Rokmaster Updates Its Advanced Stage Duncan Lake Zn-Pb-Ag Project
Rokmaster Updates Its Advanced Stage
Duncan Lake Zn-Pb-Ag Project
VANCOUVER, BC
,
Dec. 20, 2021
/CNW/ - Rokmaster Resources Corp. (TSXV: RKR) (OTCQB:
RKMSF) (FSE: 1RR1) ("Rokmaster" or the "Company") is pleased to provide an update on the 2021
exploration activities and expanded claim package at its advanced stage Zinc-Lead-Silver deposit at
Duncan Lake and on newly acquired ground on the "President Silver Trend", both in southeastern
British Columbia
.
Duncan Lake Overview - Figure 1 (CNW Group/Rokmaster Resources Corp.)
Regional Scale of Duncan Lake Zn-Pb Occurrences
Duncan Lake is one of a series of Zn-Pb-Ag carbonate hosted deposits which are associated with
Cambrian age limestones forming the western boundary of a prolific metallogenic belt, the Kootenay
Arc. Rokmaster's Duncan Lake ~15 km long claim package host numerous Pb-Zn-Ag occurrences,
including the Duncan No. 1 to 4 mineral occurrences and most significantly the northerly down plunge
extensions of the No. 7 and 8 Zones of Teck Resources' Duncan Mine Prospect. All of these Pb-Zn-
Ag occurrences follow the permissive Badshot limestone (
Figure 1
). The contact of the Badshot
limestone may form mineralized domains, with hundreds of metres to kilometre-scale strike lengths,
exemplified by the No.1 to No.8 occurrences. Prospecting samples, and the results of extensive soil
geochemical surveys highlight the positions of strongest Zn-Pb-Ag mineralized zones within the
project's 10 km long Badshot trend (Table 1). The size and frequency of these occurrences
demonstrates the strength of the metallogenic system at Duncan Lake.
Table 1. Prospecting Samples Duncan Lake Zinc Occurrences
1
Easting
Northing
Ag g/t
Pb %
Zn %
Pb+Zn
%
505485
5574048
23.00
13.00
21.44
34.44
505858
5571440
7.84
11.73
18.25
29.98
505502
5573996
8.00
8.35
21.55
29.90
506637
5571130
11.00
5.55
24.23
29.78
505888
5571322
20.00
11.07
17.78
28.85
506613
5571193
12.00
6.82
18.55
25.37
505500
5574000
10.00
8.53
16.27
24.80
506621
5571169
11.00
5.66
19.10
24.76
505859
5571441
5.78
4.77
16.25
21.02
505874
5571492
5.00
3.45
16.30
19.75
506734
5571109
14.92
3.55
15.70
19.25
505479
5574068
6.00
4.11
14.95
19.06
506760
5571122
6.74
0.07
16.83
16.90
506703
5571165
11.00
3.44
11.95
15.39
505531
5572941
7.00
1.11
12.36
13.47
506695
5571132
5.60
2.09
10.00
12.09
505566
5572899
3.00
0.14
10.43
10.57
506120
5567279
78.00
9.38
0.23
9.61
505651
5572777
4.00
3.81
5.42
9.23
505860
5571441
3.25
3.67
4.60
8.27
506200
5571349
14.25
6.26
1.78
8.04
505586
5572855
3.00
0.26
7.58
7.84
505861
5571442
1.85
1.19
5.71
6.90
506391
5571429
1.58
0.07
6.57
6.64
506153
5567233
0.50
0.15
6.28
6.43
503310
5579776
130.00
0.39
0.02
0.41
The Duncan Mine Prospect
The adjacent Duncan Mine Prospect was the focus of an underground development program by
Cominco in 1959-1960 followed by substantial underground and surface diamond drilling which
continued through to 1997. The Duncan Mine Prospect (Duncan No. 5 – 8 zones) contains a
historical resource of 3.9 million tonnes grading 3.2% Zn and 3.1% Pb (Lane, 2018)
23
. Work
undertaken by Cominco geologists (1989 to 1997) pursued the No. 7 and 8 mineralized zones onto
what is now Rokmaster ground. These drillholes were collared on very broad 300 –
350 m
centres,
Figure 2
. The results of this program suggested that the grade of Zn-Pb-Ag mineralization increases
to the northwest along the shallow plunge line of the Duncan anticline.
