四川广元旺苍罐子坝剖面长兴组与大隆组牙形刺及其生物地层研究  

STUDY ON THE CONODONTS AND BIOSTRATIGRAPHY OF THE CHANGXING AND DALONG FORMATIONS AT THE GUANZIBA SECTION,WANGCANG,GUANGYUAN,SICHUAN PROVINCE

作　　者：房强[1] 景秀春[1] 邓胜徽[2] 王训练[1] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国石油勘探开发研究院,北京100083

出　　处：《微体古生物学报》2012年第2期195-206,共12页Acta Micropalaeontologica Sinica

基　　金：国家重大科技专项:大型油气田及煤层气开发课题(2008ZX05004);中国石油天然气股份有限公司重大专项:海相碳酸盐岩大油气田勘探开发关键技术(2008E-0702)资助

摘　　要：系统研究了四川东北部广元市旺苍县罐子坝剖面长兴组和大隆组的牙形刺动物群,鉴定2属21个种(包括2个相似种,1个亲缘种和1个未定种)。划分出4个牙形刺带,从下至上依次为Clarkina orientalis带,C.wangi带,C.changxingensis-C.deflecta带和C.meishanensis带。以C.wangi的首现层面为标志比较精确地确定了该剖面长兴阶的底界,并将该剖面牙形刺序列与浙江长兴煤山经典剖面进行了较为精确的对比。Conodonts in the Changxing Formation and the Dalong Formanon at the Guangyuan, northeastern Sichuan are systematically studied, with 21 species assigned to 2 genera（including 2 confor- mis species, 1 affinis species, 1 Clarkina sp. ）. Four conodont zones are recognized in ascending order as the Clarkina orientalis Zone, the C. wangi Zone, the C. changxingensis-C, deflecta Zone and C. meishanensis Zone. The bottom of the Changxingian at the Guanziba Section is set by the first appearance of Clarkina wangi. The conodont sequence at the Guanziba section has been accuratdy compared with the classical section at Meishan, Changxing, Zhejiang Province.

关 键 词：牙形刺 生物地层 二叠系 长兴组 大隆组 罐子坝剖面 四川广元 

分 类 号：Q915[天文地球—古生物学与地层学]