GRSL.V · 2022-05-24 12:00:00

GR Silver Continues to Deliver Wide, High- grade Drill Results at Plomosas: 6.5 m at 1,458 g/t Ag Including 0.9 m at 3,118 g/t Ag in PLIP22-013

Drill Results

GR Silver Continues to Deliver Wide, High-

grade Drill Results at Plomosas: 6.5 m at 1,458

g/t Ag Including 0.9 m at 3,118 g/t Ag in

PLIP22-013

VANCOUVER, BC

May 24, 2022

/CNW/ -

GR Silver Mining Ltd. ("GR Silver Mining"

or the

"Company")

(TSXV: GRSL) (OTCQB: GRSLF) (FRANKFURT: GPE) – announces high-grade silver

(Ag) results from underground infill drilling at the Plomosas Project in Sinaloa State,

Mexico

. The

results continue to support the potential to increase Ag grades in the Plomosas Mine Area resource.

The drilling targeted high grade Ag mineralization in the upper levels of the underground workings, in

areas where unsampled intervals from historical drill holes within the 2021 resource block model

were previously assigned zero values.

Highlights:

Core drilling, in un-mined shallow areas (up to

160 m

below surface) of the historical

Plomosas Mine, continues to define attractive wide and high-grade Ag mineralization.

Presence of high-grade results with predominance of Ag mineralization only in areas

with potential to increase Ag grade in planned update of resource model, including:

PLIP22-013:

6.5 m

at 1,458 g/t Ag (1,485 g/t AgEq

), including

0.9 m at 3,118 g/t Ag (3,266 g/t AgEq)

PLIP22-012:

14.0 m

at 146 g/t Ag, including

0.4 m at 2,474 g/t Ag (2,542 g/t AgEq)

PLIP22-011:

2.9 m

at 190 g/t Ag, including

0.4 m at 626 g/t Ag

PLIP22-010:

8.3 m

at 100 g/t Ag

Ag mineralization on the hanging wall of the main polymetallic Plomosas Breccia, in the

upper levels of the underground workings, supports the upside potential for Ag grades

in the mineral resource update scheduled for Q1|23.

The combination of systematic underground mapping, 3D modelling of different styles of

mineralization and underground infill drilling at the historic Plomosas Mine has defined

attractive, wide, high-grade gold-silver (Au-Ag) mineralized zones. These new zones will

be incorporated into the upcoming mineral resource block model and estimation.

Recent Ag drill results provide encouragement for the Company to continue drilling

underground at the Plomosas Mine Area in 2022 (Figure 1) with the objective of

significantly increasing the Ag grade in areas of the resource model.

_____________________

See Table 1 footnote

GR Silver Mining Chairman and CEO,

Eric Zaunscherb

commented

"The 2022 infill drill

program at the Plomosas Mine has been carefully designed to address upside potential in the

resource block model. It has been our thesis that historical sampling lacked detail in some

unmined areas resulting in the adoption of zero grade in unsampled drill hole intervals in the

current resource model. This is supported by the observation that current resource model grades

in areas already mined are lower than suggested by historical production grades. Further, it is very

encouraging to see such high-grade Ag results confirming the existence of new, high-grade Ag

zones associated with previously ignored cross-cutting structures. It is highly satisfying to see

further proof of concept on both themes, with the potential for a commensurate re-rating."

Figure 1: Longitudinal Section Plomosas Mine Infill Drilling Results – Ag Block Model (CNW

Group/GR Silver Mining Ltd.)

Plomosas Mine Area - Resource Expansion Program

The underground infill drilling program at the Plomosas Mine Area commenced in

March 2022

and is

ongoing. The drill holes are predominantly short holes planned to target zones where recent

geological mapping identified opportunities to improve the 2021 NI 43-101 mineral resource block

model Ag grade, utilizing areas of the underground development that provide good access.

Underground Infill Drilling - Plomosas Mine

The underground drilling program is designed to, not only address the shortcomings in the 2021

resource model, but also delineate high-grade Ag-Au mineralized zones located between level 775

RL and 1025 RL (see Figure 2). The underground infill drilling program has a surgical approach using

drill rigs with the capacity to drill NQ and BQ diameter holes in selective and tight underground sites,

aiming to drill a total of

4,350 m

by Q4|22.

