东昆仑万宝沟岩群古近纪孢粉化石的新发现  

DISCOVERY OF THE PALEOGENE SPORE-POLLEN FROM THEWANBAOGOU GROUP-COMPLEX OF EASTERN KUNLUN

作　　者：郭宪璞[1] 王乃文[1] 丁孝忠[1] 赵民[1] 王大宁[1] 

机构地区：[1]中国地质科学院地质研究所,北京100037

出　　处：《地层学杂志》2005年第B11期608-611,i0010,共5页Journal of Stratigraphy

基　　金：国家自然科学基金项目(No.40272019);国家地质调查局项目(编号:200313000054)的成果。

摘　　要：万宝沟岩群是东昆仑造山带一套构造—沉积混杂堆积地层,由外来系统和基质系统两部分组成。以往根据外来岩块中的叠层石等将该岩群的时代定为前寒武纪的蓟县纪—青白口纪。最近在该岩群的基质系统中分析出22属(未定种)与15种古近纪渐新世孢粉化石,这一重要发现为厘定该岩群的地质时代、进一步确定该岩群的混杂堆积地层性质和阐述东昆仑造山带形成演化机制等方面具有重要的地质意义。The Wanbaogou Group-complex is made of exotic blocks and matrix strata of a tectonic-sedimentary m61ange. On the basis of the fossils yielded from exotic blocks, the age of this group-complex was defined as the Precambrian before. This time, 22 genera （ species incertae ） and 15 species of the Paleogene spores and pollen fossils are newly found in samples from the matrix strata of this group-complex. It is of important geological significance in clearifying the age of this group-complex, further proving the m61ange nature of this group-complex and explaining the evolutionary mechanism of the Eastern Kunlun orogenic belt.

关 键 词：古近纪 渐新世 孢粉化石 万宝沟岩群 东昆仑造山带 青海 

分 类 号：P534.61[天文地球—古生物学与地层学]