邓阜仙花岗岩熔融实验研究

本文通过对邓阜仙花岗岩饱和水熔融实验结果的计算处理和岩石学相图的分析,从实验岩石学的角度证实了邓阜仙花岗岩是岩浆结晶的,而不是花岗岩化形成的。同时,由实验表明,岩石初熔温度除与岩石成分有关外,还与岩石实际形成条件有密切联系。此外,在加氟化物的饱和水熔融实验中,氟化物不仅能降低岩石初熔温度,而且改变了岩浆体系中不同矿物的稳定性,主要使云母和石英变得稳定,酸性斜长石变得不稳定,而钾长石的稳定性基本不变。

STUDY OF DENGFUXIAN GRANITE BY MELTING EXPERIMENT

It is confirmed by the calculating treatment of melting experiment of water seturated Deng-fuxian granite and analysis of petrological phase diagram, in the light of experimental petrology, that Dengfuxian granite was formed by magmatic crystallization instead of granitization. At the same time, it is shown that the initial melting temperature was related not only to the rock composition, but also to the condition during the formation process. Besides, in fluoride-bearing water-satureted experiment, the addition of fluoride can lower the initial melting temperature and change the stability of various minerals in the magmatic system as well, thus making the mica and quartz more stable, acidic plagioclase unstable, and the stability of potassium feldspart unchanged.