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Showing 1 to 7 of 7 for “"Crystallographic Preferred Orientation"”.
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Grain size evolution and strain localization in deformed marbles
… characteristics as grain size and crystallographic preferred orientation (CPO) by combining laboratory studies with field based observations. In Chapter 2, a scaling relationship for recrystallized grain size is derived based on a balance between the rate that mechanical work is …
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Aspects of Deformation and Strain in the Appalachian Fold -Thrust Belt (New York) and the Shear Zones of the Sveconorwegian Orogen (Norway)
… or ambiguous, and quartz does not display crystallographic preferred orientation (even when analyzed by SEM backscatter). The results of this analysis suggest that AMS fabric analysis may provide a promising alternative method for determining lineations, but that its use requires detailed …
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Strain heterogeneity during creep of Carrara marble
… series and Chapter 5 provides a complementary crystallographic analysis and preliminary work regarding modeling of the strain field. The experiments document a progressive transition as temperature increases from 400°C to 700°C , from a regime where twinning is an important mechanism of strain …
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Experimental deformation of forsterite, wadsleyite and ringwoodite: Implications for seismic anisotropy of the Earth’s mantle
… 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. …
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A study of microfabric and structures in glacial ice: insights from Storglaciären, northern Sweden
… significance of commonly described but enigmatic crystallographic ice fabrics and associated structures, with specific examples taken from Storglaciären, a small, polythermal valley glacier in northern Sweden. Characteristic microstructures in deformed ice in valley glaciers and at the base of ice …
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Deformation Mechanisms and Strain Localization in the Mafic Continental Lower Crust
The rheology and strength of the lower crust play a key role in lithosphere dynamics, influencing the orogenic cycle and how plate tectonics work. Despite their geological importance, the processes that cause weakening of the lower crust and strain localization are still poorly understood. Through …
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Single-crystal elasticity of Al-rich phases in the Earth’s transition zone and lower mantle
… to a seismically detectable discontinuity if the crystallographic preferred orientation were favourable. The elastic properties of majoritic garnets and the NAL phase were used along with literature data to invert the seismic velocities for pyrolite, harzburgite and MORB (mid-ocean ridge basalt) …