西藏措勤县打加错地区硅质岩中首次发现晚三叠世放射虫化石及其意义  

Firstly discovered late Triassic radiolarian fossils in siliceous rocks in DaJiacuo area,Coqên county,Tibet and their significance

作　　者：黄韶春[1] 龚臣[1] 赵希良 蔡青龙 

机构地区：[1]江西省地矿局九一五地质大队,南昌330002

出　　处：《资源调查与环境》2013年第4期216-220,共5页Resources Survey & Environment

基　　金：中国地质调查局地质调查项目(项目编码:1212011086038)资助

摘　　要：在西藏冈底斯山西部措勤县打加错地区新发现一套紫红色石英砂岩、钙质粉砂岩、生物碎屑微晶灰岩夹放射虫硅质岩的地层体,在硅质岩中首次发现了晚三叠世卡尼期—诺利期放射虫动物群Pseudostylosphaerasp.,Perispongidiumcf.tethys De Wever。放射虫化石的发现对冈底斯山西部打加错地区地层的划分和地质构造发展演化史的研究具有重要意义。A set of strata consist of purple quartz sandstone, calcareous siltstone, bioclastic micrite and radiolari- an-bearing siliceous rocks are discovered in Dajiacuo area, Coqen county, Tibet. The late Triassic Carnian- Norian radiolarian Group Pseudostylosphaera sp. , Perispongidium cf. tethys De Wever in siliceous rocks are firstly identified in this paper, having an important significance for studying on the stratigraphic division and geological tectonic evolution of Jiadacuo area in the west of Gangdise.

关 键 词：放射虫硅质岩 晚三叠世 冈底斯山西部 西藏 

分 类 号：Q911.23[天文地球—古生物学与地层学]