首页 | 本学科首页   官方微博 | 高级检索  
     检索      

中国东部大规模成矿时限及其动力学背景的初步探讨
引用本文:毛景文,王志良.中国东部大规模成矿时限及其动力学背景的初步探讨[J].矿床地质,2000,19(4):289-296.
作者姓名:毛景文  王志良
作者单位:中国地质科学院矿产资源研究所,北京,100037
基金项目:“国家 973项目,编号 :G19990 432 11”部分成果
摘    要:通过对以往金属矿床同位素年龄数据的收集、整理和分析 ,初步厘定中国东部大规模成矿作用发生的时限为 1 60× 1 0 6~ 1 1 0× 1 0 6 a。提出西秦岭地区金矿床出现于中国两大古陆后碰撞的伸展环境 ;与花岗岩有关的铜钼矿床发育于早中侏罗世由挤压向伸展环境过渡时期 ,钨锡铅锌银锑汞金铀出现于晚侏罗世—早中白垩世岩石圈大规模拆沉或减薄期间。尽管不同类型矿床形成过程有所不同 ,都与大规模构造圈热侵蚀密切相关。

关 键 词:大规模成矿作用  成矿时限  地球动力背景  中国

A preliminary study on time limits and geodynamic setting of Large-scale metallogeny in east China
Mao Jingwen,Wang Zhiliang.A preliminary study on time limits and geodynamic setting of Large-scale metallogeny in east China[J].Mineral Deposits,2000,19(4):289-296.
Authors:Mao Jingwen  Wang Zhiliang
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.
Keywords:large  scale metallogeny  metallogenic time limits  geodynamic setting  East China
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《矿床地质》浏览原始摘要信息
点击此处可从《矿床地质》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号