一、地质概况福建某铌钽矿为一大型稀有金属花岗伟晶岩型矿床。区内出露的伟晶岩脉均有不同程度的铌钽矿化。北矿段56、58号脉组位于矿区中部,上村复背斜西翼。矿体赋存于前震旦系麻源组第二岩性段第四亚段Pt_3my~b底部,为一单斜构造。56号脉由四个单体组成,呈右型雁列,走向近南北,北端偏转北东,倾向西—北西,倾角 First, the geological overview Fujian niobium tantalum ore is a large rare metal granite pegmatite type deposit. The pegmatite veins exposed in the area all have different degrees of niobium and tantalum mineralization. No. 56 and No. 58 pulse sets of the northern ore section are located in the middle part of the mining area and west of the anticlinal anticline of the village. The orebodies occur at the bottom of Pt_3my ~ b in the fourth sub-stage of the second lithologic stage of the former Sinian Mayuan Formation and have a monoclinic structure. The 56th pulse is made up of four monomers, showing the right type of geese, heading to the north and south, the north end deflecting northeast, the west-northwest, and the dip