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Strength and elastic thickness variations in the Arabian Plat: A combination of temperature, composition and strain rates of the lithosphere
- Source :
- Tectonophysics, 746, 398. Elsevier, Tectonophysics
- Publication Year :
- 2018
-
Abstract
- The Arabian Plate shows a strong asymmetry between its Shield and Platform, in terms of topography, seismic velocity and density structure of the upper mantle. This asymmetry also results in significant rheological differences between these blocks, as revealed by the effective elastic thickness (EET) estimates, obtained using a spectral gravity method. However, these estimates may be biased due to various factors: therefore, other approaches based on a direct rheological modeling of the lithospheric structure should be employed to verify these results. In this study, we use a recent model of the lithosphere, based on an integrative interpretation of the gravity field and seismic tomography, to correct an initial thermal model obtained from the inversion of seismic velocity, assuming a uniform composition. The results are used together with the most recent crustal model of the Arabian Plate to construct two alternative models of strength and EET of the lithosphere. The first model (Model I) assumes a constant value of 10ā 15 sā 1 for the strain rates. In the second model (Model II), we used the strain rates obtained from a global mantle flow model. Model I confirms the asymmetry in the rigidity of the Shield and Platform. In contrast, Model II shows that the influence of the variable strain rates causes a significant increase in the strength and EET of the central and eastern part of the Shield and in contrast to previous studies, reveals that most of the Arabian Plate is a long-term stable tectonic feature, predominantly characterized by large EET values (ā„ 70 km). Do you want to read the rest of this article?Request full-text Strength and elastic thickness variations in the Arabian Plate: A combination of temperature, composition and strain rates of the lithosphere. Available from: https://www.researchgate.net/publication/314832634_Strength_and_elastic_thickness_variations_in_the_Arabian_Plate_A_combination_of_temperature_composition_and_strain_rates_of_the_lithosphere [accessed Apr 18, 2017].
- Subjects :
- 010504 meteorology & atmospheric sciences
media_common.quotation_subject
Plate
Inversion (geology)
Geometry
Rigidity (psychology)
010502 geochemistry & geophysics
01 natural sciences
Asymmetry
Strength and effective elastic thickness of the lithosphere
Physics::Geophysics
Gravitational field
Lithosphere
Shield
Lithospheric structure
Geophysic
0105 earth and related environmental sciences
media_common
Earth-Surface Processes
Arabian Plate
Strain rate variations
Geophysics
Arabian
Tectonics
Seismic tomography
Strain rate variation
Geology
Subjects
Details
- Language :
- English
- ISSN :
- 00401951
- Database :
- OpenAIRE
- Journal :
- Tectonophysics, 746, 398. Elsevier, Tectonophysics
- Accession number :
- edsair.doi.dedup.....d4167106f86c411bea3610a31109a7c2