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- W2367539735 abstract "Trace-element composition of zircons and whole rocks from ore-bearing porphyries from three porphyry copper deposits of the Gandese porphyry copper belt in Tibet has been analyzed by Laser ablation-inductively coupled plasma-mass spectrometry(LAICPMS).These data permit the Ce(Ⅳ)/Ce(Ⅲ) ratio within zircon to be calculated using a lattice-strain model for mineral-melt partitioning of Ce(Ⅳ) and Ce(Ⅲ).The Ce(Ⅳ)/Ce(Ⅲ) ratios of the Lakang'e deposit,Chongjiang deposit and Nanmu deposit are 492.25,263.83 and 291.94;the δEu values are 0.5341,0.4353 and 0.5273,respectively.We can draw a conclusion that the porphyry copper mineralization is directly associated only with porphyries with zircon Ce(Ⅳ)/Ce(Ⅲ)260 and δEu0.4.The decrease of Ce(Ⅳ)/Ce(Ⅲ) ratios in zircons from east to west in the Gangdese porphyry copper ore belt suggests that the magma in the east is more contaminated by upper crustal material than that in the west during ascending.Ce(Ⅳ)/Ce(Ⅲ) ratios in zircon can be used to discriminate ore-bearing porphyries from barren ones,which will provide a useful tool for search of porphyry copper deposits.At the end,the paper presents the mineralization mechanism of the Gangdese copper deposit belt." @default.
- W2367539735 created "2016-06-24" @default.
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- W2367539735 date "2008-01-01" @default.
- W2367539735 modified "2023-09-24" @default.
- W2367539735 title "RELATIVE OXIDATION STATES OF ORE-BEARING PORPHYRIES INFERRED FROM CE(IV)/CE(III) RATIO IN ZIRCON: APPLICATION TO THE PORPHYRY COPPER BELT AT GANGDESE,TIBET" @default.
- W2367539735 hasPublicationYear "2008" @default.
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