华北板块南缘熊耳群火山岩系中的杏仁体——热水成矿作用的证据  

Amygdales in the volcanic series of the Xiong'er Group on the southern margin of the North China plate:evidence of hydrothermal mineralization

作　　者：张汉成[1] 肖荣阁[1] 安国英[1] 张龙[1] 侯万荣[1] 高亮[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《地质通报》2003年第5期356-363,共8页Geological Bulletin of China

基　　金：国家自然科学基金项目(编号:40073013);国土资源部自由探索项目(编号:2000440)资助。

摘　　要：在华北板块南缘熊耳群火山岩的矿化部位,普遍存在着特征明显的杏仁体,有的杏仁体甚至构成了矿化体,前人对此研究很少。对杏仁体的结构、构造特征及充填矿物进行了系统研究,详细论述了杏仁体的形成机制及其与成矿热水流体和成矿作用的关系,指出杏仁体是在华北板块南缘熊耳群火山岩内进行找矿勘查的重要标志。Amygdales with distinct features are prevalent in mineralized sites in the Xiong'er Group vol-canic rocks on the southern margin of the North China plate.Some amygdales even have developed into mineralized bodies.However,previously this phenomenon was less studied.Based on a systematic study of the textures and structures of amygdales and their filling minerals,the formation mechanism of amygdales and their relationships with hydrothermal ore fluids and ore-forming processes are discussed in details in the paper.Finally,the authors point out that amygdales are an important indicator of exploration in the Xiong'er Group volcanic rocks on the southern margin of the North China plate.

关 键 词：华北板块南缘 熊耳群火山岩 杏仁体 热水流体 充填作用 交代作用 

分 类 号：P588.14[天文地球—岩石学] P611[天文地球—地质学]