浙江龙游地区基性及镁质变质岩的地球化学特征及其构造环境

董学发; 唐增才; 陈忠大; 余盛强; 赵旭东; 周宗尧; 吴小勇; 肖庆辉

doi:10.3799/dqkx.2016.517

Volume 41 Issue 8

Aug. 2016

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Article Navigation > Earth Science > 2016 > 41(8): 1322-1333

Dong Xuefa, Tang Zengcai, Chen Zhongda, Yu Shengqiang, Zhao Xudong, Zhou Zongyao, Wu Xiaoyong, Xiao Qinghui, 2016. Geochemical Characteristics of the Basic and Magnesian Metamorphic Rocks in Longyou Area, Zhejiang Province and Their Tectonic Setting. Earth Science, 41(8): 1322-1333. doi: 10.3799/dqkx.2016.517

Citation:

Dong Xuefa, Tang Zengcai, Chen Zhongda, Yu Shengqiang, Zhao Xudong, Zhou Zongyao, Wu Xiaoyong, Xiao Qinghui, 2016. Geochemical Characteristics of the Basic and Magnesian Metamorphic Rocks in Longyou Area, Zhejiang Province and Their Tectonic Setting. Earth Science, 41(8): 1322-1333. doi: 10.3799/dqkx.2016.517

Citation:

Dong Xuefa, Tang Zengcai, Chen Zhongda, Yu Shengqiang, Zhao Xudong, Zhou Zongyao, Wu Xiaoyong, Xiao Qinghui, 2016. Geochemical Characteristics of the Basic and Magnesian Metamorphic Rocks in Longyou Area, Zhejiang Province and Their Tectonic Setting. Earth Science, 41(8): 1322-1333. doi: 10.3799/dqkx.2016.517

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Geochemical Characteristics of the Basic and Magnesian Metamorphic Rocks in Longyou Area, Zhejiang Province and Their Tectonic Setting

doi: 10.3799/dqkx.2016.517

1.
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
2.
Zhejiang Institute of Geological Survey, Hangzhou 311203, China
3.
Development and Research Center of China Geological Survey, Beijing 100037, China

Received Date: 2016-02-20
Publish Date: 2016-08-15

Abstract

Abstract

A medium and high grade metamorphic rock series is exposed in Longyou area located in the southeast margin of Yangtze block and Cathaysia block, which is important for the interpretation of South China Predevonian tectonic pattern. But the tectonic setting of its formation remains unknown presently. It is found out these rocks can be divided into three types: "N-MORB", "T-MORB" and "E-MORB" type rock by a basic and magnesian metamorphic rock geochemical study in this paper The protoliths of the "N-MORB" is mainly formed in the intra-oceanic arc, the "T-MORB" is mainly formed in the transition of mid-oceanic ridge and the volcanic arc, and the "E-MORB" type rock is formed in the enrichment of mid-oceanic ridge, epicontinental arc and intraplate environment. Rock diagenesis environment diversity shows that the metamorphic rock of Longyou area is a tectonic mélange and its forming process is related with the ancient oceanic crust subduction, which also provides a reasonable explanation for the output, positioning of the pomegranate amphibolite in Longyou area.
- basic metamorphic rocks,
- magnesia metamorphic rocks,
- geochemistry,
- tectonic setting,
- Longyou,
- Zhejiang Province

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References(63)

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