Daughter minerals in fluid inclusions of garnet and diopside from Tongguanshan Copper Deposit by SEM／EDS and LRM
Daughter minerals in fluid inclusions of garnet and diopside from Tongguanshan Copper Deposit by SEM／EDS and LRM
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发表时间：
2004
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通讯作者：
YulingXie;JiuhuaXu;ZengqianHou;ZhusenYang;WenyiXu;YifengMeng;BaohuaWang
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作者：
YulingXie;JiuhuaXu;ZengqianHou;ZhusenYang;WenyiXu;YifengMeng;BaohuaWang
铜陵大矿带铜官山铜矿床是典型的矽卡岩型铜矿床之一。通过在显微镜下仔细观察，在石榴石和透辉石的流体包裹体中区分出了许多透明子矿物和不透明子矿物。 SEM/EDS（扫描电镜/能谱仪）和LRM（激光拉曼探针）分析结果表明，石榴石中的子矿物为钾盐、岩盐、闪锌矿、黄铜矿和碳酸盐。钾盐子矿物在石榴石和透辉石中非常受欢迎。流体包裹体中大量钾盐子矿物及其他子矿物的存在，表明成矿流体具有超高盐度和高钾浓度。流体包裹体中钾浓度较高，与该地区广泛发生的富钾介型酸性岩和钾硅酸盐蚀变相一致。石榴石和透辉石的子矿物组合与矽卡岩阶段之后的成矿阶段的矿物组合相似。
Tongguanshan copper deposit of Tongling large ore belt is one of the typical skarn copper deposits. Based on careful observation under microscope many daughter minerals including transparent ones and opaque ones have been distinguished in the fluid inclusions of garnet and diopside. The results of SEM/EDS (scanning electron microscope/energy dispersive spectrometer) and LRM (laser Raman microprobe) analysis show that these daughter minerals in garnet are sylvite, halite, sphalerite, chalcopyrite and carbonate. Sylvite daughter mineral is very popular in garnet and diopside. The existence of so much sylvite daughter mineral and other daughter minerals in the fluid inclusions indicates that the ore-forming fluid is of supper-high salinity and high potassium concentration. High potassium concentration in the fluid inclusions agrees with K-rich mesotype-acid rock and K-silicate alteration that occurred widely in this area. The daughter mineral assemblage in garnet and diopside is similar to the mineral assemblage of oreforming stage that followed skarn stage.