GEOLOGY OF THE CHUTINE RIVER - TAHLTAN LAKE ARIlA, NOFLTHWESTERN BRITISH COLUMBIA

Tahltan Lake (104G113) map areas. This work adjoins and locally updates mapping in the Yehiniko Lake and Scud River areas (Brown and Gunning, IY8Y)a. b: Brown and Greig; IYYO. Browl: c t r r l . , 1990). The project objectives are to provide new 1:SO OOO-scale geologic maps accompanied by up-to-date geochemical and mineral occurrence data. and an assessment of thc mineral potential of the area. Geological highlights (if the I Y Y I lield beayon include the discnvery of previously unrecogni7.ed phyllitic Stikine assemblage rocks north of the Rarrington River; subdivision of the Stuhini Group; and identification of two s~na l l , previously unmapped Alaskan-type ultramafic bodies. Included here i s a summary o f preliminary observations and ideas, and ;I simplified vrrbion n f the I:% 000-scale geology map to be released as Open File 1992-2. The study area w..w accessed by helicopter and float plane from Telegraph Creek, approximately 30 kilometres to the east (Figure I-IS-I). Previous geologic mapping was conducted by Kerr (194X) in the Stikine and Chutine river areas