Concentrations and isotope ratios of carbon, nitrogen and sulfur in ocean-floor basalts

Details Concentrations and isotope ratios of carbon, nitrogen and sulfur in ocean-floor basalts Concentrations and isotope ratios of carbon, nitrogen and sulfur in ocean-floor basalts

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.2433s&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 48, Dec. 1984, p. 2433-2441.

Physics

32

Basalt, Carbon Isotopes, Geochemistry, Nitrogen Isotopes, Ocean Bottom, Sulfur Isotopes, Abundance, Earth Mantle

Scientific paper

Ocean floor basalts studied from the Galapagos Ridge, FAMOUS area, Cayman Trough and Kilauea east rift contain 20-200 ppm carbon and 0.3-2.8 ppn nitrogen as sums of the vesicle-filling gases CO2 and N2 and dissolved species. The wide range of carbon contents found is due partly to the different extent of outgassing of vesicle-filling gases and partly to depth dependency of dissolved CO2 in the basalts. Sulfate commonly exists with sulfide in these basalts, and the sulfate/sulfide ratio increases with increasing water content, perhaps reflecting the higher oxidation potential in basalt melt of the higher water content.

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