Dr. Lukas Keller

Persönliches Profil

Leitungsfunktion

Leitung Microstructure Analysis and Property Prediction Group

Tätigkeit an der ZHAW

Principal Investigator

www.zhaw.ch/index.php

Aus- und Fortbildung

2005 Paul-Niggli medal from the Swiss Society of Mineralogy and Petrology. The award given for my contributions to the understanding of mineral reactions during the metamorphic cycle of the European Alpine collisional orogen.

Projekte

• CAPACITIVE – XCT Daten von Opalinus Clay Clay und mikrostrukturelle Untersuchungen / ProjektleiterIn / Projekt laufend
• EURAD-WP-Gas: Mechanistic understanding of gas transport in clay materials / ProjektleiterIn / Projekt abgeschlossen

Publikationen

• Liu, Lang; Giger, Silvio; Martin, Derek; Chalaturnyk, Rick; Schuster, Kristof; Deisman, Nathan; Keller, Lukas,

  2022.

  In-situ shear modulus determination by pressuremeter tests in opalinus clay and reconciliation with laboratory tests.

  Rock Mechanics and Rock Engineering.

  55(8), S. 4615-4635.

  Verfügbar unter: https://doi.org/10.1007/s00603-022-02873-0

• Keller, Lukas M.,

  2022.

  The hydromechanical behavior of opalinus clay fractures : combining roughness measurements with computer simulations.

  Frontiers in Earth Science.

  10(945377).

  Verfügbar unter: https://doi.org/10.3389/feart.2022.945377

• Keller, Lukas M.,

  2021.

  3D pore microstructures and computer simulation : effective permeabilities and capillary pressure during drainage in Opalinus Clay.

  Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles.

  76(44).

  Verfügbar unter: https://doi.org/10.2516/ogst/2021027

• Eidel, Bernhard; Gote, Ajinkya; Ruby, Marius; Holzer, Lorenz; Keller, Lukas; Jiang, Xin,

  2019.

  Estimating the effective elasticity properties of a diamond/β-SiC composite thin film by 3D reconstruction and numerical homogenization.

  Diamond and Related Materials.

  97.

  Verfügbar unter: https://doi.org/10.1016/j.diamond.2019.04.029

• Keller, Lukas M.; Giger, Silvio B.,

  2019.

  Petrophysical properties of opalinus clay drill cores determined from Med-XCT images.

  Geotechnical and Geological Engineering.

  37(4), S. 3507-3522.

  Verfügbar unter: https://doi.org/10.1007/s10706-019-00815-2

• Keller, Lukas; Holzer, Lorenz,

  2018.

  Image-based upscaling of permeability in opalinus clay.

  Journal of Geophysical Research: Solid Earth.

  123(1), S. 285-295.

  Verfügbar unter: https://doi.org/10.1002/2017JB014717

• Keller, Lukas M.; Schwiedrzik, Jakob J.; Gasser, Philippe; Michler, Johann,

  2017.

  Understanding anisotropic mechanical properties of shales at different length scales : in situ micropillar compression combined with finite element calculations.

  Journal of Geophysical Research: Solid Earth.

  122(8), S. 5945-5955.

  Verfügbar unter: https://doi.org/10.1002/2017JB014240

• Marschall, P.; Keller, Lukas; Giger, S. B.; Becker, J.,

  2016.

  Microstructural insights into the petrophysical characteristics of indurated clays.

  CMS Workshop Lectures.

  21, S. 191-198.

  Verfügbar unter: https://doi.org/10.1346/CMS-WLS-21.14

• Keller, Lukas M.,

  2016.

  Pore geometry effects on elastic properties of Opalinus Clay.

  Geophysics.

  81(5), S. D543-D551.

  Verfügbar unter: https://doi.org/10.1190/geo2015-0452.1

• Keller, Lukas M.,

  2016.

  Porosity anisotropy of Opalinus Clay : implications for the poroelastic behaviour.

  Geophysical Journal International.

  208(3), S. 1443-1448.

  Verfügbar unter: https://doi.org/10.1093/gji/ggw469

• Keller, Lukas M.; Hilger, André; Manke, Ingo,

  2015.

  Impact of sand content on solute diffusion in Opalinus Clay.

  Applied Clay Science.

  112-113, S. 134-142.

