Active faults in the Sea of Marmara, western Turkey, imaged by seismic reflection profiles |
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Authors: | Parke Minshull erson White McKenzie Kuçu Bull Görür & engör |
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Institution: | Bullard Laboratories, Madingley Road, Cambridge CB3 0EZ, UK,;Maden Tetkik ve Arama Genel Müdürlügü, Ankara, Turkey,;Southampton Oceanography Centre, Southampton SO14 32H, UK,;ITÜMaden Fakültesi, Jeoloji Bölümü, Ayazaga 80626, Istanbul, Turkey |
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Abstract: | Turkey is moving westward relative to Eurasia, thereby accommodating the collision between Arabia and Eurasia. This motion is mostly taken up by strike-slip deformation along the North and East Anatolian Faults. The Sea of Marmara lies over the direct westward continuation of the North Anatolian Fault zone. Just east of the Sea of Marmara, the North Anatolian Fault splits into three strands, two of which continue into the sea. While the locations of the faults are well constrained on land, it has not yet been determined how the deformation is transferred across the Sea of Marmara, onto the faults on the west coast of Turkey. We present results from a seismic reflection survey undertaken to map the faults as they continue through the three deep Marmara Sea basins of Çlnarclk, Central Marmara and Tekirdag, in order to determine how the deformation is distributed across the Sea of Marmara, and how it is taken up on the western side of the sea. The data show active dipping faults with associated tilting of sedimentary layers, connecting the North Anatolian Fault to strike-slip faults that cut the Biga and Gallipoli Peninsulas. |
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