胶东招莱地区大—超大型金矿床形成的几个关键因素  

THE KEY FACTORS FOR FORMATION OF LARGE-SUPERLARGE AU DEPOSITS IN ZHAOLAI AREA, JIAODONG REGION

作　　者：罗镇宽[1] 关康[1] 余和勇 李永明[1] 

机构地区：[1]天津地质研究院,天津300061

出　　处：《地质找矿论丛》2003年第2期95-102,142,共9页Contributions to Geology and Mineral Resources Research

基　　金：国家攀登计划预选项目(95-预-25)资助。

摘　　要：　胶东招莱地区之所以能集中丰富的金矿资源是以下关键地质因素偶合的结果:1成矿地质背景是处在新太古代花岗-绿岩地体和后碰撞弧的构造环境下;2控矿断裂经历了多次韧-脆、剪切-拉张的复杂变形过程,形成了宽大的构造岩带,有利于赋存大规模矿体;3控矿断裂是复合-叠加在花岗岩的侵入接触带上,有利于矿液的活动;4根据硫、铅同位素特征及产出地质背景,推断成矿物质主要来自以新太古代绿岩为主的结晶基底;5根据氢氧同位素特征,成矿流体为大气水和岩浆水的混合流体,有利于搬运大量成矿物质;6矿床与岩脉(特别是煌斑岩脉)有密切的时间和空间关系,表明矿区是构造和岩浆活动的中心,有利于金矿床的形成;7成矿时代为燕山晚期。The abundant and concentrated Au mineral resources in Zhaolai area, Jiaodong region is the coupling effects of the following factors: ① the Neoarchean granite greenstone terane and post collision arch geological background; ② exposition of ore controling fracture to multiple ductile brittle, shearing streching deformation to form wide tectonite zones which are favourable for large scale ore bodies; ③ superimposition of ore controling fractures on contact zones of granitic bodies favourable for hydrothermal fluid activity; ④ ore materials supplied by basemental greenstorne dominated rock infered by S, Pb isotopic feature; ⑤ incorperation of meteoric water into magmatic water to form large volume flow of ore fluid and transport large volume ore materials infered by H, O isolope feature; ⑥ magmatism centered at ore district evedenced by close spatial relation between Au deposit and lamprophyre dylces favourable for formation of Au deposits; ⑦ the ore forming period coincidod with the late stage of large scale Yanshanian magmatism.

关 键 词：大一超大型金矿床 关键因素 偶合 招莱地区 山东省 

分 类 号：P611[天文地球—矿床学] P618.51[天文地球—地质学]