AbraSilver Intercepts 274 Metres Grading 0.60 g/t Gold from 251 Metres Depth at Oculto East, Highlighting Potential for an Underlying Porphyry System The intercept includes a high-grade interval of 23 metres grading 2.83 g/t gold
AbraSilver Intercepts 274 Metres Grading 0.60
g/t Gold from 251 Metres Depth at Oculto East,
Highlighting Potential for an Underlying
Porphyry System
The intercept includes a high-grade interval of 23 metres
grading 2.83 g/t gold
Toronto, Ontario--(Newsfile Corp. - December 10, 2025) -
AbraSilver Resource Corp. (TSX: ABRA)
(OTCQX: ABBRF)
("AbraSilver" or the "Company") is pleased to announce new assay results from
three drill holes from the ongoing Phase V exploration program at its wholly-owned Diablillos project in
Argentina (the "Project").
DDH 25-085 at Oculto East intersected a broad
274.0 metre ("m") interval grading 0.60 g/t gold
including a higher-grade 23.0m grading 2.83 g/t gold
, together with copper and molybdenum
mineralization at depth. This intercept reinforces the scale, strength, and multi-phase nature of the
Diablillos mineralizing system. Drilling continues to extend oxide-hosted gold mineralization well beyond
the current conceptual open pit and provides further support for a significant porphyry system underlying
Oculto.
Highlight Drill Results -
Widths are reported as drilled; true widths are not yet known.
Oculto East:
DDH 25-085
is the deepest drill hole completed to date at Oculto. The hole successfully
tested a major structural-intrusive corridor extending beneath Oculto East, intersecting
pervasive silicification, brecciation, and advanced argillic-silicic alteration interpreted to be
related to a larger intrusive at depth. These features are consistent with the upper levels of
well-developed porphyry systems. Results include:
274.0 m grading 0.60 g/t gold
(from 251 m), including:
23.0 m grading 2.83 g/t gold
(from 306 m);
The hole also intersected significant copper and molybdenum values in multiple deeper
sulphide zones, an important vector toward a porphyry center.
DDH 25-083
encountered additional gold mineralization in a transitional oxide-sulphide
zone, along the broad Oculto East structural corridor:
26.0 m grading 0.74 g/t gold
(from 203 m);
DDH 25-082
tested the extension of the Oculto East structural corridor and returned:
12.0 m grading 0.44 g/t gold
(from 275 m).
John Miniotis, President and CEO, commented, "Hole DDH 25-085 marks an important milestone and
underscores the remarkable scale of the Diablillos system. The wide 274-metre gold interval, coupled
with copper and molybdenum intercepts at depth, indicates strong potential well beyond the limits of our
current oxide Mineral Resources. These results reinforce our view that Oculto forms part of a much larger
precious- and base-metal system with substantial additional growth potential."
Dave O'Connor, Chief Geologist, commented, "DDH 25-085 demonstrates mineralization to more than
one kilometre depth and provides clear geological evidence of a vertically extensive system. The deeper
copper-molybdenum-gold mineralization is characteristic of fertile porphyry environments, and the
alteration we encountered is consistent with the upper portions of a significant intrusive center. These
results enhance our geological model and highlight substantial additional exploration potential across the
property."
Table 1 - Summary of Key Drill Intercepts:
Oculto East
Intercepts greater than 25 gram-metres gold shown in bolded text:
Drill Hole
Area
From
(m)
To
(m)
Type
Interval (m)
Ag
g/t
Au
g/t
Cu
%
Mo
ppm
DDH-25-082
Oculto East
275.0
287.0
Oxides
12.0
1.1
0.44
-
-
303.0
305.0
Oxides
2.0
3.4
0.38
-
-
DDH-25-083
Oculto East
172.0
177.0
Oxides
5.0
55.2
0.48
-
-
203.0
229.0
Transition
26.0
14.1
0.74
0.18
-
DDH-25-085
Oculto East
251.0
525.0
Transition
274.0
2.5
0.60
0.06
19
Including
306.0
329.0
Transition
23.0
9.2
2.83
-
-
552.0
572.0
Sulphides
20.0
-
0.16
0.18
101
883.0
891.0
Sulphides
8.0
-
0.53
-
88
1,007.0
1,011.0
Sulphides
4.0
-
0.50
-
157
Note: All results in this news release are rounded. Assays are uncut & undiluted. Widths are drilled widths, not true widths.
True widths are
unknown.
Figure 1 - Plan View of Drill Results
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Additional Details on Drill Results - Oculto East
Drilling at Oculto East continues to confirm a broad, cohesive mineralized corridor extending beyond the
eastern limit of the current Mineral Resource open pit shell.
