我国某地区锂辉石伟晶岩形成特征的初步探讨

PRELIMINARY STUDY OF A SPODUMENE-PEGMATITE IN CHINA

众所周知，锂是目前尖端技术上不可缺少的原料之一，世界各国对锂矿床的寻找是十分重视的。据统计，世界各国95％的锂是来自伟晶岩矿床，其中尤其是锂辉石伟晶岩。因此，锂辉石伟晶岩是锂矿床的重要工业类型矿床。此类矿床在国外报导甚多。

The spodumene-pegmatite described in this paper occurs mostly as veins (except a few irregular bodies) in Silurian-Devonian (?) metamorphic schists. Its distribu-tion is controlled by regional structure. More than thirty species of minerals have been found, among which there are, iu addition to silicates, sulfides, phosphates, carbonates, sulfates and chlorides. Six zones may be recognized within the pegmatite from the margin inward based on mineral associations. Albitization is the predo-minant alteration, but greisenization and muscovitization are only poorly developed. Rare-element distribution exhibits a remark regulation: Li increases gradually in going from the margin to the core, while Be, Nb, and Ta varies conversely with albitization. Genetically, it is regarded that the spodumene-pegmatite is closely re-lated to the spodumene-bearing two-mica granite, from which a special Li-rich peg-matite magma, was derived.