The JS Molybdenite showing is located 24 kilometres north of Kamloops and is accessible via the Jamieson Creek logging roads.

Molybdenite mineralization is developed within metasedimentary rocks (argillites, quartzites and quartz muscovite schists) of the late Paleozoic Harper Ranch Group. The metasedimentary rocks are intruded by dioritic rocks (diorite and quartz diorite) which are possibly part of the Late Triassic to Early Jurassic Thuya batholith. The molybdenum mineralization is best exposed in a 20 by 20 metre area that has been tested by pitting. Molybdenite occurs as smears, on dry fractures, in quartz veins and as finely disseminated grains (Assessment Report 8500). Disseminated pyrite is associated with the molybdenum mineralization within the hornfelsed metasedimentary host rocks. The mineralization is exposed in a creek valley in a window within flat lying plateau basalts of Miocene age which cover most of the area.

A representative grab sample is reported to have yielded an assay of 0.098 per cent molybdenum. Isolated occurrences of chalcopyrite and molybdenite were noted within quartz veins within the intrusive unit (Assessment Report 8500).

Work History

The area has been explored in conjunction with the nearby Bonaparte (MINFILE 092P 050) occurrence and complete regional exploration history can be found there.

The prospect was staked as the Rave group in 1972 by Amoco Canada Petroleum Limited to cover a stream sediment molybdenum anomaly. Amoco completed a soil sampling program and geological mapping and related molybdenum soil anomalies to molybdenite mineralization in bedrock (Assessment Report 4665). The prospect was subsequently staked by Joe Schmising as the JS claim and a program of geological mapping and prospecting undertaken in 1980 (Assessment Report 8500).