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• W432824841 abstract "The rheological properties of the major minerals of the Earth’s mantle are still not well constrained. However, these properties are crucial for the understanding of a wide range of processes in the Earth’s interior such as mantle convection. The purpose of this work is to address the issue of the rheology of the lowermost upper mantle and of the transition zone through the mechanical properties at high pressure of olivine (with forsterite composition Mg2SiO4) and of its high-pressure polymorphs wadsleyite and ringwoodite. Indeed, the properties of the Earth’s mantle can be inferred as a first approximation from the mechanical properties of those polymorphs which volumetrically dominate the mineralogy of the region of concern. Deformation experiments have been performed on hot-pressed forsterite samples and on pre-synthesized wadsleyite and ringwoodite samples under pressure conditions of the Earth’s mantle and at 1300-1400°C. The possible influence of the phase transformation from forsterite to wadsleyite on rheology has been also investigated. Deformation has been achieved by shear using the Kawai-type multianvil apparatus. Complementary experiments on forsterite have been performed in the newly developed Deformation-DIA. Some of them have been carried out on a synchrotron beam line to perform in-situ stress and strain measurements. In order to gain a maximum of information on the deformation mechanisms and on the Crystallographic Preferred Orientation (CPO), a special attention has been devoted to the microstructural characterisation of the samples. Electron BackScattering Diffraction (ESBD) and Transmission Electron Microscope (TEM) have been mainly used. An important pressure-induced change in deformation mechanism is shown in forsterite. The deformation of forsterite at high pressure and temperature is dominated by the [001]{hk0} slip system rather than the [100](010) glide which is extensively observed at low pressure and high temperature.. Concerning the high-pressure polymorphs, their plastic behaviour has been studied with a strong emphasis on the formation of CPO. ViscoPlastic Self Consistent (VPSC) modelling is used to link the CPO with known elementary deformation mechanisms of these phases. The main features of the CPO of wadsleyite are characterized by the alignment of the [100] axes parallel to the shear direction and the alignment of the [001] axes toward the normal to the shear plane. Too many uncertainties remain on the ringwoodite CPO for them being used to interpret seismic anisotropy. Finally, we suggest that strain-induced CPO might be responsible for the seismic anisotropy observed in the lowermost upper mantle and in the upper part of the transition zone. The low seismic anisotropy of the lowermost upper mantle can be explained from the slip system change in forsterite and the CPO of wadsleyite point toward a dominant tangential flow in the upper part of the transition zone.%%%%Die rheologischen Eigenschaften der Hauptminerale des Erdmantels sind derzeit nahezu unbekannt. Die Kenntnis dieser…" @default.
• W432824841 created "2016-06-24" @default.
• W432824841 creator A5089198889 @default.
• W432824841 date "2004-01-01" @default.
• W432824841 modified "2023-09-25" @default.
• W432824841 title "Experimental deformation of forsterite, wadsleyite and ringwoodite: Implications for seismic anisotropy of the Earth’s mantle" @default.
• W432824841 cites W103164423 @default.
• W432824841 cites W1511580392 @default.
• W432824841 cites W1547490889 @default.
• W432824841 cites W1565768895 @default.
• W432824841 cites W1573518933 @default.
• W432824841 cites W1588546302 @default.
• W432824841 cites W1599507010 @default.
• W432824841 cites W1599989364 @default.
• W432824841 cites W1605517020 @default.
• W432824841 cites W1659330243 @default.
• W432824841 cites W1659665089 @default.
• W432824841 cites W182965636 @default.
• W432824841 cites W1963956932 @default.
• W432824841 cites W1965812245 @default.
• W432824841 cites W1969987170 @default.
• W432824841 cites W1970375366 @default.
• W432824841 cites W1971596006 @default.
• W432824841 cites W1971768477 @default.
• W432824841 cites W1972194735 @default.
• W432824841 cites W1972445448 @default.
• W432824841 cites W1989240732 @default.
• W432824841 cites W1991373662 @default.
• W432824841 cites W1991404883 @default.
• W432824841 cites W1991651442 @default.
• W432824841 cites W1991824779 @default.
• W432824841 cites W1992584191 @default.
• W432824841 cites W1993303597 @default.
• W432824841 cites W1994609681 @default.
• W432824841 cites W1995448308 @default.
• W432824841 cites W1995988653 @default.
• W432824841 cites W1996078574 @default.
• W432824841 cites W1997652591 @default.
• W432824841 cites W1998107551 @default.
• W432824841 cites W2000766983 @default.
• W432824841 cites W2002947445 @default.
• W432824841 cites W2003831022 @default.
• W432824841 cites W2004761531 @default.
• W432824841 cites W2005795881 @default.
• W432824841 cites W2007395042 @default.
• W432824841 cites W2009626931 @default.
• W432824841 cites W2010501396 @default.
• W432824841 cites W2011340388 @default.
• W432824841 cites W2013875203 @default.
• W432824841 cites W2015014198 @default.
• W432824841 cites W2015064905 @default.
• W432824841 cites W2016486587 @default.
• W432824841 cites W2023088951 @default.
• W432824841 cites W2024565766 @default.
• W432824841 cites W2027496031 @default.
• W432824841 cites W2030915589 @default.
• W432824841 cites W2031084439 @default.
• W432824841 cites W2032271723 @default.
• W432824841 cites W2033278922 @default.
• W432824841 cites W2034989233 @default.
• W432824841 cites W2036046598 @default.
• W432824841 cites W2038669248 @default.
• W432824841 cites W2039703165 @default.
• W432824841 cites W2040432202 @default.
• W432824841 cites W2040599524 @default.
• W432824841 cites W2042071294 @default.
• W432824841 cites W2043476783 @default.
• W432824841 cites W2046769786 @default.
• W432824841 cites W2051492245 @default.
• W432824841 cites W2051748599 @default.
• W432824841 cites W2054092349 @default.
• W432824841 cites W2055858362 @default.
• W432824841 cites W2056128551 @default.
• W432824841 cites W2057147572 @default.
• W432824841 cites W2057633554 @default.
• W432824841 cites W2057983855 @default.
• W432824841 cites W2059239104 @default.
• W432824841 cites W2061656557 @default.
• W432824841 cites W2062013202 @default.
• W432824841 cites W2062018184 @default.
• W432824841 cites W2062221814 @default.
• W432824841 cites W2063614849 @default.
• W432824841 cites W2064252656 @default.
• W432824841 cites W2065051607 @default.
• W432824841 cites W2065686858 @default.
• W432824841 cites W2066047256 @default.
• W432824841 cites W2067115174 @default.
• W432824841 cites W2075685970 @default.
• W432824841 cites W2077318864 @default.
• W432824841 cites W2080200735 @default.
• W432824841 cites W2080503557 @default.
• W432824841 cites W2083096214 @default.
• W432824841 cites W2083103348 @default.
• W432824841 cites W2083106964 @default.
• W432824841 cites W2085107735 @default.
• W432824841 cites W2086300439 @default.
• W432824841 cites W2086569736 @default.
• W432824841 cites W2092074977 @default.
• W432824841 cites W2094035611 @default.
• W432824841 cites W2102712153 @default.

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