The existing underground infrastructure within the Plomosas Mine, which includes a total of 7.4 km of

ramps and galleries, provides flexibility and optimization of the program scheduling, avoiding the

need for additional new underground development or long drill holes from surface.

A total of 13 holes have been completed underground to date in 2022. Major highlights from the

initial 13 holes are summarized in Table 1. These intervals confirm consistent high-grade Ag

mineralization and have also delineated new mineralized zones in areas not previously drilled. Upon

completion of the underground infill drill program in Q4|22, the Company anticipates commencing a

resource upgrade for the Plomosas Mine Area.

Underground Infill Program – Discussion of Results

The drill holes PLIP22-10, PLIP22-11, PLIP22-12 and PLIP22-13 have successfully discovered

wide, high-grade Ag mineralization hosted by hydrothermal breccias (Figure 3) located in the hanging

wall of the previously mined polymetallic (Ag-Au-Pb-Zn) hydrothermal Plomosas Breccia.

This recently mapped zone is located in a section of the Plomosas Mine where the Company initially

defined prospective NE-trending faults with potential to host additional Ag-Au only mineralization.

These zones were not previously the subject of significant exploration due to the focus on base

metals in the historical plant flowsheet. Historical production, and hence exploration, targeted Pb-Zn

rich mineralization at the Plomosas Mine.

The drill holes from PLIP22-01 to PLIP22-09 (Table 1) consistently intersected high grade Ag-Au

mineralization hosted in a polymetallic (Pb-Zn) hydrothermal breccia. All nine holes indicate the

presence of multiple hydrothermal zones with Ag results generally >200 g/t Ag and individual Au

grades up to 4.5 g/t Au in locations drilled along strike on the 1025 RL level.

Figure 2: Plomosas Mine – Planned Underground Infill Drilling (CNW Group/GR Silver Mining Ltd.)

Figure 3: Core Photo Detail – High-grade Ag Mineralization Hole PLIP22-13 (CNW Group/GR Silver

Mining Ltd.)

Table 1: Plomosas Mine Area - Drill Results

Drill Hole

From

(m)

To (m)

Apparent

width

(m)

True

width

(m)

Ag g/t

g/t

Pb %

AgEq

(g/t)

PLIP22-01

PLIP22-02

0.0

10.2

7.6

0.20

2.9

0.9

172

including

7.9

9.2

1.3

1.2

221

1.27

19.6

2.4

1,038

PLIP22-03

2.1

9.5

7.4

120

0.01

0.4

0.2

144

PLIP22-04

1.8

12.4

10.6

0.03

0.2

0.5

PLIP22-05

0.3

7.1

6.8

5.2

179

0.11

2.3

0.8

299

including

1.5

2.8

1.3

400

0.03

0.2

0.7

441

PLIP22-06

3.5

4.7

1.2

1.1

767

0.17

0.4

0.5

826

PLIP22-07

PLIP22-08

3.0

11.0

8.0

6.9

1.41

4.4

3.4

520

including

5.7

7.0

1.3

1.0

205

3.95

4.6

3.5

950

PLIP22-09

0.0

11.1

0.1

including

3.1

4.7

1.6

202

0.1

0.2

218

PLIP22-10

1.8

10.1

8.3

100

0.01

0.1

including

4.9

7.9

3.0

196

0.01

0.1

PLIP22-11

0.3

3.2

2.9

190

0.1

including

0.3

0.7

0.4

626

0.02

0.2

0.4

PLIP22-12

0.0

14.0

146

including

6.8

7.2

0.4

2,474

0.2

0.3

2,542

PLIP22-13

12.8

19.3

6.5

1,458

0.2

1,485

including

13.2

14.1

0.9

3,118

0.05

0.9

0.7

3,266

"na" = no significant result. Numbers may be rounded. Results are uncut and undiluted. True sample widths are approximate due to complexity of structural orientations. Cu

results in these drill holes are not considered by the Company to be significant but have been used in the calculation of AgEq.

