Talks and Posters

A. M. Walker, A. Nowacki, D. Dobson and, and J.Wookey (2016) "Models of deformation and texture inheritance at the base of the mantle" SEDI 2016, Nantes, France.

A. Lee, A. M. Walker, G. Lloyd and T. Torvela (2016) "Partial melt and seismic properties: A case study from i the Seiland Igneous Province" EGU General Assembly 2016, Vienna, Austria. Geophysical Research Abstracts 18, EGU2016-14097.

A. N. Kravtsova, A. V. Soldatov, A. M. Walker and A. J. Berry (2015) "Diagnostics of Ti environment in hibonite: X-ray investigation and computer modeling", XAFS16, Karisruhe, Germany.

A. M. Walker, H. Davies, R. Davies and J.Wookey (2015) "Linking TERRA and DRex to relate mantle convection and seismic anisotropy" EGU General Assembly 2015, Vienna, Austria. Geophysical Research Abstracts 17, EGU2015-10034.

N. Goulding, N. Ribe, O. Castelnau, A. M. Walker and J. Wookey (2015) "ANPAR: a new analytical parameterization of CPO generation in the mantle" EGU General Assembly 2015, Vienna, Austria. Geophysical Research Abstracts 17, EGU2015-7317.

A. Lee, T. Torvela, G. Lloyd and A. M. Walker (2015) "Are seismic wave velocities and anisotropies reliable proxies for partial melts?" EGU General Assembly 2015, Vienna, Austria. Geophysical Research Abstracts 17, EGU2015-11660-1.

J. F. Di Leo, Z. H. Li, N. M. Ribe, A. M. Walker, J. Wookey, and J.-M. Kendall (2014) "Circum-Slab Mantle Deformation: Insights from Finite Strain and Seismic Anisotropy" EOS Transactions of the AGU, fall meeting supplement, abstract T53E-02.

T. Nagaya, A. M. Walker, J. Wookey, J.-M. Kendall and S. Wallis (2014) "Seismology in Ryukyu arc, Japan reveals the distribution and orientation of serpentine minerals suggesting convection and low viscosity of forearc mantle" EOS Transactions of the AGU, fall meeting supplement, abstract T51B-4623.

N. M. Ribe, N. Goulding, O. Castelnau, A. M. Walker and J. Wookey (2014) "Analytical parameterization of self-consistent polycrystal mechanics" EOS Transactions of the AGU, fall meeting supplement, abstract DI21B-04.

S. A. Hunt, A. M. Walker, O. T. Lord, S. Stackhouse, L. S. Armstrong, A. J. Parsons, G. E. Lloyd, and M. L. Whitaker (2014) "Anelasticity of the HCP Metal Zinc: a Key to Understanding the Dynamics of Earths Core" EOS Transactions of the AGU, fall meeting supplement, abstract DI31A-4252.

J. Walpole, J. Wookey, A. Nowacki, A. M. Walker, J.-M. Kendall, G. Masters and A. M. Forte (2014) "Anisotropy in the lowermost mantle beneath the circum-Pacific: observations and modelling" EOS Transactions of the AGU, fall meeting supplement, abstract DI23A-4286.

A. M. Walker and T. Elliott (2014) "Fractionation of magnesium isotopes in the lower mantle: insights from density functional theory", Deep Earth Processes: windows on the working of a planet. London, UK.

S. Hunt, A. M. Walker, O. Lord and M. Whitaker (2014) "Anelasticity of the HCP metal Zinc: a key to understanding the dynamics of Earth's core", Deep Earth Processes: windows on the working of a planet. London, UK.

S. Stackhouse, M. Ammann, J. Brodholt, D. Dobson, A. M. Forte, J.-M. Kendall, G. D. Price, A. M. Walker and J. Wookey (2014) "Post-perovskite at ten years: theoretical insights into its physical properties", PPV@10 a meeting to celebrate the tenth anniversary of the discovery of post-perovskite. Bristol, UK.

