Blackrock Silver Announces Final Assays from Eastern Expansion Drill Program at Tonopah West The Eastern Expansion Drill Program Identified Several Mineralized Northwest Structures Hosting Shallow Mineralization Encountered Within a 1.2 Kilometre Trend
Blackrock Silver Announces Final Assays
from Eastern Expansion Drill Program at
Tonopah West
The Eastern Expansion Drill Program Identified Several
Mineralized Northwest Structures Hosting Shallow
Mineralization Encountered Within a 1.2 Kilometre Trend
EASTERN EXPANSION PROGRAM HIGHLIGHTS:
At least three mineralized northwest oriented structures have been identified within the 1.2
kilometre eastern expansion trend running parallel to the Pittsburg-Monarch fault that suggest a
series of footwall fault splays as opposed to a singular east-west structure;
TXC25-173 cut 0.92 metres of 2,122.7 grams per tonne (g/t) silver equivalent (AgEq) (1,162 g/t
silver (Ag) & 8.79 g/t gold (Au)) from 220.9 metres, and a separate zone of 1.04 metres grading
534.8 g/t AgEq (189.8 g/t Ag & 3.16 g/t Au) from 215.5 metres;
TXC25-178 drilled 6.4 metres of 296.6 g/t AgEq (135.7 g/t Ag & 1.47 g/t Au), including 0.46
metres of 3,853 g/t AgEq (1,771 g/t Ag & 19.06 g/t Au) from 183.8 metres in a north-south oriented
structure within the M&I Conversion Area at DPB South; and
Results from the Company's drill program targeting expansion potential across a one kilometre
trend of vein corridor between the DPB and Northwest Step Out resource areas (the "
Northwest
Expansion Program
") and the Eastern Expansion Program will be incorporated into an updated
mineral resource estimate and preliminary economic assessment on Tonopah West estimated to
be completed in February 2026.
Vancouver, British Columbia--(Newsfile Corp. - December 2, 2025) -
Blackrock Silver Corp. (TSXV:
BRC) (OTCQX: BKRRF) (FSE: AHZ0)
("
Blackrock
" or the "
Company
") announces the final results
from its fully-funded eastern expansion drill program (the "
Eastern Expansion Program
" or the
"
Program
") at its 100% owned Tonopah West project located in Nye and Esmeralda Counties, Nevada,
United States ("
Tonopah West
").
The Eastern Expansion Program was a follow up to the Company's successful Scout drilling program
completed at Tonopah West in February 2025 (see March 31, 2025 news) which shows additional
upside for the shallow southern portion of the Denver-Paymaster and Bermuda-Merten vein groups
("
DPB South
") resource area (the "
M&I Conversion Area
")
to expand the resource area 1,200 metres
in an easterly direction (the "
Eastern Expansion Zone
").
The Company commenced the Eastern Expansion Program in July 2025 within the Eastern Expansion
Zone, utilizing reverse circulation (RC) drilling with RC pre-collars to establish initial holes, which were
then deepened using diamond core drilling (core tails) for more detailed geological analysis. The
Program drilled a total of 6,798 metres (22,896 feet) in twenty-four drillholes, however, only 22 drillholes
were completed, as two pre-collar holes were not usable for core tails. Of the 22 completed drillholes,
three were core holes completed from surface.
Andrew Pollard, Blackrock's President and CEO, stated, "Whereas we set out to target a single east-
west mineralized structure, drilling from our Eastern Expansion Program has defined at least three
distinct, parallel mineralized zones oriented northwest. These structures appear to be splays off the
Pittsburgh-Monarch fault system. Each of these zones has intersected shallow, high-grade, and thick
mineralization, indicating significant potential for further expansion in the area. Additionally, drilling in the
M&I Conversion Area at DPB South has successfully connected previously isolated intercepts,
confirming the presence of north-south trending structures and suggesting additional tonnage potential.
Work on our upcoming mineral resource estimate and preliminary economic assessment is now
underway and on track for a targeted completion date in February 2026. These will incorporate data
from both our Northwest and Eastern Expansion drill programs."