The increasing thickness and tenor of Pb-Zn+/- Ag mineralization following the No. 7 zone to the
northwest, was exemplified by the results of DDH C89-5:
7.1% Zn and 4.6% Pb
over
8.0 m
; DDH
C91-7:
11.4 % Zn and 0.8% Pb over
4.8 m
; and DDH C97-12, 6.2% Zn
and 6.3% Pb over
7.5 m
(
Figure 2
)
2
. Drilling was targeting the antiformal closure off the Duncan Anticline. Although the
anticline is considered to be tight, no drillholes penetrated the western limb of the anticline with all
currently known Pb-Zn mineralization concentrated along the crest and within the eastern limb
position (
Figure 3
). On Rokmaster's property, the Duncan Mine sulphide zones have been followed
for an additional 900 –
1,000 m
of strike length and remain open to the northwest. In addition, the
southern fence of 1997 drilling, DDH's C97-7, C97-15 and C97-16 core strong Pb – Zn results with
the Teck property boundary approximately
1,000 m
to the southeast of these drillholes. This area
remains untested by surface drillholes. Rokmaster's Duncan Lake Zinc Project has:
1
.
Room to discover mineralization, at the kilometre scale, in the direction of increasing Ag-Zn-Pb
trends.
2
.
Room to test the permissive anticlinal closure, on a kilometre scale on both the western and
eastern limbs of the Duncan Anticline within the often-fertile Badshot limestone.
Rokmaster and Acquisition of the President Showing – President Silver Trend.
Rokmaster has recently acquired a 123-ha claim package which overlies the Two Brothers and
President Crown grants. These claims provide an additional
1800 m
of strike length on northwestern
continuation of the Duncan Lake Zn-Pb-Ag trend. The additional claims fall along the northwest side
of Duncan Lake and are contiguous with Rokmaster's adjacent Duncan claims. At the President
Silver Trend, a strong, deep yellow-orange gossanous alteration and deformation zone follows the
northwest plunging trace of the Duncan Anticline. The occurrence was first tested by a series of
three short adits, totalling
210 m
where in 1893 the operators focus was on very high-grade silver-
lead mineralized zones. The occurrences are characterized by much higher silver grades, with 1980
trench samples cutting 531 g/t Ag over
1.0 m
,
Figure 4
. The data suggests that the mineralogical
zonation and increasing Ag-Pb-Zn tenor, first noted near the Duncan Mine, continues to the
northwest across Duncan Lake. The occurrence was targeted in 1976 by a single BQ drillhole (
44.7
m
) which failed to intersect bedrock.
Northwest zonation in the direction of increasing silver is suggested by:
1
.
Cominco's drilling on the northwesterly continuation of the No. 8 zone at Duncan Lake, now on
Rokmaster ground, where 74 drillhole samples contained greater than 0.5 g/t Ag, averaged 1.7
g/t Ag.
2
.
Drilling by Cominco in 1997
did not assay for silver
. Resampling of 1997 core demonstrated
that 5 of 21 samples returned silver grades >3.5 ppm Ag (Lane, 2018
4
). Lane reported that
"silver may be an important contributor to certain mineralized intervals".
3
.
On the President Silver Trend, on the northwest side of Duncan Lake, the data of
MacGregor
(1981)
5
lists twenty rock samples taken from three trenches that carry an average silver grade
of 42.1 g/t Ag. The progressive increase in silver content occurs over a strike length of 5.5 km,
on ground that is largely controlled by Rokmaster.
John Mirko
, President and CEO of Rokmaster stated:
"Rokmaster is in the enviable position of controlling a trinity of outstanding mineral occurrences
including: 1) the Revel Ridge orogenic gold deposit; 2) Big Copper, a highly prospective sediment
hosted copper-silver occurrence; and 3) Duncan Lake, an advanced stage carbonate hosted Zn-Pb-
Ag deposit. Any of these could be company builders and each should contribute significantly to
shareholder value and growth.
