摘要
通过对火山－次火山岩化学成份的分析,应用氧同位素、铅同位素、里特曼指数、氧化系数，从不同角度对银山火山一次火山岩进行了分析，结果表明：银山火山一次火山岩是燕山早期火山活动的产物，是地壳部分重熔，地幔岩浆上升进一步熔化硅铅层，形成同熔性火山岩系列。
Through analysing the chemical components of volcanic-subvol- canic rocks, oxygen isotope,lead isotope, Rittmann exponent and oxidation coefficient and are used to analyse volcanic - subvolcanic rocks of Yinshan from every Point ofview. The conclusion showed that volcanic - subvolcanic rocks of Yinshan is the preduct of volcano activity in Yanshan in the early. It is part crust remelted, going - uprnagtna of mantle melt the layer Of silicon - aluminium, form same - melting type volcanic rocks series.
出处
《有色矿山》
1999年第6期9-12,共4页
Nonferrous Mines
关键词
火山一次火山岩
里特曼指数
同位素
火山岩
Volcanic-subvolcanic rock Rittmann exponent Oxidation Coefficient Isotope Same-melting
