Physics
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44.1145k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 44, Issue 8, pp.1145-1150
Physics
6
Scientific paper
Hydrocarbon gases (methane, ethane, ethene, propane, propene, isobutane and n -butane) are present in low concentrations in the top two meters of sediment from the shelf, slope and basin of the Bering Sea. Methane is most abundant and its concentration increases with depth in the sediment. Average concentrations of methane recovered from these sediments are between about 4000 and 5000 nl per 1 of interstitial water. Ethane, ethene, propane and propene are present in almost all samples, but the concentrations of these gases are about two orders of magnitude lower than the concentration of methane. The average ratios of ethane to ethene are usually greater than one in shelf sediment, about one in slope sediment, and usually less than one in basin sediments. These hydrocarbon gases are probably derived from low-temperature chemical and biochemical processes operating at or near the sea-floor. At one location on the shelf, hydrocarbon gases suggest the possibility of petroleum at depth.
Kvenvolden Keith A.
Redden George D.
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