Petrography and petrochemistry of the volcanic rocks of quaternary volcanoes of northeastern Japan.
Petrography and petrochemistry of the volcanic rocks of quaternary volcanoes of northeastern Japan.
复制标题
日本东北部第四纪火山的火山岩岩相学和岩石化学。
DOI：
10.1016/0016-7037(70)90110-9
复制
发表时间：
1961
影响因子：
5
通讯作者：
Y. Kawano
中科院分区：
文献类型：
--
作者：
Y. Kawano
用同位素稀释法测定了斑晶与寄主熔岩之间稀土元素的固液分配系数。分析的斑晶包括单斜辉石、正辉石、橄榄石、云母、角闪石、石榴石、斜长石和钾长石。大部分数据的一致性表明，大多数斑晶在平衡或准平衡条件下结晶。有足够的数据表明，相对和绝对分配系数可以与斑晶的主要元素组成。长石中Eu正异常的大小随长石中碱含量的增加而增大。
Solid-liquid partition coefficients between phenocrysts and the host lavas have been measured for rare-earth elements by an isotope dilution technique. Phenocrysts analyzed include clinopyroxenes, orthopyroxenes, olivines, micas, amphiboles, garnet, plagioclases and K-feldspar. The consistency of much of the data suggests that most of the phenocrysts crystallized under equilibrium, or quasi-equilibrium, conditions. There is sufficient data on pyroxenes and feldspars to indicate that relative and absolute partition coefficients can be correlated with the major element composition of the phenocrysts. The size of the positive Eu anomaly in feldspars increases with increasing alkali content of the feldspar.