TY - JOUR A1 - Donner, Stefanie A1 - Rößler, Dirk A1 - Krüger, Frank A1 - Ghods, Abdolreza A1 - Strecker, Manfred T1 - Segmented seismicity of the M (w) 6.2 Baladeh earthquake sequence (Alborz Mountains, Iran) revealed from regional moment tensors JF - Journal of seismology N2 - The M (w) 6.2 Baladeh earthquake occurred on 28 May 2004 in the Alborz Mountains, northern Iran. This earthquake was the first strong shock in this intracontinental orogen for which digital regional broadband data are available. The Baladeh event provides a rare opportunity to study fault geometry and ongoing deformation processes using modern seismological methods. A joint inversion for hypocentres and a velocity model plus a surface-wave group dispersion curve analysis were used to obtain an adapted velocity model, customised for mid- and long-period waveform modelling. Based on the new velocity model, regional waveform data of the mainshock and larger aftershocks (M (w) a parts per thousand yen3.3) were inverted for moment tensors. For the Baladeh mainshock, this included inversion for kinematic parameters. All analysed earthquakes show dominant thrust mechanisms at depths between 14 and 26 km, with NW-SE striking fault planes. The mainshock ruptured a 28A degrees south-dipping area of 24 x 21 km along a north-easterly direction. The rupture plane of the mainshock does not coincide with the aftershock distribution, neither in map view nor with respect to depth. The considered aftershocks form two main clusters. The eastern cluster is associated with the mainshock. The western cluster does not appear to be connected with the rupture plane of the mainshock but, instead, indicates a second activated fault plane dipping at 85A degrees towards the north. KW - Alborz Mountains KW - Iran KW - Baladeh earthquake KW - Inversion for moment tensors KW - Seismotectonics Y1 - 2013 U6 - https://doi.org/10.1007/s10950-013-9362-7 SN - 1383-4649 VL - 17 IS - 3 SP - 925 EP - 959 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Dörfler, Thomas T1 - Die Sanktionsausschüsse zwischen Macht und Regeln T1 - Sanctions Committees Caught between Power and Rules JF - Vereinte Nationen : Zeitschrift für die Vereinten Nationen und ihre Sonderorganisationen N2 - Sanktionen sind ein wichtiges Instrument des UN-Sicherheitsrats zur Erhaltung des Weltfriedens. Viele zentrale Entscheidungen, wie etwa die Listung und Entlistung terrorverdächtiger Personen, werden fernab der Öffentlichkeit in Sanktionsausschüssen getroffen. Die Einsetzung dieser Ausschüsse hat die Entscheidungsdynamiken im Rat erheblich verändert. N2 - Sanctions are an important instrument of the United Nations Security Council to maintain international peace and security. The Council, however, transfers many decisions, such as the listing and delisting of individuals suspected of supporting terrorism, to its subsidiary sanctions committees, mostly beyond public scrutiny. The article explores, how the creation of sanctions committees has changed decision-making dynamics, how committee members can be committed to rules and what this might imply for Germany’s future role on the Council. KW - Al-Qaida KW - Iran KW - Sanktionen KW - Sicherheitsrat KW - Sudan KW - UN Security Council KW - Terrorismus KW - sanctions committee Y1 - 2018 SN - 0042-384X SN - 2366-6773 VL - 66 IS - 2 SP - 62 EP - 66 PB - BWV CY - Berlin ER - TY - JOUR A1 - Jikeli, Günther T1 - Antisemitism in muslim communities and muslim countries: debates and studies of a complex issue JF - REVUE D HISTOIRE MODERNE ET CONTEMPORAINE N2 - In this article, I discuss surveys, academic debates, and research on antisemitism among Muslims in Muslim-majority countries and in Europe today. After a review of antisemitism in both cases, different explanations for its causes are presented. Negative attitudes towards Jews in Muslim countries are the rule, not