gold-source bed 金源层
gold ore source bed 金矿源层
gold-bearing source bed 含金矿源层
source bed of gold 金矿矿源层
source bed for gold 金矿源层
Source bed, transporting medium and structural status make up the whole ore-forming geological conditions on Xiaoqinling gold ore field.
小秦岭金矿田的成矿地质条件是矿源（矿源层）、热源、搬运介质和构造条件构成的统一整体，缺一不可。
The granites not only caused the remobilization of gold but also serve as the secondary source bed.
花岗岩不仅使金活化转移，而且也是第二矿源层。
Two mica schists are considered to be the source bed and host rock of gold.
二云母片岩不仅是矿源层，而且还是赋矿围岩。
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