试论藏中南低速低阻层与成矿作用  

An approach to the low-velocity and low-resistivity zones in south-central Xizang and their bearings to mineralization

作　　者：李金高[1] 王全海 周祖翼[1] 李志 姚鹏[4] 杨成玉 

机构地区：[1]同济大学,上海200092 [2]中国地调局西南项目办,四川成都610082 [3]西藏地勘局,西藏拉萨850000 [4]成都地质矿产研究所,四川成都610082 [5]华北石油局新星石油公司三普,陕西咸阳712000

出　　处：《沉积与特提斯地质》2001年第3期27-38,共12页Sedimentary Geology and Tethyan Geology

基　　金：上海市博士后科研资助计划与中国地调局"一江两河"综合研究项目联合资助

摘　　要：2 0世纪 70年代以来 ,“青藏高原热”的地学研究对地质构造、地球物理和地球化学等方面的资料和数据的积累 ,建立了青藏高原大地构造体系和特提斯喜马拉雅的形成演化模式及地壳层圈结构模式 ;2 0世纪末至今 ,喷流型矿床的发现和国土资源大调查项目的全面实施 ,使得“青藏高原”再次成为新的热点研究区。笔者试图将前人的基础地学研究成果与矿床的最新研究成果融为一体 ,进一步探讨全国重点成矿片区“一江两河”(雅鲁藏布江 ,拉萨河 ,年楚河 )成矿带的成矿动力学与矿床时空分布规律。笔者认为 ,该区地壳深部区域性展布的低速低阻层 (部分熔融状态的高温热源体 )是导致“一江两河”地区不同时代、不同成因类型矿床形成的主导因素之一。Since 1970s, numerous studies have been made on the Qinghai Xizang Plateau in southwestern China. The integration of geological, tectonic, geophysical and geohemical data led to the construction of the models for the formation and evolution of the tectonic systems on the Qinghai Xizang Plateau and in the Tethyan Himalayas. Before the turn of the century, the discovery of the sedex deposits and investigation of the national projects on geological survey have been incentive to further study of the Plateau. The metallogenic dynamics of the metallogenic zones along the Yarlung Zangbo, Lhasa and Nyangqu Rivers, and spatio temporal distribution of the ore deposits in these regions are explored, referenced to the previous and current results of research. The widespread distribution of the low velocity and low resistivity zones (partly melted high temperature heaters) is believed to be responsible for the formation of the ore deposits of varying ages and genetic types along the above mentioned rivers.

关 键 词：青藏高原 低速低阻层 成矿作用 地质构造 成矿动力学 形成演化模式 时空分布规律 

分 类 号：P611[天文地球—矿床学]