THE McLYMONT NORTHWEST ZONE, NORTHWEST BRITISH COLUMBIA: A GOLD-RICH RETROGRADE SKARN? (104B) By G.E. Ray, Geological Survey Branch

The McLymont property is located close to the headwaters of McLymont Creek, a tributary of the lskut River; it lies at an elevation of approximately I I70 metres (3800 feet), about 2 kilometres southwest of Newmont Lake (Figure 2-l I-l) The property is currently being explored by Gulf International Minerals Ltd. It contains two styles of mineralization whose relationship to each other is uncertain. One of these, the “Camp zone”, consists of auriferous quartz-ankerite-pyrite-chalcopyrite veins hosted by a quartz-rich granite close to its contact with Triassic and Jurassic rocks. The second style, the “Northwest zone”, comprises steeply dipping and subhorizontal zones of magnetite-sulphide-gold mineralization hosted in Mississippian rocks. This paper describes the geology and mineralization of the Northwest zone, and is based on preliminary work that includes core logging, polished thin-section studies, microprobe analyses of garnets, galena-lead isotope analyses, and some trace element analyses (Table 2-l l-l).