DOI:
矿床地质:1991,Vol.>>Issue(1):71-80

邯邢铁矿的蚀变矿化
北京大学地质学系
Alteration-mineralization of skarn iron deposits in Hanxing(Handan-Xingtai)area
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中文摘要:邯邢地区矽卡岩铁矿的蚀变矿化包括三个阶段:石榴石-辉石阶段,形成矽卡岩;石英-铁氧化物阶段,沉淀大量磁铁矿,矽卡岩发生绿泥石化和绿帘石化,石英一硫化物阶段,伴随着石英、绿泥石、透闪石、蛇纹石和方解石蚀变,有少量黄铁矿和黄铜矿等形成。详细的岩矿工作结合着流体包裹体和稳定同位素研究,对石榴石、透辉石、磁铁矿和方解石沉淀时的温度、压力、矿液组分、χCO2H2O、δD、δ18O、δ13C和fO2等作了估计。
Abstract:Hanxing area is a famous skarn iron metallogenic province in China. The alteration-mineralization event of the skarn iron deposits in this area included three stages: (1) garnet-pyroxene stage, during which magmatic hydrothermal fluids reacted upon limestone(marble), forming skarn dominated by andradite and diopside, (2) quartz-iron oxide stage, following the formation of the garnet-pyroxene skarn and accompanied by the hydrous alteration of early minerals; during this stage large amounts of magnetite, hematite, quartz and epidote precipitated; (3) quartz-sulfide stage, during which sulfides precipitated after the deposition of iron oxides, and the mineral assemblage of quartz, chlorite, tremolite, serpentine, calcite, pyrite and chalcopyrite was formed.Through detailed field investigation and laboratory analysis and determination combined with fluid inclusion and stable isotope studies, we estimated temperature, pressure, composition, XCO2/XH2O, salinity, δD,δ18O, δ13C and fO2 of hydrothermal fluids in the process of alteration-mineralization, and the data obtained are given in the text.
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引用文本:
冯钟燕,赖勇.1991.邯邢铁矿的蚀变矿化[J].矿床地质,10(1):71~80
.1991.Alteration-mineralization of skarn iron deposits in Hanxing(Handan-Xingtai)area[J].Mineral Deposits10(1):71~80
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