Table 1 summarizes the final results of the Eastern Expansion Program using a cut-off grade of 150 g/t
AgEq.
Table 1: Eastern Expansion Drill Program Significant Results Using a 150 g/t AgEq Cut-off Grade
Drillhole
ID
Program
Area
Hole
Type
From (m)
To (m)
Drillhole
Interval
(m)
Ag g/t
Au g/t
AgEq g/t
TXC25-168
E Expansion
DPB South
RC/Core
298.03
299.86
1.83
73.7
0.754
156.1
Including
298.03
298.34
0.31
353.0
3.680
754.8
TXC25-171
M&I Conversion
DPB South
RC/Core
185.99
186.69
0.70
122.0
1.100
242.1
TXC25-171
M&I Conversion
DPB South
RC/Core
247.19
249.33
2.13
85.7
0.855
179.1
TXC25-173
E Expansion
DPB South
RC/Core
215.53
216.56
1.04
189.8
3.159
534.8
TXC25-173
E Expansion
DPB South
RC/Core
220.98
221.90
0.92
1,162.0
8.798
2,122.7
TXC25-178
M&I Conversion
DPB South
RC/Core
161.54
162.61
1.07
158.5
2.126
390.6
TXC25-178
M&I Conversion
DPB South
RC/Core
183.80
190.20
6.40
135.7
1.474
296.6
Including
188.37
188.82
0.46
1,771.0
19.067
3,853.0
TXC25-178
M&I Conversion
DPB South
RC/Core
270.36
271.43
1.07
108.9
1.439
266.0
Including
271.12
271.43
0.31
375.0
4.750
893.7
AgEq = Ag + Au/(Factor); where Factor = (Ag Price/Au Price)*(Ag Recovery/Au Recovery) or Factor=($27/$2,700)*(87%/95%)=0.009157; True thickness
is 75% to 85% of drill interval; NSV=No values above cut off; Cut-off grade is 150 gpt AgEq; RC/Core = RC pre-collar with core tail; Core is core from
the surface.
The Eastern Expansion Program encountered at least three northwest oriented structures which appear
to be mineralized and offset the southern caldera margin to the northeast.
The structures are parallel to
the Pittsburg-Monarch fault and suggest a series of footwall fault splays associated with the main
Pittsburg-Monarch fault.
Figure 1 below shows the approximate location and orientation of the northwest
fault system.
Drilling to date shows shallow, high-grade, and thick zones of mineralization in each of these structures
and suggest increased expansion potential along this northwest structural corridor.
Historically, the
Pittsburg-Monarch fault was considered an ore control within the district with the thickest historically
mined veins at Victor and Ohio abutting the main fault.
The Company's drilling in the Eastern Expansion
Zone has returned thick vein intervals of gold and silver along the parallel structures confirming the
importance of the Pittsburg-Monarch and its footwall fault splays.
Two drillholes, TXC25-171 and TXC25-178, were drilled in the M&I Conversion Area.
These drillholes
were directed to the west to understand several north-south structures encountered in the previous
drilling.
The Program was successful in capturing high-grade drill intervals from the north-south structures
and shows there are multiple mineralized structures with similar orientation in the area.
Figure 1: Leapfrog model showing northwest oriented structures in the Eastern Expansion area
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/676/276546_9dcdee45e417e956_001full.jpg
Although below the cut-off grade of 150 g/t AgEq, drillholes TXC25-167, -168, -175, -176, -177 and
TXC25-179 were mineralized with silver equivalent values ranging between 31 and 133 g/t AgEq.
Table
2 shows the range of gold and silver values encountered along the northwest oriented structures.