The high-grade interval in DDH 25-085 (23 m
at 2.83 g/t Au) lies on the same structural trend as hole
DDH 25-024
, which previously returned 31.0 m
grading 9.96 g/t gold and 16.2 g/t silver, highlighting the strong continuity of high-grade gold
mineralization at Oculto East.
Figure 2 - Section Through Latest Drill Holes at Oculto East
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Note: Widths are drilled widths, not true widths.
True widths are unknown.
Figure 3 below is the standard model of alteration related to a porphyry intrusive system as presented by
Dr. Richard Sillitoe
1
. Hole DDH 25-085 terminated in chlorite-sericite alteration, which indicates that the
potentially higher grade potassic zone is being approached. The several porphyritic dacite dykes
intersected in the drill hole are probably related to the progenitor porphyry intrusion.
Figure 3 - Alteration Zones Associated with a Porphyry Intrusive System
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Exploration Update
The Phase V drill program remains on track for completion before year-end.
To date, 60 holes
have been drilled as part of the program and the final six holes will be completed before year-end.
The Company plans to commence a Phase VI drill program totaling approximately 15,000 metres
in January 2026, focusing on Mineral Resource expansion, select deeper porphyry-related targets,
and continued step-outs across the Oculto-JAC mineralized cluster.
Further details will be provided
early in the New Year.
An updated Mineral Resource estimate, incorporating all Phase V drilling, remains scheduled for
H1/2026. This estimate will be used for an updated Mineral Reserve and mine plan that will
underpin the ongoing DFS that will be completed in the same time frame.
A deep drill hole was recently completed at the Cerro Viejo porphyry target, located approximately
4 kilometres northeast of Oculto. Assay results are expected shortly.
Collar Data
Hole Number
UTM Coordinates
Elevation
Azimuth
Dip
Depth (m)
Area
DDH 25-082
721271
7199288
4,595
110
-65
338
Oculto East
DDH 25-083
721041
7200088
4,306
180
-60
245
Oculto East
DDH 25-085
720923
7199790
4,346
180
-60
1,025
Oculto East
About Diablillos
The Diablillos property is located within the Puna region of Argentina, in the southern part of Salta
Province along the border with Catamarca Province, approximately 160 km southwest of the city of Salta
and 375 km northwest of the city of Catamarca. AbraSilver acquired the property in 2016, which
comprises 15 contiguous and overlapping mineral concessions with excellent year-round road access.
Exploration to date has outlined multiple occurrences of silver-gold oxide mineralization at Oculto, JAC,
Laderas, and Fantasma, located within a 500 m to 1.5 km distance surrounding the Oculto/JAC
epicentre. To date, over 150,000 metres have been drilled on the property, which continues to
demonstrate the strong growth potential of shallow, oxide-hosted silver and gold resources.
In addition, a
large porphyry complex is centered approximately 4 km northeast of Oculto which includes outcropping
porphyry intrusions within a major zone of alteration and associated gold rich epithermal mineralization.
Comparatively nearby examples of high sulphidation epithermal deposits include: La Coipa (Chile);
Yanacocha (Peru); El Indio (Chile); Lagunas Nortes/Alto Chicama (Peru) Veladero (Argentina); and Filo
del Sol (Argentina). The most recent Mineral Resource estimate for Diablillos is shown in Table 2:
Table 2 - Diablillos Mineral Resource Estimate - As of July 21, 2025
Zone
Category
Tonnes
(000 t)
Ag
(g/t)
Au
(g/t)
AgEq
(g/t)
Contained Ag
(000 Oz Ag)
Contained Au
(000 Oz Ag)
Contained
AgEq
(000 Oz Ag)
Tank Leach
Oxides
Measured
26,545
119
0.71
183
101,564
604
156,487
Indicated
46,584
56
0.63
114
84,430
948
170,592
Measured &
73,129
79
0.66
139
185,994
1,553
327,078
Indicated
Inferred
9,693
34
0.57
86
10,616
176
26,647
Heap Leach
Oxides
Measured
6,673
16
0.14
25
3,486
30
5,342
Indicated
24,102
12
0.17
23
9,163
133
17,506
Measured &
30,774
13
0.16
23
12,649
162
22,848
Indicated
Inferred
10,024
9
0.20
21
2,811
64
6,850
Total
Oxides
Measured
33,218
98
0.59
152
105,050
634
161,829
Indicated
70,686
41
0.48
83
93,593
1,081
188,098
Measured &
103,904
59
0.51
105
198,643
1,715
349,927
Indicated
Inferred
19,628
21
0.38
53
13,427
241
33,496
Footnotes for Tank Leach Resource:
1
.
