海水表面温度变化及其对笔石动物群分布的控制作用——以湖北宜昌奥陶系大湾组为例  

The SST Change and Its Influence on the Distribution of Graptolite Fauna——An Example from the Ordovician Dawan Formation in Yichang,Hubei Province

作　　者：王传尚[1] 汪啸风[1] 陈孝红[1] 李志宏[1] 

机构地区：[1]宜昌地质矿产研究所,湖北宜昌443003

出　　处：《地质学报》2009年第6期751-758,共8页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号40742008和40272020)资助成果

摘　　要：本文通过对宜昌黄花场剖面和宜昌陈家河剖面大湾组83件样品和陈家河剖面红花园组2件样品的碳氧同位素测试数据,分析了奥陶纪大坪期海水表面温度的变化;并以宜昌黄花场剖面大湾组笔石序列为基础,结合华南地区笔石动物群的分布情况,分析了海水表面温度的变化对笔石动物群地理分布的影响,提出温度变化仅是影响笔石动物群地理分布的间接因素,前人的纬度分带学说值得进一步探讨。The changes of sea surface temperature （SST） was discussed based on the carbon and oxygen stable isotope data from total 83 samples of the Dawan Formation at Yichang Huanghuachang section and Chenjiahe section, 2 samples of the Honghuayuan Formation at Chenjiahe section. The influence of SST on the distribution of graptolite fauna was consequently analyzed based on the study of graptolite sequence of Dawan Formation at Huanghuachang section and the data of the distribution of graptolite fauna on South China. It is concluded that the changes of SST is only an indirect factor for the distribution of graptolite fauna; the former theory of latitudinal zonation need to be prove by further more study.

关 键 词：奥陶系 大湾组 笔石动物群 海水表面温度 

分 类 号：Q915[天文地球—古生物学与地层学]