Porphyry deposits and oxidized magmas

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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 … 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 …

In Situ Mineralogical Constraints on Magmatic Process …

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 … 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. highest point in iran

Genesis of hydrous-oxidized parental magmas for porphyry Cu …

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 … 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 ). WebAug 14, 2024 · Oxidized calc-alkaline magmas control porphyry mineralization by influencing the speciation and solubility of sulfur [73,80], high f O 2 is more favorable for forming metal-rich magmas. Many researchers think that oxidized magmas can hold high metal content and are conducive to forming porphyry deposits [75,81]. how green was my valley cast 1975

Redox states and genesis of Cu- and Au-mineralized granite …

The geological characteristics, geochemical signature and …

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 … 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 + … how green was my valley film locationWebMar 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 … highest point in ireland

"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... " - Porphyry deposits and oxidized magmas

Porphyry deposits and oxidized magmas

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

WebPorphyry 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 … 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...

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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 …

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. 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.

WebThe 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 … 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 …

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. highest point in ireland in feetWebJun 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 … how green was my valley actorsWebJan 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. how green was my valley tvWebApr 13, 2024 · Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas … highest point in italy ks2WebRegional 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 ... highest point in jamaicaWebThe 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 … how green was my valley maureen o\u0027hara oscarWebApr 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 … highest point in java