摘要
一些与石英脉型钨锡矿化有关的花岗岩体内常发育有形态不同、规模不等、成分各异的矿化囊包体,其成因难于用岩浆结晶分异和岩浆期后热液成矿作用解释。地质和实验资料表明,此类花岗质岩浆体系中不仅存在液态分离作用形成熔离矿化囊包体,而且熔离成因的黑钨矿矿囊可作为岩体可以形成岩浆热液钨矿的标志,同时说明石英脉型黑钨矿床的剥蚀深度较大。
Nests of tungsten ore with various shapes, sizes can often be found in the granite associated with quartz vein tungsten deposits. It's difficult to explain them with magmatic crystallization differentiation and postmagmatic hydrothermal mineralization. Both geology and lab data demonstrate that there is liquid immiscibility during the evolution of granitic magma. Not only can it produce nests of tungsten, but also, as one of clues for prospecting, it shows that the associated granitic magma can lead to large hydrothermal tungsten deposit. Moreover, the nests can indicate that the quartz vein deposits has been denuded intensely.
出处
《世界地质》
CAS
CSCD
2003年第4期357-360,403,共5页
World Geology
