投稿时间：2018-02-10
修订日期：2018-08-06
网络发布日期：2019-01-09
中文摘要:泥堡金矿床地处黔西南碳酸盐岩台地相区，赋矿围岩主要为玄武质火山碎屑岩，以断控型矿体为主、层控型矿体为辅，是滇黔桂“金三角”地区典型的卡林型金矿床之一。详细的野外填图和研究表明，构造是其最主要的控矿要素之一。泥堡金矿区构造类型以断层和褶皱为主，构造线以北东向为主，北西向为辅。矿床受区域性的北东东向潘家庄断裂控制，但矿体主要受次一级的断层和褶皱控制，其中枢纽北东东向二龙抢宝背斜与北西向背斜叠加形成的穹窿构造是层控型金矿体的主要构造控制因素；断控型金矿体主要受控于F1逆断层，逆冲断层+上盘牵引背斜构造是泥堡金矿最典型的构造控矿组合样式。印支期造山挤压奠定了矿区北东东向的总体构造格架，燕山期叠加了北西向构造。F1虽总体表现为逆断层性质，但在燕山晚期叠加了正滑运动，并形成了张性空间，有利于的成矿流体运移和金沉淀。根据矿床构造控矿规律分析，提出F1北部的次级断层F1-1及其上盘牵引背斜为金矿有利的找矿靶区，有待今后工程验证。
Abstract:Located at the carbonate platform in southwestern Guizhou, the Nibao gold deposit is one of the typical Carlin-type gold deposits in the Yunnan-Guizhou-Guangxi golden triangle. The ore-hosting rock of the deposit is mainly basaltic pyroclastic rock, and the orebodies are mainly controlled by fault with a few layers. Based on detailed field observation and structure analysis, the authors propose the structural ore-controlling significance of Nibao gold deposit. Faults and folds are the primary structural types of the deposit, and the structural lines of the deposit are mainly classified into NE-trending and NW-trending ones. Regional Panjiazhuang fault controls the distribution of different gold deposits, while its secondary faults and folds control the location of orebodies. Among these structures, the dome structure formed by superposition of NEE trending Erlongqiangbao anticline and NW-trending anticline controls the location of bedded orebodies, while the NNE-striking thrust fault F1 controls the fault-controlling orebodies. Therefore, thrust fault and anticline comprise the ore-controlling structure of the deposit. The compressing in the Indo-Chinese epoch consisted of NEE-trending structural frame of the deposit, which underlay NW-trending structures in the Yanshanian epoch. The F1 was reactivated as a normal movement and formed an extensive setting in the later stage of Yanshanian epoch, which triggered the upwelling of ore-forming fluid and the final gold mineralization. Furthermore, the secondary NE-striking F1-1 and anticline are the prospecting targets in the Nibao gold district, while further exploration engineering evidence is required in the future.
keywords:geology structural analysis structural metallogenesis Nibao gold deposit Carlin-type gold dep
文章编号：
中图分类号：P618.51
文献标志码：
基金项目:国家自然科学基金面上项目（编号：41572072）、国家重点基础研究发展计划“973”课题（编号：2014CB440902）、中国地质调查局地调项目（编号：DD20160124）和贵州省地质矿产勘查开发局地质科研项目（编号：黔地矿科合[2016]16号）联合资助成果
引用文本：
戢兴忠,陈懋弘,刘旭,李强,谢贤洋,朱永红,韩忠华.2018.黔西南泥堡金矿床构造解析及构造控矿作用[J].矿床地质,37(6):1296~1318JI XingZhong,CHEN MaoHong,LIU Xu,LI Qiang,XIE XianYang,ZHU YongHong,HAN ZhongHua.2018.Structure analysis and structural ore-controlling role of Nibao gold deposit in southwestern Guizhou Province[J].Mineral Deposits37(6):1296~1318
图/表
