西昆仑琼恰特一带温泉沟群地层划分  

THE STRATA DEMARCAT OF WENQUANGOU GROUP IN QIONGQIATE BELT IN WEST KUNLUN,XINJIANG

作　　者：高永利[1] 石晨霞[1] 方怀宾[1] 卢书伟[1] 李春艳[1] 李瑞强[1] 

机构地区：[1]河南省地质调查院,河南郑州450001

出　　处：《新疆地质》2011年第4期393-397,共5页Xinjiang Geology

基　　金：新疆1:5万阿勒塔什幅;恰克拉克幅;阿克别尔迪沟幅;布伦口幅区域地质调查(编号:1212010610310)资助

摘　　要：在西昆仑琼恰特一带1∶5万区域地质矿产调查中,发现一套浅变质碎屑岩和碳酸盐岩,其上叠加了中-高级热接触变质岩组合,沉积环境为滨-浅海相.上部碎屑岩内首次发现Laevolancis divellomedia(Chibrikova)Burgess etRichardson(光面掌状体)、Dyadospora murusdensa Strorher et Traverse(耳状加厚二分体)及Artempoyra brevicostaBurgess et Richardson(单侧加厚梨形体)孢粉化石,时代为早志留世.前人将该套地层划分为中—晚志留世温泉沟群和达坂沟群.本次研究据区域地层对比和孢粉化石年龄,重新将其厘定为下志留统温泉沟群.据岩石组合特征,该群自下而上划分为阿克别尔迪沟组和琼恰特组,该地层内层控型铁矿、中低温热液型铜矿均具很好找矿远景.The confirming and blocking of Silurian Strata is new finding is disputed for more,the 1：50000 Regional Geologic and Mineral surveying discovers a suit of shallow marine carbonate rock-clastic rock building,It superimposed middle-high level katogenic contact metamorphic rocks combination,the sedimentary environment were shore -neritic area,it first discovered Laevolancis divellomedia （Chibrikova） Burgess et Richardson,Dyadospora murusdensa Strorher et Traverse and Artempoyra brevicosta Burgess et Richardson spore-pollen fossil of early Silurian in the clastic rock, them wera contradiction for the predecessor divided Wenquangou group and Dabangou group in middle-later Silurian,so afreshed confirming of early Silurian Wenquangou group.Them new demarcated Akebieerdigou group and Qiongqiate group form down to up,and them were very good prospect perspective form eutaxic iron deposit and mid-and-low temperature hydrothermal copper ore in the group.

关 键 词：西昆仑 琼恰特 早志留世 沉积环境 孢粉 

分 类 号：P539[天文地球—古生物学与地层学]