the exception. An important factor in almost all Muslim countries are anti-Zionist attitudes and agitations that are mixed with antisemitic stereotypes and conspiracy theories. In Europe, antisemitism is more prevalent among Muslims than among non-Muslims and Muslims are disproportionately often involved in antisemitic incidents. It turns out that antisemitism among Muslims is manifested in many ways and that it has many causes. One-dimensional explanations are not sufficient. Arguments that antisemitism is primarily a result of the Middle East conflict or of discrimination/colonization seem to be outdated in view of new research. Historically, the interaction of Arab nationalism, Islamist movements, and the collaboration with the Nazis in the middle of the 20th century played a significant role in ensuring that the discriminatory treatment of Jews in Islam in the Middle Ages did not disappear in the course of establishing nation states, but was converted to a large extent into antisemitism. Today, Islamist influences and stereotypes that are passed on by media and within social circles are essential factors for the prevalence of antisemitic attitudes among Muslims. KW - antisemitism KW - muslim KW - arab KW - Iran KW - Turkey KW - islam Y1 - 2015 SN - 0048-8003 VL - 62 IS - 2-3 SP - 89 EP - 114 PB - SOC HISTOIRE MODERNE CONTEMPORAINE CY - Paris ER - TY - JOUR A1 - Landgraf, Angela A1 - Zielke, Olaf A1 - Arrowsmith, J. Ramón A1 - Ballato, Paolo A1 - Strecker, Manfred A1 - Schildgen, Taylor F. A1 - Friedrich, Anke M. A1 - Tabatabaei, Sayyed-Hassan T1 - Differentiating simple and composite tectonic landscapes using numerical fault slip modeling with an example from the south central Alborz Mountains, Iran JF - Journal of geophysical research : Earth surface N2 - The tectonically driven growth of mountains reflects the characteristics of the underlying fault systems and the applied tectonic forces. Over time, fault networks might be relatively static, but stress conditions could change and result in variations in fault slip orientation. Such a tectonic landscape would transition from a simple to a composite state: the topography of simple landscapes is correlated with a single set of tectonic boundary conditions, while composite landscapes contain inherited topography due to earlier deformation under different boundary conditions. We use fault interaction modeling to compare vertical displacement fields with topographic metrics to differentiate the two types of landscapes. By successively rotating the axis of maximum horizontal stress, we produce a suite of vertical displacement fields for comparison with real landscapes. We apply this model to a transpressional duplex in the south central Alborz Mountains of Iran, where NW oriented compression was superseded by neotectonic NE compression. The consistency between the modeled displacement field and real landforms indicates that the duplex topography is mostly compatible with the modern boundary conditions, but might include a small remnant from the earlier deformation phase. Our approach is applicable for various tectonic settings and represents an approach to identify the changing boundary conditions that produce composite landscapes. It may be particularly useful for identifying changes that occurred in regions where river profiles may no longer record a signal of the change or where the spatial pattern of uplift is complex. KW - fault interaction KW - landscape evolution KW - numerical modeling KW - Alborz Mountains KW - Iran Y1 - 2013 U6 - https://doi.org/10.1002/jgrf.20109 SN - 2169-9003 SN - 2169-9011 VL - 118 IS - 3 SP - 1792 EP - 1805 PB - American Geophysical Union CY - Washington ER - TY - BOOK A1 - Naderi, Ahmad A1 - Reissner, Johannes T1 - Schiitische Geopolitik? : zur Politik Irans im Nahen und Mittleren Osten T3 - WeltTrends Spezial N2 - Aufgrund