報告
山梨県富士河口湖町毛無山周辺産ザクロ石酸性火山岩の分布と岩石学的特徴
2015 年 121 巻 4 号 p. 141-146
詳細
2015 年 121 巻 4 号 p. 141-146
We describe the areal distributions and petrological characteristics of garnet-bearing acidic volcanic rocks at Mt. Kenashiyama, Fujikawaguchiko-machi, central Japan. The volcanic rocks are divided into three groups on the basis of lithology. Chemical analyses show that the rocks are mainly rhyolite. Their occurrences suggest that two of the groups are dikes or sills that are 50-100 m thick, with exposures 2-3 km wide.
