Electrical Resistivity Structure and Helium Isotopes around Naruko Volcano, Northeastern Japan and Its Implication for the Distribution of Crustal Magma
Figure 1
(a) Distribution of plate boundaries in northeastern Japan. The rectangle denotes the study area shown as Figure 1(b). Solid triangles show the Quaternary volcanoes [7]. (b) Distribution of volcanoes (solid lines) and active faults (broken lines) in the study area. The MT sites (open squares) are also shown. A: Akakura Caldera Volcano (Pliocene to 1 Ma), H: Hanayama Caldera volcano (Miocene), K: Kurikoma Volcano (0.5 Ma to present), M: Mukaimachi Caldera Volcano (Pliocene to 0.6 Ma), N: Naruko Caldera Volcano (0.05 Ma to present), O: Onikobe Caldera Volcano (0.5 to 0.2 Ma), S: Sanzugawa Caldera Volcano (Late Miocene to Pliocene) [8–10].
