文献类型：期刊文献

中文题名：贵州西南部峨眉山玄武岩分布区金矿找矿研究新进展

英文题名：New progress of exploration research of gold deposit in the Emeishan basalt distribution area,Southwest Guizhou Province

作者：李俊海 吴攀 刘建中 张双菊 宋威方 王大福

第一作者：李俊海

机构：[1]贵州省地质矿产勘查开发局一0五地质大队;[2]贵州大学资源与环境工程学院;[3]自然资源部基岩区矿产资源勘查工程技术创新中心;[4]喀斯特地质资源与环境教育部重点实验室;[5]贵州省地质矿产勘查开发局;[6]贵州理工学院

第一机构：贵州省地质矿产勘查开发局一0五地质大队

年份：2021

卷号：42

期号：6

起止页码：5-10

中文期刊名：黄金

外文期刊名：Gold

收录：CSTPCD

基金：国家自然科学基金项目(41802088);贵州省科技计划项目(黔科合平台人才〔2018〕5765);贵州省地质矿产勘查开发局地质科研项目(黔地矿科合〔2016〕12号)。

语种：中文

中文关键词：构造蚀变体;峨眉山玄武岩;金矿;流体包裹体;贵州西南部

外文关键词：structural alteration body;Emeishan basalt;gold deposit;fluid inclusion;Southwest Guizhou Province

摘要：贵州西南部峨眉山玄武岩分布区位于南盘江—右江成矿区北段,该成矿区成矿地质条件优越,找矿前景较好。根据黔西南地区金矿找矿建立的成矿模式,结合对已有成果的深入研究,并通过大量深部钻探工程验证,相继新发现了赋存于峨眉山玄武岩中的大麦地中型金矿床和架底大型金矿床,在贵州西南部峨眉山玄武岩分布区实现了原生金矿的重大找矿突破并取得新发现及认识:新马场背斜控制了该区金矿的分布,金矿几乎均产于新马场背斜南东翼;莲花山背斜为新马场背斜南东翼受后期牵引形成的次级褶皱,矿体主要产于莲花山背斜核部附近、南东翼系列次级揉褶带的构造蚀变体中,以及峨眉山玄武岩的层间破碎带中;成矿流体具有低温、中低盐度、低密度等特征;成矿流体中CO_(2)-H_(2)O气液两相包裹体的气相成分主要为H_(2)O,含有少量CH_(4);CH_(4)-H_(2)O气液两相包裹体的气相成分以CH_(4)为主,含少量CO_(2)。
The Emeishan basalt distribution area in Southwest Guizhou Province is located in the north of Nanpanjiang-Youjiang metallogenic area.The metallogenic geological conditions in the area are superior and the prospecting prospect is good.According to the metallogenic pattern established for gold prospecting in Southwest Guizhou,the re-study of existing research results and the verification of a large number of deep drilling projects,the Damaidi medium-scale gold deposit and the Jiadi large-scale gold deposit hosted in Emeishan basalt have been successively discovered in the Emeishan basalt distribution area in the southwest of Guizhou Province,a major breakthrough in primary gold exploration achieved.New discoveries and understandings have been obtained:the Xinmachang anticline controls the distribution of gold deposits in this area,and almost all gold deposits occur in the southeast wing of Xinmachang anticline;Lianhuashan anticline is a secondary fold,formed from the southeast wing of Xinmachang anticline under the later stage traction.The gold ore bodies mainly occurred in the structural alteration near the core of Lianhuashan anticline and in the secondary fold belt of southeast wing series,and in the interlayer fracture zone of Emeishan basalt;the ore-forming fluid is characterized by low temperature,medium-low salinity and low density;the gas phase composition of CO_(2)-H_(2)O gas-liquid two-phase inclusions in ore-forming fluid is mainly H_(2)O and minor CH_(4),while the gas phase composition of CH_(4)-H_(2)O gas-liquid two-phase inclusions is mainly CH_(4)and minor CO_(2).