论文部分内容阅读
进行火成岩岩性描述时,在许多情况下往往不注意钾钠长石中钠长石的含量。可是,钠长石的含量和斜长石号一样,可作为对比单个侵入体的准则和分类的标志,同时还可用于确定岩石的结晶温度。测定钾钠长石中钠长石的含量,通常是采用化学分析或通过条纹嵌晶的计算来完成;也可以采用伦琴射线或火焰光度法。前一种方法非常繁杂,而且花费大,因为在很多情况下,从岩石中分离钾钠长石很困难,而且难以保证样品的足够纯度。第二种方法,由于钾钠长石在大多数情况下析离不完全,所以仅适于钠长石的粗略估计。П.Н.奇尔文斯基指出,条纹长石中呈固溶体的
In the description of igneous lithology, the content of albite in K-feldspar is often neglected in many cases. However, the content of albite, like that of plagioclase, serves as a hallmark of criteria and classifications of individual intrusions and can be used to determine the crystallization temperature of rocks. Determining the content of albite in potash feldspar is usually done by chemical analysis or by calculation of streaking cristalisation; it is also possible to use xenon radiation or flame photometry. The former method is very complicated and costly because in many cases it is difficult to isolate kalnasite from rock and it is difficult to ensure sufficient purity of the sample. The second method, due to the incomplete detachment of potassium sodium feldspar in most cases, is only suitable for rough estimation of albite. П.Н. Chillingski pointed out that the stripe feldspar is solid solution