Physics
Scientific paper
Nov 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..33....1m&link_type=abstract
Earth and Planetary Science Letters, Volume 33, Issue 1, p. 1-10.
Physics
8
Scientific paper
A model for diffusion is developed which incorporates measured values of the diffusion coefficient as a function of depth. The numerical method used to solve the resulting differential equation is described. The model is applied to the profiles of dissolved constituents in cores obtained by the Deep Sea Drilling Project using diffusion coefficients determined by electrical resistivity measurements. The profile of dissolved strontium of site 323 (Leg 35, DSDP, Bellingshausen Sea) is used to test the validity of the model. Application of the model at sites 70 and 71 (Leg 8, DSDP, Clipperton fracture zone) and sites 239 and 245 (Leg 25, DSDP, Indian Ocean) shows that the linearly correlated profiles of dissolved calcium and magnesium are principally the result of physical transport processes and thus that the predominant location of chemical reaction supporting the gradients must lie close to the basalt-sediment interface.
Gieskes Joris M.
McDuff Russell E.
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