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- W2354248813 abstract "The Dexing porphyry copper deposit in Jiangxi Province is the largest porphyry copper deposit in southeastern China. Considerable studies have been done on ore bearing granodiorite porphyries, ore forming source and ore forming fluids and etc. However, little concern was given over quartz diorite porphyrites occurring as veins in the copper deposit. This study carried out the SHRIMP U-Pb geochronologic analyses for zircons from the diorite porphyrite veins in the Tongchang mine deposit, yielding a good concordant 206Pb/238U weighted mean age of 153.5±2.4 Ma (2σ, MSWD=2.5). The result shows that the magmatism occurred in the late Jurassic, land formed likely in a back-arc or intra-arc extension environment triggered by the subduction of palaeo-Pacific plate. Hf and Nd isotopic analysis produced high eNd(t) (～0.5) and eHf(t) values (～4.73), indicating that these intrusions have a crust-mantle mixing source. Thus, the Dexing area had not only gone though a continental arc setting in the early period (170～171 Ma), but also gone though an back arc extension setting in the late period (～153.5 Ma), forming the ore-bearing granitic intrusions and ore-barren dioritic intrusions, respectively." @default.
- W2354248813 created "2016-06-24" @default.
- W2354248813 creator A5002500632 @default.
- W2354248813 date "2012-01-01" @default.
- W2354248813 modified "2023-09-23" @default.
- W2354248813 title "SHRIMP Zircon U-Pb Dating and Hf Isotope Studies of the Diorite Porphyrite from the Dexing Copper Deposit" @default.
- W2354248813 hasPublicationYear "2012" @default.
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