Silver Tiger Reports ON Current and Proposed Exploration ON Veins North and South of the Historic El Tigre MINE
NEWS RELEASE
SILVER TIGER REPORTS ON CURRENT AND PROPOSED EXPLORATION ON VEINS
NORTH AND SOUTH OF THE HISTORIC EL TIGRE MINE
HALIFAX, NOVA SCOTIA – August 13, 2025 – Silver Tiger Metals Inc. (TSXV:SLVR and
OTCQX:SLVTF) ("Silver Tiger" or the “Corporation”) is pleased to announce preliminary results from its
2025 Summer Exploration Program on the prospective Northern Veins, located 2 kilometers North of the
historic El Tigre Mine and outlines initial exploration plans to test several undrilled greenfield areas on the
Southern Veins on its 100% owned, silver -gold El Tigre Project (the "Project" or "El Tigre") located in
Sonora, Mexico. Current exploration work consists of mapping and sampling both surface and historic
underground workings to define drill ready targets for Q4-2025.
Glenn Jessome, President & CEO stated "As we get nearer to making a construction decision for the open
pit portion of the El Tigre Project and with our technical team nearing completion of the underground PEA
in coming weeks , we are advancing our summer exploration program. We are currently exploring the
prospective area north of the historic El Tigre Mine through focused mapping and sampling of both historic
core and underground workings. We will soon begin similar exploration on the Southern Veins.”
Mr. Jessome further stated, “The Northern Veins, a faulted offset of the veins at the historic El Tigre Mine,
show the same structure, mineralogy, grades and orientations as the well-defined veins around the historic
El Tigre Mine on which our PFS and pending underground PEA are based. With the initial 10 kilometers
of mapped vein strike length we have to the North and recent assay results we are disclosing today, we see
the potential to drill these Northern Veins in our Winter 2025 program.”
Exploration Objectives 2025
• Begin drilling on Northern Veins in Q4-2025
• Generate drill targets in the Southern Veins at Lluvia de Oro , La Mancha and El Toro through
analysis of old mining works
• With 2 5 kilometers of mapped vein strike complete, which is 50% of the project area, the
Corporation intends to increase mapping coverage to 70%
Overview – Veins
The El Tigre historic mine district is located in Sonora, Mexico and lies at the northern end of the Sierra
Madre silver and gold belt which hosts many epithermal silver and gold deposits, including Dolores, Santa
Elena and Las Chispas. The high-grade epithermal veins dip steeply to the west, and are typically 0.5 metres
wide, and locally can be up to 5 metres in width. Over 25 kilometers of these veins at El Tigre have been
mapped along strike on surface. Based on the extensive historic workings, the veins are inferred to extend
to more than 450 metres depth with many veins reaching strike length of 3 kilometers or more. At the El
Tigre property there are both brownfields and greenfields targets defined by extensive Silver Tiger drilling.
Silver Tiger has found over 60 small-scale workings in addition to the historic El Tigre Mine.
The El Tigre Mine Veins contain over 90% of the Corporation’s Measured and Indicated Resource and is
the focus area of the PFS and pending PEA. The El Tigre Vein, the Seitz Kelly Vein and the Sooy Vein
(the “El Tigre Mine Veins”) have over 10 kilometers of combined vein strike length of which only 50% is
drill tested. Gold was first discovered in 1896 with mining beginning soon after on the El Tigre Mine Veins
(Figure 1). Significant underground mining took place with over 32 kilometers of development completed
before mine closure with a reported 353,000 ounces of gold and 67.4 million ounces of silver extracted at
an average grade of over 2 kilograms silver equivalent per ton. The Corporation’s Drill Hole ET-21-264,
returned assays up to 82,827.3 g/t silver equivalent over 0.5 metres proximal to historically mining stopes,
showing high-grade vein mineralization continues at depth and along strike (see the Corporation’s press
release dated Nov 9, 2021).
Figure 1: El Tigre Project - Northern and Southern Exploration Targets
The Northern Vein Area has over 10 kilometers of combined strike length confirmed by surface mapping
and sampling, drilling and the presence of underground workings mainly on the Fundadora, Protectora and
Caleigh Veins. This area is considered brownfields with 15% of the mapped strike of veins being drilled.
These veins are the faulted offset of the El Tigre Mine Veins and exhibit the same structure, mineralogy,
grades, orientations, strike length and width (1 -2 metres) as the well -defined El Tigre Mine Veins that
account for bulk of the Corporation’s Mineral Resource Estimate.
The Southern Veins which includes Lluvia de Oro, La Mancha and El Toro is considered greenfields with
veins striking for over 10 kilometers and no drilling ever conducted on this area. This prospective area is
evidenced by historic working s and high -grade channel sampling . The El Toro, Lluvia de Oro and La
Mancha Veins are hosted in the El Tigre Formation, a permissive formation that is the host for the
Stockwork Zone, which is the basis of the Company’s PFS (see the Corporation’s Press Release dated
October 22, 2024).
