广西合浦盆地晚白垩世和古新世的介形类化石  

UPPER CRETACEOUS AND PALAEOCENE OSTRACODS FROM THE HEPU BASIN,GUANGXI

作　　者：张显球[1] 林小燕[1] 

机构地区：[1]中国石化集团新星石油广州公司,广东三水528133

出　　处：《微体古生物学报》2011年第1期106-118,共13页Acta Micropalaeontologica Sinica

摘　　要：本文报道合浦盆地晚白垩世乌家组和古新世上洋组的介形类化石14属23种(描述1新种),可划分两个化石组合:(1)Rhombicyprideaquadrata-Heterocypris hepuensis-Li mnocythere sinuata组合,属于Talicypridea动物群,产于乌家组,时代为晚白垩世;(2)Sinocypris excelsa-Cypris concina-Parailyocypris changzhouensis组合,属于Sinocypris动物群,产于上洋组,时代为古新世。乌家组和上洋组为连续的湖相沉积,整合接触,沉积物为颗粒细小的泥岩、泥灰岩和粉砂岩,富含保存良好的介形类化石,将来逐层系统采集,能查明非海相K/E界线地层介形类化石纵向分布规律,是建立介形类化石组合序列,划分化石带和研究K/E界线的理想地区。The ostracods of Late Cretaceous Wujia Formation and Palaeocene Shangyang Formation are found from 18 samples of 8 boreholes in the Hepu Basin,Guangxi.Twenty three species in 14 genera are figured here,including one new species.The ostracod fauna is subdivided into two distinct assemblages：1）Rhombicypridea quadrata-Heterocypris hepuensis-Limnocythere sinuata assemblage from the Wujia Formation,belonging to Talicypridea fauna of the Late Cretaceous;2）Sinocypris excelsa-Cypris concina-Parailyocypris changzhouensis assemblage from the Shang-yang Formation,belonging to Sinocypris fauna of the Palaeocene.Of great interest is the discovery of the boundary strata between the continous non-marine Cretaceous and Palaeogene of China.

关 键 词：介形类 K/E界线 古新世 晚白垩世 合浦盆地 广西 

分 类 号：Q915[天文地球—古生物学与地层学]