BLUE LIGHT prospect. Extract from MINFILE No 104O 005:
The main showing of the Blue Light prospect, in northwest British Columbia occurs in the Mississippian-Pennsylvanian metasedimentary Oblique Creek Formation in an embayment on the west side of the Cassiar Batholith. Scheelite occurs as disseminations and coarse aggregates in quartz-amphibole and diopside-garnet skarn lenses up to 1.5 metres thick within a 15 metre wide sheeted zone of augen gneiss and pelitic hornfels. Late pegmatite dykes crosscut the metasediments and intrusive phases. The mineralization is associated with an Eocene granitic intrusion (Nelson et al, Fieldwork 1987). The dykes contain fluorite, fluorapatite and minor beryl. The zone of discontinuous tungsten mineralization is exposed for a length of 30 metres. South of this, magnetite-quartz-pyrite lenses up to 3 metres thick occur in a quartzitic hornfels, roughly parallel to bedding. These contain up to 0.89 per cent tin.
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