地质与勘探2018，Vol.54Issue(1)：20-30,11.
冀东水厂沉积变质型铁矿床流体包裹体特征
Characteristics of the Fluid Inclusions from the Shuichang Sedimentary Metamorphic Iron Deposit in Eastern Hebei Province
摘要
Abstract
The Shuichang deposit is a typical sedimentary metamorphic iron deposit with a large scale in eastern Hebei Province. The orebodies are hosted in metamorphic rock series of Late Archaean. The fluid inclusions in quartz from different types of iron ores were analyzed by systematical petrogra-phy characteristics and tested by microscopic temperature measurement for investigating the physical properties of metamorphic fluids. The results show that there are five types of fluid inclusions in the Shuichang iron ores:type-I secondary fluid inclusion,type-Ⅱfluid-rich two-phase inclusion,type-Ⅲ gas-rich two-phase inclusion,type-Ⅳdaughter mineral-bearing three-phase fluid inclusion,and type-ⅤCO2-rich three-phase fluid in-clusion. Among them,type-Ⅲand type-Ⅴ-type ones were formed during the metamorphic culminating period,when the homogenization temperature of the metamorphic fluids was 377~ >580℃,with salinity of(0.35wt% ~9.73wt%)NaCleqv,indicating that the metamorphic fluid is characterized by high temperature and low salinity. Type I,Ⅱ and Ⅳ inclusions were formed after the metamorphic peak stage, during which the fluid homogenization temperature and salinity were 101~537℃ and(0.88wt% ~20.07wt%)NaCleqv,respectively,showing broad ranges. The characteristics of fluid inclu-sions combined with other geologic evidence reveal that the Shuichang iron ores were reformed by metamorphism after their formation and probably have a feature of multiple periods.关键词
流体包裹体/均一温度/盐度/水厂铁矿/沉积变质型铁矿/冀东Key words
fluid inclusion/homogenization temperature/salinity/Shuichang iron deposit/sendimentary metamorphic iron deposit/eastern Hebei Province分类
天文与地球科学引用本文复制引用
李晶,许英霞,刘殿龙,郭勃巍..冀东水厂沉积变质型铁矿床流体包裹体特征[J].地质与勘探,2018,54(1):20-30,11.基金项目
河北省自然科学基金项目:冀东马城铁矿床地球化学特征及其对沉积变质作用和矿床成因的约束(编号:D2016209397)资助. （编号:D2016209397）
