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<title lang=en>GPS and gravity constraints on continental deformation in the Alborz mountain range, Iran</title>
<creator>Djamour, Y.</creator>
<creator>VERNANT, Philippe</creator>
<creator>Bayer, Roger</creator>
<creator>Nankali, H.</creator>
<creator>RITZ, Jean-francois</creator>
<creator>Hinderer, Jacques</creator>
<creator>Hatam, Yaghoub</creator>
<creator>Luck, Bernard</creator>
<creator>LE MOIGNE, Nicolas</creator>
<creator>Sedighi, Morteza</creator>
<creator>Khorrami, Fateme</creator>
<contributor>National Cartographic Center [Iran] (NCC)</contributor>
<contributor>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)</contributor>
<contributor>Institut de physique du globe de Strasbourg (IPGS) ; Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0956-540X</source>
<source>EISSN: 1365-246X</source>
<source>Geophysical Journal International</source>
<publisher>Oxford University Press (OUP)</publisher>
<identifier>hal-00617146</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617146</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617146v2/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617146/file/djamour2010.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00617146</source>
<source>Geophysical Journal International, Oxford University Press (OUP), 2010, 183 (3), pp.1287-1301. 〈10.1111/j.1365-246X.2010.04811.x〉</source>
<identifier>DOI : 10.1111/j.1365-246X.2010.04811.x</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2010.04811.x</relation>
<language>en</language>
<subject lang=en>Intra-plate processes</subject>
<subject lang=en>Neotectonics</subject>
<subject lang=en>Satellite geodesy</subject>
<subject lang=en>Gravity anomalies and Earth structure</subject>
<subject lang=en>Plate motions</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>A network of 54 survey GPS sites, 28 continuous GPS stations and three absolute gravity (AG) observation sites have been set up in the Alborz mountain range to quantify the present-day kinematics of the range. Our results allow us to accurately estimate the motion of the South Caspian block (SCB) for the first time, and indicate rotation of the SCB relative to Eurasia, accounting for the left lateral motion in the Alborz range. In light of these new results, it clearly appears that deformation rates vary along the range, the eastern part accommodating mainly left lateral strike slip (2 mm yr(-1) south of the range and 5 mm yr(-1) north of the range) with a very low range normal shortening rate on the Khazar thrust fault (similar to 2 mm yr(-1)), and the western part accommodating range normal shortening (similar to 6 mm yr-1) on the Khazar thrust fault with a left lateral component of similar to 2 mm yr(-1) north of the range and 1 mm yr(-1) south of the range. These present-day kinematics agree with geomorphologic estimated slip rates, but not the long-term deformation, corroborating the idea that the kinematics of the range have changed recently due to the change of SCB motion.;Modelling of the interseismic deformation suggests a deep locking depth on the central-western segment of the Khazar fault (similar to 30 km) in agreement with the Baladeh earthquake rupture and aftershock ranging between 10 and 30 km. Given this unusual deep locking depth and the 34 degrees dip of the thrust, a large part of the Alborz range is located above the seismically coupled part of the fault. Based on our AG measurements this part of the range seems to uplift at a rate of 1-5 mm yr(-1), in agreement with terrace uplift.</description>
<date>2010</date>
</dc>
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