Rokmaster Develops Sediment Hosted Copper-Silver Targets at Big Copper
Rokmaster Develops Sediment Hosted
Copper-Silver Targets at Big Copper
VANCOUVER, BC
,
Nov. 24, 2021
/CNW/ - Rokmaster Resources Corp. (TSXV: RKR) (OTCQB:
RKMSF) (FSE: 1RR1) ("Rokmaster" or the "Company") is pleased to present results of the
preliminary prospecting program at the road accessible Big Copper Property located in southeastern
British Columbia
. Rokmaster's prospecting program was a response to the resurgence in copper-
silver prices and significant increase in exploration exclusively directed towards discovery of large
sedimentary hosted copper-silver deposits (the second most important global source of Cu, lagging
only to porphyry Cu deposits in total resource) in southeastern
British Columbia
, northern
Montana
and
Idaho
.
John Mirko
, President and CEO of Rokmaster stated:
"For many years, Big Copper had been a secondary asset within Rokmaster's project portfolio. Our
re-examination of the Big Copper Property has been predicated by:
1
.
Rapid and substantial increases in copper and silver prices and projected supply short falls for
these metals, and
2
.
Greatly enhanced competitor activity in the search for sediment hosted copper deposits in
southeastern
British Columbia
.
Big Copper has always been a significant sediment hosted copper-silver occurrence and the results
of our prospecting surveys further support this conclusion. Exploration at Big Copper will be low cost
and may offer high returns. Rokmaster looks forward to developing and implementing an exploration
strategy to cost effectively advance Big Copper over the coming months."
Big Copper Property:
The Big Copper Property tracks a mineralized deformation and alteration
front for approximately 4.5 km defined by at least three adits, outcrops, seven trenches and several
drillholes which support strong copper-silver mineralization (
Figure 1
). Mineralized zones are hosted
within the 1,300 –
2,300 m
thick
Creston
formation which is composed of fine-grained siltstones,
argillites and dirty quartzites. Mineralization is best developed within a strong, 50 –
60 m
wide
deformation zone, forming along the western limb of a regional scale antiform. Mineralization is
proximal from the transition from bright green, chlorite rich sediments to thin bedded yellow-cream
quartz rich sediments. This color change may represent the change from reduced to oxidized fluids,
a common signature of mineralization at sediment hosted copper deposits. At Big Copper, quartzite
rock units may become increasingly calcareous representing a transitional contact with the overlying
Kitchener Formation. The
Creston
formation is correlative with the Revett Formation which hosts
several large copper-silver deposits and undeveloped occurrences in northern
Montana
and
Idaho
,
including the Spar Lake, Montanore and
Rock Creek
deposits (
Figure 2
). Like the large sediment
hosted copper deposits in the Revett formation, the Big Copper Property is unusual in that it hosts
both copper and silver at significant levels.
Figure 1: Geology and Sample Location Map
Geology and Sample Location Map (Figure 1) (CNW Group/Rokmaster Resources Corp.)
Figure 2.
Creston
– Revett Stratigraphic Column
Creston – Revett Stratigraphic Column (Figure 2) (CNW Group/Rokmaster Resources Corp.)
Mineralization at the Big Copper Property has two dominant styles including:
1
.
Disseminated chalcopyrite-pyrite grains forming parallel to the dominant foliation and locally
forming discrete sulphide bands.
2
.
Clotted chalcopyrite grains hosted within bedding parallel, deformed quartz-siderite veins.
Copper-silver grades and widths in historical trenches and drillholes included
1
:
Trench 1:
5.5 m
of 0.83% Cu and 23.3 g/t Ag.
Trench 3:
1.1 m
of 1.20% Cu and 16.5 g/t Ag.
Trench 7:
2.0 m
of 2.95 % Cu and 35.7 g/t Ag.
In 1965, Cominco collared 5 diamond drill holes at an elevation of approximately
1,830 m
on the
north side of the Saint Mary's River
1
. Four out of the five drillholes cored significant copper
mineralization; significantly silver was not assayed for.
DDH 1A:
4.4 m
of 3.30% Cu (within
29.7 m
of 1.40% Cu).
DDH 3:
4.1 m
of 1.20% Cu.
DDH 4:
3.0 m
of 0.20% Cu.
