摘要
从地质特征及室内各种测试入手,对比国外典型地区同类岩石成分特征,运用多种分析方法,对南秦岭中段广泛分布的亚碱性-碱性岩进行深入研究,确定了岩石形成的构造背景、成岩时代,并对岩石多样性原因与演化机理进行了探讨。岩石产于大陆板内张性深大断裂环境,橄榄拉斑玄武岩浆为本区的原始岩浆。
This paper is mainly concerned with the origination and evolution ofsubalkaline-alkaline rocks from the middle part of south Qingling, Comparedwith the typical petrological characteristics of the equivalents in theworld, these rocks were formed unde the tensional rift environment withinthe continental plate. The forming age and the variety of the igneousrocks as well as evolution mechanism have been shown through analysesof field observation and many kinds of measurements. The research hasprovided abundant data to discover the south Qingling history and fill theblank in the research history of alkaline rocks in this area.
关键词
碱性岩
岩浆
演化
板块
构造环境
alkaline rock
magmatic evolution
tectonic evolution history
south Qingling
