscut by the
breccia during ascent.1
Visual estimates of sulphide percentages suggest assays results are unlikely to return significant intervals of “ore grade” like
Cu and Mo mineralization. However, Mogotes is very encouraged by the visual results of this hole that has only tested the
outer edge of a large HSE breccia pipe and demonstrates the presence of a high level, mineralized Cu-Mo PCD system at the
project. Combined with the surface rock chip results, alteration patterns and geophysical anomalies provide vectors and outline
untested targets for drill testing for 2024-25 spring – summer exploration program.
Frontera drill hole FSD DH003 was designed to test for higher grade porphyry Cu -Mo (Au) mineralization to depth beneath
combined stockwork, alteration, geochemical and geophysical anomalies that all suggest the current outcrop level at the
1 For information regarding B-type and D-type veins, please refer to the terms reported in “Gustafson-Hunt, 1975;
“The Porphyry Deposits at El Salvador, Chile”; Econ. Geol. Vol 70, No 5.”
prospect represents an outer phyllic alteration shell of a concealed porphyry system with an advanced argillic HSE overprint
(probably telescoping).
The drill hole reached a depth of 520 m within an interbed sequence of rhyolites and dacites presumed to be the Permo-
Triassic age Choiyoi Group (Kay et al., 1989; Linares, 2007) wall rocks at the prospect, with only short intervals of andesti c
dykes, suggesting the causative Miocene age porphyry system lies at depth or laterally under cover.
Moderate to intense quartz + sericite + pyrite phyllic alteration dominants the drill hole with biotite-magnetite potassic alteration
logged in 1.4 to 22m intervals within the dykes and wall rock from approximately 230 m down hole to the base of hole. Argillic
to advanced argillic alteration is seen as an overprint on the phyillic and potassic alteration between 2 to 57 m and 118 to 140
m down hole.
The pyrite is present throughout most of the hole, ranging from 0.5 to 25 % with an average of 2 % mainly as D -type veins,
but also appears in anhydrite veins which may also have enargite (0.5 to 5%) and scarce sphalerite. At ~61, 120, and 393 m
there are veins of 5 to 6 cm thick massive sulfides composed of pyrite + enargite. Molybdenite is present as disseminations
(0.5 to 1 %) in fine (5 mm average) B-type quartz veins (0.5 to 1 %) observed from 304 m to the end of the drill hole.
The drill hole was terminated at 520 m due to the onset of winter conditions, well above the planned final depth of 1200 m.
Assay are pending, however alteration and the transition of phyllic to potassic and pyrite ± enargite veins D veins to quartz -
molybdenite-pyrite B veins from 304 m down hole supports the proposal that the hole is still in the upper phyllic halo of a
porphyry Cu-Mo system with a vector down hole and to the west. Additionally, the presence of advanced argillic alteration
confirms the proposal that there is alteration telescoping in in the Frontera – Colorida system. This process can increase Cu
(± Au) grades associated with the porphyry system by introducing high- sulfidation ore minerals (Sillitoe, 2010; Sillitoe and
Perelló, 2023), in this case enargite and covellite.
Continuing this drill hole to planned depth will be a priority for the 2024- 25 spring – summer exploration program.
Filon Alunita Prospect
Filon Alunita is a previously unrecognized, approximately 1.6 km long, NE trending zone of alunite-kaolinite responses first
recognised in Mogotes 2023 WV3 satellite alteration mapping. Filon Alunita is located approximately 1 km to the west of the
Colorida- Frontera prospects, possibly representing the HSE halo to this large PCD Cu-Mo-(Au) center (Figure 2).
Mogotes Metals acquired additional adjoining claims extending into Chile to secure the SW extension of the Filon Alunita
trend before initiating ground checking of the trend in February 2024. Follow-up has confirmed the presence of submeter
to over 10m wide hydrothermal silica-alunite breccias and vuggy silica zones outcrop along the trend that are considered
prospective for HSE style Au-Ag-Cu mineralization (Figures 4a & 4b).
There is no historic rock chip sampling or drilling and only patchy IP geophysics coverage from a historic Vale 2011 survey
focused over the prospect. Reprocessing of this IP data hints at high order resistivity anomalies associated with the Filon
Alunita trend that may represent drill targets for larger concealed vuggy silica zones. A single rock chip was collected on the
NE end of the Filon Alunita trend by Mogotes reconnaissance mapping team in 2022-23. This sample assayed 4.3 g/t Au,
>100 g/t Ag and 550 ppm Cu with an Sb - As signature consistent with HSE epithermal interpretation of this prospect,
suggesting the Filon Alunita zone may develop into an attractive Au – Ag HSE target.
Mapping, systematic rock chip sampling (trenching) and IP geophysics are a priority for the Filon Alunita prospect, following
by drill testing of permissive targets is a priority for the Mogotes 2024-25 spring – summer exploration program.
Camino and Rincon Porphyry and HSE Cu-Mo-Au Trend
Camino and Rincon are new high priority prospects recognized by Mogotes Metals in 2023 (Mogotes NI 43 101, November
2023) that, combined, define a 3.9 km long north - south trend of alteration, Cu-Au-Mo in soils and rock chips, and
geophysical anomalies (Figure 5). There has been no drilling of targets along the Camino – Rincon trend by previous
explorers. Mogotes exploration of these prospects is at a very early stage, however results to date are considered
encouraging.
WV3 alteration processing and reconnaissance geological mapping along the Camino – Rincon trend defines a corridor of
phyllic, intermediate argillic and propylitic alteration with strong centers of overprinting jarosite (Figure 5a). This alteration
signature suggests that the current surface outcrop level may represent the upper levels of a shallowly eroded Cu – Au – Mo
PCD and HSE trend of mineralization.
Mogotes soil sampling has outlined a +3.0 km long coincident zone of anomalous Au-Cu-Mo (Figure 5b) broadly correlating
with the alteration and geophysical trend. The soil anomaly continues to the south of the WV3 alteration anomaly, extending
to the Rincon prospect where thin cover had obscured the WV3 alteration signature.
Assay results have been received from Mogotes semicontinuous chip channel sampling along the Rincon access roads. This
has highlighted a 210 m long section of continuously anomalous Cu-Au-Mo–Pb–Zn (Table 1) with peak assays from 83
samples of Au 1.35 g/t and Cu 825, Mo 142, Pb 724, Zn 1,380 ppm.
Table 1: Rincon Roadcut rock chip samples statistics
n:83 Au ppm
ICP21
Cu ppm
ME-ICP61
Mo ppm
ME-
ICP61
Pb ppm
ME-ICP61
Zn ppm
ME-
ICP61
Min 0.03 66 2 10 36
Max 1.35 825 142 724 1,380
Average of
Top 10% 0.38 507 66.8 396 588
This anomalous geochemistry correlates to a zone of propylitic to phyllic altered volcanics and small diorite to dacite stocks
with early hydrothermal magnetite veining and quartz veinlets locally defining zones of intense sheeted veinlets with
sporadic fine sulphides and or supergene Cu staining (Figure 6a).
Prospecting has highlighted outcrop and float of quartz-pyrite-enargite veining at site T1 (Figure 6b) and trenching at site T2
has exposed a 105 m wide zone of variable high intensity sheeted quartz veinlets with sporadic supergene Cu staining
(Figure 6c). Rock chip assays from the southern extension of the Rincon prospect are pending but infer the potential for a
1.0 km long north-south corridor of veining with anomalous Au-Cu-Mo-Pb-Zn. Mogotes Rincon Au-Cu-Mo soil anomaly
suggests that this trend may extend a further 1.3 km to the south of the T2 trench.