青海锡铁山矿区滩间山群新认识  

REVISION ON TANJIANSHAN GROUP IN THE XITIESHAN MINE,QINGHAI PROVINCE

作　　者：樊俊昌[1] 李峰[2] 

机构地区：[1]西部矿业股份有限公司,西宁810001 [2]昆明理工大学国土资源工程学院,昆明650093

出　　处：《地质与勘探》2006年第6期21-25,共5页Geology and Exploration

基　　金："十五"国家科技攻关项目(编号:2003BA612A-04);西部矿业股份有限公司科技项目联合资助

摘　　要：锡铁山滩间山群是重要的含矿火山—沉积建造。基于野外地质特征、古生物组合、同位素年龄、构造—热事件和火山—沉积演化等的综合分析,文章认为滩间山群形成于早—晚奥陶世,并重新厘定了4个(构造—)岩石地层单位。新建层序反映柴北缘早古生代经历了大陆裂谷开合演化过程。Tanjianshan group distributed in the northern margin of the Qaidam basin is an important ore - bearing volcanic - sedimentary formation of the Early Palaeozoic. Combined with analyses of field geological features, palaeontological association, isotope ages, tectnno - thermal events and volcanic -sedimentary evolution, it is confirmed that Tanjianshan group, formed in the early -late Ordovician, can be divided into four （tectono - ） lithostratigraphic units. According to the new sequence of Tanjianshan group, it is also suggested that an opening -closing evolution cycle of intracontinental rife took place during Ordovician in the region.

关 键 词：滩间山群 时代 层序 锡铁山 柴达木北缘 

分 类 号：P534.4[天文地球—古生物学与地层学]