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Fig. 1 | Earth, Planets and Space

Fig. 1

From: (U–Th)/He thermochronometric mapping across the northeast Japan Arc: towards understanding mountain building in an island-arc setting

Fig. 1

a Index map of the study area of the N-traverse. Numbered localities are our sampling sites. (U–Th)/He ages obtained in this study are also shown. Quaternary volcanoes: Committee for Catalog of Quaternary Volcanoes in Japan (1999); Active fault traces: Nakata and Imaizumi (2002); Hot Fingers: Tamura et al. (2002); Geothermal gradients: Tanaka et al. (2004); FT age: ages without sample codes indicating data from previous studies: Ganzawa (1987) on the back-arc side, and Goto (2001) on the fore-arc side; Boundaries: the lines showing the eastern and western limits of the OBR, defined by Koike et al. (2005). b Geomorphic cross section of study area. The cross sections were drawn along the 5 light blue lines in Figure (a). These figures were drawn using Generic Mapping Tools (GMT; Wessel and Smith 1991) and 50-m mesh digital elevation model (DEM) of the Geospatial Information Authority of Japan (GSI)

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