摘要
黄岗矿区位于大兴安岭南段成矿带的西南端.电子探针分析显示,矿区磁铁矿化学成分特征一致,FeOT含量89.34%~93.20%,平均91.44%;氧化物特征与前人划分的钙矽卡岩铁矿石整体类似.磁铁矿TiO_2-Al_2O_3-MgO、TiO_2-Al_2O_3-(MgO+MnO)、(Ca+Al+Mn)-(Ti+V)成因图解显示本区磁铁矿成因为矽卡岩型,同时具有岩浆热液成因特点,表明岩浆对成矿的影响.结合矿床地质特征,认为黄岗铁锡多金属矿床形成主要受热液与围岩的接触交代作用,矿床成因为矽卡岩型.
Huanggang Deposit is located in the southwest end of southern part of the metallic ore belt on Dahingganling. The Electron microprobe analyses show that the composition of magnetite is consistent. The FeOT content is in the range from 89.34%to 93.20%, with the average value of 91.44%. Oxide feature is similar to iron ore in calcic skarns, which has been defined. TiO2 - Al2O3 - MgO, TiO2 - A1203 - （ MgO ＋ MnO） and （ Ca ＋ Al ＋ Mn） versus （ Ti ＋ V） discriminant diagrams suggest that the genesis of magnetite be skarn type, and the magnetite shows magmatic hydrothermal feature, which suggests the influence of magma on mineralization. Considering the geological features of ore deposit, it is considered that Huanggang Sn - Fe polymetallic deposit is related to the contact metasomatic of magmatic hydrothermal and host rocks, and the genesis of the deposit is skarn type.
出处
《南方金属》
CAS
2017年第2期35-39,共5页
Southern Metals
基金
中国地质调查局中国能源与矿床资源安全支撑平台建设与动态评价项目(12120115056901)
