摘要
本文根据临沧锗矿床中富锗煤与硅质岩的空间分布规律、富锗煤中黄铁矿的硫同位素组成、锗在矿化煤层中的品位变化规律以及硅质岩的地球化学特征，探讨了分散元素锗形成独立矿床的可能机制。研究结果表明，与矿化煤层互层的硅质岩为热水沉积成因，矿化煤层中的锗主要来自形成硅质岩的热水溶液，而这种热水溶液中的锗则主要由盆地基底的富锗花岗岩所提供。
The mechanism of formation of the Lincang germanium deposit is discussed in the light of the spatial distribution of Ge-rich coal and siliceous rocks, the sulfur isotopic composition of pyrite in the Ge-rich coal, the variation of Ge abundance in the coal seams and the geochemical characteristics of the siliceous rocks. The results show that the siliceous rocks intercalated with the coal seams were deposited from a hydrothermal medium through which germanium was enriched in the coal beds. The primary source of germanium is thought to be the Ge-rich granite in the base-ment of the sedimentary basin.
出处
《矿物学报》
CAS
CSCD
北大核心
1996年第2期97-102,共6页
Acta Mineralogica Sinica
基金
国家攀登计划项目
"与寻找超大型矿床有关的基础研究"资助
关键词
分散元素
锗矿床
硅质岩
热水沉积
成因
genesis
Lincang germanium deposit
dispersed element
siliceous rock
hydrothermal sedimentation
