Roadian-Wordian(Middle Permian)Conodont Biostratigraphy,Sedimentary Facies and Paleotemperature Evolution at the Shuixiakou Section,Xikou Area,Southeastern Qinling Region,China  

作　　者：Baojin Wu Hanxiao Li Michael M.Joachimski Paul B.Wignall Haishui Jiang Lina Wang Xianlang Wu Xulong Lai Jiaxin Yan 

机构地区：[1]State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430078,China [2]School of Earth Sciences,China University of Geosciences,Wuhan 430074,China [3]GeoZentrum Nordbayern,Universitat Erlangen-Nürnberg,Erlangen 91054,Germany [4]School of Earth and Environment,University of Leeds,Leeds LS29JT,UK [5]College of Resources,Hebei GEO University,Shijiazhuang 050031,China

出　　处：《Journal of Earth Science》2021年第3期534-553,共20页地球科学学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.41572002,41830320,and 41661134047)。

摘　　要：Focusing on the Shuixiakou Section(Xikou area,Zhen’an County,Shaanxi Province,southeastern Qinling region,China),the Roadian-Wordian conodonts are investigated.More than 2000 conodont elements including 6 genera and 14 species have been obtained.Based on these materials,the Guadalupian Jinogondolella nankingensis and J.aserrata zones have been recognized.The Roadian-Wordian boundary is tentatively defined by the first occurrence of J.aserrata in the lower part of UnitⅢin the Shuixiakou Formation.The sedimentary succession of Xikou area records similar sea-level changes to those observed in Laibin area(South China).The 40 m-thick bioclastic limestone of UnitⅣin this section can be correlated with the reefs of Bed 114 in Laibin area.A temperature drop indicated byδ18Oapatite values suggests this Wordian interval coincides with a period of glaciation and global regression.

关 键 词：biostratigraphic framework sea-level change PALEOTEMPERATURE Roadian-Wordian boundary Shuixiakou Section 

分 类 号：Q911[天文地球—古生物学与地层学] P534.46[生物学—古生物学]