Physics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45..589s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Issue 4, pp.589-594
Physics
4
Scientific paper
Numerical modeling of the terrestrial oxygen budget based on the revised 13 C carb record by et al. (1980) has shown that total photosynthetic oxygen has varied between ±7% and ±10% of its average reservoir size (~3.2 × 10 22 g) during the last 800 myr as a result of oscillations of the sedimentary reservoir of organic carbon. Calculated curves of oxygen evolution display a distinct minimum in the Early Paleozoic framed by two maxima in the Latest Proterozoic and the Mesozoic. The sympathetic relationship observed between the curves of total oxygen evolution and respective functions for the partial reservoir of sulfate-bound oxygen suggests that the O 2 required for an additional conversion of sulfide to sulfate was most probably provided by excess burial of organic carbon, the results of the modeling thus adding credence to current interpretations proposed for the negative correlation between the secular 13 C / 12 C and 34 S / 32 S trends.
Junge Christian E.
Schidlowski Manfred
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