摘要
新元古代晋宁期是会理-东川地区铜矿的主要成矿时期,成矿时间较长,跨越了新元古代坳拉槽回返褶皱封闭阶段(1000~900M a)和地幔上涌拉张阶段(900~740M a)。在坳拉槽回返褶皱封闭阶段,南北向挤压促进了成矿元素的活化和迁移,使成矿物质重新富集。坳拉槽地幔上涌拉张阶段,辉长岩的侵入是会理-东川坳拉槽伴随Rodinia超大陆裂解的重要岩浆事件。辉长岩的侵位为成矿元素的重新活化、迁移、富集提供了强大的热动力,最终形成拉拉地区巨量金属元素的富集。
The Huili-Dongchuan aulacogen extending across Sichuan and Yunnan is an important Proterozoic copper metallogenic province in China,and the Jinningian is a major metallogenic period during the Neoproterozoic.This long period of metallogenesis spanned the folding and closure stage(1 000-900 Ma) and mantle upwelling and extensional stage(900-740 Ma) of the aulacogen.During the folding and closure stage of the aulacogen,the N-S-trending compression facilitated the reactivation and migration of the ore-forming ...
出处
《沉积与特提斯地质》
CAS
CSCD
2009年第3期84-89,共6页
Sedimentary Geology and Tethyan Geology
基金
科技部国际科技合作项目(2005DFA20063)
关键词
会理-东川
坳拉槽
新元古代
构造-岩浆事件
成矿响应
Huili-Dongchuan region
aulacogen
Neoproterozoic
tectonic-magmatic event
mineralization response