Duncan Lake represents a strong link in the multi-commodity occurrence chain which Rokmaster has
forged over several years of astute acquisition, exploration and project enhancement. Duncan Lake
has been recognized for decades as being one of the premier undeveloped Zn-Pb-Ag deposits in the
Kootenay Arc. With the acquisition of ground overlying the President Silver Trend, the full potential of
the Duncan Lake deposits may yet be realized. Rokmaster holds a valid permit (MX-5-802) to
undertake surface drilling on its Duncan Lake project and Rokmaster anticipates that that permit will
be utilized at a time most advantageous to its shareholders."
Footnote 1.
All samples are prospecting style rock grab or random chip samples. Not all samples should be considered representative of all mineralized zones within the
occurrences documented in part by these samples. Prospecting samples illustrated in Table 1 have been compiled from data collected in 2021, 2019 and 2018 using
a cut-off, with one exception, of 6% Pb+Zn for inclusion in this table.
Footnote 2.
4. Lane, R.A. 2018. Technical Report on the Duncan Lake Zinc-Lead Project. Internal Corporate Report for Rokmaster Resources, 75 pages.
Footnote 3.
Reported widths of mineralization are drill hole intervals or core length recovered. Insufficient data exists to permit the calculation of true widths of the reported
mineralized intervals.
Footnote 5.
MacGregor, A.L. 1981. Geochemical and Trenching Report on the Howser Group Duncan Lake area. British Columbia Department of Mines and Petroleum
Resources, Assessment Report No. 9480.
All figures attached and linked within this release are available at:
rokmaster.com/projects/duncan-lake-zinc/maps-and-figures/
Quality Assurance/Quality Control.
The press release documents the results of surface rock
samples collected over more than one year at Duncan Lake. All rock samples collected in 2018 and
2019 were shipped to MSA Labs in
Langley, British Columbia
. MSA All prospecting rock samples
were shipped to MSA Labs in
Langley, British Columbia
. MSA 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 ICF-6Pb or
ICF-6Zn four acid digestion of a 0.2 g pulp, with analysis by ICP-AES Ore Grade. Additional
elements were by IMS-117 a 39 element, 20g pulp, using a 1:1 aqua regia digestion followed by
ICP-AES/MS at ultratrace levels. QAQC for these samples utilized internal laboratory standards, no
external standards were submitted into the sample stream.
For rock samples collected in 2021, all samples were shipped to MSA Labs in
Langley, British
Columbia
. MSA 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 as set out in National Instrument 43-101 and reviewed and approved by
Eric
Titley P.Geo
., who is independent of Rokmaster and who acts as Rokmaster's Qualified Person.
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 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 N of the
City of Revelstoke
.
Revel Ridge is 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
Creston
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 km along strike and is exposed in a
series of adits and trenches over approximately 400 -
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 (64 million tonnes of 0.74% Cu and 54 g/t Ag (Western Mining History, 2020) or
Hecla's
Montanore Mine, 112 million tonnes at 51.2 g/t Ag and 0.7% Cu (
Hecla
, 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's currently producing Pend
D'Oreille mine as well as past producers including the Blue Bell Mine, Reeves MacDonald,
Jersey-Emerald and HB mines. Mineralization at Duncan Lake Zinc forms in the crest and limbs
of the regional scale Duncan Lake anticline, where strong lead-zinc +/- silver mineralization has
been traced by surface drilling for approximately
2,500 m
. At Duncan, 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.
Historical Drilling - Figure 2 (CNW Group/Rokmaster Resources Corp.)
Cross Cut of Section B - Figure 3 (CNW Group/Rokmaster Resources Corp.)
Soil Samples at President Area - Figure 4 (CNW Group/Rokmaster Resources Corp.)
SOURCE
Rokmaster Resources Corp.
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For further information:
contact Mr. John Mirko, CEO of Rokmaster Resources,
[email protected], Ph. 1-604-290-4647 or the Company's website: www.rokmaster.com; For
shareholder information please contact: Mike Kordysz, [email protected], Ph. +1 (604)
319-3171
CO: Rokmaster Resources Corp.
CNW 06:00e 20-DEC-21