Biotite 40Ar/39Ar dating and chemical composition inform metallogenesis of Xiaoxi'nancha porphyry Au-Cu deposit, NE China

PengFei Shan,MingJian Cao,Fred Jourdan,Noreen J. Evans, Xin Ge,JingGui Sun,KeZhang Qin,Chao Zhao

Ore Geology Reviews（2021）

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摘要

•Zircon U-Pb dating of ore-bearing rocks show age of ~255 Ma.•Hydrothermal biotite 40Ar/39Ar age show ~110 Ma.•The same age (biotite and molybdenite) indicate coeval Au-Cu-Mo mineralization.•Halogen fugacity ratios imply a relatively Cl-rich hydrothermal system.

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关键词

Biotite chemical compositions,Biotite 40Ar/39Ar dating,Zircon U-Pb dating,Porphyry Au-Cu deposit,Xiaoxi'nancha,Yanbian area

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