3D crustal and lithospheric model of the Arabia–Eurasia collision zone

Motavalli–Anbaran, Seyed–Hani; Zeyen, Hermann; Jamasb, Ali

doi:10.1016/j.jseaes.2016.03.012

Cited by 26 publications

(21 citation statements)

References 57 publications

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“…Therefore, usually one or two parameters only are determined in such kind of studies. For example, Motavalli‐Anbaran et al (), studying a part of the Arabia‐Eurasia collision zone with limited constraints on the crustal structure determination, restricted their gravity inversion to the Moho and LAB depth determinations. In the present study, we use a joint inversion of seismic tomography, residual (crust‐free) gravity anomalies (Figure b), and residual topography to produce a 3‐D density model of the mantle to a depth of 700 km (Kaban, El Khrepy, et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Diverse Continental Subduction Scenarios Along the Arabia‐Eurasia Collision Zone

Kaban

Petrunin

Khrepy

et al. 2018

Geophysical Research Letters

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It is generally accepted that convergence of the Arabian and African plates is a subduction‐dominated process. However, the subduction scenarios are still debatable. Here we present a 3‐D model of the mantle to a depth of 700 km, based on a joint interpretation of the seismic tomography, residual topography, residual mantle gravity field, and seismicity. At the northwestern edge of the collision zone, we only observe partial underthrust of the Eurasian plate under the West Greater Caucasus. We suggest that this is the initial stage of subduction polarity reversal after the break off of the plate formerly subducted northward. To the southeast, counteracting subduction zones are found beneath northwest Zagros in the south and beneath the East Greater Caucasus and Alborz in the north. This scenario is likely the result of highly buoyant and weak blocks of the Lesser Caucasus, Alborz, and northwest Zagros, which are underlain in the south by the Arabian plate and the Scythian plate and South Caspian from the opposite side. Further to the southeast, a delaminated lithospheric slab is observed under southeast Zagros, while the Arabian and Eurasian plates only partially underthrust East Zagros and Kopet Dagh, respectively. In the southern part of the collision zone under Makran, only remnants of the formerly subducted slabs are found below 200 km.

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Section: Introductionmentioning

confidence: 99%

“…parameters only are determined in such kind of studies. For example,Motavalli-Anbaran et al (2016), studying a part of the Arabia-Eurasia collision zone with limited constraints on the crustal structure determination, restricted their gravity inversion to the Moho and LAB depth determinations. In the present…”

mentioning

confidence: 99%

Diverse Continental Subduction Scenarios Along the Arabia‐Eurasia Collision Zone

Kaban

Petrunin

Khrepy

et al. 2018

Geophysical Research Letters

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“…; Motavalli‐Anbaran et al . ) and, more importantly, simplifying the inverse problem in terms of reducing the number of model parameters appropriately (e.g., Diouane ). Utilisation of these strategies allows the smoothing parameter to be effectively determined by trial and error, which is in fact a common practice in inverse problems (e.g., Motavalli‐Anbaran et al .…”

Section: Inverse Problemmentioning

confidence: 97%

“…; Motavalli‐Anbaran et al . ). Although the difference in gravity effects between a constant‐density crustal model and a linear gradient one is considerable, it is quite small between an exponential‐density crustal model and a linear gradient one for the same average densities (Motavalli‐Anbaran, Zeyen and Ardestani ).…”

Section: Forward Problemmentioning

confidence: 99%

“…In a recent paper, Silva, Santos and Gomes () gave a rather thorough review of such works with main aims directed toward oil prospection. At a larger scale, non‐linear gravity methods could also be used for imaging lateral depth variations of the crust–mantle interface, that is, topography of the Moho boundary (e.g., Motavalli‐Anbaran, Zeyen and Jamasb ).…”

Section: Introductionmentioning

confidence: 99%

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Non‐linear stochastic inversion of gravity data via quantum‐behaved particle swarm optimisation: application to Eurasia–Arabia collision zone (Zagros, Iran)

Jamasb

Motavalli–Anbaran

Zeyen

2017

Geophysical Prospecting

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Potential field data such as geoid and gravity anomalies are globally available and offer valuable information about the Earth's lithosphere especially in areas where seismic data coverage is sparse. For instance, non‐linear inversion of Bouguer anomalies could be used to estimate the crustal structures including variations of the crustal density and of the depth of the crust–mantle boundary, that is, Moho. However, due to non‐linearity of this inverse problem, classical inversion methods would fail whenever there is no reliable initial model. Swarm intelligence algorithms, such as particle swarm optimisation, are a promising alternative to classical inversion methods because the quality of their solutions does not depend on the initial model; they do not use the derivatives of the objective function, hence allowing the use of L1 norm; and finally, they are global search methods, meaning, the problem could be non‐convex. In this paper, quantum‐behaved particle swarm, a probabilistic swarm intelligence‐like algorithm, is used to solve the non‐linear gravity inverse problem. The method is first successfully tested on a realistic synthetic crustal model with a linear vertical density gradient and lateral density and depth variations at the base of crust in the presence of white Gaussian noise. Then, it is applied to the EIGEN 6c4, a combined global gravity model, to estimate the depth to the base of the crust and the mean density contrast between the crust and the upper‐mantle lithosphere in the Eurasia–Arabia continental collision zone along a 400 km profile crossing the Zagros Mountains (Iran). The results agree well with previously published works including both seismic and potential field studies.

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Building a Young Mountain Range: Insight into the Growth of the Greater Caucasus Mountains from Detrital Zircon (U-Th)/He Thermochronology and 10Be Erosion Rates

Forte

Gutterman

Soest

et al. 2021

Preprint

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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3D crustal and lithospheric model of the Arabia–Eurasia collision zone

Cited by 26 publications

References 57 publications

Diverse Continental Subduction Scenarios Along the Arabia‐Eurasia Collision Zone

Diverse Continental Subduction Scenarios Along the Arabia‐Eurasia Collision Zone

Non‐linear stochastic inversion of gravity data via quantum‐behaved particle swarm optimisation: application to Eurasia–Arabia collision zone (Zagros, Iran)

Building a Young Mountain Range: Insight into the Growth of the Greater Caucasus Mountains from Detrital Zircon (U-Th)/He Thermochronology and 10Be Erosion Rates

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