Submarine Seep of Carbon Dioxide in Norton Sound, Alaska

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Science  21 Sep 1979:
Vol. 205, Issue 4412, pp. 1264-1266
DOI: 10.1126/science.205.4412.1264


Earlier workers have described a submarine gas seep in Norton Sound having an unusual mixture of petroleum-like, low-molecular-weight hydrocarbons. Actually, only about 0.04 percent of the seeping gas is hydrocarbons and 98 percent is carbon dioxide. The isotopic compositions of carbon dioxide13CPDB = –2.7 per mil) and methane13CPDB = –36 per mil, where PDB is the Peedee belemnite standard) indicate that geothermal processes are active here.