N. J. Goulding, N. M. Ribe, O. Castelnau, A. M. Walker and J. Wookey (2014) "Analytical parameterization of self-consistent polycrystal mechanics", PPV@10 a meeting to celebrate the tenth anniversary of the discovery of post-perovskite. Bristol, UK.

S. A. Hunt, A. M. Walker and E. Mariani (2014) "Rate of texture development in post-perovskite", PPV@10 a meeting to celebrate the tenth anniversary of the discovery of post-perovskite. Bristol, UK.

J. Walpole, J. Wookey, A. Nowacki and A. M. Walker (2014) "Post-perovskite deformation in the lowermost mantle: constraints from seismic anisotropy", PPV@10 a meeting to celebrate the tenth anniversary of the discovery of post-perovskite. Bristol, UK.

A. M. Walker, A. Nowacki, J. Wookey, J. Walpole, N. Goulding and J.-M. Kendall (2014) "Modelling the tectonics of the lowermost mantle", PPV@10 a meeting to celebrate the tenth anniversary of the discovery of post-perovskite. Bristol, UK.

J. Di Leo, A. M. Walker, Z.-H. Li, J. Wookey, N. Ribe, J.-M. Kendall and A. Tommasi (2014) "Seismic anisotropy and texture development during early stages of subduction", EGU General Assembly 2014, Vienna, Austria. Geophysical Research Abstracts 16, EGU2014-12111.

A. M. Walker, D. P. Dobson, A. Nowacki, J. Wookey, A. M. Forte and J.-M. Kendall (2013) "Simulating the Seismic Signal of Phase Transitions in the Deepest Mantle", EOS Transactions of the AGU, fall meeting supplement, abstract DI34A-02 (invited).

J. F. Di Leo, A. M. Walker, Z.-H. Li, J. Wookey, N. M. Ribe and J.-M. Kendall (2013) "Evolution of texture and seismic anisotropy during subduction", EOS Transactions of the AGU, fall meeting supplement, abstract DI21C-08.

A. Nowacki, A. M. Walker, J. Wookey and J.-M. Kendall (2013) "Anisotropy in the lowermost mantle: to the limits of ray theory (and beyond)", EOS Transactions of the AGU, fall meeting supplement, abstract DI22A-05.

A. Nowacki, J. Walpole, J. M. Wookey, A. M. Walker, A. M. Forte, G. Masters and J.-M. Kendall (2013) "The feasibility of inverting for flow in the lowermost mantle", EOS Transactions of the AGU, fall meeting supplement, abstract DI41B-05.

J.-M. Kendall, A. F. Baird, A. M. Walker, J. Wookey, G. E. Lloyd, G. W. Stuart, S. Harland, R. W. Obbard, A. Smith and A. Brisbourne (2013) "Seismic anisotropy in ice: numerical modelling, ice core measurements and in-situ observations", EOS Transactions of the AGU, fall meeting supplement, abstract C51B-0527.

A. M. Walker, M. W. Ammann, S. Stackhouse, J. Wookey, J. P. Brodholt and D. P. Dobson (2013) "Anisotropy: A cause of heat flux variation at the CMB?", Goldschmidt 2013, abstract 2438 (invited).

A. Nowacki, A. M. Walker, J. Wookey, J. Walpole, G. Masters and J.-M. Kendall (2013) "Linking seismology, mineralogy and geodynamics with seismic anisotropy in the lowermost mantle", EGU General Assembly 2013, abstract EGU2013-11638.

A. Nowacki, A. M. Walker, J. Wookey and J.-M. Kendall (2012) "Finite-Frequency Simulations of Core-Reflected Seismic Waves to Assess Models of General Lower Mantle Anisotropy", EOS Transactions of the AGU, fall meeting supplement, abstract DI13A-2421.

A. M. Walker, M. A. Ammann, S. Stackhouse, J. Wookey, J. P. Brodholt and D. P. Dobson (2012) "Phase-Dependent Thermal Conductivity and Heat Flux Variation at the Core Mantle Boundary", EOS Transactions of the AGU, fall meeting supplement, abstract DI31B-2402.

