西藏羌北地区石炭纪地层的发现  

Discovery of Carboniferous strata in northern Qiangtang basin, Tibet

作　　者：程立人[1] 陈寿铭[1] 张以春[1] 吴水忠[2] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]东北大学秦皇岛分院,河北秦皇岛066004

出　　处：《地学前缘》2006年第4期240-243,共4页Earth Science Frontiers

基　　金：中国地质调查局项目"西藏1:25万玛依岗日幅区域地质调查"(I45C003002)

摘　　要：西藏羌北地区从未发现过有可靠化石依据的石炭纪地层。在西藏1∶25万玛依岗日幅区域地质调查中,于原侏罗系分布区内,发现了一套厚度大于298·05m的以碳酸盐岩为主夹碎屑岩地层。碳酸盐岩中含丰富的Eostaffella、Pseudoendothyra、Milleralla、Ozawainella、Pseudostaffella、Profusulinella、Fusulina、Fusulinella、Triticites、Protricites等,属于典型的石炭纪分子。虽未见顶、底,但它是羌北地层分区的唯一一处有可靠化石依据的石炭纪地层,故建立瓦垄山组(C1-2w)。There have been no previous of Carboniferous strata in northern Qiangtang, Tibet based on reliable fossils. During our 1 ： 250 000 geological survey, a section of carbonate and clastic strata with a thickness of 298.05 m was discovered in an area of widespread Jurassic strata. Abundant late Carboniferous fusulinids are found in this section including Eosta f f ella , P seudoendoth yra , Milleralla , Ozawainella , Pseudosta f f ella , Profusulinella, Fusulina, FusulineUa, Triticites, and Protricites. The base of the section is not exposed. We have designated this Carboniferous section as the Walongshan formation（C1-2w） .

关 键 词：石炭纪地层 西藏羌北地区 筵类 

分 类 号：P534.45[天文地球—古生物学与地层学]