Abstract
Hydrocarbon gases were determined in sediments from three mud volcanoes in the Sorokin Trough. In comparison to a reference station outside the mud volcano area, the deposits are characterized by an enrichment of high-molecular hydrocarbons (C2–C4), an absence of unsaturated homologues, a predominance of iso-butane in comparison with n-butane, and the presence of gas hydrate. The molecular composition of the hydrocarbon gases suggests their deep sources and thermogenic origin. In the pelagic sediments at the reference station, the methane concentration is relatively low (up to 49 ml/l); maximum concentrations are reached in deposits of the Dvurechenskii mud volcano (up to 400 ml/l). It was the first time that gas hydrate was sampled at the Dvurechenskii mud volcano. The gas extracted by dissociation of hydrate samples was dominated by methane (99.5%) with low amounts of ethane and propane (less than 0.5%). The isotopic composition of the methane varies between −62 and −66‰ PDB in δ13C, and between −185 and −209‰ SMOW in δD, indicating a mainly biogenic origin with an admixture of thermogenic gas.
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References
Andreev V (1976) Foredeeps of the Crimea and the Caucasus in the Black Sea (in Russian). Izvestia Akad Nauk SSSR Ser Geol 11:130–133
Bohrmann G, Schenck S (eds) (2002) RV “Meteor” Cruise Report M52/1 MARGASCH, Marine gas hydrates of the Black Sea. GEOMAR Rep 108
Bohrmann G, Ivanov I, Foucher J.-P, Spiess V, Bialas J, Greinert, J, Weinrebe W, Abegg F, Aloisi G, Artemov Y, Blinova V, Broser A, Drews M, Heidersdorf F, Krabbenhöft A, Klaucke I, Krastel S, Leder T, Polikarpov, I, Saburova M, Schmale O, Seifert R, Volkonskaya A, Zillmer M (2003) Mud volcanoes and gas hydrates in the Black Sea—new data from Dvurechenskii and Odessa mud volcanoes. Geo-Mar Lett 23 (3/4) http://dx.doi.org/10.1007/s00367-003-0157-7
Bolshakov AM, Egorov AV (1987) Using of phase-equilibrium degassing method for gasometric studies. Oceanology 27:861–862
Bouriak SV, Akhmetjanov AM (1998) Origin of gas hydrate accumulations on the continental slope of the Crimea from geophysical studies. In: Henriet JP, Mienert J (eds) Gas hydrates: relevance to world margin stability and climate change. Geol Soc Lond Spec Publ 137:215–223
Brekke T, Lonne O, Ohm SE (1997) Light hydrocarbon gases in shallow sediments in the northern North Sea. Mar Geol 137(1/2):81–109
Chung HM, Cormly JR, Squires RM (1988) Origin of gaseous hydrocarbons in subsurface environments: theoretical consideration of carbon isotope distribution. Chem Geol 71:97–103
Egorov AV, Ivanov MK (1998) Hydrocarbon gases in sediments and mud breccia from the central and eastern part of the Mediterranean Ridge. Geo-Mar Lett 18:127–138
Gaynanov VG, Bouriak SV, Ivanov MK (1998) Seismic evidence for gas accumulation related to the area of mud volcanism in the deep Black Sea. Geo-Mar Lett 18:139–145
Ivanov MK, Konyukhov AU, Kulnitskii LM, Musatov AA (1989) Mud volcanoes in deep part of the Black Sea (in Russian). Vestnik MGU Ser Geol 3:21–31
Ivanov MK, Limonov AF, Woodside JM (1998) Extensive deep fluid flux through the sea floor on the Crimean continental margin (Black Sea). In: Henriet JP, Mienert J (eds) Gas hydrates: relevance to world margin stability and climate change. Geol Soc Lond Spec Publ 137:195–215
