Porphyry deposits and oxidized magmas
WebJan 1, 2014 · Porphyry copper deposit is a typical product of the oxidized magmas, and the most discovered ores are strongly biased to Cenozoic age (Fig. 2 ). It is interesting to understand the oxidation status of granitic rocks throughout the earth history, particularly of older granitic terrains (early Earth) containing porphyry copper deposits. WebMar 8, 2024 · Porphyry systems, the most important reserves of Cu and Mo with significant Au, are genetically linked to the emplacement of hydrous and oxidized intermediate to acidic magmas, in response to temporal and geochemical evolution of crust in orogenic terranes.
Porphyry deposits and oxidized magmas
Did you know?
Webpotassic magmas characterized by varying oxidation states (fO 2), which contribute to different ore mineral assemblages and contrasting relationships to hydrothermal alteration zones. Gold-rich porphyry copper deposits are typically characterized by hydrous and highly oxidized causal magmas. Variations in the styles WebNov 16, 2024 · Porphyry deposits are characteristically enriched in Cu and/or Mo and/or Au, all of which are relatively rare and valuable metals. Consequently, even quite low-grade deposits can be economic, and porphyries are commonly referred to as large-tonnage, low-grade deposits. ... Fractional crystallization of hydrous, moderately oxidized arc magmas ...
WebApr 15, 2024 · Porphyry Cu deposits (PCDs) are presently the main source of Cu (~75%) and a substantial source of Au (~20%) around the world [].The ore bodies of PCDs … WebDec 1, 2014 · Guangzhou Institute of Geochemictry, CAS Abstract Essentially all porphyry deposits are closely associated with oxidized magmas at convergent margins. The best oxygen fugacities for...
WebMar 1, 2015 · Porphyry Cu- (Mo)- (Au) deposits are essentially magmatic-hydrothermal systems, which are generally initiated by injection of oxidized magmas saturated with … WebApr 13, 2024 · Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas …
WebThese oxidized melts transport metals and volatiles to magma chambers located in the mid to upper crust, where fractional crystallization and volatile exsolution result in porphyry ore formation. Porphyry deposits are typically classified on the basis of their economic metal endowment ( Kesler, 1973 ).
WebOct 1, 2002 · Porphyry deposits and oxidized magmas Ore Geology Reviews, Volume 65, Part 1, 2015, pp. 97-131 Show abstract Research article Oxygen fugacity and porphyry mineralization: A zircon perspective of Dexing porphyry Cu deposit, China Geochimica et Cosmochimica Acta, Volume 206, 2024, pp. 343-363 Show abstract Research article earn before tax 2023csvhelper count rowsWebApr 13, 2024 · Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas … earnbet casinoWebThe world’s largest current Cu resource is volcanic arc-hosted, porphyry copper deposits. Whether unusual parental magmas or fortuitous combinations of processes accompanying emplacement of common parental arc magmas (e.g., basalt) is required for ore deposit formation, remains unclear. Spatial and tectonic associations of adakite (andesite with … csvhelper column names with spacesWebJul 21, 2024 · In contrast to this paradigm of punctuated magmatic fertility, others note that even relatively Cu-poor magmas (i.e. <75 ppm Cu) contain sufficient Cu to allow the generation of large porphyry ... earn before tax ukWebNov 1, 2015 · The data of zircon Ce 4+ /Ce 3+ ratios and associated oxygen fugacity values in magma from ore-bearing intrusions indicate that more oxidized magmas are associated with the formation of larger porphyry Cu deposits. Such a conclusion may potentially be used in regional exploration for porphyry Cu deposits in the CAOB. earn before tax 2021WebApr 5, 2024 · Genesis of hydrous-oxidized parental magmas for porphyry Cu (Mo, Au) deposits in a postcollisional setting: examples from the Sanjiang region, SW China ... Magmatic sources of porphyry deposits in postcollisional settings remain controversial. We have used new and published petrological and geochemical data for the … earn beats item 🎧 dunking simulator codes