Table 2: Mineralized Drillholes from the Eastern Expansion program that are below the 150 g/t AgEq
cut-off
Drillhole
ID
Program
Area
Hole
Type
From (m)
To (m)
Drillhole
Interval
(m)
Ag g/t
Au g/t
AgEq g/t
TXC25-167
E Expansion
Ohio
RC/Core
368.96
372.01
3.05
133.0
0.002
133.2
TXC25-169
E Expansion
DPB South
RC/Core
196.90
199.95
3.05
1.2
0.480
53.6
TXC25-175
E Expansion
Ohio
RC/Core
277.98
279.69
1.71
14.2
0.155
31.2
TXC25-176
E Expansion
Ohio
Core
192.51
194.46
1.95
13.9
0.173
32.8
TXC25-177
E Expansion
Ohio
Core
177.09
178.31
1.22
2.5
0.467
53.5
TXC25-179
E Expansion
Ohio
Core
235.55
236.46
0.91
23.3
0.270
52.8
TXC25-179
E Expansion
Ohio
Core
262.28
263.35
1.07
16.9
0.167
35.1
AgEq = Ag + Au/(Factor); where Factor = (Ag Price/Au Price)*(Ag Recovery/Au Recovery) or Factor=($27/$27,00)*(87%/95%)=0.009157; True thickness
is 75% to 85% of drill interval; NSV=No values above cut off; Cut-off grade is 150 gpt AgEq; RC/Core = RC pre-collar with core tail; Core is core from
the surface.
Figure 2: Drillhole location map for the Eastern Expansion drillholes reported in this news release
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/676/276546_9dcdee45e417e956_002full.jpg
Below are all the drillhole intervals above the 150 g/t AgEq cut off from the program showing the upside
potential of the Eastern Expansion Zone.
Table 3: Eastern Expansion Program Significant Results Using a 150 g/t AgEq Cut-off Grade
(TXC25-156 to TXC25-166 released on October 27, 2025)
Drillhole
ID
Program
Area
Hole
Type
From (m)
To (m)
Drillhole
Interval
(m)
Ag g/t
Au g/t
AgEq g/t
TXC25-158
E Expansion
DPB South
RC/Core
146.30
147.83
1.52
123.0
0.852
216.0
TXC25-158
E Expansion
DPB South
RC/Core
272.83
273.86
1.04
17.9
2.353
274.8
Including
273.56
273.86
0.30
59.8
7.970
930.1
TXC25-158
E Expansion
DPB South
RC/Core
340.31
341.13
0.82
56.9
0.671
130.2
TXC25-159
E Expansion
DPB South
RC/Core
234.18
242.93
8.75
90.3
0.943
193.3
Including
241.65
242.47
0.82
567.7
5.953
1,217.8
TXC25-160
E Expansion
DPB South
RC/Core
146.30
147.83
1.52
79.4
6.660
806.6
TXC25-164
E Expansion
DPB South
RC/Core
180.44
186.11
5.67
3.6
2.379
263.4
Including
185.01
186.11
1.10
9.2
8.670
955.9
TXC25-166
E Expansion
Ohio
RC/Core
160.17
160.78
0.61
114.9
1.658
296.0
TXC25-166
E Expansion
Ohio
RC/Core
165.20
170.23
5.03
306.8
4.062
750.3
Including
166.73
168.56
1.83
724.1
8.577
1,660.6
TXC25-168
E Expansion
DPB South
RC/Core
298.03
299.86
1.83
73.7
0.754
156.1
Including
298.03
298.34
0.31
353.0
3.680
754.8
TXC25-171
M&I Conversion
DPB South
RC/Core
185.99
186.69
0.70
122.0
1.100
242.1
TXC25-171
E Expansion
DPB South
RC/Core
247.19
249.33
2.13
85.7
0.855
179.1
TXC25-173
E Expansion
DPB South
RC/Core
215.53
216.56
1.04
189.8
3.159
534.8
TXC25-173
E Expansion
DPB South
RC/Core
220.98
221.90
0.92
1,162.0
8.798
2,122.7
TXC25-178
M&I Conversion
DPB South
RC/Core
161.54
162.61
1.07
158.5
2.126
390.6
TXC25-178
M&I Conversion
DPB South
RC/Core
183.80
190.20
6.40
135.7
1.474
296.6
Including
188.37
188.82
0.46
1,771.0
19.067
3,853.0
TXC25-178
M&I Conversion
DPB South
RC/Core
270.36
271.43
1.07
108.9
1.439
266.0
Including
271.12
271.43
0.31
375.0
4.750
893.7
AgEq = Ag + Au/(Factor); where Factor = (Ag Price/Au Price)*(Ag Recovery/Au Recovery) or Factor=($27/$2,700)*(87%/95%)=0.009157; True thickness
is 75% to 85% of drill interval; NSV=No values above cut off; Cut-off grade is 150 gpt AgEq; RC/Core = RC pre-collar with core tail; Core is core from
the surface.
