摘要
霍邱铁矿田位于华北地台南缘,处于北淮阳山字型构造脊柱部位.李老庄铁矿-菱镁矿床置于霍邱铁矿田中部.该矿床主要产于新太古界霍邱群变质岩系中,矿体赋存于富镁碳酸盐中,矿石类型可以分为菱镁矿磁铁矿石和蛇纹石磁铁矿石,各占25%.成矿物质来源于变质岩系的多层、分散的含铁建造矿源层中.依据矿床地质特征,结合矿石同位素地质和测年结果,认为李老庄铁矿-菱镁矿铁矿床为一新太古代海相火山-沉积变质型矿床。
The Huoqiu iron ore field in Anhui is tectonically located in the south margin of North China platform. At the center of Huoqiu iron ore field, there lies Lilaozhuang iron-magnesite deposit, which occurs in the metamorphic rocks of Archean Huoqiu group, with ores hosted in the Mg-rich carbonate rocks. The types of ore minerals can be divided into magnesite-magnetite type and serpentine-magnetite type, accounting for 25% respectively. The major metallogenetic matters came from the multilayered dispersed iron formation in the metamorphic series. According to the geological characteristics of the deposit, combined with the ore isotopic evidences and dating data,the Lilaozhuang iron-magnesite deposit probably belongs to a Neoarchean marine volcanic sedimentary-matamorphic type of deposit.
出处
《地质与资源》
CAS
2007年第3期183-188,195,共7页
Geology and Resources
关键词
铁矿-菱镁矿床
地质特征
成因类型
霍邱
安徽省
iron-magnesite deposit
geological characteristics
genetic type
Huoqiu County
Anhui Province
