Barker Minerals Ltd.
Since Mr. Doyle's discovery in 1993, the Company has been exploring in this mineralized district, which has potential to host volcanogenic massive sulphide (VMS), gold, platinum group metal (PGM) deposits and exploration results indicate diamonds may be present. The properties are located along the southern extension of the historic Cariboo Gold District in East-Central British Columbia, Canada.
The mineralization is considered by independant consultants, the Geological Survey of Canada, the B.C. Geological Survey and Major Mining Companies to be similar to other massive sulphide and gold districts from around the world.
The Company maintains an exploration office in the town of Likely, 45 km to the southwest of the Ace project. Access to the property is excellent, as a graded logging road, as well numerous secondary logging roads run through the property. The Company's Ace project is at an elevation of approximately 1,000 meters, enabling year-round advanced-stage exploration if desired.
Property Description and Location
The mineral claims comprising the property are 100% owned by Barker Minerals Ltd. mineral exploration project areas which are currently under active exploration include: Frank Creek, Black Bear, Tasse and Cariboo.
Accessibility, Climate, Local Resources, Infrastructure and Physiography
Williams Lake is an intermediate-sized city, which is served by Highway 97, the B.C. Railway, a major hydroelectric power grid and a modern airport. By road, Likely is 65 km northeast of 150 Mile House on Highway 97. Access to the Ace, Frank Creek and SCR exploration areas is via gravel logging roads bearing northeast from Likely. The distances from Likely to the main showings are as follows: Ace, 45 km; Frank Creek, 25 km; SCR, 22 km. Access to the Quesnel Platinum project is mainly via gravel logging roads southeast from Quesnel, at a distance of 25 km. In Likely, Barker Minerals maintains a property that includes a house, a bunkhouse, a workshop and a few tents. The house serves as a field office.
The property is situated in the central part of the Quesnel Highland between the eastern edge of the Interior Plateau and the western foothills of the Columbia Mountains. This area contains rounded mountains that are transitional between the rolling plateaus to the west and the rugged Cariboo Mountains to the east. Pleistocene and Recent ice sheets flowed away from the high mountains to the east over these plateaus and down to the southwest (Cariboo River), west (Little River) and northeast (Quesnel Lake), carving U-shaped valleys. The elevation ranges from 700-1650 m.
Precipitation in the region is heavy, as rain in the summer and snow in the winter. Drainage is to the west via the Cariboo, Little and Quesnel Rivers to the Fraser River. Quesnel Lake, the main scenic and topographic feature in the region, is a deep, long, forked, glacier-carved lake with an outlet at 725 m elevation. Vegetation is old-growth spruce, fir, pine, hemlock and cedar forest in all but the alpine regions of the higher mountains (mainly above 1400 m elevation). Weldwood has been actively logging fir, spruce and pine in the area, principally during winters, and has provided outlines of existing and planned roads and cut-blocks in and near the project areas.
Deposit Types Sought:
The company is exploring the property for the following types of deposits
Volcanogenic Massive Sulphide (VMS) Deposits
Conformable, semi-massive to massive sulphide deposits of the Besshi type occur in the Kootenay terrane (Goldstream deposit), in the Yukon-Tanana and Nisling terranes and in the Klondike schist. Recent BC Geological Survey work suggests that these may all be part of an elongate terrane that also includes the Barkerville terrane (Hoy and Preto, 1996). Host rocks are deformed complexly and metamorphosed to micaceous quartzite, phyllite and schist, commonly graphitic. Marble and meta-volcanic rock lenses are common. Besshi-type deposits contain pyrite, pyrrhotite, magnetite and chalcopyrite, local sphalerite and rarely galena. Host rocks are mainly sedimentary, commonly siltstone, quartzite and carbonaceous schist near amphibolite (metamorphosed mafic volcanic rocks) at the VMS target at the Ace prospect may be of a different type; there, felsic volcanic rocks are present, mafic volcanic rocks are absent or altered so intensely that they cannot be recognized, and galena and sphalerite are important minerals. It is a known fact that VMS deposits normally come in clusters which make up a VMS District.
The sulphide-rich layers of mineralization of Barker Minerals' Cariboo Zn-Pb deposit have a higher-grade central section up to 1 m. thick of more massive sphalerite with scattered patches of galena, with dispersed and vein sphalerite-galena mineralization extending 2-3 m on either side. The high Zn/Pb ratio, moderate silver content and low gold content are similar to those of many replacement carbonate-hosted Zn-Pb deposits, including those in the Early Cambrian platform carbonates of the Kootenay arc.
Vein and Replacement Gold
Much of the lode and placer gold production from the Wells and Barkerville areas was from the eastern part of the Barkerville terrane, where most of the important present day lode gold prospects also occur. At the historic mines, the strata trend 315º, dip 45ºNE and are cut by north to northeast-trending normal faults dipping 60ºE. The zones of economically important quartz veins are contained in graphite-bearing layers near a contact with carbonate-bearing layers. Two sets of quartz veins contain pyrite and gold: transverse veins striking 030º and diagonal veins striking 070º; these contained 15-25% pyrite and 0.3-0.5 oz/st Au. Two other sets of quartz veins do not contain pyrite or gold. Pyrite in altered wall rock contained proportionally less gold. Replacement bodies of auriferous pyrite in carbonate rocks (mainly in the Island Mountain Mine north of Jack of Clubs Lake) accounted for nearly 1/3 of the lode gold mined. Other common sulphides in the mines are arsenopyrite, galena, sphalerite, cosalite (PbBiS), scheelite and bismuthinite (BiS2). Free gold commonly occurs with nests of cosalite. Gangue minerals are quartz and ankerite/siderite. Wallrock alteration minerals are ankerite and sericite.
"The Ace's host rock lithology and metal content suggest an affinity to well explored gold quartz veins of the Yanks Peak and Cow Mountain (IWA) areas to the north. The geological setting, style of mineralization and geochemistry suggest an analogy to the "Plutonic-associated" or "Pogo-Type" Gold vein model."
Bob Lane and Ken McDonald
Regional Geologist, Prince George, B.C., Dept. Of Mines
Magmatic PGE mineralization
Some of the PGM contents of the Quesnel River placer deposits are probably derived from ultramafic rocks situated along the Eureka fault between the Quesnel terrane and the Barkerville terrane and from mafic and ultramafic rocks in the Quesnel terrane. Barker Minerals' claims in this area were staked because of potentially favorable geology, the increase in the price of PGMs and the apparent lack of previous PGE exploration in this potentially favorable area. Magmatic, dunite-peridotite-hosted PGE mineralization is sought.
Initial Professional Opinion
"During my initial property examination, a dunite/peridotite ultra-mafic intrusion situated in one of Barker's project areas was observed to be the cause of one such aero-magnetic anomaly. This scarce and unique type of rock is a potential host for Platinum, Nickel and Chromium mineralization, such as that found in several localities worldwide (Tulameen, BC; Good News Bay, Alaska; Ural Mts., former USSR; Bushveld; Southern Africa)."
Dr. Bruce Perry Ph.D.,P.Geo, FGAC
December 18, 2000