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GR Silver Mining Reports Wide and High- Grade Zones from New Underground Drilling in the Plomosas Mine Area: 83 m

Corporate Updates

GR Silver Mining Reports Wide and High-

Grade Zones from New Underground Drilling

in the Plomosas Mine Area:

83 m

@ 420 g/t AgEq

1

,

including

11 m

@ 1,596 g/t AgEq, and

4 m

@ 1,319 g/t AgEq

VANCOUVER, BC

,

Jan. 5, 2021

/CNW/ - GR Silver Mining Ltd

.

(TSXV: GRSL) (FRANKFURT: GPE)

(OTCQB: GRSLF)

("GR

Silver Mining" or the "Company")

– is pleased to report wide and high-

grade drill results from the Company's underground core drilling program in the Plomosas Mine

Area, as well as validation sampling results from historic drilling, at its 100%-owned Plomosas Silver

Project ("Plomosas Project") in

Sinaloa, Mexico

.

The underground drilling program is targeting bulk tonnage-style mineralization in the Plomosas Mine

Area (following the Company's recent discovery at level 775, approximately

250 m

below surface)

aiming to delineate high margin precious and base metals mineralization with potential for large

tonnage and scalability.

The successful underground exploration drilling program at the Plomosas Mine Area has discovered

extensions to the wide mineralization previously sampled at level 775, both below, and laterally to,

previously mined areas. The mineralization is represented by thick intercepts of Au-Ag-Pb-Zn-Cu

mineralization hosted in a series of hydrothermal breccias.

Drill intercept highlights from recently completed hole PLI20-04

2

include (see also Table 1):

83.0 m

@ 420 g/t AgEq (2.52 g/t Au, 33 g/t Ag, 0.9 % Pb, 2.9 % Zn and 0.3 % Cu, from

98.0 to

181.0 m

), including:

4.0 m

@ 1,319 g/t AgEq (9.35 g/t Au, 38 g/t Ag, 0.4 % Pb, 10.5 % Zn and 0.3 % Cu);

and

11.0 m

@ 1,596 g/t AgEq (9.41 g/t Au, 135 g/t Ag, 5.7 % Pb, 9.8 % Zn and 0.5 % Cu)

_________________________

1

AgEq is based on long term gold, silver, zinc, lead and copper prices of US$1600 per ounce gold, US$16.50 per ounce silver, US$0.85 per pound zinc, US$0.95 per pound

lead and US$3.00 per pound copper. The metallurgical recoveries are assumed as 90% Ag, 95% Au, 78% Pb, 70% Zn and 70% Cu.

2

As final interpretation of the 3D orientation of mineralization is incomplete, true widths are unknown at this time and are reported as drilled widths.

Two oriented underground core drill holes (PLI20-03, PLI20-04), drilled by GR Silver Mining, have

provided important geological, structural and mineralization data, thus aiding the interpretation of

these wide, high-grade zones. This data is assisting in the investigation of additional broad zones of

sulphide-rich (sphalerite, galena and chalcopyrite) mineralization hosted in structurally controlled

hydrothermal breccias in the Plomosas Mine Area (

link to core photos

).

Four historic underground drill holes (PLI17-05, PLI17-08, PLI17-15 and PLI17-16), located nearby,

were also validated with new sampling by GR Silver Mining. All data and additional new sample

results are being incorporated into a 3D geological model (Figure 1).

GR Silver Mining President and CEO,

Marcio Fonseca

, commented,

"These are extraordinary

drilling results from the Plomosas Mine Area, indicating potential for size and scalability in the

geological model to host attractive precious and base metals mineralization in areas close to

existing underground development. We will continue with underground drilling in the vicinity of this

polymetallic mineralization in 2021 and will also apply the technical knowledge to look for similar

mineralization in other targets in the Plomosas Silver Project."

The drill hole PLI20-04 represents a

25 m

step-out from the previously released high grade

discovery at the deepest level (

775m

RL) of the Plomosas Mine Area (see

News Release dated

28 September, 2020

). The step-out area displays an intersection of two fault

systems: the low angle N-S trending Plomosas Fault and high angle NE oriented faults (

see cross section 2551950N

).

The wide mineralized zone is mainly comprised of high-grade Au-Ag-Pb-Zn hydrothermal breccia,

with late disseminated chalcopyrite (Cu) - pyrite rich veins/veinlets. A pervasive chalcopyrite-pyrite

quartz stockwork system is common not only on the footwall, but also on the hanging wall of the

mineralized hydrothermal breccia. This system is apparently hosted by the two fault systems and

also by specific geological units, oxidized andesites and andesitic tuffs, defining a prospective

corridor along strike. A similar style of mineralization was recently mapped in the upper levels of the

Plomosas Mine Area and is currently the subject of detailed exploration. Based on the recent

underground drilling results, GR Silver Mining is continuing the investigation of all historical

underground sampling in order to delineate new zones for drilling, aiming to incorporate all new

areas in the upcoming NI 43-101 resource estimation.

