Metal diagenesis in oxic marine sediments

Details Metal diagenesis in oxic marine sediments Metal diagenesis in oxic marine sediments

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..61..211k&link_type=abstract

Earth and Planetary Science Letters, Volume 61, Issue 2, p. 211-219.

Physics

31

Scientific paper

The metal-nutrient relationships observed for nickel and cadmium in the deep ocean are continued at the interface between seawater and oxidizing pore water. This continuum results in pore water concentrations of these metals which are only slightly greater than near-bottom seawater levels. Manganese concentrations in these oxidizing pore waters are also extremely low, less than three times bottom water. In contrast, release in the boundary layer produces a maximum of dissolved copper which is 10-40 times ambient seawater.
Assuming these pore waters are at steady state, flux estimates based on these measurements suggest that the manganese in todorokite-rich nodules of the central equatorial Pacific was not supplied by upward diffusion through pore waters below the interface. Most nodular nickel is precipitated with manganese while nodular copper is supplied by diffusion.
Present address: Department of Chemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, U.S.A.

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