Figure 4From: Groundwater, possibly originated from subducted sediments, in Joban and Hamadori areas, southern Tohoku, JapanMixing diagrams in the 129I/I versus 1/I space (a) and (b) is the enlarged portion of (a). Lines indicate mixing between pre-anthropogenic meteoric water, seawater, and anthropogenic meteoric water with the highest I samples. Ages above the dashed lines indicate iodine ages, as determined from Equation 1.Back to article page