  Verfügbar unter: https://doi.org/10.1016/j.clay.2015.04.009

• Keller, Lukas M.; Holzer, Lorenz; Gasser, Philippe; Erni, Rolf; Rossell, Marta D.,

  2015.

  Intergranular pore space evolution in MX80 bentonite during a long-term experiment.

  Applied Clay Science.

  104, S. 150-159.

  Verfügbar unter: https://doi.org/10.1016/j.clay.2014.11.024

• Keller, Lukas M.; Jobmann, Michael; Schuetz, Philipp; Gasser, Philippe,

  2014.

  On the potential of tomographic methods when applied to compacted crushed rock salt.

  Transport in Porous Media.

  104(3), S. 607-620.

  Verfügbar unter: https://doi.org/10.1007/s11242-014-0355-y

• Keller, Lukas; Seiphoori, Ali; Gasser, Philippe; Lucas, Falk; Holzer, Lorenz; Ferrari, Alessio,

  2014.

  The pore structure of compacted and partly saturated MX-80 bentonite at different dry densities.

  Clays and Clay Minerals.

  62(3), S. 174-187.

  Verfügbar unter: https://doi.org/10.1346/CCMN.2014.0620302

• Keller, Lukas M.; Holzer, Lorenz; Schuetz, Philipp; Gasser, Philippe,

  2013.

  Pore space relevant for gas permeability in Opalinus clay : statistical analysis of homogeneity, percolation, and representative volume element.

  Journal of Geophysical Research: Solid Earth.

  118(6), S. 2799-2812.

  Verfügbar unter: https://doi.org/10.1002/jgrb.50228

• Keller, Lukas M.; Schuetz, Philippe; Erni, Rolf; Rossell, Marta D.; Lucas, Falk; Gasser, Philippe; Holzer, Lorenz,

  2013.

  Characterization of multi-scale microstructural features in Opalinus Clay.

  Microporous and Mesoporous Materials.

  170, S. 83-94.

  Verfügbar unter: https://doi.org/10.1016/j.micromeso.2012.11.029

• Holzer, Lorenz; Iwanschitz, Boris; Hocker, Thomas; Keller, Lukas; Pecho, Omar; Sartoris, Guido; Gasser, Philippe; Muench, Beat,

  2013.

  Redox cycling of Ni-YSZ anodes for solid oxide fuel cells: influence of tortuosity, constriction and percolation factors on the effective transport properties.

  Journal of Power Sources.

  242, S. 179-194.

  Verfügbar unter: https://doi.org/10.1016/j.jpowsour.2013.05.047

• Holzer, Lorenz; Wiedenmann, Daniel; Münch, Beat; Keller, Lukas; Prestat, Michel; Gasser, Philippe; Robertson, Iain; Grobéty, Bernard,

  2013.

  The influence of constrictivity on the effective transport properties of porous layers in electrolysis and fuel cells.

  Journal of Materials Science.

  48(7), S. 2934-2952.

  Verfügbar unter: https://doi.org/10.1007/s10853-012-6968-z

• Wiedenmann, Daniel; Keller, Lukas; Holzer, Lorenz; Stojadinović, Jelena; Münch, Beat; Suarez, Laura; Fumey, Benjamin; Hagendorfer, Harald; Brönnimann, Rolf; Modregger, Peter; Gorbar, Michal; Vogt, Ulrich F.; Züttel, Andreas; La Mantia, Fabio; Wepf, Roger; Grobéty, Bernard,

  2013.

  Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms.

  AIChE Journal.

  59(5), S. 1446-1457.

  Verfügbar unter: https://doi.org/10.1002/aic.14094

• Keller, Lukas; Holzer, Lorenz; Wepf, Roger; Gasser, Philippe,

  2011.

  3D geometry and topology of pore pathways in Opalinus clay : implications for mass transport.

  Applied Clay Science.

  52(1-2), S. 85-95.

  Verfügbar unter: https://doi.org/10.1016/j.clay.2011.02.003

• Keller, Lukas M.; Holzer, Lorenz; Wepf, Roger; Gasser, Philippe; Münch, Beat; Marschall, Paul,

  2011.

  On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay.

  Physics and Chemistry of the Earth, Parts A/B/C.

  36(17-18), S. 1539-1544.

