湖南锡矿山锑矿床萤石地质特征及成因

Geological Characteristics and Genesis of Fluorite in Xikaungshan Antimony Deposit

湖南锡矿山锑矿床享有"世界锑都"之称,其矿床成因仍存较大争议.为了查明矿床成因,文章初步总结了锡矿山矿区热液成因萤石的基本地质特征,探讨了矿床成矿流体来源.研究表明,锡矿山矿区萤石一类呈浸染状产于页岩裂隙面,另一类与石英、辉锑矿共生,呈脉状、网脉状充填于硅化灰岩裂隙中,均为后期热液充填产物.通过探讨与辉锑矿共生萤石成因,结合前人研究资料,表明形成萤石-辉锑矿矿石的流体具有中低温、低盐度、低密度特征,并与岩浆有关.

Xikuangshan antimony deposit in Hunan,China,which enjoys＂world antimony＂and still exists many different opinions on its source of ore fluid and ore genesis. In order to find out its preliminary mineral source,geological characteristics of hydrothermal fluorite from this deposit have been described and as well its source of ore fluid has been discussed.The research indicates that fluorite in Xikaungshan antimony deposit has two kinds,one is in fissure of shale by disseminate,the other with stibnite and quartz having a form of symbiosis is in fissure of silicified limestone by the shape of nervation and stockwork. Both of them are the products of the hydrothermal solution. Through studying the source of fluorite of the last kind,on the basis of the predecessors＇ study,show that the ore-forming fluid is characterized by low-medium temperature,low-salinity and low-density,which is related to magma.