三波川変成岩のK-Ar年令
1977 年 72 巻 9 号 p. 361-365
詳細
1977 年 72 巻 9 号 p. 361-365
K-Ar ages were determined on some metamorphic rocks from the Sanbagawa terrain. The ages obtained are mostly of Middle and Late Cretaceous (110-67 m. y.). This range may not indicate the age of the main stage of metamorphism, but may represent the age of uplifting of the metamorphic rocks. The complete interpretation remains to be solved in future.
