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Deforming the upper mantle; olivine mechanical properties and anisotropy

Sylvie Demouchy, Qin Wang and Andrea Tommasi
Deforming the upper mantle; olivine mechanical properties and anisotropy
Elements (June 2023) 19 (3): 151-157

Abstract

The interior of the Earth remains our last terra incognita, inaccessible to direct observations. Our understanding of the deformation of the mantle, which shapes our planet through convection and plate tectonics, is based on analysis of: (1) rare mantle rocks carried to the Earth's surface by volcanic or tectonic processes, (2) the consequences of this deformation on the planet's surface, and (3) geophysical data. These observables combined with laboratory experiments and numerical modeling imply that olivine deforms via the motion of defects within its crystalline structure and along grain boundaries. Ductile deformation by these crystal-scale processes results in anisotropic propagation of seismic waves, which allows us to probe upper-mantle deformation at scales of tens to hundreds of kilometers.


ISSN: 1811-5209
EISSN: 1811-5217
Serial Title: Elements
Serial Volume: 19
Serial Issue: 3
Title: Deforming the upper mantle; olivine mechanical properties and anisotropy
Affiliation: Universite Clermont Auvergne, Laboratoire Magmas et Volcans, Aubiere, France
Pages: 151-157
Published: 202306
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 30
Accession Number: 2024-002711
Categories: Solid-earth geophysicsMineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Nanjing University, Nanjing, CHN, ChinaUniversite de Montpellier, Montpellier, FRA, France
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2024, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2024
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