东昆仑西端布喀达坂峰地区二叠纪孢粉型化石的发现  

DISCOVERY OF THE PERMIAN PALYNOMORPH FOSSILS IN THE BUKEDABAN PEAK AREA AT THE WESTERN END OF EASTERN MT. KUNLUN AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：宋泰钟[1] 尹磊明[2] 欧阳舒[2] 王秉璋[1] 王瑾[1] 叶占福[1] 宋生春[1] 

机构地区：[1]青海省地质调查院,青海西宁810012 [2]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2004年第2期142-147,共6页Journal of Stratigraphy

基　　金：1/25万<布喀达坂峰幅>国土资源大调查项目(200113000059)资助

摘　　要：在东昆仑西端布喀达坂峰地区二叠纪地层中首次发现陆相孢粉与海相疑源类化石一起保存的孢粉—疑源类化石组合。经对两个样品较为丰富的孢粉型化石研究后发现,上部组合以裸子植物花粉占优势,双囊无肋花粉最多,可与塔里木盆地的卡伦达尔组的孢粉组合做粗略的比较,但组合中出现了时代偏晚的Ephedripites及Taeniae-sporites,因此,研究区马尔争组中段复理石地层的时代当为中二叠世—晚二叠世。Poor preserved continental sporo-pollen fossils associated with marine acritarchs were first found in the Permian strata of the Bukedaban Peak area at the western end of eastern Mt.Kunlun.Based on the study of two samples containing rich sporo-pollen fossils,it is found that the upper assemblage is dominated by gymnosperm pollen grains,with bisaccate non-striate pollen being the most numerous, which may be compared with the sporo-pollen assemblage from the Kalundaer Formation in the Tarim Basin.However,Ephedripites and Taeniaesporites of slightly later age also occur in the assemblage and therefore the age of the flysch strata in the middle member of the Maerzeng Formation in the study area should be Middle to Late Permian.

关 键 词：二叠纪 孢粉化石 疑源类 复理石 马尔争组 东昆仑 

分 类 号：P534.46[天文地球—古生物学与地层学]