Mineral resources . of the tin deposits of New England (in NewSouth Wales) to the acid granites, and their derivatives, such as the pegma-tites, aplites, and quartz veins. Other instances are the relations of theHillgrove gold, antimony, and scheelite deposits to the diorites, basicgranites and lamprophyric dykes of the field. In the case of the Canbelego ore deposits, however, this dependence oflode material upon igneous intrusions is not at all evident. It is true thata long line of quartz and felspar-porphyry, rhyolite, and tuffs occur a littleto the east of Canbelego, but, in the first pla
Mineral resources . of the tin deposits of New England (in NewSouth Wales) to the acid granites, and their derivatives, such as the pegma-tites, aplites, and quartz veins. Other instances are the relations of theHillgrove gold, antimony, and scheelite deposits to the diorites, basicgranites and lamprophyric dykes of the field. In the case of the Canbelego ore deposits, however, this dependence oflode material upon igneous intrusions is not at all evident. It is true thata long line of quartz and felspar-porphyry, rhyolite, and tuffs occur a littleto the east of Canbelego, but, in the first place, such occurrence appears torepresent flows of lava; in the second place, lodes which lie near its junctionwith the slates also traverse the porphyry indifferently with the slates, andhave affected it as much as they have the slates; in the third place, suchextremely siliceous types of igneous rocks as the Canbelego porphyries arenot associated, usually, with copper and gold deposits in New South Wales. Plate Mount Boppy Lode, Eastern Limb, No. 6 Level, showing association of quartz veins and silicified country.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