Table 1 and 2 summarize the most significant assay results for the underground drill holes reported

in this News Release.

Table 1: Underground Drill Hole Results - News Release

January 05, 2021

(Plomosas Mine

Area)

Hole No.

Type

From (m)

To (m)

Drilled width (m)

Ag g/t

Au g/t

Pb %

Zn %

Cu %

AgEq g/t

PLI20-03

UG

No significant assays

PLI20-04

UG

98.0

181.0

83.0

33

2.52

0.9

2.9

0.3

420

includes

99.0

103.0

4.0

38

9.35

0.4

10.5

0.3

1,319

139.0

150.0

11.0

135

9.41

5.7

9.8

0.5

1,596

Table 2: Historic Underground Drill Hole Results - News Release

January 5, 2021

(Plomosas

Mine Area)

Hole No.

Type

From (m)

To (m)

Drilled width (m)

Ag g/t

Au g/t

Pb %

Zn %

Cu %

AgEq g/t

PLI17-05

UG

120.0

125.0

5.0

58

na

na

na

na

PLI17-08

UG

80.0

98.7

18.7

31

0.21

1.5

1.6

na

152

includes

91.0

95.6

4.6

88

0.73

5.8

5.3

0.1

512

PLI17-15

UG

0.0

41.1

41.1

14

0.35

1.5

2.8

na

180

PLI17-16

UG

0.0

32.1

32.1

6

0.39

1.9

1.9

na

As final interpretation of the 3D orientation of mineralization is incomplete,

true widths are unknown at this time and are reported as drilled widths. AgEq is

based on long term gold, silver, zinc and lead prices of US$1600 per ounce gold, US$16.50 per ounce silver, US$0.85 per pound zinc, US$0.95 per pound lead

and US$2.00 per pound copper. The metallurgical recoveries are assumed as 90% Ag, 95% Au, 78% Pb, 70% Zn.and 70% Cu. "na" = no relevant assays. All

numbers are rounded. Results are uncut and undiluted. UG: Underground Drill Hole, SURF: Surface Drill Hole

The following table (Table 3) summarizes the collar locations for drill holes identified in this News

Release.

Table 3: Drill Hole Locations – News Release

January 5, 2021

(Plomosas Mine Area)

Hole No.

East (m)

North (m)

RL (m)

Azimuth

Dip

Depth (m)

PLI20-03

451152

2551934

748

270

-10

165

PLI20-04

451152

2551934

748

270

-30

230

PLI17-05

451022

2551887

705

0

-45

125

PLI17-08

450917

2551891

705

56

-45

159

PLI17-15

451022

2551887

705

0

-45

124

PLI17-16

451023

2551886

705

25

-55

104

All numbers are rounded.

GR Silver Mining believes that the Plomosas Mine Area is part of a much larger low sulphidation

epithermal system as indicated by field evidence along one kilometre of strike length, where only

400 m

of that strike had previously been drilled. The 2020 underground and surface exploration

program defined multiple styles of mineralization, creating an opportunity for the Company to

continue discovering new mineralized zones close to the surface.

Qualified Person

The scientific and technical data contained in this News Release related to the Plomosas Project

was reviewed and/or prepared under the supervision of Marcio Fonseca, P.Geo. He has approved

the disclosure herein.

Quality Assurance Program and Quality Control Procedures ("QA/QC")

The Company has implemented QA/QC procedures which include insertion of blank and standard

samples in all sample lots sent to SGS de México, S.A. de C.V laboratory facilities in

Durango,

Mexico

, for sample preparation and assaying. For every sample with results above Ag >100 ppm

(over limits), these samples are submitted directly by SGS de

Mexico

to SGS Canada Inc at

Burnaby, BC

. The analytical methods are 4-acid Digest and Inductively Coupled Plasma Optical

Emission Spectrometry with Lead Fusion Fire Assay with gravimetric finish for silver above over

limits. For gold assays the analytical methods are Lead Fusion and Atomic Absorption Spectrometry

Lead Fusion Fire Assay and gravimetric finish for gold above over limits.

The recent drill holes, completed by First Majestic from 2016 to 2018, followed QA/QC protocols

reviewed and

validated by GR Silver Mining, including insertion of blank and standard samples in all sample lots

sent to First Majestic's Laboratorio Central facilities in La Parilla, Durango, for sample preparation

and assaying. Additional validation and check assays were performed by an independent laboratory

at SGS de México, S.A. de C.V. facilities in Durango, Mexico. The analytical methods applied for

these recent holes for Ag and Au assays comprised of Fire Assay with Atomic Absorption finish

for samples above Au >10ppm and Ag >300ppm and Gravimetric Finish. Pb and Zn were analyzed

using Inductively Coupled Plasma Optical Emission Spectrometry. GR Silver Mining has not received

information related to the Grupo Mexico QA/QC and assay protocols and at this stage is considering

the information historic for news release purposes.