Figure 2: Current Sampling of Historic Workings – Northern Veins
Northern Veins - 2025 Summer Exploration Plan – Brownfields Targets
Exploration crews have begun to locate, catalog, map and sample historic adits and drifts in the Northern
Veins (Figure 2). This work is aimed at confirming the geological similarities of the Northern Vein
mineralized systems to the well-established El Tigre, Seitz-Kelly and Sooy Veins. Once assessment of the
historic workings is complete all adits and drifts will be scanned with a LiDAR -capable drone. For the
remainder of the summer, Silver Tiger will continue to define targets to drill in Q4-2025.
After surveying the tunnels, the geologists mapped the veins and then collected chip samples across the
veins at intervals between 3 to 5 metres along the length of the tunnel. The samples were chipped with a
rock hammer across the face of the vein exposed in the tunnel. The minimum length of the samples was
0.50 metres, and the samples weighed approximately 3 to 5 kg. Sampling was stopped at either the end of
the tunnel or when access was restricted due to ground conditions. Of the 110 chip samples collected, the
chip sample assay results received to date are set out in the table below (see Table 1 and Figure 2 for
Sample Location).
As work progresses on the Northern Veins, exploration crews will begin analysing Lluvia de Oro, La
Mancha and El Toro on the Southern Veins.
Table 1: Significant Channel Samples on Northern Veins
Vein Channel
ID
Samples From To Interval(1) Sample
#
Au Ag AgEq(2)
m m m g/t g/t g/t
Fundadora ETL-2078 Composite: ETS-4847/4848/4849 0.0 1.6 1.6 3 0.15 464 476
Fundadora ETL-2078 Including: ETS-4849 1.1 1.6 0.5 1 0.24 654 672
Fundadora ETL-2079 Composite: ETS-4853/4853 0.0 0.8 0.8 2 0.40 95 118
Notes:1) Not true width.; 2) Silver Equivalent (“AgEq”) ratios are based on a silver to gold price ratio of 75:1 (Au:Ag).
Reconnaissance drilling was conducted on the Northern veins by the Company in 2017 and 2020, before
shifting focus to the development of the El Tigre Mine Veins. Significant veins were consistently
intercepted in the North (Table 2) proving the continuity and grade seen in the underground historic
workings. Anaconda (c. 1982-83) completed a 250 metre exploration drift on the Northern Veins (Figure
4).
Table 2: Historic Significant Intercepts in Northern Veins
Hole ID Comment From
m
To
m
Length
(1)
Au g/t Ag g/t AgEq (2)
g/t g/t g/t
ET-83-015 Fundadora Vein 172.4 173.5 1.1 14.38 537.7 1,616.1
Including 172.4 173.0 0.60 24.40 913.0 2,743.0
ET-17-144 Caleigh Vein 88.3 91.4 3.15 10.10 1,990.9 2,748.4
Including 88.3 89.1 0.85 37.20 7,338.9 10,128.9
ET-20-158 Caleigh Vein 89.1 91.2 2.10 1.46 280.5 390.1
including 90.0 90.7 0.70 4.09 815.0 1,121.6
ET-20-163 Protectora Vein 10.0 18.4 8.40 0.42 165.5 197.1
Including 16.9 17.4 0.50 3.56 1,782.0 2,049.1
ET-20-164 Protectora Vein 17.0 28.4 11.40 0.66 87.1 136.8
Including 17.0 17.5 0.50 10.50 805.0 1,592.5
ET-20-193 Benjamin Vein 114.0 119.5 5.50 0.08 726.l 732.2
Including 116.5 119.5 3.00 0.09 1,303.2 1,310.1
Notes:1) Not true width.; 2) Silver Equivalent (“AgEq”) ratios are based on a silver to gold price ratio of 75:1 (Au:Ag).
The Northern Veins consist of both historically mined veins including the Protectora and Fundadora (Figure
3); and veins discovered by the Corporation including the Benjamin and Caleigh (see the Corporation’s
Press Releases dated Sept 10, 2020 and Nov 17, 2020).
Figure 3 : Plan View El Tigre Project– Northern Veins
Caleigh Vein
Discovered in 2020 by the Corporation, the Caleigh Vein is the highest grade of the Northern Veins with,
for example, DDH ET-17-144 returning assays at 10,129 g/t silver equivalent over 0.85 metres (Table 2).
The Caleigh Vein is mapped on surface for 1.2 kilometers with only 25% of the vein drill tested.
Benjamin Vein and Black Shale
The newly discovery Benjamin Vein has been mapped on surface for 1 kilometer, with only 25% drill
tested. Drill hole DDH ET-20-193 returned assays at 1,310 g/t silver equivalent over 3.0 metres (Table
2). The Benjamin Vein also hosts significant Black Shale style mineralization that is seen in the El Tigre
Mine Veins.
Fundadora Vein – Northern Veins
This vein was intermittently mined during the time of the El Tigre Mine (c. 1892-1930) and therefore
hosts many small workings including a 250+ metre exploration drift constructed by Anaconda Mining in
1982 (Figure 4). Drilling assays confirm the high grade seen in channel sampling in a 2020 program, with
DDH ET-83-015 returning assays at 2,743 g/t silver equivalent over 0.6 metres (Table 2). The Fundadora
Vein has been mapped over 2 kilometers on surface with only 15% of the vein drill tested.
