Semi-massive pyrite, magnetite with minor sphalerite and chalcopyrite in quartz gangue occupy a southwest dipping, northwest striking zone in altered rhyolite tuffs of the Lower Jurassic Hazelton Group, Nilkitkwa Formation. The zone is up to 15 metres wide and 175 metres long, and is not known to contain significant gold or silver concentrations.
A foliated diorite sill, which dips moderately to the southwest, intrudes the rhyolitic tuffs. The upper part of the sill is porphyritic and approaches granodiorite to quartz monzonite in composition. Clay, chlorite, carbonate, sericite and quartz alteration is pervasive with disseminations and fracture-fillings of pyrite, chalcopyrite and molybdenite. Above the contact, a zone of disseminated and banded pyrite extends into altered rhyolitic volcanic rocks. The best molybdenum and copper grades are found at the transition from argillic to propylitic alteration which marks the compositional change from porphyritic quartz monzonite to foliated diorite. The diorite sill is cut off to the west by a fault and south of the sill limy sediments overlie the volcanics.
Diamond drilling in 1991 intersected maroon feldspathic tuffs, breccias, epiclastics and andesitic flows. Native copper and bornite were observed in maroon andesites.
WORK HISTORY
The Summit and HB claim groups, owned by P.H. Chapman, were under option i n 1973 to Hudsons Bay Oil and Gas Company Limited. Work during the year included geological mapping, a magnetometer survey over 10.5 line-miles, a geochemical soil survey (225 samples), and 366 metres of diamond drilling in 3 holes on Summit 1, 2, and 7 claims.
In 1969, the Burbridge Lake Property was staked by Me1 Chapman after lying undeveloped for numerous years. In 1973, the property was optioned by Hudson's Bay Oil and Gas Company Limited, who conducted a program of geological mapping, a ground magnetometer survey, geological soil sampling and 366 meters of diamond drilling in three holes. The option agreement was then terminated due to unfavourable results.
In 1974, Cities Service Minerals Corporation acquired a working option on the property and completed an induced polarization. The company drilled 485 metres of diamond drilling in two holes but did not encounter any significant mineralization and the option was terminated.
In 1976, Asarco Explorations Company of Canada Limited did a cursory examination of the structural and stratigraphic setting of the area of mineralization. With Hudson's Bay Oil and Gas Company Limited and Cities Service Minerals Corporation, a drill program set up. In 1977, Asarco Explorations Company laid out a diamond drill program to drill six holes. The results confirmed that the diorite is a sill like body dipping to the southwest. The work option was terminated.
In 1980, D. Groot Logging Ltd of Smithers, British Columbia reviewed all of the pertinent data from previous work done on the Burbridge Lake property, and came to the conclusion that there could be a possibility of increased amounts of copper and molybdenum in the stockwork to the west of previous Asarco diamond drill holes.
An agreement was made to gain control of the property from Mr. Mel Chapman. A detailed geochemical survey program was conducted over four areas of the property. Four Diamond Drill holes were drilled. The first three holes were drilled to see if the diorite sill increased in mineralization the west and also a westerly extension of the sill. The results showed that the mineralization did not increase above the previous encountered amounts and also that the diorite sill is cut-off by a fault to the west between diamond drill hole 80-2 and 80-3. The fourth drill hole was drilled on the eastern part of the property above Camp Lake. This drilling was done in attempt to intersect small copper, silver veins that appeared on surface. This diamond drill hole did not pick up any vein extensions at depth. Some cat trenching and hand trenching was also done over a few areas of the property. Nothing of any significance was found of the trenching.
In 1981, D. Groot Logging Ltd decided to diamond drill in an area where the previous year geochemical program came up with some high anomalies in two different zones. Five diamond drill holes totalling of 491.2 metres were drilled. The first three diamond drill holes were put in on the southwest part of the property based on high soil sample readings from the 1980. No significant mineralization was encountered in any of these diamond drill holes. The two other diamond drill holes were drilled in the central part of the property, southeast of Burbridge Lake. These diamond drill holes were also drilled to check the area of high anomalies obtained from 1980 field work. No significant mineralization was encountered from this drilling.
In 1991, D. Groot Logging Ltd completed 8 diamond drill holes were drilled on the property to check out the magnetometer anomalies that were discovered by Hudson's Bay Oil and Gas Company Limited in 1973 (Assessment Report 21641). Results were not considered to be of any significance.
In 1996, D. Groot Logging had an IP; ground magnetic and VLF Survey conducted over 37.6 kilometres of new line cutting. The results of the surveying showed that the area has a potential of for mineralized zones that occur from shallow to deep horizons on the eastern to central part of the surveyed area.
