Ground geophysical investigations over the Casmo molybdenite deposit

CIM Bulletin, Vol. 76, No. 852, 1983

A. SACIT SAYDAM, Senior Geophysicist, Shell Canada Resources Limited, Calgary, Alberta

Induced polarization/resistivity and magnetometer surveys have been carried out over the Casmo molybdenite deposit in mountainous terrain of northern British Columbia. Molybdenite occurs in quartz-bearing fractures with or without pyrite along a zone of hydrothermal alteration and intense fracturing, believed to be a northerly dipping fault zone, within medium-grained equigranular and porphyritic quartz monzonite. The molybdenite-bearing zone is characterized by a significant resistivity low, a metal factor high and a subtle IP low flanked by highs outside the mineralized area. Magnetic trends, indicated by a magnetometer survey, generally parallel the zone and strike direction of the different intrusive phases, and have been helpful in delineating contacts and faults in the area.

Mots Clés: Mineral exploration, Casmo deposit, Molybdenite deposit, Magnetometer surveys, IP resistivity surveys, Geophysics.