贵州省紫云县宗地乡下二叠统隆林阶地层初步研究  

A PRELIMINARY STUDY OF THE EARLY PERMIAN LONGLINIAN FUSULINACEAN BIOSTRATIGRAPHY FROM ZONGDI SECTION, ZIYUN COUNTY, GUIZHOU PROVINCE

作　　者：史宇坤[1] 杨湘宁[1] 刘家润[1] 董琳[1] 朱李鸣[1] 林春明[1] 

机构地区：[1]南京大学地球科学系,江苏南京210093

出　　处：《地层学杂志》2004年第4期326-330,i002,i003,共7页Journal of Stratigraphy

基　　金：国家自然科学基金 ( No.40 0 72 0 0 8);国家重点基础研究发展规划项目 ( G2 0 0 0 0 7770 0 )资助

摘　　要：贵州省紫云县宗地乡下二叠统隆林阶实测地层剖面中含类化石 8属 2 1种。就类动物群的特征分子及属种分异度等而言 ,宗地剖面与广西宜山马脑山剖面相同 ,均以 Staffella与 Pseudoendothyra为标志 ,但宗地剖面类动物群属种分异度较高 ;在类动物群物种主要构成类群上 ,宗地剖面与云南广南小独山剖面情况较为相似 ,皆以 Pseudofusulina与 Schwagerina分子共同繁荣为特征 ,但属种分异度相对较低。宗地剖面隆林期沉积环境总体上类似于开阔台地环境 ,但与典型的台地边缘及滨海边缘沉积环境相比 ,其水动力条件相对较差、能量相对较低。Twenty one fusulinacean species belonging to eight genera are found from a new section of the Early Permian Longlinian in Zongdi, Ziyun county of Guizhou Province. A comparison of the fusulinacean assemblage based on characteristic genera and species diversity and dominant components has been made with those in the related sections of the same age in South China to reveal the similarities and differences of inferred sedimentary environment of the Longlinian in the Zongdi section between these sections and the other sections. As far as the characteristic genera are concerned, fusulinacean assemblage from the Zongdi section resembles that from the Manaoshan section of Yishan county, Guangxi in having Staffella and Pseudoendothyra, but its genera and species diversities are much higher than the latter, which was interpreted as a typical assemblage of restricted platform. Fusulinacean assemblage from the Zongdi section is similar to that from the Xiaodushan section of Guangnan County in Yunnan Province that both are abundant with species of Pseudofusulina and Schwagerina. However, its overall genera and species diversities are lower than the latter, a fauna typical of in the platform margin. Analysis has suggests that the sedimentary environment of the Longlinian rocks in the Zongdi section was similar to an open platform but with relatively low water energy.

关 键 词：生物地层 隆林阶 二叠系 TING类 紫云 宗地 贵州 

分 类 号：P534.46[天文地球—古生物学与地层学]