J. F. Di Leo, Z. Li, A. M. Walker, J. Wookey, J.-M. Kendall, N. M. Ribe, and A. Tommasi (2012) "Seismic Anisotropy and SKS Splitting in the Sangihe Subduction Zone Predicted from 3-D Mantle Flow Models", EOS Transactions of the AGU, fall meeting supplement, abstract T32C-08.

A. J. Berry, P. F. Schodield, P. M. Doyle, K. S. Knight, J. F. M. Moddelmasn, A. M. Walkerm V. R. Seymour and S. E. Ashbrook (2012) "The oxidation state of titanium in hibonite", 75th Annual Meeting of the Meteoritical-Society, Meteoritics and Planetary Science vol 47, p.A67.

J. Wookey, A. M. Walker, D. R. Davies and J. H. Davies (2012) "Incorporating history dependence and texture in models of mantle convection", EOS Transactions of the AGU, fall meeting supplement, abstract T33G-2741.

J. Walpole, J. Wookey, G. Masters, A. Nowacki and A. M. Walker (2012) "Anisotropy at the edges of the mantle: shear wave splitting observations in the upper and lowermost mantle from around the globe", EOS Transactions of the AGU, fall meeting supplement, abstract MR43B-2321.

J. Wookey, A. M. Walker, A. Nowacki, J. Walpole and J.-M. Kendall (2012) "Using mineral elasticities to link geodynamics and seismic observations in the lowermost mantle.", EOS Transactions of the AGU, fall meeting supplement, abstract MR43B-2321 (invited).

S. A. Hunt and A. M. Walker (2012) "Texture development in CaIrO₃ post-perovskite." European Mineralogical Conference, 1, EMC2012-683.

S. A. Hunt, A. M. Walker and D. P. Dobson (2012) "Thermal diffusivity of oriented serpentinite at elevated pressures and temperatures by X-radiography" EGU General Assembly 2012. Geophysical Research Abstracts, 14, EGU2012-10316.

A. M. Walker, J. Wookey, A. Nowacki, J. Walpole, J.-M. Kendall and A. M. Forte (2011) "D″ anisotropy derived from models of mantle flow: Predictions of elasticity and comparisons with seismic observations", EOS Transactions of the AGU, fall meeting supplement, abstract DI32A-02 (invited).

A. M. Walker and J. Wookey (2011) "MSAT: a New Matlab Toolbox for the Analysis and Modelling of Seismic Anisotropy" EOS Transactions of the AGU, fall meeting supplement, abstract DI41A-2061.

A. Nowacki, A. M. Walker, J. Wookey, A. M. Forte and J.-M. Kendall (2011) "Flow-induced anisotropy in D″: comparing finite-frequency synthetic ScS waveforms with observations" EOS Transactions of the AGU, fall meeting supplement, abstract DI43A-2074.

J. Walpole, J. Wookey, A. Nowacki, A. M. Walker and G. Masters (2011) "Towards global observations of shear wave splitting in the Earth's lowermost mantle" EOS Transactions of the AGU, fall meeting supplement, abstract DI43A-2077.

A. M. Walker, A. Nowacki, A. M. Forte, J. Wookey and J.-M. Kendall (2011) "Can seismic anisotropy in D″ be used to constrain flow patterns in the lowermost mantle?" EGU General Assembly 2011. Geophysical Research Abstracts, 13, EGU2011-1480.

S. Hunt, D. P. Dobson, R. McCormack, A. M. Walker, L. Li and D. Weidner (2010) "Relative thermal diffusivities of perovskite and post-perovskite analogue(s)", EOS Transactions of the AGU 2010 fall meeting.

A. Nowacki, A. M. Walker, A. Forte, J. Wookey and J. M. Kendall (2010) "Predicting seismic anisotropy in D'' from global mantle flow models", EOS Transactions of the AGU 2010 fall meeting.

R. J. Angel, L. M. Sochalski-Kolbus, M. Tribuadino and A. M. Walker (2010) "Of tilts and tetrahedra in feldspars: From structure to thermodynamic properties", Geochimica et Cosmochimica Acta 74 A24, Goldschmidt conference 2010.

