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U–Pb, Re–Os and Ar–Ar dating of the Linghou polymetallic deposit, Southeastern China: Implications for metallogenesis of the Qingzhou–Hangzhou metallogenic belt
Yanwen Tang;  Yuling Xie;  Liang Liu;  Tingguan Lan;  Jianling Yang;  Meffre Sebastien;  Rongchao Yin;  Songsong Liang;  Limin Zhou
2017
发表期刊Journal of Asian Earth Sciences
卷号137页码:163-179
摘要

The QingzhouHangzhou metallogenic belt (QHMB) in Southeastern China has gained increasingly attention in recent years. However, due to the lack of reliable ages on intrusions and associated deposits in this belt, the tectonic setting and metallogenesis of the QHMB have not been well understood. The Linghou polymetallic deposit in northwestern Zhejiang Province is one of the typical deposits of the QHMB. According to the field relationships, this deposit consists of the early Cu–Au–Ag and the late Pb–Zn–Cu mineralization stages. Molybdenite samples with a mineral assemblage of molybdenite–chalcopyrite–pyrite ± quartz are collected from the copper mining tunnel near the Cu–Au–Ag ore bodies. Six molybdenite samples give the Re–Os model ages varying from 160.3 to 164.1 Ma and yield a mean age of 162.2 ± 1.4 Ma for the Cu–Au–Ag mineralization. Hydrothermal muscovite gives a well-defined Ar–Ar isochron age of 160.2 ± 1.1 Ma for the Pb–Zn–Cu mineralization. Three phases of granodioritic porphyry have been distinguished in this deposit, and LA–ICP–MS zircon U–Pb dating shows that they have formed at 158.8 ± 2.4 Ma, 158.3 ± 1.9 Ma and 160.6 ± 2.1 Ma, comparable to the obtained ages of the Cu–Au–Ag and Pb–Zn–Cu mineralization. Therefore, these intrusive rocks have a close temporal and spatial relationship with the Cu–Au–Ag and Pb–Zn–Cu ore bodies. The presences of skarn minerals (e.g., garnet) and vein-type ores, together with the previous fluid inclusion and H–O–C–S–Pb isotopic data, clearly indicate that the Cu–Au–Ag and Pb–Zn–Cu mineralization are genetically related to these granodiorite porphyries. This conclusion excludes the possibility that this deposit is of “SEDEX” type and formed in a sag basin of continental rifts setting as previously proposed. Instead, it is proposed that the Linghou polymetallic and other similar deposits in the QHMB, such as the 150–160 Ma Yongping porphyry-skarn Cu–Mo, Dongxiang porphyry? Cu, Shuikoushan/Kangjiawang skarn Pb–Zn, Fozichong skarn Pb–Zn and Dabaoshan porphyry-skarn deposits are of magmatic-hydrothermal origin and likely formed in a subduction-related setting. This work provides new insight that these intrusion-related deposits (e.g., porphyry and skarn types) of middle to late Jurassic age can be the most important targets for exploration in the QHMB.

关键词Qinzhou–hangzhou Metallogenic Belt (Qhmb) Zircon U–pb Dating Molybdenite Re–os Dating Hydrothermal Muscovite Ar–ar Dating Ore Genesis
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8393
专题矿床地球化学国家重点实验室
作者单位1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
3.Hangzhou Jiantong Group Co., Ltd, Jiande 311608, China
4.CODES ARC Centre of Excellence in Ore Deposits, University of Tasmania, Hobart, TAS 7001, Australia
5.National Center of Rock and Mineral Analysis, CAGS, Beijing 100037, China
推荐引用方式
GB/T 7714
Yanwen Tang;Yuling Xie;Liang Liu;Tingguan Lan;Jianling Yang;Meffre Sebastien;Rongchao Yin;Songsong Liang;Limin Zhou. U–Pb, Re–Os and Ar–Ar dating of the Linghou polymetallic deposit, Southeastern China: Implications for metallogenesis of the Qingzhou–Hangzhou metallogenic belt[J]. Journal of Asian Earth Sciences,2017,137:163-179.
APA Yanwen Tang;Yuling Xie;Liang Liu;Tingguan Lan;Jianling Yang;Meffre Sebastien;Rongchao Yin;Songsong Liang;Limin Zhou.(2017).U–Pb, Re–Os and Ar–Ar dating of the Linghou polymetallic deposit, Southeastern China: Implications for metallogenesis of the Qingzhou–Hangzhou metallogenic belt.Journal of Asian Earth Sciences,137,163-179.
MLA Yanwen Tang;Yuling Xie;Liang Liu;Tingguan Lan;Jianling Yang;Meffre Sebastien;Rongchao Yin;Songsong Liang;Limin Zhou."U–Pb, Re–Os and Ar–Ar dating of the Linghou polymetallic deposit, Southeastern China: Implications for metallogenesis of the Qingzhou–Hangzhou metallogenic belt".Journal of Asian Earth Sciences 137(2017):163-179.
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