Gas emissions and active tectonics within the submerged section of the North Anatolian Fault zone in the Sea of Marmara.

Géli, L., Henry, P., Zitter, T., Dupré, S., Tryon, M., Çagatay, M. N., Mercier de Lépinay, B., Pichon, X. L., Sengör, A., Görür, N., Natalin, B., Uçarkus, G., Özeren, S., Völker, David, Gasperini, L., Burnard, P. and Bourlange, S. and Marnaut Scientific Party (2008) Gas emissions and active tectonics within the submerged section of the North Anatolian Fault zone in the Sea of Marmara. Earth and Planetary Science Letters, 274 (1/2). pp. 34-39. DOI 10.1016/j.epsl.2008.06.047.

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Abstract

The submerged section of the North Anatolian fault within the Marmara Sea was investigated using acoustic techniques and submersible dives. Most gas emissions in the water column were found near the surface expression of known active faults. Gas emissions are unevenly distributed. The linear fault segment crossing the Central High and forming a seismic gap – as it has not ruptured since 1766, based on historical seismicity, exhibits relatively less gas emissions than the adjacent segments. In the eastern Sea of Marmara, active gas emissions are also found above a buried transtensional fault zone, which displayed micro-seismic activity after the 1999 events. Remarkably, this zone of gas emission extends westward all along the southern edge of Cinarcik basin, well beyond the zone where 1999 aftershocks were observed. The long term monitoring of gas seeps could hence be highly valuable for the understanding of the evolution of the fluid-fault coupling processes during the earthquake cycle within the Marmara Sea.

Document Type: Article
Keywords: seismicity, fluids, gas emission, Marmara Sea, North Anatolian Front
Research affiliation: OceanRep > SFB 574 > A1
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.epsl.2008.06.047
ISSN: 0012-821X
Projects: SFB574
Date Deposited: 15 Dec 2009 16:43
Last Modified: 09 Feb 2017 08:33
URI: http://oceanrep.geomar.de/id/eprint/2156

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