Figure 4: Plan View –Historic UG Sampling and Mapping Fundadora Workings
Protectora Vein – Northern Veins
The Protectora Vein extends along strike for 2 kilometers and from its position, dip. and strike it can be
considered the north extension of the Sooy Vein. This vein has only been drill tested for 15% of the mapped
strike length. Like the Fundadora vein, this vein was mined historically as The Palomita Mine and the North
Tigre Mine. Drilling assays confirm the high grade seen in channel sampling in a 2020 program, with DDH
ET-20-163 returning assays at 2,049 g/t silver equivalent over 0.5 metres (Table 2).
Figure 4: Historic Workings Exploration – Protectora Vein
Southern Veins - Lluvia De Oro, La Mancha and El Toro – Greenfields Target
Reconnaissance mapping and sampling was conducted in the Lluvia de Oro Area by the Company in 2016
and 2020. The El Toro and La Mancha Veins, while mapped, remain unsampled.
Significant historic underground workings (greater than 500 metres in length) were found in Lluvia de Oro
with grab sampling completed in a 2020 program returning assays up to 1.90 g/t gold and 1,300 g/t silver
(Figure 5). Importantly, the Lluvia de Oro vein system is contained within the El Tigre formation, the host
to the Stockwork Zone of which the Corporation’s 2024 PFS is centered. There is potential to extend open
pit mineralization from the far south of the proprosed open pit south towards Lluvia de Oro.
Figure 5: Plan View El Tigre Project– Lluvia de Oro - Southern Veins
Table 3: Drillhole Locations for Significant Intercepts – Northern Veins
Hole/Channel
ID Easting Northing Elevation Azimuth Dip Length
ET-83-015 670,320.0 3,387,317.9 2054.9 91 -61 187.7
ET-17-144 670,678.9 3,386,642.0 2001.5 90 -45 224.0
ET-20-158 670,678.8 3,386,646.9 1999.4 90 -45 131.2
ET-20-163 670,827.8 3,386,689.9 2020.0 90 -25 61.0
ET-20-164 670,825.9 3,386,689.9 2019.6 90 -45 114.4
ET-20-193 670,390.0 3,386,120.8 1935.6 90 -50 186.1
ETL-2078 670,471.0 3,387,332.0 2124.0 270 -14 2.7
ETL-2079 670,471.0 3,387,330.0 2123.0 230 15 0.8
Underground Preliminary Economic Assessment Update
The Company’s Technical Team and lead consultants (P&E Mining), are near completion of underground
PEA with expected release in Q3-2025. The underground PEA is centered on the high-grade Vein, Sulfide
and Shale Zones. Final process flow diagram design and costing are in process with initial cost (CAPEX)
and operational expenditures (OPEX) established, and metallurgical and geotechnical studies complete.
Open Pit Update
The Company is preparing for a construction decision of the Open Pit portion of the El Tigre Project.
Kappes, Cassiday & Associates (KCA) of Reno, experts in heap leach design, have been retained for a
Detailed Engineering to Process Study. WSP has completed the preliminary Engineering to Heap Leach
and Ponds.
About Silver Tiger and the El Tigre Historic Mine District
Silver Tiger Metals Inc. is a Canadian company whose management has more than 27 years’ experience
discovering, financing, and building large hydrothermal gold and silver mines in Mexico. Silver Tiger’s
100% owned 28,414 hectare Historic El Tigre Mining Di strict is located in Sonora, Mexico. Principled
environmental, social and governance practices are core priorities at Silver Tiger.
Silver Tiger commenced work on its El Tigre Project in 2017. Silver Tiger has drilled over 150,000 metres
at the El Tigre Project, with 119,000 metres completed since 2020. Silver Tiger has completed a maiden
MRE in 2017 and MRE updates in 2023 and 2024. The PEA for the El Tigre open pit was released in
November 2023.
The 2024 PFS for the El Tigre open pit delivered robust economics. The PFS projects an After -Tax NPV
of US$222 million at a 5% discount rate, an After -Tax IRR of 40.0%, and a payback period of 2.0 years.
This open pit operation is expected to have a 10-year mine life. The El Tigre project delivers a life of mine
undiscounted After-Tax Cash Flow of US$318 million, with initial capital costs of $86.8 million (including
$9.3 million in contingency). Operating cash costs are projected at $973/oz AuEq and $12/oz AgEq, with
AISC at $1,214/oz AuEq and $14/oz AgEq. The economics of the Project have been evaluated based on a
discounted $26/oz silver price and gold price of $2,150/oz.
A PEA for the permitted underground mineral resource is expected to be released in Q3-2025.
VRIFY Slide Deck and 3D Presentation – Silver Tiger’s El Tigre Project
VRIFY is a platform being used by companies to communicate with investors using 360° virtual tours of
remote mining assets, 3D models and interactive presentations. VRIFY can be accessed by website and
with the VRIFY iOS and Android apps.
Access the Silver Tiger Metals Inc. Company Profile on VRIFY at: https://vrify.com