Zircon U-Pb age of bertonite of Upper Ordovician Wufeng Formation in Southeast Yangtze platform and its geological significance

YE Fei; PAN Wen; ZUO Yong; YIN Tinglong; JIANG Tianrui; YANG Shengtang; YANG Guanglong; ZHOU Ling; LIU Jian; ZHAN Pengcai; ZHOU Ning; QIN Zhigui

2019 Vol. 38, No. 10

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YE Fei, PAN Wen, ZUO Yong, YIN Tinglong, JIANG Tianrui, YANG Shengtang, YANG Guanglong, ZHOU Ling, LIU Jian, ZHAN Pengcai, ZHOU Ning, QIN Zhigui. Zircon U-Pb age of bertonite of Upper Ordovician Wufeng Formation in Southeast Yangtze platform and its geological significance[J]. Geological Bulletin of China, 2019, 38(10): 1718-1725.

Citation:

YE Fei, PAN Wen, ZUO Yong, YIN Tinglong, JIANG Tianrui, YANG Shengtang, YANG Guanglong, ZHOU Ling, LIU Jian, ZHAN Pengcai, ZHOU Ning, QIN Zhigui. Zircon U-Pb age of bertonite of Upper Ordovician Wufeng Formation in Southeast Yangtze platform and its geological significance[J]. Geological Bulletin of China, 2019, 38(10): 1718-1725.

Zircon U-Pb age of bertonite of Upper Ordovician Wufeng Formation in Southeast Yangtze platform and its geological significance

1.
Geological Party 103 Guizhou Bureau of Geologoy and Minerals, Tongren 554300, Guizhou, China
2.
China University of Geosciences, Wuhan 430074, Hubei, China
3.
Geological Party 106 Guizhou bureau of Geologoy and Minerals, Zunyi 563000, Guizhou, China

More Information

Corresponding author: PAN Wen, 345704348@qq.com

Received Date: 10 January 2019

Revised Date: 10 May 2019

Publish Date: 15 October 2019

Abstract

Abstract

A layer of bentonite is usually developed in upper Ordovician and lower Silurian strata of southeast Yangtze platform in Sinan area. Sampling was done in Wufeng Formation of upper Ordovician and Longmaxi Formation of lower Silurian in Luowantuo of Sinan, high precision U-Pb dating was conducted and as a result, the stratigraphic sedimentary age of Wufeng Formation and Longmaxi Formation in this area were constrained. The data obtained provide reliable evidence for volcanic eruption and stratigraphic chronology near Ordovician and Silurian boundary of southeast Yangtze platform in Sinan area. The age data are correlated well with the data obtained in Dabashan of northwest China, which is a little later than the age of Ordovician bentonite in southeast of the North China Craton (449.0~465.8Ma). The volcanic activity was probably related to the subduction of Cathaysian plate to Yangtze plate. During Middle-Late Ordovician and late Early Silurian, many volcanic eruptions influenced the chemical condition and ecological environment of the ocean in that period and caused the extinction and glacier initiation since middle-late Ordovician.
- Southeast Yangtze platform /
- bentonite /
- zircon U-Pb age /
- volcanic eruption /
- extinction

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References

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