. Factory and industrial management. etalliferous mine, either on VancouverIsland or the coast of the mainland, has been reached on the CopperQueen on Texada, where the working shaft is 515 feet deep. Borniteore was found to predominate even at that depth, where the ore bodywas about 130 feet in length with a thickness of 4 feet on the foot wall,and a maximum of 12 feet on the hanging wall, wath 13 feet of barrenfelsite. or possibly altered limestone, lying betw^een the two bodies ofore. The ore bodies in the productive mines occur either in the lime-stone or felsite (as it is locally termed),
. Factory and industrial management. etalliferous mine, either on VancouverIsland or the coast of the mainland, has been reached on the CopperQueen on Texada, where the working shaft is 515 feet deep. Borniteore was found to predominate even at that depth, where the ore bodywas about 130 feet in length with a thickness of 4 feet on the foot wall,and a maximum of 12 feet on the hanging wall, wath 13 feet of barrenfelsite. or possibly altered limestone, lying betw^een the two bodies ofore. The ore bodies in the productive mines occur either in the lime-stone or felsite (as it is locally termed), or at the contact betw^een theserocks: or else, but much more rarely, at the contact between limestoneand diabase. The rock termed felsite, if subjected to an expert exam-ination will possibly be found to be an altered impure limestone; itcontains calcite. garnets, alumina, and silica, but may be a felsite ofigneous origin and occur as intrusions in the limestone which hasbeen thoroughly metamorphosed. 846 THE ENGINEERING GOLD DREDGE UNDER CONSTRUCTION NEAR LYTTON ON THE ERASER RIVER. The centre of this island is made up ahnost entirely of igneousrocks, many of which have a porphyritic structure, and these are oftenfissured. The veins so formed are filled with auriferous cjuartz, free-milling at and near the surface, but refractory and apparently in manycases losing their values at shallow depths. Consequently none of thisclass of ore bodies on Texada Island has as yet developed into perma-nent paying mines. Near the northwestern coast of the island the crystalline lime-stone again occurs in vast bodies, and in contact with basic igneousrocks. The mineral resources of this portion are magnetite and lime-stone, the latter being burned and the product shipped chiefly toHawaii as well as local markets, while the former is mined and atpresent shipped to the iron furnace at Irondale in the State of Wash-nigton, where it is manufactured into pig iron of a superior quality
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