山东济宁煤田(东区)本溪组和太原组牙形刺生物地层  

CONODONT BIOSTRATIGRAPHY IN TAIYUAN AND BENXI FORMATIONS FROM THE JINING COALFIELD (EAST AREA), SHANDONG

作　　者：蒋汉朝[1] 张锡麒[2] 王明镇[2] 李增学[2] 

机构地区：[1]中国科学院地质与地球物理研究所新生代地质与环境研究室,北京100029 [2]山东科技大学地球科学系,山东泰安271019

出　　处：《地层学杂志》2002年第1期27-32,38,共7页Journal of Stratigraphy

基　　金：国家自然科学基金项目 ( No.49872 0 5 7)资助

摘　　要：通过对山东济宁煤田 (东区 )本溪组和太原组牙形刺动物群的系统研究 ,共鉴定出牙形刺化石 7属 2 0种。根据牙形刺化石在地层中的分布和垂向的变化规律自上而下建立了两个牙形刺组合 : .Streptognathodus isolatus组合和 .Idiognathodus magnificus- I.delicatus组合。通过与邻区及华北部分地区对比 ,本区本溪组和太原组中牙形刺动物群的地质时代应分别为晚石炭世晚期 (组合 )和早二叠世早期 (组合 ) ,本区 C/genera and 20 species of conodonts have been found from the Taiyuan and Benxi Formations in the Jining Coalfield (east area), Shandong Province. According to the geographical distribution and vertical variation of conodont fossils in the strata, the conodonts may be distinguished into 2 assemblages as following (in descending order): Ⅱ.Streptognathodus isolatus and Ⅰ. Idiognathodus magnificus-I. delica-tus assemblage. Compared with those in nearby regions and some other areas in North China, the geological ages of the fauna in the Jining coalfield should be early Early Permian(assemblage Ⅱ) and late Late Carboniferous(assemblage Ⅰ) respectively, and the Carboniferous-Permian boundary in the Jining coalfield (east area) should be placed at the bottom of No.11 limestone.

关 键 词：牙形刺动物群 本溪组 太原组 济宁煤田 山东 石炭系 二叠系 生物地层 

分 类 号：Q915.81[天文地球—古生物学与地层学]