| 塔里木盆地面西部白垩纪—古新世有孔虫群落的划分及其环境意义 |
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| 引用本文：郭宪璞.1995.塔里木盆地面西部白垩纪—古新世有孔虫群落的划分及其环境意义[J].地球学报,16(1):77-86. |
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| 中文摘要:有孔虫是塔里木盆地西部海相白垩系－古新统的最重要化石门类之一，可划分为９个群落。西文依据有孔虫壳质类型变化规律，有孔虫壳壁微量元素和群烽理统计探讨有孔虫群落有其生存环境的关系，特别是与温度和盐度的关系，重塑这一时期古海洋环境演变。 |
| 中文关键词:有孔虫群落 数理统计 微量元素分析 白垩纪－古新世 塔里木盆地 |
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| Cretaceous Paleocene Foraminiferal Communities from the Western Tarim Basin and Their Environmental Significance |
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| Abstract:Foraminifera is one of the most important fossil faunas of the marine Cretaceous and Paleocene inthe Western Tarim Basin. Several factors considered in this papor for recognizing and classifying com-munities are as follows:1. Easily distinguishable composition and structure of community;2.The internal uniformity of community-the difference among the members within one com- munity is less distinct than that between the members of it and other communities;the differencesamong the distribution areas of the same community less distinct than those among the distribution ar-eas of different communities:3.Easily recognizable boundaries between communities;4.Definite continuity and rcappearance of geographical distribution;5.The role of endemic genera and species.According to fhe above criteria,the Cretaceous-paleocene foraminifera in the Western TarimBasin can be de divided into 9 communities. The communities are named after characteristic genera(Table1). This paper deals mainly with the changes of Paleoceanographical environments in which theforaminiferal communities existed,especially with the changes in temperature and salinity revealed byanalyses of test composition and trace elements in the test,and by statistic studies of species density,richness,diversity, equitability and dominance. |
| keywords:foraminiferal community mathematical statistics analysis of trace element Cre-taceous-Paleocene the wester Tarim basin |
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