Carbon Isotope Geochemistry and 14C Ages of Microbial Mats from the Gavish Sabkha and the Solar Lake
Photosynthetic organisms incorporate carbon with a marked though variable bias in favor of the light carbon isotope (12C) which ultimately derives from a kinetic fractionation effect imposed on the principal assimilatory pathways (see Vogel 1980, O’Leary 1981). As a result, average organic matter is enriched by about 20–30‰ in 12C as compared to oceanic bicarbonate and carbonate, the quantitatively most abundant inorganic carbon species in our environment (Schidlowski 1982, 1983).
KeywordsClay Sulfide Phytoplankton Polysaccharide Assimilation
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