The areal and vertical distribution of iodine, bromine and organic carbon has been examined in a suite of sediment cores from the Panama Basin. Both halogens are approximately correlative with organic carbon in surface sediments. The concentrations of all three elements vary sympathetically but considerably with depth, especially in equatorial carbonate oozes where a distinct mid-depth (40-80 cm) concentration maximum is observed....
Pedersen, T. F., and N. B. Price. 1980. "The geochemistry of iodine and bromine in sediments of the Panama Basin." Journal of Marine Research 38, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1512