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Determination of natural and anthropogenic 129 I in marine sediments
Author(s) -
Fehn U.,
Holdren G. R.,
Elmore D.,
Brunelle T.,
Teng R.,
Kubik P. W.
Publication year - 1986
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl013i002p00137
Subject(s) - sediment , natural (archaeology) , geology , oceanography , continental shelf , accelerator mass spectrometry , current (fluid) , mass spectrometry , environmental science , environmental chemistry , geomorphology , paleontology , radiocarbon dating , chemistry , chromatography
129 I concentrations in two sediment cores from the continental slope near Cape Hatteras were determined with tandem accelerator mass spectrometry (TAMS). The natural 129 I/ 127 I ratios in these cores are approximately 10 −12 . The input of anthropogenic 129 I has increased this ratio to values close to 10 −10 at the surface of the sediments. The observed natural level of 129 I is about two orders of magnitude above the current detection limit with TAMS, which opens up the possibility for applications of 129 I in the marine system such as dating of sediments and crude oils and tracing of slow water movement in sediments.