矿物包裹体成份、稳定同位素组成联测及地质应用  

Geological Application and Determination of Measure Stable Isotope with Inclusion component

作　　者：李桃叶[1] 翟丽娜[1] 刘家齐[1] 

机构地区：[1]宜昌地质矿产研究所,湖北宜昌443003

出　　处：《华南地质与矿产》2008年第2期72-76,共5页Geology and Mineral Resources of South China

摘　　要：矿物包裹体成分分析、包裹体同位素组成测试对于探索成岩、成矿物质来源、矿床成因、探讨矿床形成的物理化学条件,建立成矿模式及指导普查找矿等方面可提供重要信息和依据。但由于测定包裹体中的氢、氧、碳同位素及包裹体成分的样品要求纯度高、样品大量,这就给测试者在采样、分选单矿物等方面都造成了很大的困难,我们经过了多次反复实验结果表明:用同一份样品中进行群体包裹体中的稳定同位素的测定和包裹体成分的联测方法是可行的。我们用联测法的测试结果对不同成矿阶段析出的石英和主要成矿期结晶的巨大水晶体的核心和晶体边部环带研究表明,形成成矿作用早期结晶的石英及水晶体的核心部位包裹体形成温度、盐度高,水含量低;晚期结晶的石英及水晶体边部环带中包裹体温度、盐度则很低,而水含量高。成矿阶段早期结晶的石英和水晶体核部矿物氧及包裹体中氢、氧、碳稳定同位素测定结果表明均为岩浆水,晚结晶者则为大气降水为特征。Mineral inclusion component analysis and isotopes testing provide important information and basis for the aspects of exploring rock, origin of mineralization, discussing the physical chemistry conditions of the deposit formation, establishing mineralization mode. However, the samples for H, O, C isotopes and components in the inclusions were requested pure and abundance. The testers must conquer these difficulties in the aspect of sampling, selecting single minerals and so on. During many repeating experiments, we gained results as follows： It was feasible that the determination measure of stable isotopes and fluid inclusions component in group fluid inclusions using the same samples. We researched quartz from different mineralization phases and great Irish diamond from core to margin zone in main mineralization phase using determination measure. The research results indicated： （1）fluid inclusions in quartz forming earlier and the core of Irish diamond had higher temperature and salinity, but lower water; （2）fluid inclusions in quartz forming later and the margin zone of Irish diamond had lower temperature and salinity, but higher water; （3）there were also different results of H, O, C stable isotopes, earlier were magma water and later were atmosphere water.

关 键 词：包裹体成分 稳定同位素 联测法 地质应用 

分 类 号：P575.9[天文地球—矿物学]