Carbon and nitrogen diagenesis in deep sea sediments

Details Carbon and nitrogen diagenesis in deep sea sediments Carbon and nitrogen diagenesis in deep sea sediments

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44.1463w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Issue 10, pp.1463-1470

Mathematics

Logic

7

Scientific paper

The sections penetrated on Leg 58 of the Deep Sea Drilling Project represent periods of geologic time during which depositional conditions apparently remained quite constant, thus offering an unusual opportunity to study the effects of diagenesis on organic material. Organic carbon and nitrogen contents decrease monotonically with increasing depth of burial before levelling off at minimum values of about 0.05-0.10 and 0.01%, respectively. The depths at which minima are reached vary from site to site, but the ages of the sediments at the minima are all about 2-5 Myr. These data indicate that diagenetic transformations are responsible for the gradual depletion of organic carbon and nitrogen. If diagenesis is at least partly the result of microbial activity, then the role of bacterial ecosystems in deep water sediments is much greater than has previously been thought.

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