摘要
山东省莒县马家峪钛铁矿属岩浆结晶分异型矿床。成矿母岩与矿体均为新太古代辉长岩,矿体与围岩磁性差异明显。矿区共圈定钛铁矿矿体2个,均呈近东西向不规则透镜状产出。主矿体规模600m(走向)×500m(倾向),矿体平均品位为mFe+TiO26.43%,品位变化系数为11.71%,属品位变化均匀型矿体。两矿体平均品位为mFe+TiO26.41%,新增(332)+(333)钛铁矿资源量2751.1万t,其中(332)类资源量1437.1万t,(333)类资源量1314.0万t。矿石中SiO2含量43.73%~47.46%,平均46.05%,总体小于45%,属基性岩类。K2O+Na2O=3.13%~6.18%,平均4.66%,K2O/Na2O=0.25~0.60,平均0.43,Na2O>K2O,镁铁比值M/F=0.18~0.54<2,属富铁镁质基性岩。矿体中有用组分均匀。矿石中的其它有益组分,均未达到伴生标准。有害组分含量较低,对矿石质量无影响。矿床规模中等,形态简单,易于开采,找矿标志明显。
Majiayu ilmenite deposit in Juxian County of Shandong Province belongs to magmatic crystallization and differentiation deposit.The orebodies occur in gabbros of Neoarchean Yangjiazhai unit.Two ilmenite orebodies have been circled as occurrences trending E-W.The scale of main orebody is 600 m(strike)×500 m(dip),the average grade of mFe+TiO 2 is 6.43%,and quality coefficient of variation is 11.71%,indicating it is a deposit with even ore grade changes.The average grade of two ilmenite orebodies is 6.41%.Newly added resource amount of the two orebodies with the type of(332)+(333)is 2 751.1×10^4 t,of which type(332)resource is 1 437.1×10^4 t,type(333)resource is 1 314.0×10^4 t,respectively.The content of SiO 2 in ores is 43.73%~47.46%,averaging at 46.05%,which is less than 45%,and belongs to the basite.K 2 O+Na 2 O=3.13%~6.18%,averaging at 4.66%,K 2 O/Na 2 O=0.25~0.60,averaging at 0.43,Na 2 O>K 2 O,M/F=0.18~0.54<2,indicating a ferromagenous composition.The useful components in the orebody are homogeneous.Other beneficial components in the ore did not reach the associated standards.Low levels of harmful components have no effect on ore quality.The deposits are medium in size,simple in shape,easy to mine,and have obvious prospecting signs.
作者
周永刚
ZHOU Yonggang(No.1 Institute of Geology and Mineral Resources of Shandong Province,Jinan 250014,China)
出处
《山东理工大学学报（自然科学版）》
CAS
2019年第5期58-62,共5页
Journal of Shandong University of Technology:Natural Science Edition
关键词
钛铁矿
矿床地质特征
找矿标志
山东莒县
ilmenite deposit
geological characteristics
prospecting indicators
Juxian County of Shandong Province
