Light hydrocarbons in sediments of ODP Site 124-768, supplement to: Berner, Ulrich; Bertrand, Philippe (1991): Light hydrocarbons in sediments of the Sulu Sea Basin (Site 768): genetic characterization by molecular and stable isotope composition. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 227-231

Ulrich Berner & Philippe Bertrand
Geochemical investigations on gases and interstitial waters from ODP Site 768 (Sulu Trench/Philippines) demonstrate the application of molecular gas composition in combination with stable isotope analyses to the genetic classification of light hydrocarbons. 13C/12C and D/H ratios of methane from gas pockets in cores and gases desorbed from frozen sediments by a vacuum/acid treatment suggest a microbial generation of methane by a CO2 reducing process in sediments with low sulfate concentrations. Isotope data and molecular...
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