Drillhole
ID
Program
Area
Hole
Type
From (m)
To (m)
Drillhole
Interval
(m)
Ag g/t
Au g/t
AgEq g/t
Figure 3: Tonopah West expansion potential
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/676/276546_9dcdee45e417e956_003full.jpg
Figure 4: Tonopah West Drillhole Location Coordinates (based on GPS readings in the field, Datum
UTM, NAD 1927, Zone 11)
Drillhole ID
Area
Program
Type
UTM_NAD27
E
UTM_NAD27
N
Elevation
(m)
Depth
(ft)
Depth
(m)
Azimuth
Dip
TXC25-167
Ohio
E Expansion
RC/Core
478778.0
4213176.0
1824.5
1302.0
396.8
25
-60
TXC25-168
DPB South
E Expansion
RC/Core
478600.0
4213250.0
1800.0
1072.0
326.7
180
-65
TXC25-169
DPB South
E Expansion
RC/Core
478460.0
4213340.0
1800.0
939.0
286.2
180
-65
TXC25-170
Ohio
E Expansion
RC/Core
478910.0
4213200.0
1835.0
894.0
272.5
230
-70
TXC25-171
DPB South
M&I Conversion
RC/Core
478105.0
4213222.0
1789.0
1315.0
400.8
270
-50
TXC25-172
Ohio
E Expansion
RC/Core
478778.0
4213176.0
1824.5
898.5
273.9
225
-65
TXC25-173
DPB South
E Expansion
RC/Core
478540.0
4213310.0
1800.0
903.0
275.2
180
-75
TXC25-174
Ohio
E Expansion
RC/Core
479014.0
4213300.0
1822.0
921.0
280.7
40
-70
TXC25-175
Ohio
E Expansion
RC/Core
479046.0
4213457.0
1820.0
1232.0
375.5
40
-50
TXC25-176
Ohio
E Expansion
Core
478540.0
4213310.0
1800.0
1060.0
323.1
210
-75
TXC25-177
Ohio
E Expansion
Core
478495.0
4213405.0
1791.0
732.0
223.1
0
-90
TXC25-178
DPB South
M&I Conversion
RC/Core
478113.0
4213139.0
1791.0
1728.5
526.8
270
-50
TXC25-179
Ohio
E Expansion
Core
478460.0
4213340.0
1800.0
922.0
281.0
0
-90
Drillhole ID
Area
Program
Type
UTM_NAD27
E
UTM_NAD27
N
Elevation
(m)
Depth
(ft)
Depth
(m)
Azimuth
Dip
Quality Assurance/ Quality Control
All sampling is conducted under the supervision of the Company's project geologists, and a strict chain
of custody from the project to the sample preparation facility is implemented and monitored. The RC
samples are hauled from the project site to a secure and fenced facility in Tonopah, Nevada, where they
are loaded on to American Assay Laboratory's (AAL) flat-bed truck and delivered to AAL's facility in
Sparks, Nevada.
A sample submittal sheet is delivered to AAL personnel who organize and process the
sample intervals pursuant to the Company's instructions.
The RC samples are lined out at the lab and logged into AAL's system.
The samples are dried, crushed
to 85% passing 10 mesh (2mm) and a 250-gram sub-sample split is collected and pulverized to 200
mesh (74 micron) in a ring and puck pulverizer.
Then the pulverized material is digested and analyzed for
gold using fire assay fusion and an Induced Coupled Plasma (ICP) finish on a 30-gram assay split (FA-
PB30-ICP). Silver is determined using five-acid digestion and ICP analysis (ICP-5AM48).
Over limits for
gold and silver are determined using a gravimetric finish (GRAVAU30 and GRAVAG30).
Data
verification of the assay and analytical results are completed to ensure accurate and verifiable results.
Blackrock personnel insert a blind prep blank, lab blank or a certified reference material approximately
every 15th to 20th sample.
