东昆仑西端布喀达坂峰地区二叠纪孢粉型化石的发现

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。

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

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.