摘要
地幔热柱构造是地球内部热传导的基本形式，只是地球的不同演化阶段其表现形式和强度有所不同。研究表明，燕山期强烈的地幔热柱活动沟通了深部成矿物质来源，金、银等元素随地幔热柱多级演化以气态→气—液混合相向上运移，在地幔热柱演化的三级单元——幔枝构造的有利部位聚集成矿。并据幔枝构造的成矿模式提出了华北地区燕山、秦岭、太行、胶辽等主要成矿集中区都是河淮地幔亚热柱控制下的幔枝成矿系列。成矿作用均伴随有强烈的构造—岩浆活动，成矿时代多集中在２６０～１２０Ｍａ。金、银多金属矿床具明显的相似性。
Mantle plume structures is a basic form of heat transfer in inner earth.However,the shape and intensity of mantle plume show difference in different stage of evolution.Research shows that ore forming elements was facilitated,owing to strongly activity of mantle plume during Yanshan phase.These mineralization elements (such as Au and Ag),which mainly came from the core,moved up as gas and gas liquid mixture with multi stages evolution of mantle plume,precipitated and concentrated in favourable spaces of the third class tectonic unit of mantle plume-mantle branch structure.According to metallogenic model of the branch structures we put forward that main metallogenic areas of concentration (such as Yanshan,Qinling,Taihang,Jiaoliao) developed metallogenic series of mantle branch structures under the control of Hehuai sub mantle plume.All of mineralization are related to structural deformation magmatic activity.Metallogenic epoch principally concentrates in 260—120 Ma.The Au and Ag deposits evidently exist similarity,homology and anatectic character.
出处
《地质科技情报》
CAS
CSCD
北大核心
1997年第1期65-71,共7页
Geological Science and Technology Information
基金
地矿部地质找矿科技攻关项目