Qualified Persons
Blackrock's exploration activities at Tonopah West are conducted and supervised by Mr. William
Howald, Executive Chairman of Blackrock. Mr. William Howald, AIPG Certified Professional Geologist
#11041, is a Qualified Person as defined under National Instrument 43-101 –
Standards of Disclosure
for Mineral Projects
. He has reviewed and approved the contents of this news release.
About Blackrock Silver Corp.
Backed by gold and silver ounces in the ground, Blackrock is a junior precious metal focused exploration
and development company driven to add shareholder value. Anchored by a seasoned Board of
Directors, the Company is focused on its 100% controlled Nevada portfolio of properties consisting of
low-sulphidation, epithermal gold and silver mineralization located along the established Northern
Nevada Rift in north-central Nevada and the Walker Lane trend in western Nevada.
Additional information on Blackrock Silver Corp. can be found on its website at
www.blackrocksilver.com
and by reviewing its profile on SEDAR at
www.sedarplus.ca
.
Cautionary Note Regarding Forward-Looking Statements and Information
This news release contains "forward-looking statements" and "forward-looking information" (collectively,
"
forward-looking statements
") within the meaning of Canadian and United States securities
legislation, including the United States Private Securities Litigation Reform Act of 1995. All statements,
other than statements of historical fact, are forward-looking statements. Forward-looking statements in
this news release relate to, among other things: the Company's strategic plans; the anticipated
objectives and results from the Company's drill programs at Tonopah West; the timing of completion of
an updated mineral resource estimate and preliminary economic assessment on Tonopah West; the
Company's de-risking initiatives at Tonopah West; estimates of mineral resource quantities and
qualities; estimates of mineralization from drilling; geological information projected from sampling
results; and the potential quantities and grades of the target zones.
These forward-looking statements reflect the Company's current views with respect to future events and
are necessarily based upon a number of assumptions that, while considered reasonable by the
Company, are inherently subject to significant operational, business, economic and regulatory
uncertainties and contingencies. These assumptions include, among other things: conditions in general
economic and financial markets; accuracy of assay results; geological interpretations from drilling
results, timing and amount of capital expenditures; performance of available laboratory and other related
services; future operating costs; the historical basis for current estimates of potential quantities and
grades of target zones; the availability of skilled labour and no labour related disruptions at any of the
Company's operations; no unplanned delays or interruptions in scheduled activities; all necessary
permits, licenses and regulatory approvals for operations are received in a timely manner; the ability to
secure and maintain title and ownership to properties and the surface rights necessary for operations;
and the Company's ability to comply with environmental, health and safety laws. The foregoing list of
assumptions is not exhaustive.
The Company cautions the reader that forward-looking statements involve known and unknown risks,
uncertainties and other factors that may cause actual results and developments to differ materially from
those expressed or implied by such forward-looking statements contained in this news release and the
Company has made assumptions and estimates based on or related to many of these factors. Such
factors include, without limitation: the timing and content of work programs; results of exploration
activities and development of mineral properties; the interpretation and uncertainties of drilling results
and other geological data; receipt, maintenance and security of permits and mineral property titles;
environmental and other regulatory risks; project costs overruns or unanticipated costs and expenses;
availability of funds; failure to delineate potential quantities and grades of the target zones based on
historical data; general market and industry conditions; and those factors identified under the caption
"Risks Factors" in the Company's most recent Annual Information Form.
Forward-looking statements are based on the expectations and opinions of the Company's
management on the date the statements are made. The assumptions used in the preparation of such
statements, although considered reasonable at the time of preparation, may prove to be imprecise and,
as such, readers are cautioned not to place undue reliance on these forward-looking statements, which
speak only as of the date the statements were made. The Company undertakes no obligation to update
or revise any forward-looking statements included in this news release if these beliefs, estimates and
opinions or other circumstances should change, except as otherwise required by applicable law.
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 release.
For Further Information, Contact:
Andrew Pollard
President and Chief Executive Officer
(604) 817-6044
To view the source version of this press release, please visit
https://www.newsfilecorp.com/release/276546