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Carbon and nitrogen isotopes in the mantle
Chemical Geology, 1986Abstract Most of mantle carbon has δ13C between −5 and −8‰ in carbonatites, diamonds, MORB, deep crust and subduction zones. From this, it can acquire values from −2.5‰ in CO2 outgassed from subduction zones down to −32.5‰ in placer diamonds, either by contamination from sedimentary carbonate and organic matter or by outgassing effects.
M. Javoy, F. Pineau, H. Delorme
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Geochimica et Cosmochimica Acta, 2013
Abstract The 15 N/ 14 N isotopic ratio of marine particulate organic matter usually increases as a consequence of preferential 14 N-remineralization (ammonification) during decay in the oxic water-column and at the oxic seafloor. However, a fractionation factor 15 e of sediment ammonification in natural environments has not been determined yet ...
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Abstract The 15 N/ 14 N isotopic ratio of marine particulate organic matter usually increases as a consequence of preferential 14 N-remineralization (ammonification) during decay in the oxic water-column and at the oxic seafloor. However, a fractionation factor 15 e of sediment ammonification in natural environments has not been determined yet ...
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