Recognition of Late Neoproterozoic bimodal volcanic rocks from the Yaolinghe Formation in the Suizao terrane of South Qinling massif and constraints on the continental rifting of the northern margin of Yangtze craton

WU Nianwen; JIANG Tuo; XU Qiong; ZHAO Xiaoming; ZHAO Long; QIU Xiaofei

2021 Vol. 40, No. 6

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WU Nianwen, JIANG Tuo, XU Qiong, ZHAO Xiaoming, ZHAO Long, QIU Xiaofei. Recognition of Late Neoproterozoic bimodal volcanic rocks from the Yaolinghe Formation in the Suizao terrane of South Qinling massif and constraints on the continental rifting of the northern margin of Yangtze craton[J]. Geological Bulletin of China, 2021, 40(6): 920-929.

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WU Nianwen, JIANG Tuo, XU Qiong, ZHAO Xiaoming, ZHAO Long, QIU Xiaofei. Recognition of Late Neoproterozoic bimodal volcanic rocks from the Yaolinghe Formation in the Suizao terrane of South Qinling massif and constraints on the continental rifting of the northern margin of Yangtze craton[J]. Geological Bulletin of China, 2021, 40(6): 920-929.

Recognition of Late Neoproterozoic bimodal volcanic rocks from the Yaolinghe Formation in the Suizao terrane of South Qinling massif and constraints on the continental rifting of the northern margin of Yangtze craton

1.
Research Center for Petrogenesis and Mineralization of Granitoid Rocks, China Geological Survey, Wuhan 430205, Hubei, China
2.
Central South China Innovation Center for Geosciences, Wuhan 430205, Hubei, China
3.
Institute of Geological Survey, China University of Geosciences, Wuhan 430074, Hubei, China
4.
The Testing Center of Shandong Bureau of China Metallurgical Geology Bureau, Jinan 250014, Shandong, China

More Information

Corresponding author: QIU Xiaofei, qiuxiaofei@mail.cgs.gov.cn

Received Date: 21 July 2020

Revised Date: 25 September 2020

Publish Date: 15 June 2021

Abstract

Abstract

Neoproterozoic tectonic evolution of the northern Yangtze craton is of great significance to the Precambrian geological evolution of South China.Zircon samples collected from the newly recognized bimodal meta-volcanic rocks of the Yaolinghe Formation in the Suizhou area were dated by LA-ICP-MS U-Pb method.Most zircons in the matabasalts are inherited zircons, their ages are consistent with those of detrital zircons from the underlying Wudang Formation in the region.Geochronological results also indicate that the muscovite-phyllites (felsic rocks) were formed at 623±3 Ma, representing the sedimentary age of the Yaolinghe Formation, synchronous with the 650-600 Ma intrusive sills in the Suizao terrane.Combined with the new geochronological data recording rifting-related magmatic-sedimentary rocks during the Late Neoproterozoic in the northern margin of the Yangtze craton, it can be advocated that the breakup of the Rodinia supercontinent in the northern part of the Yangtze craton might have been a long-lasting process.An oblique diachronous rifting model is further hypothesized for the breakup process.
- South Qingling Massif /
- Suizao terrane /
- Yaolinghe Formation /
- bimodal volcanic rocks /
- continental rifting

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