摘要
地质界对"碱性岩"的认识至今没有统一。本文在考察岩石特征和分类的基础上,结合众家观点,从岩浆地球化学结晶演化的角度,对碱性岩进行定义,即碱性矿物占多数的火成岩石称为碱性岩,这个定义与传统定义的不同之处是没有SiO_2饱和度的限制。
There is not a consensus on the concept of alkalic rock. On the base of inves tigating its features, classfications and suggestions of other references , we give a definition from the angle of crystallization and evolution of magma in geochemistry, that is , rock in which alkalic minerals are majority is called alkalic one. The difference from the traditional definition is that there is no limit of SiO_2 in this one.
出处
《中山大学研究生学刊(自然科学与医学版)》
1997年第1期94-100,共7页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
关键词
碱性岩
饱和度
碱性矿物
似长石
Alkalic rock, Level of saturation, Alkalic mineral, Feldspathoids