Hydrothermal Mineral Deposits: Principles and Fundamental Concepts for the Exploration Geologist |
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Africa albite alkaline Archean argillic alteration assemblages associated basaltic base metal basin biotite breccia brines calcite carbonate carbonatite cassiterite chalcopyrite characterised chlorite complexes continental craton crustal Damara orogen disseminated dolomite dykes Econ Geol emplacement epithermal epithermal systems evolution facies faults feldspar fluid inclusions fluorite formation formed fractures geochemical geochemistry Geol Soc Geology geothermal systems greenstone belts greisen greisenised hematite hydrothermal hydrothermal alteration hydrothermal fluids hydrothermal solutions hydrothermal systems igneous intrusion isotope K-feldspar kaolinite kuroko lithosphere mafic magmatic magnetite mantle margin massive sulphide deposits melt metallogeny metamorphic metasomatism mineralisation Namibia occur oceanic crust ophiolite orebodies orogen oxides pegmatites phase phyllic Pirajno plate plate tectonics plutonic porphyry systems potassic Precambrian precipitation propylitic Proterozoic pyrite quartz region result rhyolitic sedimentary sediments sequence sericite silicate skarns South sphalerite stage stockworks stratiform structures subduction tectonic temperature terranes tonnes tourmaline veins volcanic wall rocks zone