山东省沂水县下儒林钛铁矿矿床地质特征

下儒林钛铁矿位于沂沭断裂带内汞丹山凸起的东部边缘,浮来山白粉子断裂的西侧。含矿岩石(矿化体)为侵入于新太古代泰山岩群中的新太古代晚期含钛磁铁矿角闪石岩,其呈透镜状或带状发育于泰山岩群中或被捕虏(残留)于古元古代吕梁期傲徕山弱片麻状中粗粒二长花岗岩内,其产状与新太古代变质地层基本一致。矿区内圈定矿体5个,矿体长240~1000m,宽14~140m。矿石TFe含量一般为15%~16%,最高为21.84%,矿床平均为15.55%;TiO2含量一般为5%~8%,最高为10.13%,矿床平均为6.54%。矿石中TiO2与TFe含量变化呈正相关关系。

Geological Characteristics of Xiarulin Ilmenite Deposit in Yishui County in Shandong Province

Xiarulin ilmenite deposit locates in east part of Gongdanshan uplift in Yishu fault belt, and west part of Fulaishan -Baifenzi fault belt. Neoarchean titaniforous magnetite amphibolites whic intruded into Neoarchean Taishan group are its major ore - bearing rock. It developed as pod and belt type in Taishan group , or trapped by medium -coarse low gneiss mozonitic granites in Aolaishan formation of Mesozoic Lvliang group. It has the same occurrence with Neoarchean metamorphic strata. 5 orebodies have been circled with the length of 204 - 1000m and the width of 14 - 140m. TFe content is 15% - 16%, average content is 15.55%, and reach 21.84% maximumly; TiO2 content is 5% - 8%, average is 6.54%, and can reach 10.13% maximumly. The content of TiO2 has direct correlation with TFe content variation.