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<datestamp>2018-01-11</datestamp>
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<title lang=en>Left-lateral active deformation along the Mosha-North Tehran fault system (Iran): Morphotectonics and paleoseismological investigations</title>
<creator>Solaymani, Shahryar</creator>
<creator>Ritz, Jean-François</creator>
<creator>Abbassi, Mohammad Reza</creator>
<contributor>International Institute of Earthquake Engineering and Seismology (IIEES), Tehran ; Université du Québec</contributor>
<contributor>Risques ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0040-1951</source>
<source>EISSN: 1879-3266</source>
<source>Tectonophysics</source>
<publisher>Elsevier</publisher>
<identifier>hal-00617778</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617778</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00617778</source>
<source>Tectonophysics, Elsevier, 2011, 497 (1-4), pp.1-14. 〈10.1016/j.tecto.2010.09.013〉</source>
<identifier>DOI : 10.1016/j.tecto.2010.09.013</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2010.09.013</relation>
<language>en</language>
<subject lang=en>Iran</subject>
<subject lang=en>Central Alborz</subject>
<subject lang=en>Mosha fault</subject>
<subject lang=en>North Tehran fault</subject>
<subject lang=en>Active fault</subject>
<subject lang=en>Morphotectonics</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The Mosha and North Tehran faults correspond to the nearest seismic sources for the northern part of the Tehran megacity. The present-day structural relationships and the kinematics of these two faults, especially at their junction in Lavasanat region, is still a matter of debate. In this paper, we present the results of a morphotectonic analysis (aerial photos and field investigations) within the central part of the Mosha and eastern part of the North Tehran faults between the Mosha valley and Tehran City. Our investigations show that, generally, the traces of activity do not follow the older traces corresponding to previous long-term dip-slip thrusting movements. The recent faulting mainly occurs on new traces trending E-W to ENE-WSW affecting Quaternary features (streams, ridges, risers, and young glacial markers) and cutting straight through the topography. Often defining en-echelon patterns (right- and left-stepping), these new traces correspond to steep faults with either north- or south-dipping directions, along which clear evidences for left-lateral strike-slip motion are found. At their junction zone, the two sinistral faults display a left-stepping en-echelon pattern defining a positive flower structure system clearly visible near Ira village. Further west, the left-lateral strike-slip motion is transferred along the ENE-WSW trending Niavaran fault and other faults. The cumulative offsets associated with this left-lateral deformation is small compared with the topography associated with the previous Late Tertiary thrusting motion, showing that it corresponds to a recent change of kinematics.</description>
<date>2011</date>
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