Исследование флюидных включений в минералах Олимпиадненского Au-(Sb-W) месторождения (Енисейский кряжстатья
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Дата последнего поиска статьи во внешних источниках: 9 октября 2015 г.
Аннотация:Based on microthermometric researches and Raman-spectrometry analysis of fluid inclusions in minerals of the Olympiadinskoe Au-(Sb-W) deposit located in altered rocks at the contact of quartz-carbonate-mica and mica-quartz-carbon-bearing schists of Upper Proterozouc, T-P-C characteristics of gas-liquid and essentially gaseous inclusions of geterogeneous fluids were determined. T-P parameters of the pre-ore and ore mineralization stages were estimated. Different relations of volatile components in gaseous inclusions were established. It was revealed that gaseous inclusions in quartz of metamorphic veins contain CO2 and CH4 and the relations of the volatiles depend on lithological composition of wall rocks. Similar inclusions in quartz of ore-bearing assemblages and in scheelite are characterized by the significant addition of N2 and can be considered as CH4-N2 binary system or CO2-N2 with an admixture of CO2 or CH4 respectively (10 mole%). Correlation of N2 content in fluid and Au, Sb, W concentrations in ore-bearing metasomatic rocks was found. The sources of CO2, CH4 and N2 in fluid inclusions and N2 role in the ore-forming process are discussed.