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地质概述 李家堡子花岗伟晶岩型富钽矿床位于铁岭背斜南缘与太子河向斜的衔接部位。区内主要出露前震旦系、震旦系及侏罗系地层。前展旦系主要由斜长角闪岩、角闪斜长片麻岩组成,局部夹有角闪岩、黑云母片岩等,构成古老基底。矿区东南部大面积分布着混合花岗岩,普遍见有绿帘石化,局部见有白云母化和钠长石化。混合花岗岩与前震旦系斜长角闪岩接触界线清楚,并部分被中生代侏罗系火山岩所覆盖。 本区构造活动不太发育,仅见有花岗伟晶岩脉贯入于震旦系变质岩中。目前,区内共发
Geological Overview Lijiapuzi granite pegmatite-rich tantalum ore deposit is located in the southern edge of Tieling anticline and Taizihe syncline junction. The area is mainly exposed before Sinian, Sinian and Jurassic strata. The foreshortensite is mainly composed of amphibolite and amphibole gneiss, with amphibolite and biotite schist being partially embedded in it to constitute the ancient basement. A large area of southeastern ore mined with mixed granite, generally see the green curtain petrochemical, local see michanization and albite. The boundary between the mixed granites and the former Sinian amphibolite is clear and partially covered by Mesozoic Jurassic volcanic rocks. The tectonic activities in this area are not well developed. Only the granitic pegmatite veins penetrated Sinian metamorphic rocks. Currently, the region co-sent