摘要
根据小秦岭石英脉型金矿床石英脉的空间分布、结构构造特征和矿床形成的温压条件，提出小秦岭金矿的液压致裂定位机制。在成矿期间容矿空间的扩张与矿液的充填是同时的，容矿空间的形成是矿液液压致裂作用的结果。在成矿过程中，随着矿液自身压力的逐渐增加，当达到或超过围岩静压力时，围岩便产生张裂，矿液随之充填沉淀。照此反复进行，矿脉逐渐增生，最终形成不同期次、不同矿化阶段的脉状金矿床。
We put foward fluid fracturing location mechanism of ore body by analying space dis-tributoin,texture,structure of quartz vein and temperature-pressure condition during depositforming in Xiaoqinling quartz vein-style deposit.During mineralization tension of host spaceand ore fluid filling are simultaneous,formation of the host space is the result of fluid-frac-turing. During deposit forming,as the fluid pressure increasing,wall rock produced tensioncrack when the fluid pressure is equal to or exceed wall rock pressure,then,ore fluid filledand deposited in it.As the same way,overgrowth of the ore body,at last,formed'vein-style'gold deposit of different times and stages of mineralization .
出处
《河南地质》
1994年第1期1-4,共4页
Henan Geology
关键词
金矿床
液压致裂
成矿机理
Xiaoqinling,gold deposit,fluid fracturing
