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Southern Silver Intersects 10.5 metres averaging 1,115g/t AgEq at Cerro Las Minitas Project in Durango, México

Drill Results

Southern Silver Intersects 10.5 metres

averaging 1,115g/t AgEq at Cerro Las Minitas

Project in Durango, México

Vancouver, British Columbia--(Newsfile Corp. - December 1, 2025) -

Southern Silver Exploration

Corp.

(TSXV: SSV) (the "Company" or "Southern Silver") reports today that rush assays from initial

drilling on the recently acquired Puro Corazon claim have returned near surface Bonanza-grade silver

mineralization from thick, semi-massive to massive-sulphide replacements in a hanging-wall lens

outside of the main skarn target.

The highlight assays were returned from hole

25CLM-203

and include:

10.5 metre interval (estimated true thickness)

averaging

560g/t Ag

, 0.1g/t Au, 0.1% Cu,

11.2% Pb

and

12.3% Zn

(1,115g/t AgEq),

including a

3.4 metre interval (estimated true

thickness)

averaging

1,067g/t Ag

, 0.2g/t Au, 0.2% Cu,

20.0% Pb

and

19.1% Zn

(

1,982g/t

AgEq

)

(1)

located within 200 metres of surface; and

two narrower, high-grade intercepts occurring several metres down hole from the highlight intercept

(above), which composite to a

2.6 metre interval (estimated true thickness)

averaging

143g/t

Ag

,

4.8% Pb

and

1.5%% Zn

(

280g/t AgEq

)

(1)

located a further 6 metres down hole.

(1)

see AgEq calculation criteria in notes to Table 1.

The replacement interval contains semi-massive to massive sulphides with up to 40% sphalerite (zinc),

30% galena (lead) and lesser pyrite with silver mineralization most strongly correlated to the galena

content and represents a carbonate replacement hosted in limestone sitting outside of the main skarn

zone and the historic Puro Corazon workings. Several additional mineralized zones were intersected

deeper in drill hole

25CLM-203

including intervals of variably mineralized skarn. The intervals have been

sampled and submitted for analyses; assays remain pending and will be released upon receipt.

In addition, step-out holes from

25CLM-203

have intersected similar replacement-style massive to semi-

massive sulphide intercepts both laterally and at depth.

These intervals have been logged and sampled,

with assays pending.

Vice President of Exploration, Rob Macdonald stated

"We're off to a strong start at Puro Corazon.

These initial bonanza-grade silver intercepts confirm the near surface, high-grade nature of the

mineralization and the overall prospectivity of the recently acquired Puro Corazon claim. With

approximately 40% of the planned drilling program completed, I expect more positive exploration

results through the first quarter of 2026."

Assays from drill hole

25CLM-202

were also received and identified mineralized skarn located adjacent

to the historic Santo Nino workings which are located to the north of the Puro Corazon claim boundary

and on the larger CLM property. Highlights include:

a

2.4 metre interval (estimated true thickness)

averaging

62g/t Ag, 3.0% Pb

and

5.2% Zn

(273g/t AgEq)

.

These are the first set of assays released from the Puro Corazon drilling program.

As of this writing, ten

of the proposed twenty-one holes are now complete for a total of 4,000 metres, with three holes currently

in progress. Approximately 12,000 metres of drilling is planned to test the Puro Corazon claim both

laterally and to depths of up to 450 metres below surface. Drilling continues on the property with less than

40% of the proposed 21-hole drill program having been completed to date, the Company anticipates

significant news flow from this current drill program through Q1 2026.

Figure 1: Plan view of the drilling on the recently acquired Puro Corazon Claim.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/5344/276315_a2d850b8a49cca2f_002full.jpg

The Company also reports that it has initiated an underground sampling program in the historic Puro

Corazon workings. Up to 2000 individual channel samples are planned throughout the 13 different mine

levels of the Puro Corazon mine. The sampling will be utilized to inform updated resource models from

the mine area as well as establish potential site for future bulk-sampling of the mineralization. Sampling

has started and results will be reported as assays are received.

Next Steps

The Company is planning to incorporate the results of the Puro Corazon drilling program into the much

larger Cerro Las Minitas project to significantly enhance the project economics. Final assays are

expected to be received by the end of the first quarter of 2026, after which the Company intends to:

update the Mineral Resource Estimate of the Cerro Las Minitas project; followed by

an update of the Preliminary economic Assessment ("PEA") of the project in accordance with the

provisions of National Instrument 43-101.

The Company reports that work on the Cerro Las Minitas project continues advancing numerous upside

opportunities identified subsequent to the July 2024 PEA, while also derisking and advancing the project

with the commencement of baseline data collection, hydrology, geotechnical, archaeological and land

surveys and studies.

