柴达木盆地西部中新统介形类Cyprideis序列及其古生态特征与高分辨率层序地层划分  

MIOCENE FOSSIL CYPRIDEIS SUCCESSION FROM THE WESTERN QAIDAM BASIN AND ITS PALEOECOLOGICAL FEATURES AND HIGH-RESOLUTION SEQUENCE STRATIGRAPHIC SUBDIVISION

作　　者：杨平[1] 江小青[1] 铁成文 路艳丽[1] 袁秀军[1] 

机构地区：[1]青海油田勘探开发研究院,甘肃敦煌7362020 [2]青海油田天然气开发公司,青海格尔木81600

出　　处：《微体古生物学报》2013年第1期42-48,共7页Acta Micropalaeontologica Sinica

基　　金：中国石油天然气股份有限公司"柴达木盆地建设千万吨油气田综合配套技术研究"(编号2011E-03)项目资助

摘　　要：通过对柴达木盆地西部东柴山剖面上油砂山组和下油砂山组 Cyprideis 属化石的对比研究,划分出了如下四个种群类型: A.Cyprideis sp. (下油砂山组上部), B.C.shizigouensis (上油砂山组下部), C.C.posticlina (上油砂山组中下部), D.C.subeboliangensis (上油砂山组中上部)。经与砂新 1 井和砂 38 井对比,厘定了英东地区上油砂山组/下油砂山组的 Cyprideis 生物地层序列,并对 Cyprideis 各种群化石的鉴定特征作了简要总结。古生态特征所反映的沉积环境变化对高分辨率层序地层划分具有指导作用。Through analyses of fossil Cyprideis from tne Upper Youshashan Formation and the Lower Youshashan Formation of Dongchaishan section in the western Qaidam Basin, four species groups have been classified as below： A. Cyprideis sp. （the upper part of the Lower Youshashan Fm. ）,B.C. shizigouensis（the lower part of the Upper Youshashan Fm. ）, C. C. posticlina（the mid-lower part of the Upper Youshashan Fm. ）,D.C. subeboliangensis （the mid-upper part of the Upper Youshashan Fm. ）. By correlating these fossil groups with that of wells Shaxin 1 and Sha 38, the biostratigraphical succession of the Upper Youshashan Formation and the Lower Youshashan Formation in Yingdong area is revised, and the characteristics of fossil Cyprideis groups is briefly summarized. The changes of sedimentary environment corresponding to the paleoecological characteristics is helpful to the subdivision of high-resolution sequence stratigraphy.

关 键 词：介形类 古生态 化石序列 高分辨率层序地层 上油砂山组 下油砂山组 东柴山剖面 柴达木盆地 

分 类 号：P618.13[天文地球—矿床学]