山东省沂水县下儒林钛铁矿矿床地质特征

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

下儒林钛铁矿位于沂沭断裂带内汞丹山凸起的东部边缘，浮来山一白粉子断裂的西侧。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％；TiO：含量一般为5％-8％，最高为10。13％，矿床平均为6．54％。矿石中TiO：与TFe含量变化呈正相关关系。

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.