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新疆阿尔泰南缘乌吐布拉克铁矿成矿机制研究/Study on the ore-forming mechanism of the Wutubulake iron deposit in the southern of Altay,Xinjiang[J]
Authors
CHAI FengMei
GENG XinXia
+18 more
JIANG LiPing
LIU Feng
Lü ShuJun
OUYANG LiuJin
YANG FuQuan
ZHANG ZhiXin
中国地质大学地球科学与资源学院,北京,100083
中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京100037
中国科学院新疆生态与地理研究所,新疆矿产资源研究中心,乌鲁木齐830011
刘锋
吕书君
姜丽萍
张志欣
新疆大学地质与勘查工程学院,乌鲁木齐,830046
杨富全
柴凤梅
欧阳刘进
耿新霞
Publication date
1 January 2012
Publisher
Abstract
乌吐布拉克中型铁矿床赋存于上志留统-下泥盆统康布铁堡组变质火山-沉积岩系中,矿体呈似层状、透镜状,矿体及其周围发育大量矽卡岩矿物组合.早期矽卡岩阶段包裹体均一温度为256~534℃,盐度为11.90% - >73.96% NaCleqv,密度为0.56 ~0.96g/cm3,表明成矿流体为高-中温、高-中盐度、高-中密度的NaCl-H2O体系;退化蚀变阶段包裹体均一温度为188~313℃,盐度为12.30%~>39.76% NaCleqv,密度为0.83 ~ 1.05g/cm3,表明成矿流体为中温、中-低盐度、高-中密度的NaCl-H2O体系.石英-硫化物-碳酸盐阶段包裹体均一温度为162 ~ 320℃,盐度为2.90%~15.57% NaCleqv,密度为0.70~1.02g/cm3,成矿流体为NaCl-H2O-CO2±CH-4或N2型流体.石榴子石氢氧同位素表明早期矽卡岩阶段成矿流体主要来源于岩浆水,石英及方解石的氢氧同位素暗示石英-硫化物-碳酸盐阶段存在低温、低盐度的大气降水的加入.方解石的碳、氧同位素表明流体中碳主要来自深部岩浆.硫化物硫同位素表明硫来源于岩浆硫.成矿机制可能为早三叠世岩浆热液交代上志留-下泥盆统康布铁堡组火山岩形成矽卡岩矿物,在矽卡岩退化蚀变过程中形成铁矿体
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Last time updated on 29/11/2016