新疆彩霞山铅锌矿床流体包裹体研究  

Fluid Inclusions of Caixiashan Pb-Zn Deposit in Xinjiang

作　　者：高晓理[1] 彭明兴[2] 胡长安[2] 王登红[3] 梁婷[1] 高景刚[1] 

机构地区：[1]长安大学地球科学与国土资源学院,陕西西安710054 [2]新疆维吾尔自治区地质矿产勘查开发局第一地质大队,新疆昌吉831100 [3]中国地质科学院矿产资源研究所,北京100037

出　　处：《地球科学与环境学报》2006年第2期25-29,共5页Journal of Earth Sciences and Environment

基　　金：中国地质调查局项目(200420190004);新疆地质矿产勘查开发局项目(XGMB2004001)

摘　　要：应用均一法、激光拉曼显微探针法研究彩霞山铅锌矿床的流体包裹体,发现其类型主要有单相盐水溶液包裹体、气液两相盐水溶液包裹体两类,测得均一温度为180℃~310℃,最佳成矿温度为190℃~220℃,属中低温矿床,代表矿区主要的成矿阶段。测得包裹体的冰点温度为-23.2℃^-0.8℃,盐度为1.4%~23.18%。气液两相包裹体中液相成分以水为主,气相成分以二氧化碳为主,单液相包裹体中成分为w(H2O)>w(CO2)。再据分馏方程计算得到热液水δ(18OH2O)为7~8。结果表明,矿床的形成与岩浆活动有关,矿床成因应划归于与中酸性侵入岩浆活动有关的中低温热液脉状矿床。The fluid inclusions of Caixiashan Pb-Zn deposit are studied by Homogenization Method and Laser Raman Method. The systematical study shows that fluid inclusions in ores include two types： single-phase liquid inclusions （LH2O ） and two-phase liquid-vapor inclusions（LH2O ＋VH2O ）. Determination of homogenization temperatures of fluid inclusions indicates that metallogenetic temperatures of the deposit, ranging from 180 ℃ to 310℃ （usually 190℃ to 220 ℃）, is low to moderate. Freezing process shows that freezing temperatures is from -23.2 ℃to -0.8 ℃, and the numerical table of freezing temperaturessalinity （Bodnar, 1992） shows that salinity NaCl is from 1.4 % to 23.18 %. The liquid components of two-phase liquid-vapor inclusions is rich in H2O and gas components is rich in Ca O, components of single-phase liquid inclusions shows that H2O〉C2O. The δ^18OH2O values from 7 - 8 by Distillation Equation. The re suits indicate that the forming of the mineral deposit relates to magmation. The mineral deposit should be of low to-mod erate-temperature hot liquid origin relevant to acid intermediate intrusive magmation.

关 键 词：流体包裹体 彩霞山铅锌矿床 均一温度 盐度 新疆 

分 类 号：P618.4[天文地球—矿床学]