摘要
中酸性岩浆侵入体隐蔽爆破作用形成角砾岩体(筒)的同时于其中形成隐爆角砾岩型金矿床。侵入岩体规模一般较小,岩性主要为闪长岩类、石英(二长)斑岩类或正长岩类的中酸性岩石。角砾岩体在平面上呈近圆形或椭圆形,面积相对较小,在剖面上呈垂直地表的筒状,深部一般与中酸性侵入岩体相连。角砾的成分在浅部多为围岩角砾,往深部逐渐变为以花岗质角砾为主,胶结物主要是细岩屑和蚀变矿物。中酸性侵入体是矿床的成矿母岩,隐爆作用的发生及形成的隐爆角砾岩体(筒)是容矿构造,角砾岩体中的次级断裂是控矿构造,各因素对于此类型金矿床的形成起着重要的作用。
The intermediate-acidic magmatic cryptoexplosion generates the breccia （pipe）in which the cryptoexplosion breccia type gold deposit emerges during intrusion or later time. Generally, the intrusions is small and lithologic composions mainly include diorite, adamellite or syenite. The breccia appears approximate circles or oblongs in the plane with the relative minor areas, pipes in the section with the vertical dip and continuity to the deep intrusion. The breccia chiefly consists of wall-rock breccias in the shallow position but gradually changing into the granitic breccias with the increasing depth. The debris and altered minerals form the cements. The intermediate-acidic intrusions are host rock, cryptoexplosion with the cryptoexplosion breccia（pipe）make up the host structures and secondary fractures in the breccia（pipe）come into being the controlling structures. These factors play an important part in the course of this type gold deposit metallization.
出处
《地质找矿论丛》
CAS
CSCD
2006年第1期15-18,共4页
Contributions to Geology and Mineral Resources Research
基金
中国黄金集团公司研究项目资助
关键词
隐爆角砾岩型金矿床
成矿特征
矿床成因
cryptoexplosion breccia type gold deposits
metallogenic character
origin of ore deposit
