Direct and indirect associations between potassic igneous rocks, shoshonites and gold-copper deposits
作者： Daniel Müller , David I. Groves
DOI: 10.1016/0169-1368(93)90035-W
关键词: Igneous rock 、 Phenocryst 、 Geochemistry 、 Mesothermal 、 Mesozoic 、 Geology 、 Lile 、 Petrology 、 Pleistocene 、 Cenozoic 、 Ordovician
摘要: Abstract Many epithermal to mesothermal and porphyry-style Au ± Cu deposits worldwide occur associated with, or are hosted by, potassic igneous rocks shoshonites. The host generally characterized by high halogens such as Cl F, LILE low HFSE. Mineralization genetically with rock suites appears be restricted three tectonic settings: late oceanic arcs, continental arcs postcollisional arcs. Examples of associations in include the Pleistocene Ladolam gold deposit, Lihir island, Papua New Guinea, Pliocene Emperor mine, Viti Levu, Fiji Ordovician Goonumbla porphyry cooper-gold N.S.W., Australia. from many copper-gold Mesozoic Cenozoic Chilean Andes. An example association a postcollisional-arc is Miocene Porgera Guinea. For those interpreted related gold-copper contents their mica phenocrysts anomalously respect barren high-K same settings. Mineralized appear typified both F phenocrysts.
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