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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 107, NO. B11,
2286,
doi:10.1029/2001JB000450,
2002
Interaction between faulting and sedimentation in the Sea of Marmara, western Turkey
J. R. Parke
Bullard Laboratories,
Cambridge,
UK
R. S. White
Bullard Laboratories,
Cambridge,
UK
D. McKenzie
Bullard Laboratories,
Cambridge,
UK
T. A. Minshull
Southampton Oceanography Centre,
Southampton,
UK
J. M. Bull
Southampton Oceanography Centre,
Southampton,
UK
I. Kuşçu
Maden Tetkik ve Arama Genel Müdürlügü,
Ankara,
Turkey
N. Görür
Maden Fakültesi, Jeoloji Bölümü
Istanbul Technical Üniversity,
Ayazaga, Istanbul,
Turkey
C. Şengör
Maden Fakültesi, Jeoloji Bölümü
Istanbul Technical Üniversity,
Ayazaga, Istanbul,
Turkey
Abstract
The Aegean region is one of the most rapidly deforming continental areas in the world. In the Sea of Marmara, interaction
between strike-slip and extensional faulting has led to a complicated style of local deformation. To the east, the continental
plate containing eastern and central Turkey is moving westward with respect to Eurasia, with little internal deformation.
Tectonic deformation is restricted to a narrow zone along the dominantly strike-slip North Anatolian fault. However, in the
vicinity of the Sea of Marmara, both surface mapping of faults and earthquake fault plane solutions indicate that extensional
motions, presumably related to back arc extension behind the Hellenic subduction zone, create a much wider zone of deformation
which reaches hundreds of kilometers in width. We use a regional grid of high-resolution seismic reflection profiles to map
the fault systems as they cross the Sea of Marmara and show how they divide the Sea of Marmara into separate deep basins with
distinctive sediment sources and depositional styles. In the southern Sea of Marmara these basins are half graben, formed
on north dipping fault planes, which have trapped sediment coming into the Sea of Marmara from the south. No evidence is found
in the data set for the existence of a single strike-slip fault through the Sea of Marmara or for the existence of a northern
boundary fault along the Tekirdağ and Central Marmara basins. We conclude that a single strike-slip fault would be incapable
of accommodating the relative motion and extension observed between western Turkey and Eurasia.
Published 12
November
2002.
Index Terms: 3025 Marine Geology and Geophysics: Marine seismics (0935); 8105 Tectonophysics: Continental margins and sedimentary basins; 8010 Structural Geology: Fractures and faults.
Read Full Article (file size: 5134415 bytes) Cited by
Citation: Parke, J. R., R. S. White, D. McKenzie, T. A. Minshull, J. M. Bull, I. Kuşçu, N. Görür, and C. Şengör
(2002),
Interaction between faulting and sedimentation in the Sea of Marmara, western Turkey,
J. Geophys. Res.,
107(B11),
2286,
doi:10.1029/2001JB000450.
Copyright 2002 by the American Geophysical Union.
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