赣南西港伟晶岩型钽铌锂辉石矿床地质特征及成因

矿床位于华南褶皱系之武夷山褶皱带中的中武夷山隆起区西缘南段,付坊花岗岩体西缘、会同花岗岩体北东缘与震旦纪洪山组片麻岩、片岩接触带伟晶岩密集区.矿化伟晶岩大多受NE、NW、NEE向节理控制.矿区内已发现14个矿体,它们常呈脉状,延伸40～150 m.矿石为花岗伟晶结构,似文象结构和块状、条带状构造.含锂的矿物主要为锂辉石、含铌、钽的矿物主要钽铌铁矿、铌钽铁矿.它们主要分布于分异晚期的块体带中.地球化学和同位素研究表明,该矿床为岩浆一交代花岗伟晶岩型矿床,成因上与付坊和会同岩体有关.

Characteristics and genesis of pegmatite type Nb-Ta spodumene deposit in Xigang,south Jiangxi

The deposit is located at the southwest of Wuyi upwelling region of Wuyi fold belt in the South China fold system,the pegmatite concentration districts among the west of Fufang granite,the northeast of Huitong granite,gneiss,schist of Hongshan formation of Sinian Period.The mineralized pegmatite is mostly controlled by NE,NW,NEE joints.Fourteen ore bodies have been found and occurred in vein extending deeply about 40-150m.Ores are of pegmatite granites texture,graphic and massive,banded structure.Li-bearing minerals is spodumene,Nb-and Ta-bearing minerals are niobite,tantalite which are mainly distributed in the massive belts in late period of differentiation.The research on geochemical characteristics and isotope age suggests that the deposit belongs to a magma-metasomatic pegmatite type deposit related to Fufang and Huitong granitic mass in genesis.