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Various hydrocarbon gases (СН4, С2Н4, С2Н6, С3Н6, С3Н8, С4Н8, n-С4Н10) and CO2 have been extracted in low concentrations from different layers of marine sediments up to 2 m thick on the continental shelf of the East Siberian Sea along the profile from the mouth of the Indigirka River to the ice shelf border. A freshwater complex supplied by the Indigirka and other rivers has the dominant influence...