介形类化石Cypridea(Pseudocypridina)gigantea的地层及环境意义  

Stratigraphic and Environmental Significance of Ostracod Cypridea(Pseudocypridina)Gigantea

作　　者：郑秀亮[1] 商华[1] 

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2007年第1期64-66,共3页Xinjiang Petroleum Geology

摘　　要：介形类化石Cypridea(Pseudocypridina)gigantea是准噶尔盆地晚白垩世的重要分子,其地质时代应为晚白垩世中晚期,相当于坎潘尼-马斯特里赫特期;在我国上白垩统普遍见到,其地理分布广,地质时限短,可作为晚白垩世的标志分子,在地层划分对比中举足轻重。由于晚白垩世准噶尔盆地普遍发育红层,气候比较干燥,处于氧化及蒸发环境,生物化石较贫乏,介形类化石反映当时为偏淡水浅水环境,生活水域为低盐度的湖泊、沼泽、池塘、河流等,主要为河流-浅湖环境。Cypridea （Pseudocypridina） gigantea of ostracods is regarded as the important member of Late Cretaceous in Junggar basin. It is an ostracod of the mid-late epoch of Late Cretaceous, corresponding to Campania-Maestrichian epoch, widespread in Upper Cretaceous in China. It can be as a marker member of Late Cretaceous for its broad distribution in geography, but short duration in geologic period and well used for strata classification and correlation. From well- developed red layer of Late Cretaceous in Junggar basin, with drier climate, oxidized and evaporated environment, fewer bio-fossils at that time. The existence of ostracod indicates a little fresh and shallow water environment like lake, marsh, pond, river, etc., with low salinity, mostly being river-shallow lake environment in Late Cretaceous of Junggar basin.

关 键 词：准噶尔盆地 Cypridea(Pseudocypridina)gigantea 化石 晚白垩世 

分 类 号：Q915[天文地球—古生物学与地层学]