A synthesis: Late Cenozoic stress field distribution at northeastern corner of the Eastern Mediterranean,SE Turkey |
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| Authors: | Semir Over Suha Ozden Ulvi Can Unlugenc Huseyin Y?lmaz |
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| Institution: | 1. Cumhuriyet University, Department of Geophysics, Sivas, 58140, Turkey;2. Cumhuriyet University, Department of Geology, Sivas, 58140, Turkey;3. Cukurova University, Department of Geology, Adana, 01330, Turkey |
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| Abstract: | Fault kinematic analysis and inversion of focal mechanisms of shallow earthquakes reveal significant evolution of the regional stress regime in the northeastern most corner of the Eastern Mediterranean region since the Mio-Pliocene to the present time. This study was carried out in the interaction area between the Arabian/African plates and the Anatolian block. The evolution of stress regimes consists of a change from older transpression to younger transtension. Both strike-slip stress regimes having a NNW- to northwest-trending σHmax (σ1) and ENE- to northeast-trending σHmin (σ3) axes induce a sinistral component of displacement on the major intra-continental Karatas–Osmaniye and Misis–Ceyhan faults elongated with the northeast-trending Misis Range between Adana and Osmaniye provinces (sub-area i) and by a NNE-trending plate boundary Amanos fault running along Amanos Range between Antakya and Kahramanmaras provinces (sub-area ii). The inversion results show that the transtensional stress regime is dominantly strike-slip to extension, with an ENE- to northeast-trending σHmin (σ3) axis for sub-areas (i) and (ii), respectively. The inversions of earthquake focal mechanisms indicate that the transtensional stress regime is still active in the whole study area since probably recent Quaternary time. To cite this article: S. Over et al., C. R. Geoscience 336 (2004). |
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| Keywords: | inversion Quaternary stress distribution transpression/transtension tectonics SE-Turkey Eastern Mediterranean domain inversion distribution de contraintes quaternaires tectoniques en transpression/transtension SE Turquie Méditerranée orientale |
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