Indicators of δ^(13)C and δ^(18)O of gas hydrate-associated sediments

查看全文 作　　者：E. Suess

出　　处：《Chinese Science Bulletin》索引2002年第47卷第19期,共5页

基　　金：This work was strongly advised by Prof. Dr. Erwin Suess at GEOMAR, Research Center of Marine Geology in University of Kiel, Germany;Great supports were also from Dr. Gerhard Bohrmann, Dr. Jens Greinert, Dr. Carmen Jung, Dr. Barbara Teichert, Dr. Dick Ri 摘　　要：The analyses of δ13C and δ18O of gas hydrate-associated sediments from two cores on Hydrate Ridge in Cascadia convergent margin offshore Oregon, eastern North Pacific show the values of δ13C from-29.81‰ to -48.28‰(PDB) and δ18O from 2.56‰to 4.28‰ (PDB), which could be plotted into a group called typical carbonate minerals influenced by the methane in cold venting. Moreover, the values of δ13C and δ18O show a consistent trend in both cores from top to bottom with increasing of δ13C and decreasing of δ18O. This trend could be explained as an effect caused by the anaerobic oxidation of methane (AOM) in depth and the oxygen fraction during the formation of gas hydrate in depth together. These characteristics of δ13C and δ18O indicate that the gas hydrate-associated sediments are significantly different from the normal marine carbonates, and they are deeply influenced by the formation and evolution of gas hydrate. So, the distinct characteristics of δ13C and δ18O of gas hydrate-associated 关键词：gas HYDRATE ASSOCIATED SEDIMENTS δ13C and Δ18O indi-cators.

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Indicators of δ^(13)C and δ^(18)O of gas hydrate-associated sediments

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