钠长斑岩
The K-Ar isotope age of albite phenocryst in albitophyre vein is 372Ma,while that of the ground mas.
钠长斑岩中钠长石的K-Ar年龄为372Ma,基质年龄为337Ma。
albitophyre:钠长斑岩
albitite 钠长岩 | albitophyre 钠长斑岩 | albronze 铝青铜