摘要点击次数: 5542 全文下载次数: 3408 点此下载全文
Abstract:As a part of Circum-Pacific megametallogenic belt, East China seems to be the most important metallogenic province in China. There exist in East China decades of world-class tungsten, tin, bismuth, beryllium, copper, molybdenum, REE, antimony, uranium and lead-zinc deposits together with numerous large clusters of other metallic deposits, mostly formed in Mesozoic. Based on the collection, discrimination and analysis of the radiometric data available, it is prelminarily considered that the large-scale metallolgeny in East China occurred from 160×l06 to ll0×l06 a. Based on tectonic evolution, the authors propose that the gold deposits in west Qinling were developed in the extensional post-collision setting between North China craton and Yantzecraton. The granite-related coppermolybdenum deposits were formed in Early to Middle Jurassic transitional period from compression to extension, whereas W-Sn-Pb-Zn-Sb-Hg-Au-Ag-U mineralization took place in Late Jurassic and Early to Middle Cretaceous, corresponding to the period of large-scale delamination of the lithosphere. Though occurring in different genetic types and mineralization associations, these deposits are closely related to tectospherethermal erosion.
.2000.A preliminary study on time limits and geodynamic setting of Large-scale metallogeny in east China[J].Mineral Deposits19(4):289~296