Figures F1-F7
Tables T1-T2

F1. Tectonic setting and west–east cross section.

F2. Distribution of drill sites.

F3. Depth profiles for iodide, bromide, and chloride.

F4. Depth distribution of I/Br (mM/mM) ratios.

F5. Summary plot of ¹²⁹I/I ratios.

F6. Depth profiles of ¹²⁹I/I ratios.

F7. Mixing plot, Site 1245.

Tables T1-T2

T1. Concentrations of iodine, bromine, and chlorine.

T2. Iodine isotopic compositions and minimum ages.

Figures F1-F7
Tables T1-T2