湖南衡阳盆地岭茶地区古近纪介形类动物群  

PALEOGENE OSTRACODS FROM THE HENGYANG BASIN OF HUNAN

作　　者：张显球[1] 李茜[2] 

机构地区：[1]中国石化集团新星石油广州公司,广东三水528133 [2]中国科学院古脊椎动物与古人类研究所,北京100044

出　　处：《古生物学报》2010年第4期487-501,共15页Acta Palaeontologica Sinica

基　　金：科技部基础司基础性专项<中国地层立典剖面及若干断代全球界线层型>中的古新统/始新统界线剖面研究课题(2006FY120300-15);国家重点基础研究发展计划项目(2006CB806400);全国地层委员会<中国主要断代建阶项目>资助

摘　　要：描述衡阳盆地东北部岭茶地区介形类化石9属23种。岭茶地区古近纪介形类动物群以Cypris和Li mnocythere两属最繁盛,可划分为两个化石组合:栗木坪组为Cypris henanensis-Cyprois reniformis-Li mno-cythere honggangensis组合,岭茶组为Li mnocythereirregularis-Cypris favosa-Ilyocypris gaoyouensis组合。岭茶地区栗木坪组与珠江三角洲地区宝月组的介形类动物群相同,岭茶组与华涌组的介形类面貌也基本相同,因此栗木坪组和岭茶组的时代应属晚古新世和早始新世,这与栗木坪组和岭茶组中哺乳动物、古地磁和碳氧同位素的研究结果相一致。Twenty three species of 9 genera of ostracods were found in the Lingcha area of the Hengyang Basin,Hunan Province. Among them,Paleogene Cypris and Limnocythere are most abundant. Two ostracod biozones are recognized：the lower zone Cypris henanensis-Cyprois reniformis-Limnocythere honggangensis in the Limuping Formation and the upper one Limnocythere irregularis-Cy-pris favosa-Ilyocypris gaoyouensis in the Lingcha Formation. The ostracod faunas of the Limuping and Lingcha formations are similar to those of the Baoyue and Huayong formations of the Pearl River delta region respectively. This would suggest a late Paleocene age for the Limuping Formation and an early Eocene age for the Lingcha Formation. These suggestions are consistent with the results of mammal fauna,paleogeomagnetism and carbon-oxygen isotopes from the Limuping and Lingcha formations.

关 键 词：介形类 早始新世 晚古新世 岭茶地区 衡阳盆地 湖南 

分 类 号：Q915[天文地球—古生物学与地层学]