DDH 5.
1.5 m
of 1.60 Cu.
In 1967, four percussion drillholes targeted the Big Copper mineralized zone at an elevation of
1,370
m
, also on the north side of the Saint Mary's River, cut:
Drillhole S1:
12.2 m
of 0.92% Cu and 6.2 g/t Ag.
Drillhole S2:
9.1 m
of 0.57% Cu and 3.4 g/t Ag.
Drillhole S3:
9.1 m
of 0.19% Cu and trace Ag.
Drillhole S4:
9.1 m
of 0.85% Cu and 12.0 g/t Ag.
Footnote (1). The condition of trenches and drillholes did not permit Rokmaster personnel to
resample these historical mineralized intervals and the historical data is not 43-101 compliant. In
addition, the reported widths of mineralization in trenches is likely to be representative of true
widths but insufficient data exists to permit the calculation of true widths of the reported
mineralized intervals in drillholes. The trench results, 1965 and 1967 drillholes, and their results,
are cited in: Holcapek, F. 1976: Geological and Geophysical Report on the Bracebridge Property,
Fort Steele Mining Division. BC Assessment Report No. 6206, 27 pages.
Rokmaster's prospecting team examined historical trenches, rock outcrops and waste dumps along
the strike of the mineralized zone at Big Copper, Table 1. All samples were collected north of the
Saint Mary's River over a strike length of approximately
1,000 m
. The zone is also known to continue
to the south of the Saint Mary's River, e.g. the 4600 Creek Showing, adding at least
2,500 m
to the
strike length of the known mineralized zone.
Over this broad area, seven rock and chip samples averaged 0.16 g/t Au, 77 g/t Ag and 3.43% Cu
(Table 1.) Lead and zinc values within these samples are negligible. The copper-silver ratios are
strong and within the range of historical averages. Significantly, the gold content ranges from 0.02 to
0.35 g/t Au and averages 0.17 g/t Au.
Table 1. Prospecting Sample Results - Big Copper.
Sample
Easting
Northing
Sample Type
Au g/t
Ag g/t
Cu %
Pb %
Zn %
P304022
534874
5513494
grab-rock
0.35
147
12.559
0.01
0.08
P304019
534566
5512633
1.3 m chip
0.19
128
2.927
0.005
0.05
P304017
534837
5513508
grab-rock
0.26
121
2.867
0.005
0.05
P310220
534886
5513536
grab-rock
0.13
72
2.659
0.02
0.04
P304020
534548
5512530
grab-rock
0.08
31
1.81
0.005
0.01
P304018
534837
5513508
1.1 m chip
0.14
34
0.876
0.005
0.02
P304021
534848
5513556
grab-rock
0.02
7
0.317
0.005
0.01
The prospecting samples characterize the higher-grade mineralization. These results are within the
range of those reported by previous operators, confirming that Big Copper is a robust copper-silver
sediment hosted occurrence, and one which may have a significant structural overprint.
Quality Assurance/Quality Control.
All prospecting rock samples were shipped to MSA Labs in
Langley, British Columbia
. MSA Labs is an ISO 17025 (Testing and Calibration Laboratory) and an
ISO 9001 (Quality Management System) Certified Laboratory. Rock samples were crushed to 2 mm
and a 500-gram sub sample was pulverized with 85% of the sample passing 75 microns. The sub
sample was analysed using a combination of MSA Labs FAS211 for Au and ICP–240 (4 acid
digestion) for silver, base metals and other trace elements. FAS211 for gold is an ore grade fire
assay of a 50 g pulp with an AAS finish with a detection range between 0.01 and 100 ppm). ICP-
240 utilizes four acid digestion and provides ore grade analytical data on silver, base metals and 26
other elements. In addition to internal MSA lab standards, Rokmaster submitted known standards
into the sample stream.
The technical information in this news release has been prepared in accordance with Canadian
regulatory requirements and reviewed and approved by Mr.
Eric Titley
, P. Geo., a Qualified Person
as per National Instrument 43-101, who is independent of Rokmaster.
For shareholder information please contact: Mike Kordysz,
, Ph. +1 (604)
319-3171
On Behalf of the Board of Directors of
Rokmaster Resources Corp.
