Fig. 1From: Original composition and formation process of slab-derived deep brine from Kashio mineral spring in central JapanLocation and geological setting of the Kashio mineral spring. a Location of the Ooshika–Mura and the Kashio mineral spring. b Geological setting of Ooshika–Mura and the positions of the sampled water (red squares: mineral springs, blue open circles: river, small gray circles: small springs). Depth contours and geology were modified from GeomapNavi (2018)Back to article page