Mineral Resources are not Mineral Reserves and have not demonstrated economic viability.
2
.
The formula for calculating AgEq is as follows: Silver Eq Oz = Silver Oz + Gold Oz x (Gold Price/Silver Price) x (Gold Recovery/Silver
Recovery).
3
.
The Mineral Resource model was populated using Ordinary Kriging grade estimation within a three-dimensional block model and mineralized
zones defined by wireframed solids, which are a combination of lithology and alteration domains.
The 1m composite grades were capped
where appropriate.
4
.
The Mineral Resource is reported inside a conceptual Whittle open pit shell derived using US$ 27.50/oz Ag price, US $2,400/oz Au price,
83% process recovery for Ag, and 87% process recovery for Au.
5
.
The constraining open pit optimization parameters used were US $1.94/t mining cost, US $22.96/t processing cost, US $3.32/t G&A cost, and
average 51-degree open pit slopes.
6
.
The MRE has been categorized in accordance with the CIM Definition Standards (CIM, 2014).
7
.
A Net Value per block [NVB] calculation was used to constrain the Mineral Resource, determine the "Benefits = Income-Cost", where,
Income = [(Au Selling Price (US$/oz) - Au Selling Cost (USD/Oz)) x (Au grade (g/t)/31.1035)) x Au Recovery (%)] + [(Ag Selling Price
(US$/oz) - Ag Selling Cost (USD/Oz)) x (Ag grade (g/t)/31.1035)) x Ag Recovery (%)] and Cost = Mining Cost (US$/t) + Process Cost (US$/t)
+ Transport Cost (US$/t) + G&A Cost (US$/t) + [Royalty Cost (%) x Income]
8
.
The Mineral Resource is sub-horizontal with sub-vertical feeders and a reasonable prospect for eventual economic extraction by open pit
and tank leach processing methods.
9
.
In-situ bulk density were assigned to each model domain, according to samples averages for each lithology domain, separated by alteration
zones and subset by oxidation.
10
.
All tonnages reported are dry metric tonnes and ounces of contained gold are troy ounces.
11
.
Mining recovery and dilution factors have not been applied to the Mineral Resource estimates.
12
.
The Mineral Resource was estimated by Luis Rodrigo Peralta, B.Sc., FAusIMM CP (Geo), Independent Qualified Person under NI 43-101.
13
.
Mr. Peralta is not aware of any environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues that could
materially affect the potential development of the Mineral Resource.
14
.
All figures are rounded to reflect the relative accuracy of the estimates. Minor discrepancies may occur due to rounding to appropriate
significant figures.
Footnotes for Heap Leach Resource:
1
.
Mineral Resources are not Mineral Reserves and have not demonstrated economic viability.
2
.
The formula for calculating AgEq is as follows: Silver Eq Oz = Silver Oz + Gold Oz x (Gold Price/Silver Price) x (Gold Recovery/Silver
Recovery).
3
.
The Mineral Resource model was populated using Ordinary Kriging grade estimation within a three-dimensional block model and mineralized
zones defined by wireframed solids, which are a combination of lithology and alteration domains.
The 1m composite grades were capped
where appropriate.
4
.
The Mineral Resource is reported inside a conceptual Whittle open pit shell derived using US$ 27.50/oz Ag price, US $2,400/oz Au price,
80% process recovery for Ag, and 58% process recovery for Au.
5
.
The constraining open pit optimization parameters used and overall operational cost of US $11.31/t.
6
.
The MRE has been categorized in accordance with the CIM Definition Standards (CIM, 2014).
7
.
A Net Value per block [NVB] calculation was used to constrain the Mineral Resource, determine the "Benefits = Income-Cost", where,
Income = [(Au Selling Price (US$/oz) - Au Selling Cost (USD/Oz)) x (Au grade (g/t)/31.1035)) x Au Recovery (%)] + [(Ag Selling Price
(US$/oz) - Ag Selling Cost (USD/Oz)) x (Ag grade (g/t)/31.1035)) x Ag Recovery (%)] and Cost = Mining Cost (US$/t) + Process Cost (US$/t)
+ Transport Cost (US$/t) + G&A Cost (US$/t) + [Royalty Cost (%) x Income]
8
.
In-situ bulk density were assigned to each model domain, according to samples averages for each lithology domain, separated by alteration
zones and subset by oxidation.