About GR Silver Mining Ltd

.

GR Silver Mining Ltd. is a

Mexico

-focused company engaged in cost-effective silver-gold resource

expansion on its key assets which lie on the eastern edge of the Rosario Mining District,

Sinaloa,

Mexico

.

PLOMOSAS SILVER PROJECT

GR Silver Mining owns 100% of the Plomosas Silver Project located near the historic mining village

of

La Rastra

, within the Rosario Mining District. The Project is a past-producing asset where only

one mine, the Plomosas silver-gold-lead-zinc underground mine, operated a 600 tpd crush milling

flotation circuit from 1986 to 2001, producing approximately 8 million ounces of silver, 73 million

pounds of lead and 28 million pounds of zinc.

The Project has an 8,515-hectare property position and is strategically located within 5 km of the

Company's San Marcial Silver Project in the southeast of Sinaloa State,

Mexico

.

The

March 2020

acquisition of the Plomosas Silver Project included 563 historical and recent drill

holes from both surface and underground locations. These drill holes represent an extensive

database allowing the Company to advance towards resource estimation and potential project

development in the near future.

The Company has commenced an

11,900 m

drilling program with surface holes focused on

expanding known mineralization along strike in two initial areas, the Plomosas Mine Area and the

San Juan Area

. Underground drilling included in the program will target the extension of recent

polymetallic discoveries at the lowest level (

775 m

RL, or ~250 m below surface) of the Plomosas

Mine Area and six low sulphidation epithermal veins at

San Juan Area

. Both areas will be the subject

of NI 43-101 resource estimations following completion of this drill program.

The 100%-owned assets include all facilities and infrastructure including: access roads, surface

rights agreement, water use permit,

8,000 m

of underground workings, water access, 60 km - 33

KV power line, offices, shops, 120-person camp, infirmary, warehouses and assay lab representing

approximately

US$30 million

of previous capital investments. The previous owners invested

approximately

US$18 million

in exploration, including extensive geophysics and geochemistry

programs.

The silver and gold mineralization on this Project display the alteration, textures, mineralogy and

deposit geometry characteristics of a low sulphidation epithermal silver-gold-base metal vein/breccia

mineralized system. Previous exploration was focused on Pb-Zn-Ag-Au polymetallic shallow

mineralization, hosted in NW-SE structures in the vicinity of the Plomosas mine. The E-W portion of

the mineralization and extensions for the main N-S Plomosas fault remain under-explored.

In addition to the resource potential at Plomosas, a review of the existing drill hole database,

geophysical surveys and geochemical data covering most of the concession, has defined 16 new

exploration targets from which 11 have high priority for future exploration programs.

SAN MARCIAL PROJECT

San Marcial is a near-surface, high-grade silver-lead-zinc open pit-amenable project, which contains

a 36 Moz AgEq (Indicated) and 11 Moz AgEq (Inferred) NI 43-101 resource estimate. The company

recently completed over

320 m

of underground development in the San Marcial Resource Area, from

which underground drilling is planned to expand the high-grade portions of the resource down dip.

The Company recently discovered additional mineralization in the footwall, outside of the existing

resource, and will also be drilling this area. GR Silver Mining is the first company to conduct

exploration at San Marcial in over 10 years. The NI 43-101 resource estimate (San Marcial Project –

Resource Estimation and Technical Report) was completed by WSP Canada Inc. on

March 18,

2019

and amended on

June 10, 2020

.

Recent exploration has identified silver and gold mineralization in areas previously defined as non-

mineralized, discovering evidence of pervasively altered rocks with intense silicification, veining and

associated wide, silver and gold mineralized zones on the footwall of the NI 43-101 resource.

Plomosas and San Marcial collectively represent a geological setting resembling the multimillion-

ounce San Dimas Mining District which has historically produced more than 600 Moz silver and 11

Moz gold over a period of more than 100 years.

OTHER PROJECTS

GR Silver Mining's other projects are situated in areas attractive for future discoveries and

development in the same vicinity of Plomosas and San Marcial in the Rosario Mining District.

Mr.

Marcio Fonseca

P. Geo, President & CEO

GR Silver Mining Ltd.

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

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

this press release.

Disclaimer for Forward-Looking Information

This press release contains forward-looking statements 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.

Figure 1: Location Map - 3D Image of the Plomosas Mine Area Underground Drilling Location (CNW

Group/GR Silver Mining Ltd.)

SOURCE

GR Silver Mining Ltd.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/January2021/05/c7277.html

%SEDAR: 00040149E

For further information:

For Further Information: Contact: +1 (604) 202 3155, Email:

[email protected]

CO: GR Silver Mining Ltd.

CNW 07:30e 05-JAN-21