BCGS GeoFile 2011-02: Final Frontier in the Golden Triangle: East Hoodoo Mountain Area

M.G. Mihalynuk, J.M. Logan and Z. Zagorevski

The Iskut River area of northwestern BC is characterized by exceptional mineral endowment, it is mostly enveloped by the fabled “Golden Triangle”. Westflowing lower Iskut River marks the northern edge of the south-pointing Golden Triangle. Rocks which host stratabound mineralization, such as at the Rock and Roll deposit, are apparently barren north of the river. There is no obvious geological explanation for the dearth of deposits north of the Iskut River edge of the Golden Triangle. However, a reason for the lack of deposits in the Hoodoo Mtn area (104B/14) may arise from the lack of a geological framework; much of the area has never been systematically mapped. A working partnership was established between the BC Ministry of Forests, Mines and Lands, the Geological Survey of Canada (GEMS), Pacific North West Capital Corp. and the University of Victoria to address this lack of public geologic knowledge.

BCGS GeoFile 2011-05: Biogeochemical Exploration Vectors in search of Carbonatite, Blue River, British Columbia

G.J. Simandl, R. Fajber, C.E. Dunn, B. Ulry and J. Dahrouge

Coniferous trees represent suitable sampling media in the exploration for carbonatites and related rare earth elements (REE), Ta, Nb, phosphate and fluorspar mineralization referred to in the British Columbia “Carbonatite Deposit profile N01” (Birkett and Simandl, 1999).

Twenty four samples of twigs with needles from coniferous trees (Subalpine Fir and White Spruce) were collected over the Upper Fir Ta, Nb and apatite-bearing carbonatite. The results indicate that carbonatite is detectable by biogeochemical methods. Light rare earth elements (LREE), Y, Zr and P are good exploration vectors for REE and apatite mineralization; whereas Ta and Nb are direct indicators for their own ores. Ta is found in detectable concentrations only in White Spruce twigs (41% of samples), and mainly those directly overlying mineralization, concentrations range from 0.001 to 0.003 ppm Ta. Nb concentrations are higher than those of Ta; concentrations range from 0.02 to 0.24 ppm Nb in White Spruce twigs, 0.00496 to 0.070814 ppm Nb in White Spruce needles (ash values normalized to dry weights), and 0.012011 ppm to 0.030214 ppm in Subalpine Fir needles (ash values normalized to dry weights).


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Release Notification 2011-03

February 10, 2011