1.【地】云英岩
1.a granite-derived rock consisting of mica and quartz
1.Although there are 60 tin-bearing greisen veins, only a few of them form the main ore bodies.
共圈出含锡云英岩脉60余条,但主矿体却只有少数几条。
2.Structural ore-controlling characteristics of the greisen body-type tungsten-tin mineralization in Da'ao area, Hunan province
湖南大坳矿区云英岩体型钨锡矿化构造控矿特征