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The sub-crustal stress estimation in central Eurasia from gravity, terrain and crustal structure models
Wuhan Univ, Sch Geodesy & Geomat, Key Lab Geospace Environm & Geodesy, 129 Luoyu Rd, Wuhan 430079, Peoples R China, University of West Bohemia.
University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.ORCID iD: 0000-0003-0067-8631
Wuhan Univ, Sch Geodesy & Geomat, Key Lab Geospace Environm & Geodesy, 129 Luoyu Rd, Wuhan 430079, Peoples R China.
2017 (English)In: Geosciences Journal, ISSN 1226-4806, Vol. 21, no 1, 47-54 p.Article in journal (Refereed) Published
Abstract [en]

We investigate the horizontal stress field beneath crustal structures of central Eurasia. The numerical procedure applied for a simultaneous determination of the sub-crustal stress and the crustal thickness from the global gravity, terrain and crustal structure models is based on solving Navier-Stokes' problem which incorporates the inverse solution to the Vening Meinesz- Moritz's problem of isostasy. The numerical results reveal that a spatial distribution of the sub-crustal stress in this study area closely resembles the regional tectonic configuration comprising parts of the Eurasian, Indian and Arabian lithospheric plates. The maximum shear stress intensity is generated by a subduction of the Indian plate beneath the Tibetan block. The intra-plate tectonic configuration is marked by the stress anomalies distributed along major active strike-slip fault systems and sections of subduction which separate the Tibetan and Iranian blocks from the rest of the Eurasian plate. The most pronounced intra-plate stress anomalies are related with a subduction of the Eurasian plate beneath the Tibetan block. We also demonstrate that a prevailing convergent orientation of stress vectors agree with the compressional tectonism of orogenic formations (Himalaya and Tibet Plateau, Than Shan, Zargos and Iranian Plateau), while the extensional tectonism of continental basins (Tarim, Ganges-Brahmaputra, Sichuan) is manifested by a divergence of stress vectors.

Place, publisher, year, edition, pages
Seoul, Korea: Geological Society of Korea , 2017. Vol. 21, no 1, 47-54 p.
Keyword [en]
Crust, gravity, Moho, stress field, Tibet
National Category
Geophysics
Research subject
ENGINEERING
Identifiers
URN: urn:nbn:se:hv:diva-10635DOI: 10.1007/s12303-016-0036-7ISI: 000392346500004Scopus ID: 2-s2.0-85009811548OAI: oai:DiVA.org:hv-10635DiVA: diva2:1069287
Available from: 2017-01-27 Created: 2017-01-27 Last updated: 2017-09-20Bibliographically approved

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CiteExportLink to record
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