摘要
本文通过对该复式花岗岩体中的长石在岩石结构中呈现出来的特点证明其主要造岩矿物钠长石、钾长石都是从岩浆中结晶出来的。而钠长石的粒度、成分和结构状态研究,则表明各次侵入体中钠长石都是相应侵入时间内一个世代的产物。运用温度计和熔融实验等资料确定了矿物的晶出顺序。文中探讨了钠长石与产于该岩体晚阶段侵入体中的花岗岩型铌钽矿床间的关系。认为用交代观点解释该矿床的形成是不合适的。
Albite and K-feldspar in granites from Limu complex, Guangxi, have textural relationships suggesting a magmatic origin.According to the grain size, chemical composition and structural characteristics, it is proposed that albite crystallized in one generation at appropriate period of each intrusion.On the basis of geothermometric and partial melting experiment, the order of mineral crystallization has been established. Genetic relationship of albite and Nb-Ta ores in association with the latest intrusion of granitic rocks is also discussed. The author disagrees with the metasomatism view in terms of the ore genesis.
出处
《矿物岩石》
CAS
CSCD
1989年第1期15-24,共10页
Mineralogy and Petrology