seines umstrittenen Atomprogramms ist der Iran ein Dauerbrenner in den Medien. Doch nicht nur deshalb sollte das Land Beachtung finden. Ahmad Naderi gewährt uns einen Blick auf die Geopolitik des Iran, der besonders für die in vielen arabischen Staaten unterdrückten Schiiten Orientierungspunkt sein will. Doch strebt das Land die Hegemonie in der Region an? Johannes Reissner (1949-2009) analysiert das Selbstverständnis des Iran und seine Verhaltensmuster. Sollte der Westen seine Politik überdenken? KW - Geopolitik KW - Iran KW - Naher Osten KW - Geopolitics KW - Iran KW - Middle East Y1 - 2012 SN - 978-3-941880-40-5 SN - 2193-0627 IS - 7 PB - Welt Trends e.V CY - Potsdam ER - TY - JOUR A1 - Omrani, Hadi A1 - Moazzen, Mohssen A1 - Oberhänsli, Roland T1 - Geodynamic evolution of the Sabzevar zone, northern central Iranian micro-continent JF - Mineralogy and petrology N2 - The Northern Central Iranian Micro-continent (CIM) represents Neotethys-related oceanic crust remnants, emplaced due to convergence between CIM and Eurasia plates during Eocene. Mafic and ultramafic units are exposed along the northern part of the CIM in the Sabzevar area. The geology and field relation of Sabzevar ophiolite indicate northward subduction of the Sabzevar basin. The average whole rock chemistry of mafic (gabbros) and ultramafic samples (lherzolite, harzburgite and dunite) is characterized by a range of MgO of 11.16-31.88, CaO 5.22-11.53 and Al2O3 2.77-14.57, respectively. Low LREE/HREE ratio of ultramafic samples is accompanied by enrichment of large ion lithophile elements (LILE) such as Sr, Pb and K. Mafic samples show two distinct groups with low and high LREE/HREE ratios. The spider diagram of mafic samples indicates enrichment in Sr, Pb and K and depletion in REE. Petrological and geochemical evidence and field relations show that the mafic rocks formed in a supra-subduction zone setting. Petrological studies reveal the role of fractional crystallization and assimilation effect by released fluids during subduction related generation of the Sabzevar mafic rocks. We suggest that the studied mafic rocks likely represent the basement of an initial island arc, which was generated in a supra-subduction zone setting within the Neotethys branch of the Sabzevar Ocean at the north of CIM. Copper, gold and chromite mineralizations are studied in relation to island arc setting and supra-subduction environment. Similarities in lithology, ophiolite age and mineralization between Sabzevar ophiolite and Bardaskan-Torbat Heydariyeh ophiolites testify for their separation due to rotation (or faulting) of the Central Iranian Micro-continent. KW - Supra-subduction zone KW - Ophiolite KW - Island arc KW - Mineralization KW - Neotethys KW - Iran Y1 - 2017 U6 - https://doi.org/10.1007/s00710-017-0505-3 SN - 0930-0708 SN - 1438-1168 VL - 112 IS - 1 SP - 65 EP - 83 PB - Springer CY - Wien ER - TY - JOUR A1 - Omrani, Hadi A1 - Moazzen, Mohssen A1 - Oberhänsli, Roland A1 - Altenberger, Uwe A1 - Lange, Manuela T1 - The Sabzevar blueschists of the North-Central Iranian micro-continent as remnants of the Neotethys-related oceanic crust subduction JF - International journal of earth sciences N2 - The Sabzevar ophiolites mark the Neotethys suture in east-north-central Iran. The Sabzevar metamorphic rocks, as part of the Cretaceous Sabzevar ophiolitic complex, consist of blueschist, amphibolite and greenschist. The Sabzevar blueschists contain sodic amphibole, epidote, phengite, calcite +/- A omphacite +/- A quartz. The epidote amphibolite is composed of sodic-calcic amphibole, epidote, albite, phengite, quartz +/- A omphacite, ilmenite and titanite. The greenschist contains chlorite, plagioclase and pyrite, as main minerals. Thermobarometry of a blueschist yields a pressure of 13-15.5 kbar at temperatures of 420-500 A degrees C. Peak metamorphic temperature/depth