在许多分异好的花岗岩侵入体中常常见到含稀有金属矿化(锡-钨,钨-铍,钼或稀土)的脉状、不规则等轴状、透镜状和球状石英体,它们未出露地表并在深部很快尖灭。它们的规模大小变化较大:长可达几百米,而厚度可达20-30米,其中一个称为“六弦琴”(ΓΝTa-pa)(图1)的矿体,坑道揭露的深度达200米,最大的厚度约25米。沿走向,该矿体可追索250米。正如所知道的,这种石英盲脉的下面无通道,并且在氟-锂花斑岩的深部和侧部 Veins, irregular equiaxed, lenticular and spheroidal quartz bodies containing rare metal mineralization (tin-tungsten, tungsten-beryllium, molybdenum or rare earth) are often found in many well-differentiated granite intrusions, Open the table and quickly pinch out in the depths. They vary widely in size and size: up to several hundred meters in length and up to 20-30 meters in thickness, with one of the ores called “Tu-pa” (Fig. 1) exposing depths up to 200 Meters, the maximum thickness of about 25 meters. Along the strike, the ore body can reclaim 250 meters. As is known, there is no channel underneath this quartz blind vein, and in the deep and side of the fluorine-lithium porphyry