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GR Silver Mining Announces Filing of Technical Report for the Plomosas Project in Sinaloa, Mexico

Technical Reports (NI 43-101)

GR Silver Mining Announces Filing of

Technical Report for the Plomosas Project in

Sinaloa, Mexico

VANCOUVER, BC

,

Oct. 8, 2021

/CNW/ -

GR Silver Mining Ltd. ("GR Silver Mining"

or the

"Company")

(TSXV: GRSL) (OTCQB: GRSLF) (FRANKFURT: GPE) – announces that a Technical

Report titled "Technical Report for the Plomosas Project,

Sinaloa, Mexico

" has been filed on SEDAR

(

www.sedar.com

). The report was prepared in accordance with National Instrument 43-101 -

Standards of Disclosure for Mineral Projects

of the Canadian Securities Administrators ("NI 43-

101").

Highlights

Indicated Resources: 10.3 Moz AgEq - 3.4

Moz Ag

, 53 koz Au, 73 Mlbs Zn, and 48 Mlbs Pb.

Inferred Resources: 21.0 Moz AgEq - 8.6

Moz Ag

, 85 koz Au, 149 Mlbs Zn, and 116 Mlbs Pb.

The incorporation of extensive historical data and completion of the initial resource estimates at

the Plomosas Project ("Plomosas") incremental to the nearby San Marcial NI 43-101 mineral

resource estimate of 36.0 Moz AgEq # Indicated resources and 11.9 Moz AgEq # Inferred

resources (see News Release dated

June 12, 2020

), represents a major milestone for GR

Silver.

Mining Estimates include 80 new drill holes and 476 historic drill holes representing a total of

100,672 m

of drilling covering two areas, the former Plomosas Mine and the

San Juan

area.

The present resource included a sampling of historical drill holes completed by previous

companies that was frequently selective, resulting in a large amount of drill core unsampled; this

core is no longer available. Unsampled intervals within mineralized zones were assigned zero

values for the resource estimation, including in areas with evidence of precious and base metals

mineralization. Further drilling will address these blank spots to potentially continue resource

growth at the Plomosas Mine and

San Juan

areas.

A

14,000m

drill program employing seven rigs is in progress on newly identified, high priority

Au–Ag targets outside the current resource areas.

Independent Qualified Persons

The independent Technical Report was prepared by Dr.

Gilles Arseneau

, PhD, P. Geo., of Arseneau

Consulting Services Inc. ("ACS") and

Shane Tad Cowie

, P.Eng. Messrs. Arseneau and

Tad Cowie

are Qualified Persons as defined under NI 43-101. The report is filed on SEDAR and is available

on GR Silver Mining's website,

here

.

Quality Assurance Quality Control:

The scientific and technical information in this press release has been reviewed and approved by Dr.

Gilles Arseneau

, PhD, P. Geo. and

Shane Tad Cowie

, P. Eng., both of whom are Qualified Persons

as defined in NI 43-101.

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 778 km

2

of concessions containing several structural corridors totaling over 75

kilometres in strike length.

GR Silver Mining Ltd.

Mr.

Marcio Fonseca

, P. Geo.

President & CEO

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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/October2021/08/c3379.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 15:58e 08-OCT-21