A 48-page study published by the Geological Survey Branch of the British Columbia Ministry of Energy, Mines and Petroleum Resources describes the geology of a large portion of the Atlin gold camp.
Bulletin 94, titled “Origin and tectonic setting of ophiolitic ultramafic and related rocks in the Atlin area, northwestern British Columbia” and accompanied by a 1:25,000-scale geological map, was written by Christopher Ash.
The bulletin represents the initial stage of a 3-year provincial study of the regional and local lithotectonic controls on the development of mesothermal gold-quartz vein deposits.
Mesothermal gold-quartz veins and their derived placers have long been recognized as associated with ultramafic rocks in British Columbia. Throughout the Atlin camp (historically the second largest producer of placer gold in the province), the significance and interpretation of the ultramafic rocks has varied.
The report documents the origin, tectonic setting and history of ultramafic rocks throughout the camp. An updated tectonic interpretation of the area is presented.
Bulletin 94 is available from Crown Publications in Victoria, B.C., for $40 by telephoning (604) 386-4636 or faxing (604) 386-0221.
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