Shear coupled grain boundary migration as a deformation mechanism in minerals

Autor: Gill Pennock, Martyn R. Drury

A grain boundary can move under stress by a mechanism called shear coupled grain boundary migration (SC GBM) and contribute to strain. SC GBM is considered to be a general property of all grain boundaries over a wide range of misorientation angles, a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16b1caeaabcc2a12d535403a061db749
https://doi.org/10.5194/egusphere-egu2020-7681

Using a composite flow law to model deformation in the NEEM deep ice core, Greenland - Part 1: The role of grain size and grain size distribution on deformation of the upper 2207 m

Autor: Daniela Jansen, Gill Pennock, Ernst-Jan Kuiper, Johannes H. P. de Bresser, Ilka Weikusat, Martyn R. Drury

Publikováno v: EPIC3The Cryosphere, EGU, 14(7), pp. 2429-2448
Cryosphere, 14(7), 2429. Copernicus Publications
The Cryosphere, Vol 14, Pp 2429-2448 (2020)

The effect of grain size on strain rate of ice in the upper 2207 m in the North Greenland Eemian Ice Drilling (NEEM) deep ice core was investigated using a rheological model based on the composite flow law of Goldsby and Kohlstedt (1997, 2001). The g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92e827d5a9839be4aee37a752a10f1d1
https://doi.org/10.5194/tc-14-2429-2020

The Relevance of Grain Dissection for Grain Size Reduction in Polar Ice: Insights from Numerical Models and Ice Core Microstructure Analysis

Autor: Ernst Jan N. Kuiper, Gill Pennock, Ilka Weikusat, Paul D. Bons, Jan Eichler, Florian Steinbach, Albert Griera, Martyn R. Drury

Publikováno v: Frontiers in Earth Science, 5. Frontiers Research Foundation
EPIC3Frontiers in Earth Science, Frontiers Media S.A., 5, pp. 66, ISSN: 2296-6463
Frontiers in Earth Science, Vol 5 (2017)

The flow of ice depends on the properties of the aggregate of individual ice crystals, such as grain size or lattice orientation distributions. Therefore, an understanding of the processes controlling ice micro-dynamics is needed to ultimately develo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e53b973c8e58f27db8935379a32832e1
https://doi.org/10.3389/feart.2017.00066

Influence of deformation conditions on the development of heterogeneous recrystallization microstructures in experimentally deformed Carrara marble

Autor: Gill Pennock, S.L.A. Valcke, Martyn R. Drury, J. H. P. De Bresser

Publikováno v: Geological Society, London, Special Publications. 409:175-200

Recrystallized grains are potentially useful as indicators of palaeostress in naturally deformed rocks, providing that well-calibrated relationships (palaeopiezometers) exist between the recrystallized grain size and stress. Rocks can exhibit microst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::facde3ae233f82a3aff35623cc9fddda
https://doi.org/10.1144/sp409.4

Quantifying Heterogeneous Microstructures: Core and Mantle Subgrains in Deformed Calcite

Autor: J. H. P. De Bresser, S.L.A. Valcke, Gill Pennock, Martyn R. Drury

Publikováno v: Materials Science Forum. 550:307-312

Calcite deformed by high temperature creep develops a heterogeneous microstructure consisting of deformed and recrystallised grains. The deformed grains either contain homogeneously distributed subgrains of similar size, or heterogeneously distribute

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1c1f821adf5806d9df43e25df25281a9
https://doi.org/10.4028/www.scientific.net/msf.550.307