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。
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。
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。
Based on the research of isotope ratios of lead, sulfur, oxygen and carbon in the ores and rocks of this area, it is held that Qinglongcun Group serve as the source bed of gold.
通过对矿区矿石、岩石中铅、硫、氧同位素组成研究，查明青龙村群为金的矿源层。
The feature of the source bed is the essential condition for the formation of gold deposits of cer-tain types.
矿源层是某些类型金矿成矿的必要条件之一。
The feature of the source bed is the essential condition for the formation of gold deposits of cer-tain types.
矿源层是某些类型金矿成矿的必要条件之一。
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