台北凹陷晚三叠世孢粉组合及其地层意义  

Late Trassic sporopollen assemblages from the Taibei subbasin in the Turpan-Hami Basin,Xinjiang and their stratigraphical significance

作　　者：尹凤娟[1] 华洪[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2009年第6期1014-1017,1047,I0013,共6页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40332016)

摘　　要：目的研究吐鲁番—哈密盆地台北凹陷黄山街组和郝家沟组的地层特征和孢粉组合。方法利用该区4口钻井52块岩心样品进行孢粉化石分析、鉴定、统计和比较。结果鉴定出孢粉化石51属56种;建立了黄山街组Aratrisporites-Apiculatisporites-Piceites组合和郝家沟组Osmundacidites-Aratrisporites-Cycadopites组合。结论台北凹陷黄山街组和郝家沟组的地质时代为晚三叠世。Aim To study the stratigraphic features and sporopollen assemblages of the Huangshanjie and Haojiagou formations in the Taibei subbasin of the Turpan-Hami Basin. Methods By a comparative analysis of sporopollen fossils in 52 samples from 4 boreholes. Results 56 Species of fossil spores and pollen assigned to 51 genera are recognized, and two sporopollen assemblages are established in ascending order as follows： Aratrisporites-Apiculatis- poris-Piceites assemblage （of the Huangshanjie Fm. ） and Osmundacidites-Aratrisporites-Cycadopites assemblage （of the Haojiagou Fro. ）. Conclusion The Huangshanjie and Haojiagou Formations are Late Trassic in age, and their relative correlation within China and abroad are ascertained.

关 键 词：孢粉组合 晚三叠世 吐鲁番-哈密盆地 

分 类 号：Q913.84[天文地球—古生物学与地层学]