本文着重讨论硬玉钙霞正长岩的岩石学、矿物学、岩石化学、REE地球化学、时代及岩石成因。
This paper stresses the study on the petrology, mineralogy, petrochemistry, REE geochemistry, age and petrogenesis of the jadeite-cancrinite syenite.
根据硅岩的岩石学及地球化学特征，对其成因进行了系统研究。
The origins of the siliceous rocks have been researched systematically based on their lithological and geochemical characteristics.
通过矿物学、岩石学和地球化学研究，对大同煤系高岭岩矿物组成、化学组成，及其变化规律和成因进行了系统探讨。
According to research of mineralogy, petrology and geochemistry, we discuss kaolin mineral composition, chemistry composition, and change rules and origin of Datong coal series.
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