火山断陷盆地的边缘成矿论

DISCUSSION ON THE MINERALIZATION NEAR THE MARGINAL ZONES OF THE VOLCANO-GRABEN BASINS

火山断陷盆地是构造-岩浆-地热体系的最活跃场所。大中型热液矿床往往赋存于盆地边缘。高渗透构造破碎带、基底和火山盖层建造的相应组合、多阶段次火山岩的侵入、配套的水文地质环境构成了盆边热源、矿源、水源、矿质沉淀空间的最佳匹配条件。因此．盆地边缘作为矿床预测和靶区优选的显著目标值得找矿者的高度重视。

The volcano-graben basins are the most active fields for the tectonic-magmatic-geothermal system. The large-middle scale hydrothermal deposits generally occur near the marginal zones of the basins, in which there are strons infiltrated fault-loosened zones, formations of the basement and volcanic uverlying strata, instrusions uf multistage subvolcanic rucks and the associated hydrogeoloSic environment, so as to provide essential themo, water, mater and space of mineralization. Therefore, geologists should pay high attention to marginal zones of volcano-graben basins when they are looking for prospeeting targets.