新疆塔里木拜城地区早白垩世舒善河组孢粉组合  

EARLY CRETACEOUS SPOROPOLLEN ASSEMBLAGES FROM THE SHUSHANHE FORMATION IN BAICHENG AREA OF THE TARIM BASIN,XINJIANG

作　　者：江德昕[1] 王永栋[2] 何卓生[3] 董凯林[3] 

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》2007年第3期247-260,共14页Acta Micropalaeontologica Sinica

基　　金：国家重点基础研究发展计划项目(No.2006CB700400);国家自然科学基金项目(No.40472004;0650220309)资助

摘　　要：基于新疆塔里木盆地北部拜城卡普沙良河剖面下白垩统舒善河组发现的29属48种孢子花粉的研究,建立舒善河组自下而上的4个孢粉亚组合,分别为Classopollis-Cycadopites-Lygodioisporites-Biretisporites(CCLB)亚组合,Classopollis-Dicheiropollis-Schizaeoisporites-Klukisporites(CDSK)亚组合,Classopollis-Dicheiropollis-Par-visaccites-Lygodiumsporites(CDPL)亚组合和Classopollis-Dicheiropollis-Pinuspollenites-Impardecispora(CDPI)亚组合。舒善河组孢粉植物群以松柏类掌鳞杉科植物占优势以及真蕨类海金沙科的繁盛为主要特征。该孢粉植物群与欧洲、亚洲、美洲和澳大利亚早白垩世尼欧克姆期孢粉植物群可以对比。根据孢粉学证据,舒善河组的时代属于尼欧克姆期或欧特里夫期至巴列姆期。Forty-eight species of spores and pollen referred to 29 genera have been investigated from the Lower Cretaceous Shushanhe Formation exposed along the Kapushaliang River in Baicheng county, northern Tarim Basin, Xinjiang. In accordance with the constituent peculiarity of spores and pollen in the different beds, the sporopollen assemblage of the Shushanhe Formation may be divided into the following four subassemblages in ascending order： Clas- sopollis-Cycadopites-L ygodioisporites-Biretisporites （CCLB） subassemblage, Classopollis -Dicheiropollis-Schizaeoisporites-Klukisporites （CDSK） subassemblage, Classopollis-Dicheiropollis-Parvisaccites-Lygodiurnsporites （CDPL） subassemblage and Classopollis-Dicheiropollis-Pinuspollenites-Irnpardecispora （CDPI） subassemblage. The palynoflora of the Shushanhe Formation is characterized by the dominance of Cheirolepidiaceae of Coniferales and the influence of Lygodiaceae and Schizaeaceae of Filicales. The present palynoflora is comparable with those of Neocomian assemblages of Europe, Asia, America and Australia. The palynological evidence suggests that the Shushanhe Formation belong to Neocomian or Hauterivian to Barremian in age.

关 键 词：孢粉组合 尼欧克姆期 早白垩世 舒善河组 塔里木盆地 

分 类 号：Q913[天文地球—古生物学与地层学]