Porphyry deposits and oxidized magmas
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...
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 …
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 …
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 ). 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.
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.
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 … shari leventhal sullcromWebMar 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. poppins typefaceWebPorphyry 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 … poppins typographieWebApr 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 … poppin sweatshirtWebMar 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 … shari levy westport ctWebpotassic 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 poppins webfontWebMar 1, 2015 · Porphyry Cu- (Mo)- (Au) deposits are essentially magmatic-hydrothermal systems, which are generally initiated by injection of oxidized magmas saturated with … poppins typography