PRELIMINARY REPORT ON A PROTEROZOIC (?) STOCK IN THE PURCELL SUPERGROUP AND COMPARISON TO THE CRETACEOUS WHITE CREEK BATHOLITH, SOUTHEASTERN BRITISH COLUMBIA (82F/16,82K/Ol)

In southeastern British Columbia many inhusive suites lack conclusive radiometric age dates. The purpose of this BSc. project is to study three of the intrusions in the Purcell Mountain Range and provide uranium-lead geochronological results on two of these to refme the igneous magmatic history of the region. The White Creek Batholith (WCB) and the Greenland Creek Stock (GCS) are located approximately 45 km northwest of Cranbrook. B.C. The H&oaring Creek Stock (HCS) is situated 15 km west of Cranbrook(Figure II-I). All three intrude lower greenschist grade regionally metamorphosed Aldridge Formation, a middle Proterozoic basin till succession (Hey, 1993), and cut the 1467 + 3 Ma Moyie Sills (Anderson and Davis, 1995). Reesor (1958) completed previous mapping and a comprehensive study of the White Creek Batholith. Since that time, mining companies conducted a number of exploration projects searching for economic deposits of tungsten and massive sulphides. The Hellroaring Creek Stock was originally located by Rice (1941), during a regional study, and a more detailed map was published by Leech (1957). It was regarded as an intrusive of possible economic interest with exploration projects focusing in on the potential for beryllium and industrial minerals.