Figure 6
From: Arima hot spring waters as a deep-seated brine from subducting slab
Analyzed Sr concentration expressed by 1/Sr (ppm-1) versus 87Sr/86Sr of the Arima-type brine. Sr concentration expressed by 1/Sr (ppm-1) versus 87Sr/86Sr of the Arima-type brine analyzed in this study, together with the data of the Rokko granitoids and the Arima group consisting mainly of rhyolitic welded tuffs (Terakado and Nohda 1993). Large red and green stars represent slab fluid compositions derived from the subducted Philippine Sea Plate and Pacific Plate, respectively (Nakamura and Iwamori 2009). The analytical errors of 87Sr/86Sr ratio in this study are approximately 3 × 10-6.