中国重晶石矿主要矿集区及其资源潜力探讨   总被引：2，自引：0，他引：2  

李春阳  田升平  牛桂芝 《化工矿产地质》2010,32(2):75-86

将中国重晶石矿划分为5种矿床类型[沉积型、层控(内生)型、火山-沉积型、热液型和风化(残坡积)型]、14个矿床式[大河边式、湘黔式、秦巴式、李坊式、石榴村式、南庄坪式、顶罐坡式、大池山式、铺沟式、潘村式、宋官疃式、谭子山式、镜铁山式、象州式]、9个重晶石矿集区[甘南-陕西南-鄂北沉积型、黔东-湘西-桂北沉积型、鄂西南-川东南-黔中层控(内生)型、邢台-汲县-运城层控(内生)型、安丘-临沭-含山热液型、闽西南沉积型、桂粤热液型、锡铁山-镜铁山-青铜峡火山-沉积型、桂粤琼风化(残坡积)型]。通过研究典型矿床,总结其成矿规律,建立区域成矿模式,认为沉积型、层控型矿集区是重要的重晶石潜力地区,尚有一些有待开展工作的空白区,已有老矿山深部及外围仍有找矿潜力。  相似文献   

Isotope Geochemistry of the Pb-Zn-Ba(-Ag-Au) Mineralization at Triades-Galana,Milos Island,Greece     

Robert Marschik  Tobias Bauer  Ana-Sophie Hensler  Nikos Skarpelis  Stefan Hölzl 《Resource Geology》2010,60(4):335-347

The Pb-Zn-Ba(-Ag-Au) mineralization in the Triades and Galana mine areas is hosted in 2.5–1.4 Ma pyroclastic rocks, and structurally controlled mostly by NE-SW or N-S trending brittle faults. Proximal pervasive silica and distal pervasive sericite-illite alteration are the two main alteration types present at the surface. The distribution of mineralization-alteration in the district suggests at least two hydrothermal events or that hydrothermal activity lasted longer at Galana. The Sr isotope signature of sphalerite and barite (⁸⁷Sr/⁸⁶Sr = 0.709162 to 0.710214) and calculated oxygen isotope composition of a fluid in equilibrium with barite and associated quartz at temperatures of around 230°C are suggestive of a seawater hydrothermal system and fluid/rock interaction. Lead isotope ratios of galena and sphalerite (²⁰⁶Pb/²⁰⁴Pb from 18.8384 to 18.8711; ²⁰⁷Pb/²⁰⁴Pb from 15.6695 to 15.6976; ²⁰⁸Pb/²⁰⁴Pb from 38.9158 to 39.0161) are similar to those of South Aegean Arc volcanic and Aegean Miocene plutonic rocks, and compatible with Pb derived from an igneous source. Galena and sphalerite from Triades-Galana have δ³⁴S_VCDT values ranging from +1 to +3.6‰, whereas barite sulfate shows δ³⁴S_VCDT values from +22.8 to +24.4‰. The sulfur isotope signatures of these minerals are explained by seawater sulfate reduction processes. The new analytical data are consistent with a seawater-dominated hydrothermal system and interaction of the hydrothermal fluid with the country rocks, which are the source of the ore metals.  相似文献   

萤石中流体-熔融包裹体的研究   总被引：14，自引：0，他引：14  

牛贺才  林传仙 《地质论评》1995,41(1):8-33

在四川冕宁稀土矿床霓辉重晶石伟晶岩型矿体早期萤石中笔者发现了大量的流体-熔融包裹体。矿物的光学性质及激光拉曼光谱特征表明,流体-溶融包裹体内晶体矿物为重晶石。萤石中流体-熔融包裹体的“均一化”温度为493.7—502.3℃,其捕获温度更高,这说明主矿物萤石的形成温度很高,笔者认为这类萤石是由富含挥发分,以氟化钙、硫酸钡为主要成分的盐熔体直接结晶而成的,即该类萤石以及与之共生的重晶石具有岩浆成因的特征。  相似文献