皖南地区天井山金矿的矿化时空结构及矿体定位规律  

Spatial and temporal structure of mineralization and ore body location law in Tianjingshan gold deposit,southern Anhui province

作　　者：陈昌明[1] 曾令高[1,2] 张均[1] 

机构地区：[1]中国地质大学资源学院,武汉430074 [2]新疆维吾尔自治区地质矿产局,乌鲁木齐830000

出　　处：《地质找矿论丛》2015年第2期199-207,共9页Contributions to Geology and Mineral Resources Research

基　　金：安徽省国土资源科技项目"皖南地区大型韧性剪切带与金成矿作用研究"(编号:2013-K-02)资助

摘　　要：天井山金矿的矿化类型有石英脉型、蚀变岩型和千糜岩型,构成复合金矿化体系,各矿化类型的成因及时空配置具有密切的内在成生联系,组合产出特征明显。主成矿期成矿演化可以划分为微量金-石英阶段、金-单硫化物-石英阶段、金-多金属硫化物-石英阶段和微量金-萤石-方解石-石英阶段。矿体主要赋存于接触带构造及其附近,呈脉状、透镜状,膨大狭缩、尖灭再现、舒缓波状产出特征明显;断裂产状变化处及裂隙发育地段易于形成厚大富矿体,矿化发育程度与基性岩脉空间关系密切。矿体总体走向NE,具有浅部NW倾向、NE向侧伏,深部SE倾向、SW向侧伏的定位规律。其空间定位产出样式可分为外接触带型、接触带型和内接触带型。Tianjingshan gold deposit is a compound Au mineralization system with multi-mineralization types, including quartz vein, altered cataclastic rock and phyllite mineralization. The mineralizations are combinedly occurred in inherent genetic relation. Evolution of the main mineralization is divided into trace gold -quartz stage, gold-mono-sulfide -quartz stage, gold -polymetallic sulfide-quartz stage and trace gold -fluorspar -calcite -quartz stage. Ore bodies are located at or near the contact zone in vein, lens character- ized by gentle wavy extension, swelling and narrowing or pinching-out. Big and rich ore body tends to be located at abrupt change of fault occurrence and densely developed fractures. Mineralization is closely re- lated to basic dyke in space and time. The ore bodies generally extend NE, dip NW and pitch NE at shal- low and dip SE and pitch EW. Spatially, location of the ore bodies is divided into outer contact zone type and inner contact zone type.

关 键 词：天井山金矿 石英脉型 蚀变岩型 千糜岩型 矿化时空结构 矿体定位规律 安徽省 

分 类 号：P613[天文地球—矿床学] P618.51[天文地球—地质学]