Continental inputs of beryllium to the oceans

Details Continental inputs of beryllium to the oceans Continental inputs of beryllium to the oceans

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992e%26psl.114..101b&link_type=abstract

Earth and Planetary Science Letters, Volume 114, Issue 1, p. 101-111.

Physics

11

Scientific paper

An understanding of the geochemistry of the cosmogenic radioisotope 10Be (t1/2 = 1.5 My) and the stable isotope 9Be is necessary for the development of their use in deep-sea sediments as a geochronometer and as a monitor of variations in cosmogenic nuclide production. We examined these isotopes in oceanic regions strongly influenced by input of continental materials; the effects of atmospheric aerosols were studied through examination of the water column chemistry of the Mediterranean (a basin strongly influenced by Saharan dust) while salinity transects through the Amazon and Ganges-Brahmaputra estuaries were used to investigate riverine fluxes to the oceans. These results were used to quantify riverine and eolian fluxes; they indicate that eolian dust is probably the most significant source of 9Be to the oceans. Changes in 10Be:9Be in the marine sedimentary record which are not associated with radioactive decay or variability in 10Be production can thus result from local or regional changes in dust inputs.

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