* AgEq calculations using US$20.00/oz Ag, US$1,600/oz Au, US$0.90/lb Pb, US$1.10/lb Zn and US$3.00/lb Cu, with metallurgical recoveries of Ag – 74%, Au – 86%, Pb – 69%,

Zn – 75% and Cu – 80%. AgEq = ((Ag grade x Ag Price x Ag recovery) + (Au grade x Au price x Au recovery) + (Pb grade x Pb price x Pb recovery) + (Zn grade x Zn price x Zn

recovery) + (Cu grade x Cu price x Cu recovery))/(Ag price x Ag recovery)

Table 2: Plomosas Mine Area - Surface Infill Drill Hole Details

Drill Hole

East (m)

North (m)

RL (m)

Dip (

)

Azimuth (

)

Depth (m)

Results Status

PLIP22-01

451459

2551919

901

-50

15.0

Received

PLIP22-02

451459

2551919

901

-90

15.0

Received

PLIP22-03

451434

2551986

900

-45

125

9.5

Received

PLIP22-04

451438

2551994

900

-45

12.4

Received

PLIP22-05

451449

2551982

900

-45

12.0

Received

PLIP22-06

451464

2551948

899

-20

245

9.0

Received

PLIP22-07

451461

2551930

903

-53

7.0

Received

PLIP22-08

451407

2551874

903

-54

130

11.0

Received

PLIP22-09

451379

2551741

908

-25

290

11.07

Received

PLIP22-10

451392

2551746

910

-48

10.1

Received

PLIP22-11

451408

2551767

909

-48

15.0

Received

PLIP22-12

451397

2551741

911

-42

16.0

Received

PLIP22-13

451381

2551728

912

-40

180

19.25

Received

Note: All holes drilled from underground, targeting unmined areas where the Company previously adopted zero values on unsampled areas in the 2021 resource estimation, as well

as areas with insufficient drilling and recently discovered new mineralization requiring additional data for geological/mineralization modelling.

Qualified Person

The scientific and technical data contained in this News Release related to the exploration program

were reviewed and/or prepared under the supervision of

Marcio Fonseca

, P. Geo. He has approved

the disclosure herein.

About GR Silver Mining Ltd

GR Silver Mining is a Canadian-based,

Mexico

-focused junior mineral exploration company engaged

in cost-effective silver-gold resource expansion on its 100%-owned assets, located on the eastern

edge of the Rosario Mining District, in the southeast of Sinaloa State,

Mexico

. GR Silver Mining

controls 100% of two past producer precious metal underground and open pit mines, within the

expanded Plomosas Project, which includes the integrated San Marcial Area and

La Trinidad

acquisition. In conjunction with a portfolio of early to advanced stage exploration targets, the

Company holds 734 km

of concessions containing several structural corridors totaling over 75 km in

strike length.

GR Silver Mining Ltd.

Eric Zaunscherb

Chairman & CEO

Cautionary Statement Regarding Forward-Looking Information

This press release contains "forward-looking statements" within the meaning of applicable

Canadian securities legislation and information that are based on the beliefs of management and

reflect the Company's current expectations. When used in this press release, the words "estimate",

"project", "belief", "anticipate", "intend", "expect", "plan", "predict", "may" or "should" and the

negative of these words or such variations thereon or comparable terminology are intended to

identify forward-looking statements and information.

Such statements and information reflect the current view of the Company. Risks and uncertainties

may cause actual results to differ materially from those contemplated in those forward-looking

statements and information. By their nature, forward-looking statements involve known and

unknown risks, uncertainties and other factors which may cause our actual results, performance or

achievements, or other future events, to be materially different from any future results,

performance or achievements expressed or implied by such forward-looking statements.

Neither the 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 press release.

SOURCE

GR Silver Mining Ltd.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/May2022/24/c1433.html

%SEDAR: 00040149E

For further information:

Brenda Dayton, VP Corporate Communications, Telephone:

+1.604.558.6248, Email: [email protected]

CO: GR Silver Mining Ltd.

CNW 06:00e 24-MAY-22

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