This DOK 35 occurrence is underlain by undifferentiated volcanic and sedimentary rocks of the Upper Triassic Stuhini Group. The dominant rock type is a deformed, faulted and altered andesite, which is intruded within a few kilometres of the occurrence by a granitic stock. Tabular to irregular masses of syenite and rhyolite intrude the andesite and the granitic stock. These share the deformation and alteration of the enclosing andesite.
The andesite is irregularly but pervasively altered by propylitization, producing zones of epidote and saussurite. Epidote is abundant as veins and fracture fillings, and is sometimes associated with white quartz.
Diffused pyrite in small irregular patches is common, and can form dark red gossans. Several major gossans in the area contain greater concentrations of copper minerals. These occur as malachite and azurite with minor chalcopyrite and chalcocite. These minerals occur as tabular bodies, thin fracture fillings, and discontinuous veins up to 60 centimetres wide and 30 metres long. These veins are steeply dipping and have pronounced north and east trends. Molybdenite was also found in quartz veins about 5 centimetres wide and traceable for a few metres.
In 1989, the highest values obtained were from sample No. 2951 which graded 1.4 per cent copper and 42 gram per tonne silver (Assessment Report 19128). It was obtained from a float sample of sheared volcanic rock of mostly andesitic composition containing about 10 per cent pyrite, less than 0.5 per cent chalcopyrite and moderate malachite and azurite staining. The origin of this sample was thought to have been a small shear zone (visible from the air) on bluffs at the headwaters of the creek where the Dok 35 showing is plotted.
Work History
Empire Mercury Corporation Ltd in December 1969 optioned 28 claims from Peter Svensma, John Anderson, Wm. Buchholz, and Beverley McFadden. Canadex Mining Corporation Ltd carried out geological mapping and a soil geochemical survey over the Dok 1-36 claims in 1970. In an agreement of September 1970 Empire Mercury, and the original owners, optioned 52 claims in the Dok, Pete, and Thelma groups to The Swiss Aluminum Mining Co of Canada Ltd. The company name (Empire) was changed in December 1970 to Empire Metals Corporation Ltd. In 1971 and 1972, Swiss Aluminium Mining Company of Canada Ltd conducted a series of exploration programs including line-cutting, grid soil sampling, ground geophysics including magnetometer and an induced polarization survey over 26 kilometres, geologic mapping, prospecting, hand-pitting, and five diamond drill holes totalling 804 metres. See Doc (104G 043) for details of where most of this work was done.
In 1989, Pacific Rim Mining operated the Dok 1-6 and Continental Gold Corp owned the claims. Prospecting, geological reconnaissance and stream sediment sampling was carried out on all the claims in the Dok group (Dok 1-6). During the season 12 silt and 12 rock samples were collected of which 9 were float.
In 1990, geochemical sampling by Continental Gold Corp was reported to be less than encouraging for those areas investigated.
In the late 2000s, five main areas of interest within the BRC Property of Brades Resources Ltd covered a large area between Dokdaon Creek and Yeheniko Creek. These are referred to as the Dok 35 area, the Teck Area, the Yeti Area, the Strata Creek Area, and the Yehiniko East Area. BRC carried out a preliminary exploration program in the fall of 2007 consisting of airborne geophysical surveys and a limited program of verification sampling. Airborne surveys were carried out by Fugro Airborne Surveys primarily in the Strata Creek area and verification sampling was carried out in the southwestern part of the claim group in the area referred to as the Teck area that contains the Marg West (104G 058) and Marg East (104G 089) showings. In 2010, Brades Resources completed detailed digital topographic maps of the Teck and Yeti areas and compiled all historic rock, soil and stream sampling data for the entire BRC Property. Later in 2010, Brades conducted detailed topographic mapping to cover additional parts of the BRC property and several helicopter assisted site visits were completed to verify mineralization reported in the central part of the BRC property. A total of 24 rock samples were collected. In late 2010 to January 2011 a detailed structural analysis of the Teck area and the Yeti area was carried out using shaded hillside imagery technology.
Between 2011 and 2015 Brades collected a total of 205 soil samples from three separate areas within the DOKX Property (referred to as the West Boundary Grid, the East Boundary Grid and the Doc 35 Grid) (Figure 8, Assessment Report 35278, 36987). Results confirmed the presence of strongly anomalous copper values in soils in the Boundary East Grid (located immediately south of the properties northern boundary) and the Doc 35 Grid (located approximately 1.5 kilometers south of the properties northern boundary)..The DOKX Property is located in the western part of the original BRC Property and covers parts of a rugged, steep sided, southeast oriented ridge along the north side of Dokdaon Creek.
In 2016, ASTER maps were produced showing sericite-illite, kaolinite and iron alteration areas, in the DOKX and Yeti areas (Assessment Report 36490).
In 2017 Brades Resouce Corp. completed a follow up exploration program in the Doc 35 grid area. A total of nine soil and rock samples were collected to assess north extensions of the “copper in soil” anomaly identified by previous surveys. In the reviewing of historic 1990 data the owners of DOKX and Yeti blocks realized that a significant nickel geochemical anomaly (up to 1050 ppm nickel) within the Yeti claims had been recorded in Assessment Report 21168.
During 2018 Carl Von Einsiedel completed an extension of the 2011 airborne magnetic and radiometric survey done on the adjoining property over the DOK prospect (104G 043). A total of 47 line kilometres of survey were completed over the DOKX (DOK 35) project including 43 line kilometres flown at an orientation of 157/337 degrees and 4 kilometers of tie lines flown at 067/247 degrees. On the Yeti project (104G 194), a total of 78 line kilometres of airborne magnetic and radiometric surveying were completed in 2018 including 71 line kilometres flown at an orientation of 002/182 degrees and 7 kilometers of tie lines flown at 092/272 degrees. The line spacing was 200 meters.