John Mirko
President & Chief Executive Officer.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term in defined in the
policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this
press release.
About Rokmaster
Rokmaster controls a portfolio of three significant exploration and development projects all of which
are located in southern
British Columbia
in regions of excellent infrastructure. The three projects
include:
1
.
Revel Ridge.
Rokmaster is currently conducting an underground drill program at the Revel
Ridge project located in southeastern
British Columbia
35 km's north of the
City of Revelstoke
.
Revel Ridge hosts a high-grade gold and polymetallic orogenic sulphide deposit which has been
the subject of a PEA Technical Report dated
December 8, 2020
.
2
.
Big Copper.
Rokmaster controls the Big Copper property in the
Kimberley
area of southern
British Columbia
. Big Copper is a high-grade copper-silver occurrence hosted in mid-Proterozoic
rocks. Copper-silver mineralization has been traced for 4.5 km along strike and is exposed in a
series of outcrops, adits and trenches over approximately
500 m
of vertical relief. Big Copper
likely belongs to a class of stratabound replacement copper-silver deposits hosted within mid –
Proterozoic quartzitic sediments. The style and stratigraphic setting of mineralization at Big
Copper may be analogous to similar stratabound silver-copper deposits in
NW Montana
, e.g.
the Troy Mine (a significant past producer of copper and silver) or
Hecla's
Montanore pre-
development project, with a reported inferred resource of 112 million tonnes at 54.8 g/t Ag and
0.7% Cu. (Hecla Mining Company 2020 Annual Report, pg. 119.
www.hecla-mining.com).
2
Footnote (2).
The qualified person has been unable to verify this inferred resource.
3
.
Duncan Lake Zinc.
Duncan is a carbonate hosted silver-lead-zinc deposit located near Duncan
Lake in southern
British Columbia
. The deposit is hosted within a Cambrian age Badshot
Limestone which also hosts Ag-Pb-Zn mineralization at Teck Resources Limited recently
producing Pend D'Oreille mine as well as past producers including the Blue Bell Mine, Reeves
MacDonald Mine, Jersey-Emerald and HB Mines. Mineralization at Duncan Lake forms in the
crest and limbs of the regional scale Duncan Lake anticline, where strong lead-zinc +/- silver
mineralization has been traced by surface and underground drilling for approximately
2,500 m
.
At Duncan Lake, Rokmaster will be targeting >30 Mt of >10% Pb+Zn+Ag. Historical
background and a geological synthesis of the Duncan Lake deposit is provided in a NI 43-101
report by
Lane, B., 2018: Technical Report on the Duncan Lake Project.
CAUTIONARY NOTE REGARDING FORWARD LOOKING STATEMENTS: This news release may
contain forward-looking information within the meaning of applicable securities laws ("forward-
looking statements"). Forward-looking statements are statements that are not historical facts and
are generally, but not always, identified by the words "expects," "plans," "anticipates," "believes,"
"intends," "estimates," 'projects," "potential" and similar expressions, or that events or conditions
"will," "would," "may," "could" or "should" occur. These forward-looking statements are subject to a
variety of risks and uncertainties which could cause actual events or results to differ materially from
those reflected in the forward-looking statements, including, without limitation: risks related to
fluctuations in metal prices; uncertainties related to raising sufficient financing to fund the planned
work in a timely manner and on acceptable terms; changes in planned work resulting from weather,
logistical, technical or other factors; the possibility that results of work will not fulfill expectations and
realize the perceived potential of the Company's properties; risk of accidents, equipment
breakdowns and labour disputes or other unanticipated difficulties or interruptions; the possibility of
cost overruns or unanticipated expenses in the work program; the risk of environmental
contamination or damage resulting from Rokmaster's operations and other risks and uncertainties.
Any forward-looking statement speaks only as of the date it is made and, except as may be
required by applicable securities laws, the Company disclaims any intent or obligation to update any
forward-looking statement, whether as a result of new information, future events or results or
otherwise.
SOURCE
Rokmaster Resources Corp.
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For further information:
Mr. John Mirko, President & CEO of Rokmaster Resources Corp.,
[email protected], Ph. 1-604-290-4647 or the Company's website: www.rokmaster.com
CO: Rokmaster Resources Corp.
CNW 06:00e 24-NOV-21