Carbon isotope geochemistry of the Precambrian Lomagundi carbonate province, Rhodesia

Details Carbon isotope geochemistry of the Precambrian Lomagundi carbonate province, Rhodesia Carbon isotope geochemistry of the Precambrian Lomagundi carbonate province, Rhodesia

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gecoa..40..449s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 40, Issue 4, pp.449-455

Physics

16

Scientific paper

Carbon isotope measurements carried out on 67 dolomite samples from the Middle Precambrian Lomagundi Group (Rhodesia) have yielded a 13 C mean of +8.2 ± 2.6%. vs PDB. With the outcrop of these dolomites extending over a distance of almost 300 km, the Lomagundi dolomite faces is likely to represent the largest isotopically anomalous sedimentary carbonate province ever recorded. It is concluded that the anomalous carbonates formed in a closed basin whose 13 C level had been substantially increased as a result of a preferential removal (within sedimentary organics) of the light carbon isotope.

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