ratios were low (similar to 12 A degrees C/km), consistent with metamorphism in a subduction zone. The presence of epidote in the blueschist shows that the rocks were metamorphosed entirely within the epidote stability field. Amphibole schist samples experienced pressures of 5-7 kbar and temperatures between 450 and 550 A degrees C. The presence of chlorite, actinolite, biotite and titanite indicate greenschist facies metamorphism. Chlorite, albite and biotite replacing garnet or glaucophane suggests temperatures of > 300 A degrees C for greenschist facies. The formation of high-pressure metamorphic rocks is related to north-east-dipping subduction of the Neotethys oceanic crust and subsequent closure during lower Eocene between the Central Iranian Micro-continent and Eurasia (North Iran). KW - Central Iranian micro-continent (CIM) KW - Neotethys Ocean KW - Glaucophane schist KW - Sabzevar KW - Iran Y1 - 2013 U6 - https://doi.org/10.1007/s00531-013-0881-9 SN - 1437-3254 VL - 102 IS - 5 SP - 1491 EP - 1512 PB - Springer CY - New York ER - TY - JOUR A1 - Omrani, Hadi A1 - Moazzen, Mohssen A1 - Oberhänsli, Roland A1 - Moslempour, Mohammad Elyas T1 - Iranshahr blueschist: subduction of the inner Makran oceanic crust JF - Journal of metamorphic geology N2 - The Makran accretionary prism in SE Iran and SW Pakistan is one of the most extensive subduction accretions on Earth. It is characterized by intense folding, thrust faulting and dislocation of the Cenozoic units that consist of sedimentary, igneous and metamorphic rocks. Rock units forming the northern Makran ophiolites are amalgamated as a melange. Metamorphic rocks, including greenschist, amphibolite and blueschist, resulted from metamorphism of mafic rocks and serpentinites. In spite of the geodynamic significance of blueschist in this area, it has been rarely studied. Peak metamorphic phases of the northern Makran mafic blueschist in the Iranshahr area are glaucophane, phengite, quartz +/- omphacite+epidote. Post peak minerals are chlorite, albite and calcic amphibole. Blueschist facies metasedimentary rocks contain garnet, phengite, albite and epidote in the matrix and as inclusions in glaucophane. The calculated P-T pseudosection for a representative metabasic glaucophane schist yields peak pressure and temperature of 11.5-15kbar at 400-510 degrees C. These rocks experienced retrograde metamorphism from blueschist to greenschist facies (350-450 degrees C and 7-8kbar) during exhumation. A back arc basin was formed due to northward subduction of Neotethys under Eurasia (Lut block). Exhumation of the high-pressure metamorphic rocks in northern Makran occurred contemporarily with subduction. Several reverse faults played an important role in exhumation of the ophiolitic and HP-LT rocks. The presence of serpentinite shows the possible role of a serpentinite diapir for exhumation of the blueschist. A tectonic model is proposed here for metamorphism and exhumation of oceanic crust and accretionary sedimentary rocks of the Makran area. Vast accretion of subducted materials caused southward migration of the shore. KW - back arc basin KW - Bajgan/Durkan KW - HP-LT metamorphic rocks KW - Iran KW - Lut Blocks KW - Northern Makran KW - subduction and exhumation Y1 - 2017 U6 - https://doi.org/10.1111/jmg.12236 SN - 0263-4929 SN - 1525-1314 VL - 35 SP - 373 EP - 392 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Saki, A. A1 - Moazzen, Mohssen A1 - Oberhänsli, Roland T1 - P-T evolution of the precambrian metamorphic complex, NW Iran a study of metapelitic rocks JF - Geological journal N2 - The Mahneshan Metamorphic Complex (MMC) is one of the Precambrian terrains exposed in the northwest of Iran. The MMC underwent two main phases of deformation (D-1 and D-2) and at least two metamorphic events (M-1 and M-2). Critical metamorphic mineral assemblages in the metapelitic