The Jersey 6 (Lost Creek [Mut, Tungsten] Adit) occurrence is located on the south side of Lost Creek at an elevation of approximately 880 metres.
Regionally, the area is underlain by quartz arenite sedimentary rocks of the Neoproterozoic to Lower Cambrian Hamill Group, undivided sedimentary rocks of the Cambrian Laib Formation and mudstone, siltstone, shale and fine clastic sedimentary rocks of the Ordovician Active Formation, which have been intruded by granodioritic rocks of the Cretaceous Anstey pluton. The sedimentary rocks are folded into a series of generally north-trending anticlines and synclines.
Locally, a former adit exposes a garnet-diopside skarn zones within hornfelsed areas of Ordovician Active Formation argillite with interfingered silicious limestone of the Lower Cambrian Reeves member (Laib Formation) near their contact with Cretaceous granitic intrusive rocks. The skarn zones host disseminated pyrrhotite, pyrite and scheelite with minor magnetite, molybdenite and powellite. Autunite or uranophane are reported to occur within argillites. Tremolite, wollastonite, actinolite, biotite and potassium feldspar are also reported associated with the skarn zones.
In 1978, drillhole A-78-3, located along strike of the adit workings, intercepted two skarn horizons yielding intercepts of 0.015 per cent molybdenite; 0.177 per cent tungsten trioxide over 22.22 metres, including 0.163 per cent molybdenite and 0.378 per cent tungsten trioxide over 3.35 metres, and 0.142 per cent molybdenite and 1.60 per cent tungsten trioxide over 0.67 metre (Assessment Report 7041). Within this section, values up to 0.006 triuranium octoxide were also reported (Assessment Report 7041). Also at this time, four channel samples from the adit each yielded from 0.18 to 0.68 per cent tungsten trioxide over 0.6 metre (Assessment Report 7041).
In 2008, two samples (08P0S-08 and -09) yielded up to 0.184 per cent molybdenum and 0.710 per cent tungsten (Assessment Report 30619).
In 2009, diamond drilling yielded intercepts of 0.12 per cent tungsten trioxide over 22.8 metres in hole LC09-01, 0.18 per cent tungsten trioxide over 8.4 metres in hole LC09-02 and 0.10 per cent tungsten trioxide over 14.1 metres in hole LC09-03 (Assessment Report 31280).
The area has been historically explored since the early 1900s in conjunction with the nearby Molly (MINFILE 082FSW021) past-producing mine, and a short, southwest-trending adit was developed some time during the first half of the century.
In 1977 and 1978, Westwind Mines Ltd. and Benson Mines Ltd completed programs of geological mapping, geochemical sampling and four diamond drill holes, totalling 610.8 metres, on the area as the M.U.T. claims. During 1979 through 1981, BP Minerals completed programs of rock, silt and soil sampling; geological mapping; 53.0 line-kilometres of ground geophysical surveys and diamond drilling on the M.U.T. claims.
During 1994 through 1996, Sultan Minerals Inc. conducted programs of geochemical sampling, geological mapping and a 510 line-kilometre airborne geophysical survey on the area. In 2008 and 2009, Sultan Minerals Inc. completed a program of rock sampling, a 402.0 line-kilometre airborne geophysical survey and four diamond drill holes on the area.
