湖北崇阳二叠纪—三叠纪之交钙质微生物岩的时代及基本特征

杨浩; 张素新; 江海水; 王永标

Volume 31 Issue 2

Mar. 2006

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Article Navigation > Earth Science > 2006 > 31(2): 165-170

YANG Hao, ZHANG Su-xin, JIANG Hai-shui, WANG Yong-biao, 2006. Age and General Characteristics of Calcimicrobialite near the Permian-Triassic Boundary in Chongyang, Hubei Province. Earth Science, 31(2): 165-170.

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Age and General Characteristics of Calcimicrobialite near the Permian-Triassic Boundary in Chongyang, Hubei Province

YANG Hao^{1, 2
,},
ZHANG Su-xin³,
JIANG Hai-shui^{1, 2},
WANG Yong-biao^{2, 3}

1.
Graduate School, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Science, China University of Geosciences, Wuhan 430074, China
3.
State Key Laboratory of Geologicai Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2005-07-19
Publish Date: 2006-03-25

Abstract

Abstract

The microbialites of Chongyang in Hubei Province occur above the mass extinction line in the Late Permian reef facies. Below the boundary are the sponge reef limestone, crinoid limestone and alga-foraminifer bioclastic limestone of the Changxing Formation. The microbialites are generally composed of mid-coarse grains and microlite calcite with a structure of "graniphyic fabric" and stromatolite. The fossils discovered in the microbialites include globular cynobacteria, ostracods, micro-gastropods, bivalves, fish teeth and some problematical micro-fossils. Conodont fossils of Hindeodus parvus, H. typicalis and H. latidentatus were also found. According to the conodonts, microbialites spanned the Late Permian and Early Triassic in Chongyang. The upper part above the first occurrence of Hindeodus parvus should be attributed to the Early Triassic, and the low part to Changxingian. The sedimentary structure, fossil composition and conodont zonation of the Chongyang microbialites can be well correlated with the microbialites found in other areas of South China.
- calcimicrobialite,
- conodont,
- end-Permian,
- Early Triassic,
- Hubei

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References(21)

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