  Verfügbar unter: https://doi.org/10.1016/j.pce.2011.07.010

• Giger, Silvio B.; Ewy, Russell T.; Favero, Valentina; Stankovic, Rudy; Keller, Lukas M.,

  2018.

  Consolidated-undrained triaxial testing of Opalinus Clay : results and method validation.

  Geomechanics for Energy and the Environment.

  14, S. 16-28.

  Verfügbar unter: https://doi.org/10.1016/j.gete.2018.01.003

• Keller, Lukas,

  2015.

  On the representative elementary volumes of clay rocks at the mesoscale.

  Journal of Geology and Mining Research.

  7(6), S. 58-64.

  Verfügbar unter: https://doi.org/10.5897/JGMR2015.0224

Publikationen vor Tätigkeit an der ZHAW

L. M. Keller & M. K. D. Stipp (2011). Crystal preferred orientations of sheared quartz aggregates: a new
comparison between nature and numerical simulations. Journal of structural geology, 33, 1491-1500.

L. M. Keller, L. Holzer, R. Wepf & P. Gasser (2011). 3D geometry and topology of pore pathways in Opalinus clay: Implications for mass transport. Applied Clay Sciences, 52, 85-95.

L. M. Keller, L. C. Götze, E. Rybacki & R. Abart (2010). Enhancement of solid-state reaction rates by non-
hydrostatic stress effects on polycrystalline diffusion kinetics. American Mineralogist, 95, 1399-1407.

L. C. Götze, R. Abart, E. Rybacki, L. M. Keller, E. Petrishcheva & G. Dresen (2010). Reaction rim growth in the
System MgO - Al2O3 - SiO2 under uniaxial stress. Mineralogy and Petrology, 99, 263-277.

J. Prenzle, R. Abart & L. M. Keller (2009). Complex chemical zoning in eclogite facies garnet reaction rims: the
role of grain boundary diffusion. Mineralogy and Petrology, 95, 303-313.

L. M. Keller, B. Wunder, D. Rhede & R. Wirth (2008). Component mobility at 900°C and 18 kbar from
experimentally grown coronas in a natural gabbro. Geochimica Cosmochmica Acta, 72, 4307-4322.

L. M. Keller, R. Wirth, D. Rhede, K. Kunze & R. Abart (2008). Asymetrically zoned reaction rims: assessment of
grain boundary diffusivities and growth rates related to natural diffusion controlled mineral reactions.
Journal of Metamorphic Geology, 26, 99-120.

L. M. Keller, C. A. Hauzenberger & R. Abart (2007). Interphase boundary diffusion rates and their effect on
retrograde zoning patterns of metamorphic minerals. Contributions to Mineralogy and Petrology, 154, 205-216.

L. M. Keller, R. Abart, R. Wirth, D. Schmid & K. Kunze (2006). Enhanced mass transfer through short circuit
diffusion: growth of garnet reaction rims at eclogite facies conditions. American Mineralogist, 91, 1024-1038.

L. M. Keller, B. Fügenschuh, M. Hess, B. Schneider & S. M. Schmid (2006). The Simplon fault zone in the
Western Alps: The mechanism of neogene faulting and folding revisited. Geology, 34, 317-320.

L. M. Keller, R. Abart & C. De Capitani (2005). Phase relations and chemical composition of phengite and
paragonite in pelitic schists during decompression: A case study from Monte Rosa nappe and Camughera – Moncuccounit, Western Alps. Journal of Petrology, 46, 2145-2166.

L. M. Keller, C. De Capitani & R. Abart (2005). A quaternary solution model for white micas based on natural
coexisting phengite-paragonite pairs. Journal of Petrology, 46, 2129-2144.

L. M. Keller, M. Hess, B. Fügenschuh & S. M. Schmid (2005). Structural and metamorphic evolution of the
Camughera-Mocucco and the Monte Rosa units southwest of the Simplon line. Eclogae geol. Helv.
(Swiss journal of Geosciences), 98, 19-49.

L. M. Keller, R. Abart, H. Stünitz & C. De Capitani (2004). Deformation, mass transfer and mineral reactions in an eclogite facies shear zone in a polymetamorphic metapelite (Monte Rosa nappe, western Alps).
Journal of Metamorphic Geology, 22, 97-118.

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