浙江遂昌治岭头金银矿床硅同位素研究  

STUDY ON THE SILICON ISOTOPE OF ZHILINGTOU GOLD_SILVER DEPOSIT IN SUICHANG, ZHEJIANG PROVINCE

作　　者：章传玲[1] 姚书振[1] 王苹[1] 杨军 

机构地区：[1]中国地质大学资源学院

出　　处：《地球科学（中国地质大学学报）》1998年第5期499-502,共4页Earth Science-Journal of China University of Geosciences

基　　金：浙江省遂昌治岭头矿区联合勘查指挥部项目资助

摘　　要：通过对浙江遂昌治岭头金银矿床的硅同位素组成特征研究，得出以下结论：（１）不同成因类型金矿床（化）中载金石英的δ（３０Ｓｉ）值具有一定的差异．其中变质热液型金矿化中的弱黄铁矿含金石英脉的δ（３０Ｓｉ）值为－０．１‰；叠加成因的硅化蚀变岩型和石英脉型第一成矿阶段的δ（３０Ｓｉ）值为－０．２‰；岩浆热液型含金石英脉为－０．４‰；（２）不同成因类型的围岩中石英的δ（３０Ｓｉ）值，差异也十分明显．其中斜长片麻岩的δ（３０Ｓｉ）值为－０．１‰，与变质分异作用形成的无矿石英脉一致；酸性火山岩－次火山岩中，石英的δ（３０Ｓｉ）值为－０．３‰，属岩浆成因．上述δ（３０Ｓｉ）值的变化规律，具有示踪意义，为有效地判别硅质来源，合理地解释该矿床的成因问题，提供了有力证据．The study of the silicon isotope characteristics of Zhilingtou gold_silver deposit in Suichang, Zhejiang Province enables the authors to form the following conclusions. There are certain differences between δ ( 30 Si) values of loading_gold quartz in different genesis_types of the gold deposit or gold mineralization. The δ ( 30 Si) value of weak pyrite mineralize_containing gold quartz vein is -0.1‰ in metamorphic hydrothermal type deposits and the δ ( 30 Si) value of sicicification_altered rock types and first ore_forming stage of quartz veined gold deposits is -0.2‰ in telescoping genesis gold deposits. The δ ( 30 Si) value of containing gold quartz vein is -0.4‰ in magma_hydrothermal types of gold deposits. There are obvious differences between the δ ( 30 Si) values of quartz in different genesis wallrocks. The δ ( 30 Si) value of plagioclase genesis is -0.1‰ in accordance with quartz vein of metamorphic differentiation genesis and the δ ( 30 Si) value of quartz in acid volcanic rocks and sub_volcanic rocks is -0.3‰. The variation of the silicon isotope value is of certain significance for the source of silicon and the judgement of genesis and the solution to genesis of gold deposit.

关 键 词：金矿床 银矿床 硅同位素 硅质来源 

分 类 号：P618.510.4[天文地球—矿床学] P618.520.4[天文地球—地质学]