9
.
All tonnages reported are dry metric tonnes and ounces of contained gold are troy ounces.
10
.
Mining recovery and dilution factors have not been applied to the Mineral Resource estimates.
11
.
The Mineral Resource was estimated by Mr. Peralta, B.Sc., FAusIMM CP (Geo), Independent Qualified Person under NI 43-101.
12
.
Mr. Peralta is not aware of any environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues that could
materially affect the potential development of the Mineral Resource.
13
.
All figures are rounded to reflect the relative accuracy of the estimates. Minor discrepancies may occur due to rounding to appropriate
significant figures.
QA/QC and Core Sampling Protocols
AbraSilver applies industry standard exploration methodologies and techniques, and all drill core
samples are collected under the supervision of the Company's geologists in accordance with industry
best practices. Drill core is transported from the drill platform to the logging facility where drill data is
compared and verified with the core in the trays. Thereafter, it is logged, photographed, and split by
diamond saw prior to being sampled. Samples are then bagged, and quality control materials are
inserted at regular intervals at site; these include blanks and certified reference materials as well as
duplicate core samples which are collected in order to assess sampling precision and reproducibility.
Groups of samples are then placed in large bags which are sealed with numbered tags in order to
maintain a chain-of-custody during the transport of the samples from the project site to the laboratory.
All samples are received by the ASA (Alex Stewart Argentina) preparation laboratory in Salta, where
they are prepared, then the pulp sachet is directly dispatched to its facility in Mendoza, Argentina, where
they are analyzed. All samples are analyzed using a multi-element technique consisting of a four-acid
digestion followed by ICP/AES detection, and gold is analyzed by 50g Fire Assay with an AAS finish.
Silver results greater than 100g/t are re-analyzed using four acid digestion with an ore grade AAS finish.
Qualified Persons
David O'Connor P.Geo., Chief Geologist for AbraSilver, is the Qualified Person as defined by National
Instrument 43-101 Standards of Disclosure for Mineral Projects, and he has reviewed and approved the
scientific and technical information in this news release.
About AbraSilver
AbraSilver is an advanced-stage exploration company focused on rapidly advancing its 100%-owned
Diablillos silver-gold project in the mining-friendly Salta province of Argentina.
The current Measured and
Indicated Mineral Resource estimate for Diablillos (tank leach-only) consists of 73.1 Mt grading 79 g/t Ag
and 0.66 g/t Au, containing approximately 186Moz of silver and 1.6Moz of gold, with significant further
upside potential based on recent exploration drilling. The Company is led by an experienced
management team and has long-term supportive shareholders. In addition, the Company has an earn-in
option and joint venture agreement with Teck on the La Coipita project, located in the San Juan province
of Argentina.
AbraSilver is listed on the Toronto Stock Exchange under the symbol "ABRA" and in the
U.S. on the OTCQX under the symbol "ABBRF."
For further information please visit the AbraSilver Resource website at
www.abrasilver.com
, our LinkedIn
page at
AbraSilver Resource Corp.
, and follow us on X at
www.x.com/abrasilver
.
Alternatively, please contact:
John Miniotis, President and CEO
Tel: +1 416-306-8334
Cautionary Statements
This news release includes certain "forward-looking statements" under applicable Canadian securities
legislation. Forward-looking statements are necessarily based upon a number of estimates and
assumptions that, while considered reasonable, are subject to known and unknown risks, uncertainties,
and other factors which may cause the actual results and future events to differ materially from those
expressed or implied by such forward-looking statements. All statements that address future plans,
activities, events or developments that the Company believes, expects or anticipates will or may occur
are forward-looking information. There can be no assurance that such statements will prove to be
accurate, as actual results and future events could differ materially from those anticipated in such
statements. Accordingly, readers should not place undue reliance on forward-looking statements. When
considering this forward-looking information, readers should keep in mind the risk factors and other
cautionary statements in the Company's disclosure documents filed with the applicable Canadian
securities regulatory authorities on SEDAR+ at
www.sedarplus.ca
.
The risk factors and other factors
noted in the disclosure documents could cause actual events or results to differ materially from those
described in any forward-looking information. The Company disclaims any intention or obligation to
update or revise any forward-looking statements, whether as a result of new information, future events or
otherwise, except as required by law.
Neither the TSX nor its Regulation Services Provider (as that term is defined in the policies of the
TSX) accepts responsibility for the adequacy or accuracy of this news release
1
https://pyrite.utah.edu/fieldtrips/SEGFperu-2012/Readings/Sillitoe%202010.pdf
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