Porphyry deposits and oxidized magmas

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August undefined, 2024

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. WebJul 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 ...

Oxidation Condition and Metal Fertility of Granitic Magmas: Zircon ...

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 ... 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 the palatee leasing office

Gold in porphyry copper deposits: its abundance and fate

WebOct 19, 2024 · Magmatic amphibole phenocryst compositions indicate that the parental magmas are all relatively oxidized (ΔFMQ = 1.7 ± 0.6), and H 2 O-rich (3.8 ± 0.3 wt% H 2 O). These results are consistent with those estimated from zircon compositions (ΔFMQ = 1.8 ± 0.8) and high whole-rock Sr/Y ratios (75 ± 31), respectively. 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. 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... the palate dining room edom tx

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Porphyry copper deposit formation in arcs: What are the odds?

WebJul 6, 2024 · Porphyry deposits are large, low-grade metal ore bodies that are formed from hydrothermal fluids derived from an underlying magma reservoir. They are important as … 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 ). the palate foxboro wiWebRegional geology The formation of porphyry Cu ± Mo ± Au deposits depend criti- The newly discovered Dalli porphyry Cu–Au deposit is placed in cally on the shallow (10–5 km depth) emplacement of the central part of Urumieh–Dokhtar magmatic belt, which subduction-related magmas, where high-temperature (300– extends over a strike length ... the palate kauai

"WebMar 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 + … " - Porphyry deposits and oxidized magmas

Porphyry deposits and oxidized magmas

Oxidized primary arc magmas: Constraints from Cu/Zr …

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 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.

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WebThe 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 … 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 …

WebApr 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 … 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 …

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 … WebMar 1, 2015 · Porphyry Cu- (Mo)- (Au) deposits are essentially magmatic-hydrothermal systems, which are generally initiated by injection of oxidized magmas saturated with …

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.

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 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 … shutter hold back ukWebEastern 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 … the palate kitchenWebApr 13, 2024 · Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas … shutter holder hardwareWebApr 13, 2024 · Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas … shutter hollywood movie downloadWebJan 29, 2024 · Some porphyry systems contain abundant pyrrhotite and (or) arsenopyrite in the mineral assemblages. Systems that exhibit bornite-bearing assemblages containing abundant molybdenite are commonly arsenic- and gold-poor and tend to be associated with more oxidized arc magmas. shutter holiday cardsWebMar 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 … the palate is located in which body cavityWebThe infertile suites are relatively reduced S- and A-type and relatively dry A- and I-type magmas. The fertile suites are more oxidized and hydrous, and … shutter home depot