The ST 12 occurrence is situated in the Swannell Ranges (Omineca Mountains), approximately 15 kilometres east-northeast of Old Hogem and 35 kilometres west-northwest of Germansen Landing.

The area is underlain by Upper Triassic Plughat Formation (Takla Group) volcanics that have been intruded to the west by mesozonal plutonic rocks assigned to the Late Triassic to Early Cretaceous Hogem Intrusive Complex, which form an elongate batholith extending from Chuchi Lake north to the Mesilinka River. A small syenite outlier also intrudes the volcanic rocks to the south.

The ST 12 showing is described as pyrite and minor chalcopyrite associated with epidote stringers in strongly pyritized pyroxene porphyritic basalt. Minor sulphides also occur as disseminations.

The Hogem Intrusive Complex intrudes the Takla volcanics 3 kilometres northwest of the showing. In this area it is composed mainly of monzonite, monzodiorite and syenite and is probably Jurassic. A smaller syenite-dominated body occurs 1.5 kilometres south of the showing and is likely a satellite of the main Hogem Complex.

Work History

In 1971 James Todd and Associates completed a line cutting, mapping and soil sampling program on the ST claim group. The soil survey located no anomalous copper zones.

In 1973, Manex Mining Ltd. conducted an induced polarization and magnetometer survey within the ST, DC, and ME claim groups over nine approximately 1.6-kilometre lines that defined a large east-trending anomaly parallel to the syenitic intrusive contact. A total of 10 silt samples and 758 soil samples were collected and assayed for molybdenum and copper.

In 1990, Manson Creek Resources conducted a geological mapping and prospecting program supplemented by geochemical analysis of 235 stream sediment samples and 47 rock samples within the nearby Discovery Creek property.

In 1991, Manson Creek Resources conducted an exploration program consisting of 84 soil samples and 3 drillholes, totalling 424.3 metres, within the Discovery Creek property.