Supplement to: Croot, Peter L; Heller, Maija I; Wuttig, Kathrin (2019): Redox Processes Impacting the Flux of Iron(II) from Shelf Sediments to the OMZ along the Peruvian Shelf. ACS Earth and Space Chemistry, 3(4), 537-549, https://doi.org/10.1021/acsearthspacechem.8b00203