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Ages of sediment-hosted Himalayan Pb-Zn-Cu-Ag polymetallic deposits in the Lanping basin, China: Re-Os geochronology of molybdenite and Sm-Nd dating of calcite
Zhang Jinrang; Wen Hanjie; Qiu Yuzhuo; Zhang Yuxu; Li Chao
通讯作者Wen Hanjie
2013
发表期刊Journal of Asian Earth Sciences
卷号73期号:5页码:284-295
摘要The Lanping basin is a significant Pb-Zn-Cu-Ag mineralization belt of the Sanjiang Tethyan metallogenic province in China. Over 100 thrust-controlled, sediment-hosted, Himalayan base metal deposits have been discovered in this basin, including the largest sandstone-hosted Pb-Zn deposit in the world (Jinding), and several Cu +/- Ag +/- Co deposits (Baiyangping, Baiyangchang and Jinman). These deposits, with total reserves of over 16.0 Mt Pb + Zn, 0.6 Mt Cu, and 7000 t Ag, are mainly hosted in Meso-Cenozoic mottled clastic rocks, and strictly controlled by two Cenozoic thrust systems developed in the western and eastern segments of the Lanping basin. To define the metallogenic history of the study area, we dated nine calcite samples associated with copper sulfides from the Jinman Cu deposit by the Sm-Nd method and five molybdenite samples from the Liancheng Cu-Mo deposit by the Re-Os method. The calcite Sm-Nd age for the Jinman deposit (58 +/- 5 Ma) and the molybdenite Re-Os age for the Liancheng deposit (48 2 Ma), together with previously published chronological data, demonstrate (1) the Cu-Ag mineralization in the western Lanping basin mainly occurred in three episodes (i.e., similar to 56-54, 51-48, and 31-29 Ma), corresponding to the main- and late-collisional stages of the Indo-Asian orogeny; and (2) the Pb-Zn-Ag (+/- Cu) mineralization in the eastern Lanping basin lacked precise and direct dating, however, the apatite fission track ages of several representative deposits (21 +/- 4 Ma to 32 +/- 5 Ma) may offer some constraints on the mineralization age.
关键词Mineralization Epoch Calcite Sm–nd Age Molybdenite Re–os Dating Sediment-hosted Pb–zn–cu–ag Deposits Lanping Basin China
学科领域矿床地球化学
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/352002/5028
专题矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
通讯作者Wen Hanjie
推荐引用方式
GB/T 7714
Zhang Jinrang,Wen Hanjie,Qiu Yuzhuo,et al. Ages of sediment-hosted Himalayan Pb-Zn-Cu-Ag polymetallic deposits in the Lanping basin, China: Re-Os geochronology of molybdenite and Sm-Nd dating of calcite[J]. Journal of Asian Earth Sciences,2013,73(5):284-295.
APA Zhang Jinrang,Wen Hanjie,Qiu Yuzhuo,Zhang Yuxu,&Li Chao.(2013).Ages of sediment-hosted Himalayan Pb-Zn-Cu-Ag polymetallic deposits in the Lanping basin, China: Re-Os geochronology of molybdenite and Sm-Nd dating of calcite.Journal of Asian Earth Sciences,73(5),284-295.
MLA Zhang Jinrang,et al."Ages of sediment-hosted Himalayan Pb-Zn-Cu-Ag polymetallic deposits in the Lanping basin, China: Re-Os geochronology of molybdenite and Sm-Nd dating of calcite".Journal of Asian Earth Sciences 73.5(2013):284-295.
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