AbraSilver Resource Corp.: AbraSilver Drilling at Diablillos Intercepts Wide Gold Intervals at Oculto East and Broad Silver Intercepts at JAC

Toronto, Ontario--(Newsfile Corp. - September 30, 2025) - AbraSilver Resource Corp. (TSX: ABRA) (OTCQX: ABBRF) ("AbraSilver" or the "Company") is pleased to announce new assay results from six drill holes from the ongoing Phase V exploration program at its wholly-owned Diablillos project in Argentina (the "Project"). These drill holes continue to expand oxide-hosted gold mineralization to the east of the Oculto deposit and oxide silver mineralization within the JAC zone, highlighting the continued strong exploration upside potential across the Diablillos system.

Highlight Drill Results - Widths are reported as drilled lengths; true widths are not yet known.

• Oculto East: Numerous broad zones of continuous gold mineralization intercepted, including:
  • DDH 25-066: 1.0 metre ("m") with bonanza grades of 108.9 g/t gold from 288 m downhole, as well as 18.0 m at 0.97 g/t gold from 353 m
  • DDH 25-069: 24.0 m grading 1.02 g/t gold from 243 m
  • DDH 25-071: 33.0 m grading 0.42 g/t gold from 69 m
  • DDH 25-072: 140.0 m grading 0.57 g/t gold from 262 m, including 8.0 m at 2.60 g/t gold from 338 m
    
    
• JAC: Strong near-surface silver mineralization continues to expand the Mineral Resource potential, including:
  • DDH 25-053: 29.0 m at 65 g/t silver from 85 m, including 7.0 m at 108 g/t silver
  • DDH 25-058: 32.0 m at 100 g/t silver from 58 m, including 2.0 m at 400 g/t silver

John Miniotis, President and CEO, commented, "These latest drill results highlight the strong continuity of wide gold zones at Oculto East, together with additional near-surface silver mineralization at JAC. The potential to expand both gold and silver resources well beyond the current Mineral Resource conceptual open pit further demonstrates the scale of Diablillos and firmly positions us to continue delivering value through ongoing exploration and development."

Dave O'Connor, Chief Geologist, commented, "Drilling at Oculto East continues to confirm broad intervals of gold mineralization to the east, while results at JAC reinforce the presence of thick, continuous silver mineralization to the west. Together, these results highlight the strength and continuity of the Diablillos system and its potential for significant additional Mineral Resource expansion."

Table 1 - Summary of Key Drill Intercepts

Intercepts greater than 25 gram-metres gold or 2,000 gram-metres silver shown in bolded text:

Drill Hole			Area	From (m)	To (m)	Type	Interval (m)	Ag g/t	Au g/t
DDH-25-053			JAC	85.0	114.0	Oxides	29.0	64.6	-
			Including	94.0	101.0	Oxides	7.0	107.7	-
				123.0	143.0	Oxides	20.0	41.1	-
DDH-25-058			JAC	58.0	90.0	Oxides	32.0	99.5	-
			Including	69.0	71.0	Oxides	2.0	400.0	-
				92.0	131.0	Oxides	39.0	35.3	-
DDH-25-066		Oculto East		148.0	151.0	Oxides	3.0	-	0.75
				161.0	163.5	Oxides	2.5	-	0.80
				196.5	202.5	Oxides	6.0	-	2.23
				228.0	230.0	Oxides	2.0	77.5	-
				234.0	253.5	Oxides	19.5	49.6	0.41
				265.0	270.0	Oxides	5.0	27.9	0.51
				274.0	276.0	Oxides	2.0	37.6	0.87
				288.0	289.0	Oxides	1.0	61.8	108.9
				295.0	299.0	Oxides	4.0	18.4	0.90
				353.0	371.0	Oxides	18.0	8.6	0.97
				402.0	404.0	Oxides	2.0	-	0.77
DDH-25-069		Oculto East		234.0	235.0	Oxides	1.0	6.8	1.32
				242.0	266.0	Oxides	24.0	5.3	1.02
				315.0	316.0	Oxides	1.0	4.6	1.08
DDH-25-071		Oculto East		69.0	101.0	Oxides	33.0	-	0.42
				115.0	116.0	Oxides	1.0	11.8	0.86
				127.7	129.0	Oxides	1.3	10.7	1.02
				167.0	168.0	Oxides	1.0	-	0.91
DDH-25-072		Oculto East		166.0	183.0	Oxides	17.0	87.3	0.15
				211.0	213.0	Oxides	2.0	-	0.57
				230.0	234.0	Oxides	4.0	39.7	0.24
				244.0	247.0	Oxides	3.0	-	1.15
				262.0	402.0	Oxides	140.0	8.3	0.57
		Including		338.0	346.0	Oxides	8.0	17.6	2.60

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

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/11792/268423_abrasilverimage1.jpg

Additional Details on Drill Results - Oculto East and JAC

At Oculto East, drilling continues to demonstrate broad, continuous intervals of oxide gold mineralization extending beyond the eastern margin of the current conceptual open pit. Hole DDH 25-072 returned 140.0 m grading 0.57 g/t Au and 8.3 g/t Ag, including a higher-grade interval of 8.0 m at 2.60 g/t Au, while hole DDH 25-066 intersected multiple zones of gold and silver mineralization including 1.0 m at 108.9 g/t Au and 61.8 g/t Ag. Other results, such as 24.0 m grading 1.02 g/t Au in hole DDH 25-069, further highlight the strong continuity and scale of gold mineralization in this area.

Mineralization depicted in Figures 2 and 3 below appears to be within the conceptual pit boundary but is actually situated on the margins. This highlights the strong potential for upgrading mineralization along the pit boundaries to the Measured category and enhancing overall project economics.

Figure 2 - Section Through Latest Drill Holes - at Oculto East Looking East

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/11792/268423_abrasilverimage2.jpg

Note: Widths are drilled widths, not true widths. True widths are unknown.

At the JAC zone, drilling shows that shallow silver mineralization extends beyond the western margin of the conceptual open pit, likely following a structure perpendicular to the main trend. Hole DDH 25-053 intersected 29.0 m grading 65 g/t Ag, including 7.0 m at 108 g/t Ag, and hole DDH 25-058 intersected 32.0 m at 100 g/t Ag, including 2.0 m at 400 g/t Ag. Silver mineralization at JAC remains open to the south and west with potential to extend both the tank and heap leach Mineral Resources in these directions.

Figure 3 - Section Through Latest Drill Holes - at JAC Looking East

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/11792/268423_abrasilverimage3.jpg

Table 2 - Collar Data

Hole Number	UTM Coordinates		Elevation	Azimuth	Dip	Depth (m)	Area
DDH 25-053	719282	7198746	4,138	0	-60	146	JAC
DDH 25-058	719210	7198763	4,135	0	-60	150	JAC
DDH 25-066	720810	7199498	4,395	315	-60	419	Oculto East
DDH 25-069	720777	7199776	4,317	180	-60	329.5	Oculto East
DDH 25-071	720923	7199790	4,345	180	-60	251	Oculto East
DDH 25-072	720757	7199406	4,394	340	-60	419	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 3:

Table 3 - 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 silver and 1.6Moz 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
[e-mail]
Tel: [phone]

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.

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SOURCE: AbraSilver Resource Corp.