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. WebNov 1, 2015 · The data of zircon Ce4+/Ce3+ratios and associated oxygen fugacity values in magma from ore-bearing intrusions indicate that more oxidized magmas are associated …
Porphyry deposits and oxidized magmas
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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... WebApr 12, 2024 · The Kighal porphyry Cu deposit, in the Arasbaran magmatic belt (AMB), is hosted by Late Eocene to Oligocene volcanic rocks and Miocene high–K calc–alkaline …
WebNov 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. WebDec 1, 2014 · Essentially all porphyry deposits are closely associated with oxidized magmas at convergent margins. The best oxygen fugacities for porphyry mineralization is ΔFMQ …
WebNov 5, 2016 · Therefore, porphyry Cu deposits are usually oxidized (with oxygen fugacities > ΔFMQ +2) (Mungall 2002; Sun et al. 2015). The problem is that while most of the magmas at convergent margins... WebMar 23, 2024 · Arc volcanics are more oxidized than mid-ocean ridge basalts (MORB), but it is debated whether this is a mantle feature or a result of magmatic evolution. Copper, a sulfur-loving element, has been used to trace the behavior of redox-sensitive sulfur during mantle melting and infer similar redox states of sub-arc and sub-ridge mantle.
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 …
WebEastern Tianshan hosts a number of porphyry Cu deposits. However, these mainly formed in the Jueluotage Belt, in the middle part of Eastern Tianshan. The Tonggou porphyry Cu … birmingham social services special measuresWebMar 1, 2015 · Porphyry deposits and oxidized magmas Brief introduction of major oxygen buffers. Oxygen fugacity ( f O 2) is an important geological parameter affecting the... The … birmingham social services needs assessmentWebPorphyry deposits are the world’s leading source of copper and molybdenum. This deposit type also contains a great abundance of gold and silver. Gold-rich porphyry deposits … dangerous wildlife in indianaWebApr 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 predominantly occur at shallow crustal level around dike-like porphyries, e.g., [2,3].It is well known that PCDs are usually associated with oxidized and volatile-rich magmas within shallow … dangerous wind chillsWebJun 1, 1998 · We predict that the characteristic zonation to sulfur-poor rims of apatite in the Yerington batholith is common in other oxidized, hydrous, calc-alkaline magmas, and can … dangerous windows commandsWebThese 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 ). birmingham social services translatorsWebMar 1, 2015 · Linkage between oxidized magmas and porphyry deposits 3.2.1. Sulfur oxidation, sulfide under saturation and residual sulfide. Copper, Au and Mo are all chalcophile elements,... 3.2.2. Sulfate reduction. At oxygen fugacities higher than ΔFMQ + … dangerous within temptation lyrics