rocks testify to regional metamorphism under amphibolite-facies conditions. The dominant metamorphic mineral assemblage in metapelitic rocks (M-1) is muscovite, biotite I, Garnet I, staurolite, Andalusite I and sillimanite. Peak metamorphism took place at 600-620 degrees C and similar to 7 kbar, corresponding to a depth of ca. 24 km. This was followed by decompression during exhumation of the crustal rocks up to the surface. The decrease of temperature and pressure during exhumation produced retrograde metamorphic assemblages (M-2). Secondary phases such as garnet II biotite It. Andalusite II constrain the temperature and pressure of M, retrograde metamorphism to 520-560 degrees C and 2.5-3.5 kbar, respectively. The geothermal gradient obtained for the peak of metamorphism is 33 degrees C km(-1), which indicates that peak metamorphism was of Barrovian type and occurred under medium-pressure conditions. The MMC followed a 'clockwise' P T path during metamorphism, consistent with thermal relaxation following tectonic thickening. The bulk chemistry of the MMC metapelites shows that their protoliths were deposited at an active continental margin. Together with the presence of palaeo-suture zones and ophiolitic rocks around the high-grade metamorphic rocks of the MMC, these features suggest that the Iranian Precambrian basement formed by an island-arc type cratonization. KW - Mahneshan Metamorphic Complex KW - Iran KW - metapelitic rock KW - bulk chemistry KW - Barrovian-type metamorphism KW - clockwise P-T path Y1 - 2011 U6 - https://doi.org/10.1002/gj.1236 SN - 0072-1050 VL - 46 IS - 1 SP - 10 EP - 25 PB - Wiley-Blackwell CY - Malden ER - TY - JOUR A1 - Salamat, Mona A1 - Zöller, Gert A1 - Amini, Morteza T1 - Prediction of the Maximum Expected Earthquake Magnitude in Iran: BT - from a Catalog with Varying Magnitude of Completeness and Uncertain Magnitudes JF - Pure and applied geophysics N2 - This paper concerns the problem of predicting the maximum expected earthquake magnitude μ in a future time interval Tf given a catalog covering a time period T in the past. Different studies show the divergence of the confidence interval of the maximum possible earthquake magnitude m_{ max } for high levels of confidence (Salamat et al. 2017). Therefore, m_{ max } should be better replaced by μ (Holschneider et al. 2011). In a previous study (Salamat et al. 2018), μ is estimated for an instrumental earthquake catalog of Iran from 1900 onwards with a constant level of completeness ( {m0 = 5.5} ). In the current study, the Bayesian methodology developed by Zöller et al. (2014, 2015) is applied for the purpose of predicting μ based on the catalog consisting of both historical and instrumental parts. The catalog is first subdivided into six subcatalogs corresponding to six seismotectonic zones, and each of those zone catalogs is subsequently subdivided according to changes in completeness level and magnitude uncertainty. For this, broad and small error distributions are considered for historical and instrumental earthquakes, respectively. We assume that earthquakes follow a Poisson process in time and Gutenberg-Richter law in the magnitude domain with a priori unknown a and b values which are first estimated by Bayes' theorem and subsequently used to estimate μ. Imposing different values of m_{ max } for different seismotectonic zones namely Alborz, Azerbaijan, Central Iran, Zagros, Kopet Dagh and Makran, the results show considerable probabilities for the occurrence of earthquakes with Mw ≥ 7.5 in short Tf , whereas for long Tf, μ is almost equal to m_{ max } KW - Maximum expected earthquake magnitude KW - completeness levels KW - magnitude errors KW - Bayesian method KW - Iran Y1 - 2019 U6 - https://doi.org/10.1007/s00024-019-02141-3 SN - 0033-4553 SN - 1420-9136 VL - 176 IS - 8 SP - 3425 EP - 3438 PB - Springer CY - Basel ER -