In 42 surface sediments from the southwestern Barents Sea, iodine and bromine ranged from 60 to 828 p.p.m. and 12 to 257 p.p.m., respectively. In the surface environment, both I and Br are related to organic matter; the dependence of halogens on the grain size of the sediment is small....
Price, N. B., S. E. Calvert, and P. G. Jones. 1970. "The distribution of iodine and bromine in the sediments of the southwestern Barents Sea." Journal of Marine Research 28, (1). https://elischolar.library.yale.edu/journal_of_marine_research/1172