摘要
虽然我国铅锌矿床在各地质时代均有分布、类型较齐全、成矿作用复杂多样,但成矿地质时代及成矿期相对集中,研究矿石矿物特征对分析矿床成因、成矿作用以及找矿工作都有一定的帮助。通过对荒田铅锌矿矿石矿物特征的系统研究表明,硫化矿中金属矿物主要为闪锌矿及方铅矿,脉石矿物主要为石英、方解石及白云石;氧化矿石中金属矿物以菱锌矿、白铅矿及异极矿为主,脉石矿物主要为石英。根据矿床地质特征、矿物共生组合以及矿物穿插交代关系等,确定了主要矿物的生成顺序,并将矿床划分为火山沉积期、热液硫化物期和表生期,其中热液硫化物期为主要成矿期,此外闪锌矿-方铅矿阶段的成矿温度为226~290℃之间,属中温热液成矿。因此,荒田铅锌矿床属火山沉积-岩浆期后热液叠加改造成因。
Although Chinas lead - zinc deposits are distributed in various geological age with completetype and complex mineralization, the metallogenic epoch and mineralization period are relativelycentralized. Thus the study on ore mineral characteristics is of assistance for analysis of depositgenesis, mineralization and prospecting work. Through systematic study of ore mineral characteristicsof Huangtian lead - zinc deposit, it is found that main metal minerals of sulfide ore aresphalerite and galena, and main gangue minerals are quartz, dolomite and calcite; main metal mineralsof oxidized ore are smithsonite, hemimorphite and cerussite, and main gangue mineral isquartz. According to geological features, mineral association and mineral metasomatic relations, thegeneration sequence of main minerals is determined and divided into volcanic sedimentary stage,hydrothermal sulfide stage and supergene stage. Hydrothermal sulfide stage is the main mineralizationstage. In addition, mineralization temperature of sphalerite - galena stage is about 226 ~ 290°C , which belongs to mineralization of middle temperature hydrothermal fluid. Therefore, Huangtianlead - zinc deposit is the result of volcanic sedimentation and postmagmatic hydrothermal transformation.
出处
《矿产保护与利用》
北大核心
2016年第4期13-17,共5页
Conservation and Utilization of Mineral Resources
基金
国家自然科学基金项目(41363002)
关键词
矿石矿物特征
成矿期次
荒田铅锌矿
ore mineral characteristics
mineralization stage
Huangtian lead - zinc deposit
