Phosphorus accumulation rates in metalliferous sediments on the East Pacific Rise

Details Phosphorus accumulation rates in metalliferous sediments on the East Pacific Rise Phosphorus accumulation rates in metalliferous sediments on the East Pacific Rise

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..34..351f&link_type=abstract

Earth and Planetary Science Letters, Volume 34, Issue 3, p. 351-359.

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Scientific paper

Based on phosphorus, iron and manganese analyses in 16 cores (5 dated) from the crest and flanks of the East Pacific Rise and the Bauer Deep we estimate that phosphorus is being deposited about 20 times faster in metalliferous sediments near the rise crest than in adjacent flank deposits, and about 40 times faster on the crest than in the Bauer Deep. Almost all of the phosphorus on the rise crest is contained in poorly crystallized hydrothermal iron oxyhydroxides, supporting Berner's (1973) proposal of phosphate sorption by these phases. The phosphate is probably derived from seawater, but some hydrothermal contribution cannot be excluded at this time. Flux estimates indicate that smetalliferous edimentation could remove 15-40% of the pre-agricultural river input of dissolved phosphate.

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