四川盐边稗子田志留系牙形刺生物地层的再研究  

RESTUDY ON THE SILURIAN CONODONT BIOSTRATIGRAPHY OF THE BAIZITIAN SECTION IN YANBIAN COUNTY,SICHUAN

作　　者：王成源[1] 王平[2] 杨光华[2] 谢伟[2] 

机构地区：[1]中国科学院南京地质古生物研究所,江苏南京210008 [2]长安大学地球科学与国土资源学院,陕西西安710054

出　　处：《地层学杂志》2009年第3期302-317,共16页Journal of Stratigraphy

基　　金：全国地层委员会"中国主要断代地层建阶研究"项目的资助

摘　　要：首次在稗子田剖面发现Caudicriodus woschmidti并确认Pterospathodus eopennatus带的存在;以前报道的本剖面的Ozarkodinacrispa和Ozarkodina eosteinhornensis经4次样品分析,仍得不到确认。稗子田剖面的普里道利统(Pridoli)的沉积可能不全,不宜建阶。志留系与泥盆系之间可能为假整合。进一步讨论了牙形刺分带以及志留系内部统间的界线。认为金淳泰等(2005)依据稗子田剖面命名的6个新阶名,不宜使用。Two conodont zones, Caudicriodus woschmidti Zone and P. eopennatus Zone are first described from the Baizitian Section by the present authors. Previous reports that Ozarkodina crispa and Ozarkodina eosteinhornensis were present at this section can not be verified through four times of sample collection and analysis. Pridoli deposits of the Baizitian section could be incomplete, and this section is not suitable for the establishment of a new stage. The contact between the Silurian and Devonian strata at this section could he a pseudoconformity. Conodont zones and Series boundary within the Silurian are briefly discussed in this paper. The present authors conclude that the six new Silurian Stages named by Jin etal. （2005） can not be used in China.

关 键 词：C.woschmidti带 假整合 普里道利统 志留系 盐边 四川 

分 类 号：P534.43[天文地球—古生物学与地层学]