摘要
热液学说不能完全解释金属从岩浆 (或岩石 )中分离和富集的自然条件。酸性岩中包体研究表明 ,存在特殊的硅酸盐熔体卤水 (silicate saltmelt brine)相 ,它在熔体结晶早期即从中分离出来 ,其中富含盐类 (质量分数可达 70 %)、金属、水、F、Cl、B等。而实验研究显示 ,原始的酸性熔体在冷却过程中分裂为硅酸盐熔体 (silicatemelt)和熔体卤水 (melt brine) ,熔体卤水还可进一步分离出更多的熔体卤水系列 (melt brines) ,它们也富含金属元素。熔体中高度富集的流体是产生这一过程非常有利的条件。
The hydrothermal hypotheses can not completely explain natural conditions of metal separation from magma (or rocks) and their concentration. Investigations on inclusions in acid rocks give evidences that there exists a specific phase-silicate-salt melt-brine, which is very rich in salts (70%,mass fraction), metals, water, F, Cl, B etc. It separates from the melt before the beginning of its crystallization. Experimental studies show that the initial acid melt in the cooling process divides into different silicate melt(s) and melt-brine, which in turn, may divide into different melt-brines also rich in metal. The presence of high concentration fluids in the melt is a very favorable factor for the process.
出处
《地学前缘》
EI
CAS
CSCD
2001年第3期39-44,共6页
Earth Science Frontiers
