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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Sr isotopic ratios of hydrothermal fluids from the Okinawa Trough and the implications of variation in fluid–sediment interactions

Fig. 1

a Location of the Okinawa Trough. The box denotes the area shown in Fig. 1b. b Locations of the hydrothermal fields in the Okinawa Trough (stars). Triangles indicate Quaternary volcanoes. Bathymetric contours are indicated every 200 m (thin lines) and 1000 m (thick lines). Dashed lines represent depth contours (100 and 200 km) in the Wadati-Benioff zone (Letouzey and Kimura 1986; Pezzopane and Wesnousky 1989). Solid circles indicate the volcanic rock sampling sites: red for those in Shinjo et al. (1999), blue for those in Shinjo and Kato (2000), and yellow for those in this study. MOT and SOT represent the middle Okinawa Trough and southern Okinawa Trough, respectively. Boundaries between NOT and MOT and between MOT and SOT are indicated by light blue dashed lines

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