The first discovery of Permian metamorphic rocks in Zhoushan Islands, Zhejiang Province

JIANG Yang; XING Guangfu; YUANG Qiang; ZHAO Xilin; DUAN Zheng; DONG Xuefa

2016 Vol. 35, No. 7

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JIANG Yang, XING Guangfu, YUANG Qiang, ZHAO Xilin, DUAN Zheng, DONG Xuefa. The first discovery of Permian metamorphic rocks in Zhoushan Islands, Zhejiang Province[J]. Geological Bulletin of China, 2016, 35(7): 1046-1055.

Citation:

JIANG Yang, XING Guangfu, YUANG Qiang, ZHAO Xilin, DUAN Zheng, DONG Xuefa. The first discovery of Permian metamorphic rocks in Zhoushan Islands, Zhejiang Province[J]. Geological Bulletin of China, 2016, 35(7): 1046-1055.

The first discovery of Permian metamorphic rocks in Zhoushan Islands, Zhejiang Province

1. Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China;
2. Zhejiang Institute of Geological Survey, Hangzhou 311203, Zhejiang, China

Received Date: 09 December 2015

Revised Date: 31 May 2016

Publish Date: 15 July 2016

Abstract

Abstract

There are some metaphoric rocks such as amphibolite, genesis, schist and marble exposed in Daqu Island of Zhoushan Is-lands, Zhejiang Province. In the past, they are assigned to Chencai Formation. Nevertheless, new LA-ICP-MS zircon U-Pb analysis yielded the ages of metamorphic neogenic zircon and metamorphic rim in biotite-plagioclase gneiss ranging from 260Ma to 270Ma, whereas the metamorphic age of marble and the formation age of undeformed pegmatite veins which intruded into metamorphic rocks are 261.1±1.3Ma and 258.0±1.6Ma respectively, indicating that the metamorphic age of the rocks in Daqu Island is~260Ma. This is the first reported Permian metamorphic rock on the northeastern margin of South China Block, which may provide some im-portant new information for Dongwu movement in South China, global Hercynian movement and even the Pangaea reconstruction.
- metamorphic rocks /
- Permian /
- LA-ICP-MS zircon U-Pb age /
- Zhoushan Islands

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References

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