Earth Science Frontiers ›› 2020, Vol. 27 ›› Issue (6): 213-233.DOI: 10.13745/j.esf.sf.2020.6.18

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Carboniferous foraminifers from the Shangsi area in southern Guizhou and the Visean foraminiferal succession in South China

SHEN Yang1,2(), WANG Xunlian3, LI Yukun4, YANG Zhihua3, CEN Wuxuan3, WANG Xuebing3   

  1. 1. Museum of China University of Geosciences (Beijing), Beijing 100083, China
    2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China
    3. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
    4. Guangxi Institute of Geological Survey, Nanning 530023, China
  • Received:2020-03-24 Revised:2020-05-26 Online:2020-11-02 Published:2020-11-02

Abstract:

Abundant and highly diversified foraminifers were widely distributed in the Carboniferous period with high evolutionary rate, which is of great significance to the stratigraphic division and correlation. Compared with some important Carboniferous sedimentary regions in the world, the accuracy of the foraminiferal biostratigraphic division in South China is relatively low. We report in this paper on the abundant foraminifers from the Jiusi Formation and from the lower part of the Shangsi Formation, both are token as the representative lithostratigraphic units of the Carboniferous system in South China. Based on the existing data of foraminifers, seven foraminiferal zones are recognized in the Visean stage of South China. In ascending order, they are the Eoparastaffella simplex, Viseidiscus/Planoarchaediscus, Paraarchaediscus Zone, Pojarkovella nibelis, Koskinotextularia, Bradyina, and Janischewskina Zones. These foraminiferal zones can be well correlated with other typical Carboniferous sedimentary regions in the world, thus providing a high-resolution stratigraphic framework for related studies. Based on the study of foraminifers from the Shangsi area, we propose that the first appearance of foraminifer Bradyina can be used as a biostratigraphic criterion to define the base of the Shangsian Stage, a regional chronostratigraphic unit of the Carboniferous system in China. Moreover, the Shangsian Stage can be correlated to the middle and upper parts of the Warnantian Substage in Western Europe or to the Aleksinian-Venevian Substage in Russia. Altogether it provides reliable fossil evidence for the regional chronostratigraphic unit correlation of the Carboniferous system worldwide.

Key words: foraminifer, biostratigraphy, Shangsian, Visean, Carboniferous, South China

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