Conodont Biostratigraphy and Evolution across Permian-Triassic Boundary at Yangou Section,Leping,Jiangxi Province,South China  

作　　者：孙冬英 童金南 熊炎林 田力 殷鸿福 

机构地区：[1]State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences [2]Tourism College of Jiujiang University

出　　处：《Journal of Earth Science》2012年第3期311-325,共15页地球科学学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.40830212,40921062);the China Postdoctoral Science Foundation(No.20080430147);the Program of Key Laboratory of Biogeology and the Environmental Geology of Ministry of Education,China University of Geosciences(No.BGEG0802);the Science Project of Education Department in Jiangxi Province(No.GJJ10623)

摘　　要：Series of large conodont samples with 20 species and 3 similar species in 3 genera were collected from the Permian-Triassic （P-T） boundary sequence in a shallow carbonate facies at Yangou （沿沟）, Leping （乐平） County, Jiangxi （江西） Province, South China. On the basis of the distributions of the identified species, seven conodont zones have been recognized in ascending order as follows, Neogondolella changxingensis zone, Neogondolella yini zone, Hindeodus changxingensis zone, Neogon- dolella taylorae zone, Hindeodus parvus zone, Isarcicella staeschei zone, and IsarciceUa isarcica zone. The successive occurrences of Hindeodus changxingensis, NeogondoleUa taylorae and Hindeodus parvus serve as proxies for defining the P-T biostratigraphy boundary at the base of Sub-bed 21-4 of Bed 21 in the Yangou Section. Correlations with the Meishan Section are also discussed in terms of conodont bio-stratigraphy. Three successive conodont faunal assemblages are grouped through the P-T transitional interval to examine the evolution of conodonts across the great transitional event.Series of large conodont samples with 20 species and 3 similar species in 3 genera were collected from the Permian-Triassic （P-T） boundary sequence in a shallow carbonate facies at Yangou （沿沟）, Leping （乐平） County, Jiangxi （江西） Province, South China. On the basis of the distributions of the identified species, seven conodont zones have been recognized in ascending order as follows, Neogondolella changxingensis zone, Neogondolella yini zone, Hindeodus changxingensis zone, Neogon- dolella taylorae zone, Hindeodus parvus zone, Isarcicella staeschei zone, and IsarciceUa isarcica zone. The successive occurrences of Hindeodus changxingensis, NeogondoleUa taylorae and Hindeodus parvus serve as proxies for defining the P-T biostratigraphy boundary at the base of Sub-bed 21-4 of Bed 21 in the Yangou Section. Correlations with the Meishan Section are also discussed in terms of conodont bio-stratigraphy. Three successive conodont faunal assemblages are grouped through the P-T transitional interval to examine the evolution of conodonts across the great transitional event.

关 键 词：Permian-Triassic boundary conodont biostratigraphy conodont evolution Yangou South China. 

分 类 号：P539[天文地球—古生物学与地层学]