高校地质学报2001，Vol.7Issue(1)：106-117,12.
西藏岗巴晚白垩世有孔虫动物群与海平面变化
Late Cretaceous Foraminiferal Faunas and Eustatic Change in Gamba Area,Southern Tibet
摘要
Abstract
The Zongshan section in Gamba of southern Tibet has long been considered as the standard section for the Cretaceous of the Tethyan Himalayas.The Late Cretaceous strata are well exposed in this area and containabundant foraminife ral fossils,from which 130 species of 52 genera have been identified.The rocks are mostly marine carbonates.Systematic studies of the microfauna and petrolog y have been conducted to establish anew stratigraphic framework for this area and the relationship between the foraminiferal faunas and the sea-level changes .
The Late Cretaceous strata in this area can be subdivided into three Formations,which are (inascending order) the Lengqingre Formation,Gangbacunkou Formationand Zongshan Formation.They are roughly of the Cenomanian to early Turonian,m iddle Turonian-Santonianand Campanian - Maastrichtianage.
Ten planktonic foraminiferal zones were recognized,which can be correlated with similar zones in Pakistan,Europe and America.Inaddition,5 foraminiferal fau nas,represented by Rotalipora fauna，Whiteinella-Helvetoglobotruncana fauna,Dicarinella-Marginotruncana fauna，Globotruncana-Globotruncanita fauna and Orbitoides-Omphalocyclus fauna,can be recognized.The evolution of the f orami niferal faunas in this area occured mainly in response to the eustatic changes w hich have affected biological niche of the microplankton.关键词
海平面变化/有孔虫动物群/晚白垩世/西藏岗巴分类
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赵文金..西藏岗巴晚白垩世有孔虫动物群与海平面变化[J].高校地质学报,2001,7(1):106-117,12.
