辽西马家沟铌钽矿床地质特征及成因

Geological Characteristics and Genesis of Majiagou Niobium-Tantalum Deposit in Western Liaoning

马家沟铌钽矿赋存于花岗伟晶岩脉中,属花岗伟晶岩型铌钽矿床。矿体呈脉状,Nb_(2)O_(5)+Ta_(2)O_(5)平均品位为(245.48~410.18)×10^(-6)。赋矿围岩为新太古代庄头营子角闪斜长片麻岩。通过对区域地质背景和矿区地质特征、花岗伟晶岩脉特征、矿体特征、构造特征进行分析。对该矿床成因、找矿标志、找矿方向进行了初步探讨。

The Majiagou niobium-tantalum deposit occurs in the granite pegmatite vein and belongs to the Granite Pegmatite niobium-tantalum deposit.The ore-body is vein-like,and the average grade of Nb_(2)O_(5)+Ta_(2)O_(5) is(245.48~410.18)×10^(-6).The host rock is the Neoarcheann Zhuangtou Yingzi hornblende plagioclase gneiss.Through the analysis of regional geological background and geological characteristics of mining area,characteristics of granite pegmatite vein,ore body and structure,the genesis,prospecting criteria and prospecting direction of the deposit are discussed.