摘要
湘西北铅锌矿带属于中国16个重点成矿区带之湘西-鄂西成矿带的南西段,区内成矿地质条件优越,形成保靖、洛塔、花垣渔塘、凤凰4个矿田。文章在野外考察和室内研究的基础上,以洛塔矿田中的下光荣、江家垭等铅锌矿床、花垣渔塘矿田中的李梅铅锌矿床为例,从地层、岩性、构造等分析入手,采用同位素测试、包裹体分析等手段,对湘西北铅锌矿带的成矿地质特征及成矿机制进行了探讨,认为区内成矿物质主要来源于寒武纪地层,成矿作用过程中,油田卤水在构造作用下的大规模运移、循环,导致了成矿物质的富集和沉淀,主要成矿时代为加里东期。
The lead-zinc ore belt in northwestern Hunan is located in the southwestern segment of the western Hunan- western Hubei metallogenic belt which is one of the sixteen important metallogenic belts in China. The north- western Hunan lead-zinc ore belt consists of four orefields, i.e., Baojing, Luota, Huayuan Yutang and Fenghuang. The metallogenic geological condition of the lead-zinc ore belt is very good. Based on detailed field investigation and comprehensive studies and exemplified by the Xiaguangrong lead-zinc deposit and Jiangjiaya lead-zinc deposit in the Luota orefield as well as the Limei lead-zinc deposit in the Huayuan Yutang orefield, the authors, starting with an analysis of strata, lithology and structure and combining the isotope analysis with in- clusions geochemistry, studied the metallogenic geological characteristics and genesis of lead-zinc deposits in northwestern Hunan. The results show that the metallogenic material was mainly derived from the Cambrian strata, and the enrichment and precipitation of minerals were caused by deep hot brine mixed with oil brine dur- ing the Caledonian orogeny.
出处
《矿床地质》
CAS
CSCD
北大核心
2015年第5期1072-1082,共11页
Mineral Deposits
基金
国家自然科学基金项目(编号:41240019)
国家"高等学校特色专业建设点项目(编号:TS11027)"
湖南省国土资源厅"湘西北铅锌富集机理研究(编号:C10910)"项目资助
关键词
地球化学
铅锌矿带
成矿地质特征
矿床成因
湘西北地区
geochemistry, lead-zinc ore belt, metallogenic geological characteristics, genesis of ore deposit, northwestern Hunan
