胶西北郭家店幔枝构造区控矿断裂形成机制  

Formation Mechanism of Ore-controlling Faults of Guojiadian Mantle Branch Structure Area in Northwest Shandong

作　　者：牛树银[1,2] 孙爱群[1] 张建珍[1] 王铮[1] 张福祥[1] 刘成[1] 张晓飞[1] 

机构地区：[1]石家庄经济学院资源学院,河北石家庄050031 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《黄金科学技术》2012年第4期90-95,共6页Gold Science and Technology

基　　金：公益性行业科研专项经费项目"我国典型金属矿科学基地研究"(编号:200911007)和"中国地国质调查局危机矿山研究"(编号:20089948;20109901)联合资助

摘　　要：胶西北地区黄金储量巨大,成矿时间集中(115±5 Ma),并且主要展布在三山岛、焦家和招平等3条主干断裂带上。研究认为,该区金矿之所以如此集中,与深部莱阳地幔亚热柱及其郭家店幔枝构造的形成与演化密切相关。深源Au元素以气态—气液混合态—含矿流体的形式,通过地幔热柱—地幔亚热柱—幔枝构造迁移到幔枝构造外围的韧—脆性剪切带、侵入岩体的内外接触带、密集的构造裂隙带及各种脉岩与围岩的接触带等有利构造扩容带集聚成矿,形成不同类型的矿田—矿床—矿体(脉)的有序排列组合。The gold reserve is huge,ore-forming time concentration （115__＋5 Ma） and mainly distributes in San- shandao,Jiaojia and Zhaoping three main fault belt in Northwest Shandong area.Research thinks,gold deposit in the area is so concentrated,is closely related to the evolution of deep Laiyang sub-mantle plume and its Guojiadi- an mantle branch structure formation.Gold element of deep source in gas-gas liquid mixed state-ore-bearing fluid form,through the mantle plume to sub-mantle plume and mantle branch structure,migration into the mantle branch structure outside of the ductile brittle shear zones, intrusive rocks, within the outer contact zone,intensive tectonic fracture zone,a variety of vein rock and surrounding rock contact with favorable tectonic expansion belt agglomeration ore,form ordered permutation and combination of different types of orefield-deposits -orebodies （ veins ）.

关 键 词：亚热柱 幔枝构造 控矿构造 成矿作用 胶西北地区 

分 类 号：P618.51[天文地球—矿床学]