摘要
对安庆铜矿床成矿地质条件进行分析。研究结果表明:区内三叠系中统月山组(T2y)含膏盐白云质灰岩和下统南陵湖组(T1n)薄层灰岩与矿床的形成最为密切;月山岩体与围岩的不规则状接触带构造及断裂构造为最主要的控矿构造;来自于上地幔的燕山早期中酸性钙碱性月山岩体为区内的成矿母岩。岩浆带为本区提供大量的成矿物质和热能,是成矿的决定因素;构造为成矿物质的运移和沉淀提供良好的通道和场所,是成矿的必备条件;地层主要以其有利的层位、岩性为成矿物质的沉淀提供良好的空间位置。在此基础上,结合成矿物质来源、形成条件、矿石组构、蚀变分带及成矿作用等方面对矿床成因进行分析,认为矿床成因属的以接触交代作用为主、岩浆贯入作用为辅形成的矽卡岩型铜矿床。
The strata conceming ore deposit formation consists of dolomitic limestone with thin layer of gypsum of middle Triassic Yueshan group （T2y） and limestone of lower Triassic Nanlinghu group （Tin）; the ore-controlling structures are irregular contact zone between Yueshan intrusion and wall rock and faults structure; Yueshan intrusion is mineralization mother rock in this area, which was originated from upper mantle in early Yanshanian with mid-acid and calc-alkaline properties. The magma is the determinant for mineralization, brings about a lot of metallogenic fluid and metallogenic material; the structure which is a prerequisite for mineralization, provides the favorable passage and place for the migration and deposition of metallogenic material; the strata mainly with its favorable position and lithology provides favorable spatial location for metallogenic material deposition. On this basis, the genesis of deposit was researched combined with the ore-forming material, formation conditions, ore-controlling factors, ore fabrics, Alteration Zoning and mineralizing process. The results show that the Anqing copper deposit is skarn copper deposit controlled by contact metamorphism, supplemented by magma injection.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第2期626-631,共6页
Journal of Central South University:Science and Technology
基金
国土资源部公益性行业科研专项项目(200911007-04)
国家危机办项目(20109901)
全球铜矿分布规律与找矿战略区划研究项目(国土资厅发[2011]7号)
中南大学有色金属成矿预测教育部重点实验室发展基金资助项目(2008年)
关键词
岩体特征
成矿地质条件
矿床成因
安庆铜矿床
intrusion characteristics
ore-forming geological conditions
genesis of deposit
Anqing copper deposit
