川渝地区中二叠世晚期腕足动物的灭绝  

Extinction of Late Middle Permian Brachiopod in Sichuan-Chongqing Area

作　　者：曾勇[1] 王茵[1] 陈松[1] 孟祥芬[1] 

机构地区：[1]中国矿业大学资源与地球科学学院

出　　处：《中国矿业大学学报》2008年第1期5-9,共5页Journal of China University of Mining & Technology

基　　金：现代古生物学和地层学国家重点实验室课题(073109)

摘　　要：自从二叠纪生物集群灭绝分为不同的两幕这一观点提出以来,前乐平世事件在不同古地理区系的灭绝模式是否相同是许多学者所关心的热点问题之一.通过川渝地区中二叠世晚期的腕足动物化石资料的研究,表明本地区中二叠世晚期的乐平世事件中腕足动物的灭绝可划分为前后2个不同的次级幕:早期的五十三梯亚期之末的第一幕和晚期的倒钻岩亚期之末的第二幕,且第二幕的灭绝规模要比第一幕更大.同时,还识别出若干个灾后泛滥属、狭义幸存属和复活幸存属.Whether the extinction patterns of Pre-Lopingian event in different paleogeographical province are uniform has become one of the hotspots which many academicians concern since the viewpoint that the mass extinction in Permian contains two stages was recognized. Based on the analysis on brachiopod fossils of the late middle Permian, the brachiopod extinction in Pre- Lopingian event of late middle Permian in this area can be divided into two sub screens： the first screen in the end of earlier Wushisanti Subage and the second screen in the end of later Daozuanyan Subage. The second screen＇s extinct scope is larger than the first screen＇s. Some Disaster taxa, Survivor taxa and Lazarus-Survivor taxa were also identified.

关 键 词：川渝地区 中二叠世晚期 腕足动物 灭绝 前乐平世事件 

分 类 号：Q915.816[天文地球—古生物学与地层学]