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Rokmaster Resources Corp (2)
Symbol RKR
Shares Issued 105,185,212
Close 2021-12-20 C$ 0.37
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Rokmaster acquires 123 hectares in Southern B.C.

2021-12-20 07:24 ET - News Release

Mr. John Mirko reports

ROKMASTER UPDATES ITS ADVANCED STAGE DUNCAN LAKE ZN-PB-AG PROJECT

Rokmaster Resources Corp. has provided 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.

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 about 15-kilometre-long claim package hosts 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. 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 (see attached table). The size and frequency of these occurrences demonstrate the strength of the metallogenic system at Duncan Lake.

PROSPECTING SAMPLES DUNCAN LAKE ZINC OCCURRENCES (1) 
    
Ag g/t            Pb %           Zn %        Pb+Zn %

 23.00           13.00          21.44          34.44
  7.84           11.73          18.25          29.98
  8.00            8.35          21.55          29.90
 11.00            5.55          24.23          29.78
 20.00           11.07          17.78          28.85
 12.00            6.82          18.55          25.37
 10.00            8.53          16.27          24.80
 11.00            5.66          19.10          24.76
  5.78            4.77          16.25          21.02 
  5.00            3.45          16.30          19.75
 14.92            3.55          15.70          19.25
  6.00            4.11          14.95          19.06
  6.74            0.07          16.83          16.90
 11.00            3.44          11.95          15.39
  7.00            1.11          12.36          13.47
  5.60            2.09          10.00          12.09
  3.00            0.14          10.43          10.57
 78.00            9.38           0.23           9.61
  4.00            3.81           5.42           9.23
  3.25            3.67           4.60           8.27
 14.25            6.26           1.78           8.04
  3.00            0.26           7.58           7.84
  1.85            1.19           5.71           6.90
  1.58            0.07           6.57           6.64
  0.50            0.15           6.28           6.43
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 and 1960 followed by substantial underground and surface diamond drilling which continued through to 1997. The Duncan mine prospect (Duncan No. 5 to No. 8 zones) contains a historical resource of 3.9 million tonnes grading 3.2 per cent Zn and 3.1 per cent Pb (Lane, 2018) (2) (3). Work undertaken by Cominco geologists (1989 to 1997) pursued the No. 7 and 8 mineralized zones onto what is now Rokmaster ground. These drill holes were collared on very broad 300 to 350 m centres. 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 lead-zinc plus or minus silver mineralization following the No. 7 zone to the northwest was exemplified by the results of DDH C89-5: 7.1 per cent Zn and 4.6 per cent Pb over 8.0 m; DDH C91-7: 11.4 per cent Zn and 0.8 per cent Pb over 4.8 m; and DDH C97-12, 6.2 per cent Zn and 6.3 per cent Pb over 7.5 m (2). Drilling was targeting the antiformal closure off the Duncan anticline. Although the anticline is considered to be tight, no drill holes penetrated the western limb of the anticline with all currently known Pb-Zn mineralization concentrated along the crest and within the eastern limb position. On Rokmaster's property, the Duncan mine sulphide zones have been followed for an additional 900 to 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 drill holes. This area remains untested by surface drill holes. Rokmaster's Duncan Lake zinc project has:

  • Room to discover mineralization, at the kilometre scale, in the direction of increasing Ag-Zn-Pb trends;
  • 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-hectare claim package which overlies the Two Brothers and President Crown grants. These claims provide an additional 1,800 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. The data suggest 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 drill hole (44.7 m) which failed to intersect bedrock.

Northwest zonation in the direction of increasing silver is suggested by:

  • Cominco's drilling on the northwesterly continuation of the No. 8 zone at Duncan Lake, now on Rokmaster ground, where 74 drill hole samples contained greater than 0.5 g/t Ag, averaged 1.7 g/t Ag;
  • Drilling by Cominco in 1997 did not assay for silver. Resampling of 1997 core demonstrated that five of 21 samples returned silver grades of over 3.5 parts per million Ag (Lane, 2018 (4)). Lane reported that "silver may be an important contributor to certain mineralized intervals."

On the President silver trend, on the northwest side of Duncan Lake, the data of MacGregor (1981) (5) list 20 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 chief executive officer 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 multicommodity 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."

(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 the associated table have been compiled from data collected in 2021, 2019 and 2018 using a cut-off, with one exception, of 6 per cent lead plus zinc for inclusion in this table.

(2) (4) R.A. Lane, 2018. Technical Report on the Duncan Lake Zinc-Lead Project. Internal Corporate Report for Rokmaster Resources, 75 pages.

(3) Reported widths of mineralization are drill hole intervals or core length recovered. Insufficient data exist to permit the calculation of true widths of the reported mineralized intervals.

(5) A.L. MacGregor, 1981. Geochemical and Trenching Report on the Howser Group Duncan Lake area. British Columbia Department of Mines and Petroleum Resources, Assessment Report No. 9480.

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, B.C. All prospecting rock samples were shipped to MSA Labs in Langley, B.C. MSA is an International Organization for Standardization 17025 (testing and calibration laboratory) and an ISO 9001 (quality management system) certified laboratory. Rock samples were crushed to two millimetres and a 500-gram subsample was pulverized with 85 per cent of the sample passing 75 microns. The subsample was analyzed using a combination of MSA Labs ICF-6Pb or ICF-6Zn four-acid digestion of a 0.2-gram pulp, with analysis by ICP-AES (inductively coupled plasma atomic emission spectroscopy) ore grade. Additional elements were by IMS-117, a 39-element, 20-gram pulp, using a 1:1 aqua regia digestion followed by ICP-AES/MS at ultratrace levels. QA/QC 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, B.C. MSA is an ISO 17025 (testing and calibration laboratory) and an ISO 9001 (quality management system) certified laboratory. Rock samples were crushed to two mm and a 500-gram subsample was pulverized with 85 per cent of the sample passing 75 microns. The subsample was analyzed using a combination of MSA Labs FAS211 for Au and ICP-240 (four-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, PGeo, who is independent of Rokmaster and who acts as Rokmaster's qualified person.

About Rokmaster Resources Corp.

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 kilometres north of the city of Revelstoke. Revel Ridge is a high-grade gold and polymetallic orogenic sulphide deposit which has been the subject of a preliminary economic assessment technical report dated Dec. 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 four km along strike and is exposed in a series of adits and trenches over approximately 400 to 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 northwestern Montana, such as the Troy mine (64 million tonnes of 0.74 per cent 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 per cent Cu (Hecla, 2020 annual report, page 119.). (2)
  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 plus or minus silver mineralization has been traced by surface drilling for approximately 2,500 m. At Duncan, Rokmaster will be targeting over 30 million tonnes of over 10 per cent Pb plus Zn and Ag. Historical background and a geological synthesis of the Duncan Lake deposit are provided in a National Instrument 43-101 report by B. Lane, 2018: Technical Report on the Duncan Lake Project.

The qualified person has been unable to verify this inferred resource.

We seek Safe Harbor.

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