Kenyon NH, Ivanov MK, Akhmetzhanov AM, Akhmanov GG (eds) (2002) Interdisciplinary study of geological processes in the Mediterranean and Black Seas and North East Atlantic. UNESCO, IOC Tech Ser
Konyukhov A, Ivanov M, Kulnitskii L (1990) On mud volcanoes and gas hydrates in the deep Black Sea Basin (in Russian). Litol Poleznye Iskopaemye 3:12–23
Krastel S, Spiess V, Ivanov M, Weinrebe W, Bohrmann G, Shaskin P, Heidersdorf F (2003) Acoustic investigations of mud volcanoes in the Sorokin Trough, Black Sea. Geo-Mar Lett 23 (3/4) http://dx.doi.org/10.1007/s00367-003-0143-0
Kremlev A, Ginsburg G (1989) The first results of the search for submarine gas hydrates in the Black Sea (21st trip of the R/V Evpatoria) (in Russian). Geol Geofiz 4:110–111
Kruyglyakov V, Kruyglyakova R, Podshueveit V (1996) Mud volcanoes of the Black Sea basin and continental sea margin in connection with the problem of oil and gas content. In: Abstr Vol 4th Int Conf Gas in Marine Sediments, Varna, Bulgaria, pp 28–30
Kvenvolden KA, Field MF (1981) Thermogenic hydrocarbons in unconsolidated sediment of Eel River Basin, offshore northern California. AAPG Bull 65:1642–1646
Kvenvolden KA, Pettinga JR (1989) Hydrocarbon gas seeps of the convergent Hikurangi Margin, North Island, New Zealand. Mar Petrol Geol 6:2–8
Kvenvolden KA, Weliky K, Nelson D, DesMarais DJ (1979) Submarine seep of carbon dioxide in Norton Sound, Alaska. Science 205:1264–1266
Morgunov Y, Kalinin V, Gainanov V et al. (1976) Diapiric folds in the Black Sea of the mountainous Crimea (in Russian). Dokl Akad Nauk SSSR 228(5):1159–1162
Rise DD, Threlkeld CN (1983) Chemical and isotopic composition of natural gas analysis from selected wells in the Gulf of Mexico. USGS Open File Rep 83-152
Sassen R, MacDonald IR, Requejo AJ, Guinasso NI, Kennicutt MC, Sweet ST, Brooks JM (1994) Organic geochemistry of sediments from chemosynthetic communities, Gulf of Mexico slope. Geo-Mar Lett 14:110–119
Schoell M (1980) The hydrogen and carbon isotopic composition of methane from natural gases of various origins. Geochim Cosmochim Acta 44:649–661
Tissot BP, Welte DH (1978) Petroleum formation and occurrence. Springer, Berlin Heidelberg New York
Tugolesov DA, Gorshkov AS, Meisner LB, Solovev VV, Khakhalev EM (1985) Tectonics of Mezo-Cenozoic deposits of the Black Sea basin (in Russian). Nedra, Moscow
Whiticar MJ (1999) Carbon and hydrogen isotope systematics of bacterial formation and oxidation of methane. Chem Geol 161:291–314
Woodside JM, Ivanov MK, Limonov AF (eds) (1997) Neotectonic and fluid flow through seafloor sediments in the Eastern Mediterranean and Black Seas. UNESCO, IOC Tech Ser 48(II)
Acknowledgments
We thank the scientists and crew of Meteor cruise M52/1 for their help in collecting the samples. This is publication Geotech-26 of the programme Geotechnologien of the BMBF and DFG (grant 03G0566A; collaborative project OMEGA), and publication RCOM 85 of the DFG-Research Center “Ocean Margins” (University of Bremen).
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Blinova, V.N., Ivanov, M.K. & Bohrmann, G. Hydrocarbon gases in deposits from mud volcanoes in the Sorokin Trough, north-eastern Black Sea. Geo-Mar Lett 23, 250–257 (2003). https://doi.org/10.1007/s00367-003-0148-8
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DOI: https://doi.org/10.1007/s00367-003-0148-8