Interaction of organic compounds with calcium carbonate-II. Organo-carbonate association in Recent sediments

Details Interaction of organic compounds with calcium carbonate-II. Organo-carbonate association in Recent sediments Interaction of organic compounds with calcium carbonate-II. Organo-carbonate association in Recent sediments

Nov 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37.2435s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 11, pp.2435-2447

Computer Science

11

Scientific paper

Surface area measurements as well as organic carbon, nitrogen and phosphorus analyses on various grain size fractions of carbonate mud samples confirm that in natural environments of carbonate deposition, surface sorption processes take place which are similar to those described earlier for dissolved organics and artificially suspended calcite particles in both seawater and synthetic solutions. The specific surface area of the sediment increases from 1.8m 2 /g for the coarse-grained fraction to 12.5 m 2 /g for the fine material; likewise organic carbon, nitrogen and phosphorus increase with increasing surface area so that there are 1.20 mg C, 0.175 mg N and 0.06-0.20 mg P associated with every square meter of carbonate surface irrespective of the mineralogy of the sediment particles. It appears that the organic matter in these sediments is similar in composition, structure and quantity to the organic layers produced in sorption experiments. With their apparently defined structure and ubiquitous nature, these layers could determine the mineralogy and orientation of submarine carbonate cement or could even be a prerequisite to calcification in general.

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