摘要
庐山南麓发育一套变细碧—石英角斑岩系火山岩 ,岩性组合从早到晚反映了由基性到酸性的岩浆演化规律。火山活动具有由喷发相(喷溢亚相)→喷发—沉积相的特点 ,构成了具有韵律性的火山喷发特征。经同位素年代研究属晋宁期火山喷发产物 。
A suite of metaspilite-quartz keratophyre is developed on the southern foot of Mt. Lushan.In lithologies,this rock suite changes from basic to acidic with time,which is in conformity with the normal rule of magmatic evolution. Volcanic activity is characterized by effusion-eruption-sedi-mentation,forming multiple rhythmic volcanic rock suite.Isotopic geochronological study has revealed that this rock suite is a product of Jiningean volcanic eruption,and is Early Neoproterozoic in age.
出处
《江西地质》
2000年第2期100-105,共6页
Jiangxi Geology
关键词
新元古代
火山活动
岩石特征
江西
海相
Neoproterozoic
volcanic activity
petrographic feature
Lushan area
Jiangxi
