新疆塔里木盆地早白垩世克孜勒苏群孢粉组合  

EARLY CRETACEOUS PALYNOFLORAS FROM THE KIZILSU GROUP IN THE TARIM BASIN, XINJIANG

作　　者：江德昕[1] 王永栋[2] 何卓生[3] 董凯林[3] 倪庆[2] 田宁[2] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国科学院南京地质古生物研究所,南京210008 [3]中国石化西北石油地质局勘探开发研究院,乌鲁木齐830011

出　　处：《微体古生物学报》2006年第4期371-391,共21页Acta Micropalaeontologica Sinica

基　　金：国家重点基础研究发展规划项目(No.2006CB700400);国家自然科学基金项目(No.40472004)资助。

摘　　要：基于新疆塔里木盆地西南区和东南区下白垩统克孜勒苏群发现的孢子花粉57属96种的研究,建立了克孜勒苏群下亚旋回和上亚旋回孢粉组合,并根据孢粉组合讨论了地层时代。克孜勒苏群孢粉组合以松杉目的优势、真蕨目海金沙科的显赫和原始被子植物的出现为特征。克孜勒苏群下亚旋回孢粉组合与欧洲韦尔登期(陆相尼欧克姆期)和北美巴列姆期孢粉组合可以对比,克孜勒苏群上亚旋回孢粉组合与欧亚大陆、北美和澳大利亚阿普第期至阿尔必期孢粉组合可以对比。根据孢粉学证据,克孜勒苏群下亚旋回应属于尼欧克姆期,或赫特里夫期至巴列姆期,克孜勒苏群上亚旋回应归于阿普第期至阿尔必期。Ninety six species of spores and pollen of 57 genera found from the Lower Cretaceous Kizilsu Group in the southwestern and southeastern regions of the Tarim Basin of Xinjiang are dealt with in this study. The palyno assemblages for the Lower Subcycle and the Upper Subcycle of the Kizilsu Group are established, and the ages are discussed in this paper. The Kizilsu palynofloras are characterized by the dominance of coniferae, abundance of schizaeaceous ferns and presence of primitive angiospermous pollen. The palynofloras from the Lower Kizilsu Group are comparable with those of Wealden （terrestrial Neocomian） of Europe and Barremian of North America; and the palynoflora from the Upper Kizilsu Group is comparable with those of Aptian and Albian of Eurasia, North America, and Australia. The palynological evidence suggests that the Lower Kizilsu Group should belong to Neocomian or Hauterivian to Barremian in age and the Upper Kizilsu Group should be of Aptian to Albian in age.

关 键 词：孢粉组合 尼欧克姆期 阿普第期-阿尔必期 早白垩世 克孜勒苏群 塔里木盆地 

分 类 号：Q914[天文地球—古生物学与地层学]