As currently modelled, the Cerro Las Minitas project features a large-scale underground mining

operation with robust project economics and high gross revenues in a well located and mining friendly

jurisdiction in southeast Durango, Mexico. For more information on the details of the current economic

assessment of the Cerro Las Minitas project please refer to Southern Silver's news release dated June

10, 2024.

Table 1: Select Assay Results from the Cerro Las Minitas project.

Collar Data

Est. True

Hole #

Az

Dip

Depth

From

To

Interval

Thickness

Ag

Au

Cu

Pb

Zn

AgEq

ZnEq

Notes

Deg

Deg

(m)

(m)

(m)

(m)

(m)

(g/t)

(g/t)

(%)

(%)

(%)

(g/t)

(%)

25CLM-202

59.0

-47.0

369.0

236.0

244.6

8.7

7.0

40

0.0

0.0

1.7

2.7

148

5.5

inc.

237.0

240.0

2.9

2.4

62

0.0

0.1

3.0

5.2

266

9.9

ASSAYS

PENDING

25CLM-203

59.0

-47.0

399.0

244.7

258.0

13.4

10.5

560

0.1

0.1

11.2

12.3

1115

41.6

inc.

244.7

249.0

4.3

3.4

1067

0.2

0.2

20.0

19.1

1982

74.0

25CLM-203

59.0

-47.0

399.0

262.7

266.0

3.4

2.6

143

0.0

0.1

4.8

1.5

280

10.4

68.6%

Dilution

inc.

262.7

263.0

0.4

0.3

396

0.0

0.0

7.2

5.8

691

25.8

and inc.

265.3

266.0

0.7

0.6

443

0.1

0.3

17.6

3.6

903

33.7

ASSAYS

PENDING

1)

Analyzed by FA/AA for gold and ICP-AES by ALS Laboratories, North Vancouver, BC. Silver

(>100ppm), copper, lead and zinc (>1%) overlimits assayed by ore grade ICP analysis,

2)

High silver overlimits (>1500g/t Ag) and gold overlimits (>10g/t Au) re-assayed with FA-Grav. High Pb

(>20%) and Zn (>30%) overlimits assayed by titration. AgEq and ZnEq were calculated using prices of

$2,800/oz Au, $32/oz Ag, $4.50/lb Cu, $0.95/lb Pb and $1.25/lb Zn.

3)

AgEq and ZnEq calculations utilized relative metallurgical recoveries of Au 48.6%, Ag 93%, Cu 70%,

Pb 87% and Zn 93%.

4)

Composites are calculated using a 80g/t AgEq cut-off in sulphide and 0.5g/t AuEq in the oxide gold

zone. Composites have <20% internal dilution, except where noted; anomalous intercepts are calculated

using a 10g/t AgEq cut-off.

About Southern Silver Exploration Corp.

Southern Silver Exploration Corp. is an exploration and development company with a focus on the

discovery of world-class mineral deposits either directly or through joint-venture relationships in mineral

properties in major jurisdictions. Our specific emphasis is the 100% owned Cerro Las Minitas silver-

lead-zinc project located in the heart of Mexico's Faja de Plata, which hosts multiple world-class mineral

deposits such as Penasquito, Los Gatos, San Martin, Naica and Pitarrilla. We have assembled a team

of highly experienced technical, operational and transactional professionals to support our exploration

efforts in developing the Cerro Las Minitas project into a premier, high-grade, silver-lead-zinc mine.

Located in the same State as the Cerro Las Minitas property is the newly acquired Nazas, gold-silver

property. Our property portfolio also includes the Oro porphyry copper-gold project and the Hermanas

gold-silver vein project where permitting applications for the conduct of a drill program is underway, both

located in southern New Mexico, USA.

Robert Macdonald, MSc. P.Geo, is a Qualified Person as defined by National Instrument 43-101 and

supervised directly the collection of the data from the CLM project that is reported in this disclosure and

is responsible for the presentation of the technical information in this disclosure.

On behalf of the Board of Directors

"Lawrence Page"

Lawrence Page, K.C.

President & Director, Southern Silver Exploration Corp.

For further information, please visit Southern Silver's website at

southernsilverexploration.com

or contact

us at 604.641.2759 or by email at

[email protected]

.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the

policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this

release.

This news release contains forward-looking statements. Forward-looking statements address future

events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ

materially from those currently anticipated in such statements. Forward-looking statements in this

news release include plans to advance and develop the CLM property including updating the Mineral

Resource Estimate followed by an update of the PEA. These statements are based on a number of

assumptions, including, but not limited to, general economic conditions, interest rates, commodity

markets, regulatory and governmental approvals for the Company's projects, and the availability of

financing for the Company's development projects on reasonable terms.

Factors that could cause

actual results to differ materially from those in forward looking statements include the timing and

receipt of government and regulatory approvals, and continued availability of capital and financing

and general economic, market or business conditions.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/276315