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

作　　者：杨浩 张素新 江海水 王永标 

机构地区：[1]Graduate School , China University of Geosciences , Wuhan430074, China,Faculty of Earth Sciences , China University of Geosciences , Wuhan430074, China [2]State Key Laboratory of Geological Processes and Mineral Resources ,China University of Geosciences , Wuhan430074, China [3]Faculty of Earth Sciences , China University of Geosciences , Wuhan430074, China, State Key Laboratory of Geological Processes and Mineral Resources , China University of Geosciences , Wuhan430074, China

出　　处：《Journal of China University of Geosciences》2006年第2期121-125,131,共6页中国地质大学学报（英文版）

基　　金：This paper is supported by the National Natural Science Foundation ofChina ( Nos .40232025 ,40572002);the National Science Fund forDistinguished Young Scholars (No .40325004) .

摘　　要：The calimicrobialites of Chongyang （崇阳）, Hubei （湖北） Province, occur above the mass extinction line in the Late Permian reef facies. Below the boundary are the sponge reef limestone, crinoid limestone and algae-foraminifer bioclastic limestone of the Changxing （长兴） Formation. The calimicrobialites are generally composed of mid-coarse grains and microlite calcite with a structure of ＂graniphylc fabric＂ and stromatolite. The fossils discovered in the calimicrobialites include globular cyanobacteria, ostracods, micro-gastropods, bivalves, fish teeth and some micro-problematical fossils. Conodont fossils of Hindeodus parvus, H. typicalis and H. latidentatus were also found in the calimicrobialites. According to the conodonts, the calimicrobialites spanned the latest Permian and earliest Triassic in the Chongyang Section. The upper part above the first occurrence of Hindeodus parvus should be attributed to the earliest Triassic, and the lower part to the Changhsingian. The sedimentary structure, fossil composition and conodont zonation of the Chongyang calimicrobialites can be well correlated with the calimicrobialites found in other areas of South China.The calimicrobialites of Chongyang （崇阳）, Hubei （湖北） Province, occur above the mass extinction line in the Late Permian reef facies. Below the boundary are the sponge reef limestone, crinoid limestone and algae-foraminifer bioclastic limestone of the Changxing （长兴） Formation. The calimicrobialites are generally composed of mid-coarse grains and microlite calcite with a structure of ＂graniphylc fabric＂ and stromatolite. The fossils discovered in the calimicrobialites include globular cyanobacteria, ostracods, micro-gastropods, bivalves, fish teeth and some micro-problematical fossils. Conodont fossils of Hindeodus parvus, H. typicalis and H. latidentatus were also found in the calimicrobialites. According to the conodonts, the calimicrobialites spanned the latest Permian and earliest Triassic in the Chongyang Section. The upper part above the first occurrence of Hindeodus parvus should be attributed to the earliest Triassic, and the lower part to the Changhsingian. The sedimentary structure, fossil composition and conodont zonation of the Chongyang calimicrobialites can be well correlated with the calimicrobialites found in other areas of South China.

关 键 词：calimicrobialite CONODONT END-PERMIAN Early Triassic Hubei. 

分 类 号：P534.51[天文地球—古生物学与地层学]