Nickel Plats Project Summary
Nickel-Copper (Platinum Group Metal) Potential
Pacific North West Capital (PFN) is seeking a
partner to finance exploration of its Nickel Plats Project, in north-central
Saskatchewan (Figure 1). The Nickel Plats Project is 100% owned by PFN, 75 km
north of the town of La Ronge, and underlain by Proterozoic age rocks.
Nickel-copper sulphide mineralization is hosted in a small, elliptical
mafic-ultramafic intrusion at Gochagar Lake.
Access and Claims
The Nickel Plats Project properties are accessed
via float or ski equipped aircraft or by helicopter. A historic drill route was
established into the property westward from Saskatchewan Highway 102.
The Nickel Plats Project area is located at or near a terrain boundary underlain by Proterozoic rocks of the Hearne-Reindeer and Reindeer zones to the east of the Archean Hearne Craton and northwest of the Archean Sask Craton. The Reindeer zone forms the core of the Trans-Hudson Orogen and is subdivided into the Rottenstone and La Ronge domains (Figure 3). The Rottenstone domain consists of mainly metasedimentary rocks intruded by tonalite-trondhjemite plutons and small mafic- ultramafic intrusions. The grade of regional metamorphism ranges from lower amphibolite to upper amphibolite. The mafic-ultramafic intrusions are the foci of PFN's exploration interest.
Geology of the Nickel Plats Project
The geology of the Nickel Plats Project properties is shown in Figure 4. All three properties are underlain by gneissic to migmatitic metasedimentary rocks with or without metavolcanic rocks, intermediate to felsic intrusions and, locally, mafic-ultramafic plutons. The pluton at the Gochagar Lake Property is a multiphase intrusive complex consisting of a core of hornblendite and a margin of diorite that was intruded by gabbro. The gabbro is described as relatively fresh which contains xenoliths of the metasedimentary country rocks and hosts nickel-copper sulphide mineralization. The mineralized host rock types are norite, websterite, hartzburgite, hornblendite and even the surrounding metasedimentary rocks.
Exploration History and Mineralization
Historic exploration on the properties has focused on nickel-copper sulphides and on gold. The nickel-copper sulphide exploration was carried out mainly by the Scurry-Rainbow Oil Company Limited in the 1960s, with prospecting, geophysical surveys, soil sampling surveys, and diamond drill programs and trenching of gossans in an area measuring 1000 metres by 300 metres on a small elliptical gabbro intrusion. A total of 85 drill holes mostly vertical holes (for 27,400 m) on 13 sections delineated the mineralized Gochagar A-Zone (or Main Zone) for a strike length of 330 metres, widths of up to 120 metres, and depths of up to 305 metres (Figure 5). The Gochagar A-Zone mineralization (Figure 6) consists of disseminated mm-cm size blebs of sulphide, net-textured sulphide and, in places, semi-massive to massive sulphide pods and fracture fillings. The sulphide minerals present are pyrrhotite and smaller amounts of pyrite, pentlandite, chalcopyrite and bornite. Nickel grades of up to 2.4%, Cu 0.7%, Co 0.23% and 0.005 oz/ton Pt+Pd (Table 1) are reported. Subsequently, other companies and individuals carried out mapping and prospecting and ground geophysical surveys intermittently until about 1990. In 1988-1990, McNickel Inc. drilled 8 angled holes on the Gochagar A-Zone. Despite all this historic work, the geometry of the host gabbro and the details of the drilling and assumptions for the historic resource estimates remain uncertain. Few deviation tests were performed on the drill holes and many of the original records are lost.
Gold was discovered 15 km north of the Gochagar deposit during historic exploration on what is currently the north property of the Nickel Plats Project (Figure 4). A 1-metre channel sample returned an assay of 103.6 gpt Au and 7.7 gpt silver from the Cook Gold showing. The showing is hosted by a folded vein complex traced over a strike length of 18 metres. In addition to native gold, other minerals present in the veins or the altered wall rock are pyrite, chalcopyrite, bornite, malachite, native copper, pyrrhotite, galena, sphalerite, arsenopyrite and specular hematite. The Cook Gold showing remains to be drilled.
It should be noted that the Gochagar deposit is
located 65 km south of the Rottenstone Ni-Cu Mine. The Rottenstone Mine property
is currently owned by Canada Platinum Corp.
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