SHRIMP U-Pb zircon dating of tuff in the Shuangqiaoshan and Heshangzhen groups in South China—constraints on the evolution of the Jiangnan Neoproterozoic orogenic belt

GAO Lin-zhi; YANG Ming-gui; DING Xiao-zhong; LIU Yan-xue; LIU Xun; LING Lian-hai; ZHANG Chuan-heng

doi:10.12097/gbc.20081017

Geological Bulletin of China > 2008 > 27(10): 1744-1751. > DOI: 10.12097/gbc.20081017

GAO Lin-zhi, YANG Ming-gui, DING Xiao-zhong, LIU Yan-xue, LIU Xun, LING Lian-hai, ZHANG Chuan-heng. 2008: SHRIMP U-Pb zircon dating of tuff in the Shuangqiaoshan and Heshangzhen groups in South China—constraints on the evolution of the Jiangnan Neoproterozoic orogenic belt. Geological Bulletin of China, 27(10): 1744-1751. DOI: 10.12097/gbc.20081017

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SHRIMP U-Pb zircon dating of tuff in the Shuangqiaoshan and Heshangzhen groups in South China—constraints on the evolution of the Jiangnan Neoproterozoic orogenic belt

Institute of Geology, Chinese Academy of Geological Sciences,2 Jiangxi Bureau of Geology and Mineral Exploration and Development, 3 Jiangxi Institute of Geological Survey, 4 China University of Geosciences (Beijing)

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A large number of zircons were obtained from three samples of bentonite in the Hengyong and Anleling formations of the Shuanqishan Group and Heshangzhen Group. They yielded weighted mean 206Pb/238U ages of 831 ± 5 Ma for the Hengyong Formation, 829 ± 5 Ma for the Anleling Formation and 767 ± 5 Ma for the Shangshu Formation of the Heshangzhen Group by the sensitive high-resolution ion microprobe at the SHRIMP center, Curtin University, Western Australia. These ages show that the widespread Shuangqiaoshan and Heshangzhen groups should be assigned to the Neoproterozoic and provide accurate chronostratigraphic evidence for the determination of the location of the Shuanqishan Group in the stratigraphic column.
- South China,
- Shuangqiaoshan Group,
- zircon SHRIMP U-Pb dating,
- Neoproterozoic

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SHRIMP U-Pb zircon dating of tuff in the Shuangqiaoshan and Heshangzhen groups in South China—constraints on the evolution of the Jiangnan Neoproterozoic orogenic belt

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