矿床地质2013，Vol.32Issue(1)：20-36,17.
新疆祁漫塔格巴什尔希钨锡矿床流体包裹体地球化学研究
Fluid inclusion geochemistry of Bashierxi tungsten-tin deposit in Qimantag area, Xinjiang
摘要
Abstract
The Baiganhu W-Sn orefield consists of Kekekaerde, Baiganhu, Bashierxi and Aware deposits. Of these deposits, the Bashierxi W-Sn deposit is under exploration. Fluid inclusion microthermometry indicates that the ore-forming fluid of the Bashierxi W-Sn deposit is of the H2O-CO2-NaC1 system. The fluid inclusions in hy-drothermal quartz veins have 3 types: rich CXVbearing inclusions, aqueous inclusions and rare hypersaline inclusions. The ore-forming fluid is characterized by a wide homogenization temperature range, varying from 260? to 440? and concentrated between 300? and 380? , low salinity (generally varying in the range of 4% ~ 12%), x(CO2)of 0.043%-0.595%, relative density of CO2 about 0.74-0.84 g/cm3, relative density of H2O 1.02 ?1.10 g/cm3 and fluid pressure 80~160 MPa. All these properties of fluid inclusions are similar to features of some tungsten deposits abroad. The evolution of fluid inclusion underwent three stages: pre-mineralization stage, mineralization stage and post-mineralization stage, with each stage reflecting different trends of evolution. In general, the homogenization temperature and salinity of fluid inclusion decreased from the pre-mineralization stage to the post-mineralization stage. An analysis of H-0 isotope reveals that the hydrother-mal fluid was mainly of magmatic hydrothermal fluid at the W-Sn mineralization stage, mixed with meteoric water at the sulfide mineralization stage. According to the relationship between the properties of inclusions, the pressure of inclusions is positively correlated with the homogenization temperature, and the vapor ratio has a significant impact on the x (CO2)关键词
地球化学/流体包裹体/钨锡矿床/巴什尔希/白干湖矿田/祁漫塔格/东昆仑Key words
geochemistry, fluid inclusion, tungsten-tin deposit, Bashierxi, Baiganhu orefield, Qimantag, East Kunlun分类
天文与地球科学引用本文复制引用
丰成友,于淼,李大新,李国臣,周安顺,李鑫..新疆祁漫塔格巴什尔希钨锡矿床流体包裹体地球化学研究[J].矿床地质,2013,32(1):20-36,17.基金项目
本文得到国家自然科学基金项目(批准号:41172076)、中国博士后科学基金项目(编号:20090460132)、中国地质调查局地质调查项目(1212011085528)和中国地质调查局青年地质英才计划(201112)的联合资助 （批准号:41172076）
