LA-ICP-MS zircons U-Pb ages and geological characteristics of EarlyMiddle Jurassic volcanic rocks in the Qingyuan area, Zhejiang Province

XING Xinlong; XING Guangfu; CHEN Shizhong; ZHAO Xilin; DUAN Zheng

2017 Vol. 36, No. 9

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XING Xinlong, XING Guangfu, CHEN Shizhong, ZHAO Xilin, DUAN Zheng. LA-ICP-MS zircons U-Pb ages and geological characteristics of EarlyMiddle Jurassic volcanic rocks in the Qingyuan area, Zhejiang Province[J]. Geological Bulletin of China, 2017, 36(9): 1583-1590.

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XING Xinlong, XING Guangfu, CHEN Shizhong, ZHAO Xilin, DUAN Zheng. LA-ICP-MS zircons U-Pb ages and geological characteristics of EarlyMiddle Jurassic volcanic rocks in the Qingyuan area, Zhejiang Province[J]. Geological Bulletin of China, 2017, 36(9): 1583-1590.

LA-ICP-MS zircons U-Pb ages and geological characteristics of EarlyMiddle Jurassic volcanic rocks in the Qingyuan area, Zhejiang Province

1.
Center of Exploration and Development of Geology and Mineral Resources of Jiangxi Province, Nanchang 330030, Jiangxi, China
2.
Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China

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Corresponding author: XING Guangfu, njxgfu@163.com

Received Date: 27 May 2016

Revised Date: 08 February 2017

Publish Date: 25 September 2017

Abstract

Abstract

The Early-Middle Jurassic volcanic rocks were discovered for the first time in Qingyuan area of southern Zhejiang Prov-ince, where the Cretaceous volcanism was intense. They consist of rhyodacite and rhyolitic ignimbrite and can be assigned to Ma-onong Formation. Their LA-ICP-MS zircon U-Pb ages are 176.5±0.7Ma and 169.1±3.3Ma respectively. Combined with Middle Jurassic volcanic rocks in northern Fujian Province, it is inferred that southeast coastal areas began to enter the paleo-Pacific plate sub-duction system in Early-Middle Jurassic.
- Early-Middle Jurassic /
- LA-ICP-MS zircon U-Pb dating /
- volcanic rock /
- Qingyuan area

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References

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