A. M. Walker, F. Zhang, K. Wright, J. D. Gale (2009), "Magnesium Vacancy Segregation and Fast Pipe Diffusion for the 1/2<110>{110} Edge Dislocation in MgO", EOS Transactions of the AGU 90(52), fall meeting supplement, abstract MR23B-06.

A. M. Walker (2009), "Dislocation cores in mantle minerals: atomic scale insights from computer simulation", Micro-Analysis, Processes, Time, Edinburgh, UK (invited).

A. Metsue, P. Carrez, P. Cordier, A. M. Walker, C. Denoual and D. Mainprice (2008), "Modelling dislocation cores in Mg₂SiO₄ wadsleyite at 15 GPa: Comparison with TEM observations", EOS Transactions of the AGU 89(52), fall meeting supplement.

M. Stimpfl, N. H. de Leeuw, M. J. Drake, P. A. Deymier, A. M. Walker (2006), "Effect of composition on adsorption of water on perfect olivine surfaces" Geochimica et Cosmochimica Acta 70(16) Suppl.1 pp.A615 doi:10.1016/j.gca.2006.06.1140

M. Stimpfl, N. H. de Leeuw, P. A. Deymier, M. J. Drake, A. M. Walker (2006), " In the beginning there was water and dust: a look into adsorption as a mechanism to explain water in the inner solar system" Lunar and Planetary Science XXXVII, Houston.

N. H. de Leeuw, M. Stimpfl, C. R. A. Catlow, M. J. Drake, P. A. Deymier, A. M. Walker (2006), "Can the water pressure in the accretion disk sustain water adsorption on olivine?" Meteoritics and Planetary Science 41(8), A45 Suppl. Section.

A. M. Walker, E. Artacho, K. F. Austen, M. Blanchard, R. P. Bruin, M. T. Dove, A. Marmier, S. C. Parker and T. O. H. White (2006) "Simulating sorption: Atomic scale processes binding pollutants and minerals", EMPG XI, Bristol, UK.

A. M. Walker, B. Slater and K. Wright (2006) "The formation and migration of magnesium point defects in forsterite". EMPG XI, Bristol, UK.

A. M. Walker (2006), "Towards mantle rheology from atomic scale simulation", EOS Transactions of the AGU 87(52), fall meeting supplement, abstract MR43D-07 (invited).

A. M. Walker, T. O. H. White, M. T. Dove, R. P. Bruin, P. A. Couch, R. P. Tyer (2006), "Semantic interoperability for computational mineralogy: experiences of the eMinerals consortium" EOS Transactions of the AGU 87(52), fall meeting supplement, abstract IN43D-07.

A. M. Walker, A. J. Berry, J. Hermann and H. St.C. O'Neill (2005), " First principles simulation of the energetics, structure and effect of the 'titanium-clinohumite' defect in forsterite", EOS Transactions of the AGU 86(52), fall meeting supplement, abstract MR44A-04.

M. Stimpfl, A. M. Walker, M. J. Drake, P. Deymier (2005), "An angstrom sized window on the origin of water in the inner Solar System: Atomistic simulation of the adsorption of water on olivine", EOS Transactions of the AGU 86(52), fall meeting supplement, abstract P51A-0903.

T. M. Harrison, A. Aikman, P. Holden, A. M. Walker, C. McFarlane, D. Rubatto and E. B. Watson (2005), "Testing the Ti-in-zircon thermometer", EOS Transactions of the AGU 86(52), fall meeting supplement, abstract V41F-1540.

A. M. Walker, J. D. Gale, B. Slater and K. Wright (2004), "Screw dislocations in zeolite A: a molecular helter skelter". Recent Research Reports of the 14th International Zeolite Conference, pp.74-75.

A. M. Walker, J. D. Gale, B. Slater and K. Wright (2003), "Modelling the cores of dislocations in minerals". EOS: Transactions of the AGU 84(46) fall meeting supplement, abstract V11D-0527 p.F1474.