Figure 5From: Groundwater, possibly originated from subducted sediments, in Joban and Hamadori areas, southern Tohoku, JapanMixing diagrams in the 36Cl/Cl versus 1/Cl space. Horizontal lines indicate the secular equilibrium (Re) of 36Cl/Cl for granite and sedimentary rocks, estimated from the chemical compositions of host rocks (Additional file1: Table S1). Black-filled circles give the 36C/Cl and 1/Cl values of two river water samples collected in area E, representing the cosmogenic end-member. Lines indicate mixing between cosmogenic and modern seawater values after Fifield et al. (2013).Back to article page