93K

GSC Open File 1766/BC RGS 57 includes analytical and statistical data compiled from a reconnaissance-scale geochemical survey conducted in the Fort Fraser (NTS 93K) map sheet during 2002.  Stream sediment and water samples were collected from 795 sites covering over 10,500 square kilometers at a density of one sample per 13.2 km² (Figure 1).

Survey results include 49 variables in stream sediments, fluorine and loss-on-ignition in sediments, and pH, uranium, fluoride and conductivity in stream waters.  In addition, 186 stream water samples were analyzed for trace and major elements.

There are over sixty known mineral occurrences in the Fort Fraser area including the Endako molybdenum mine.  This very accessible region for exploration has potential for volcanogenic massive sulphide (VMS) mineralization mesothermal vein (Au), epithermal vein (Au, Ag) and Cu-Mo porphyry mineralization.  The area is underlain by volcanic and sedimentary rocks of the Mesozoic Cache Creek, Takla and Hazelton Groups and by Jurassic-Cretaceous quartz monzonite to granodiorite plutons.  A NATMAP project over the area carried out by the BC Geological Survey and the Geological survey of Canada between 1995 and 1999 included geological mapping, till geochemical and lake sediment surveys.

Figure 1

Acknowledgements

In collaboration with the Geological Survey of Canada, the Fort Fraser survey was designed and managed by the BC Geological Survey Branch. The BC Ministry of Energy and Mines and Targeted Geoscience Initiative (TGI) provided funding.

P.W.B. Friske and R.E.W. Lett directed the survey and coordinated the activities of the various contractors, BC Geological Survey Branch (BCGS) staff and Geological Survey of Canada (GSC) staff. Contracts were awarded to the following companies for sample collection, preparation, and analysis, and were managed by the listed BCGS and GSC staff: