天柱大河边—新晃重晶石矿床矿物组成特征的电子探针研究  

EMP STUDY OF EARLY CAMBRIAN BARITE DEPOSITS IN EASTERN GUIZHOU,CHINA

作　　者：夏菲[1] 马东升[1] 潘家永[1] 陈少华[2] 曹双林[1] 孙占学[2] 刘成东[2] 郭国林[2] 

机构地区：[1]南京大学内生金属矿床成矿机制研究国家重点实验室,江苏南京10093 [2]东华理工学院,江西抚州344000

出　　处：《矿物学报》2005年第3期289-294,共6页Acta Mineralogica Sinica

基　　金：国家自然科学基金(批准号:402320204027208040376043);国家重点基础研究发展规划项目(批准号:G1999043210)

摘　　要：通过对天柱大河边—新晃重晶石矿床系统的剖面勘查和采样分析,对矿石和围岩进行了系统的电子探针研究,发现在该矿床的矿石中广泛分布有钡冰长石。在研究钡冰长石及其共生矿物(重晶石、黄铁矿等)的化学组成、光学性质及其相互关系的基础上,对钡冰长石的成因进行了分析,进而对矿床的成因作了进一步探讨,为天柱大河边-新晃重晶石矿床热水沉积成因提供了新的证据。Based on the election microprobe （EMP） analyses of barite ore and host rocks of the Dahebian and Xinhuan barite deposits in eastern Guiahou, China, the paper reports hyalophane for the first time in the barite deposits, which is a typical low-temperature mineral, and its origin was analyzed based on its chemical composition, optical characters and correlation. Moreover, the paper deals with the genesis of the Dahebian and Xinhuan barite deposits. The study provides mineralogical evidence for the submarine hydrothermal exhalative genesis of the Dahebian and Xinhuan barite deposits.

关 键 词：钡冰长石 热水沉积 天柱大河边—新晃重晶石矿床 电子探针 重晶石矿床 共生矿物 组成特征 大河 沉积成因 冰长石 

分 类 号：P619.251[天文地球—矿床学] P575.1[天文地球—地质学]