Jan ter Heege (postdoctoral
researcher)
Experimental Petrology (NA 05/689)
Institute for Geology, Mineralogy and
Geophysics
Tel: 0234-3224141
Fax: 0234-3214433
Research interests: ·
Experimental determination of Fe-Mg diffusion in pyroxenes
(current) ·
Impedance spectroscopy
during phase transformations, dehydration reactions and partial melting at high pressure
(current) ·
Generation and grain scale
distribution of melts at high pressure (current) ·
Grain growth in natural and
synthetic quartz aggregates at high pressure (experiments finished, paper pending) ·
Relationship between dynamic
recrystallization, grain size distribution and rheology (finished, Ph.D.
project) Academic: January 2006-
Postdoctoral researcher, Experimental Petrology, Ruhr-University Bochum present
“Experimental determination of cation
diffusion in minerals” Collaborators: Sumit Chakraborty, Ralf Dohmen March 2002-
Postdoctoral researcher, Experimental Geophysics, Ruhr-University Bochum December 2005
“The grain-scale distribution of hydrous silicate melts
and the viscous compaction of partially molten aggregates” Collaborator: Joerg Renner March 2002
Ph.D. Experimental rock deformation,
“Relationship between dynamic
recrystallization, grain size distribution and rheology” Promotor: Chris Spiers, Co-promotor: Hans de
Bresser. August 1996
M.Sc. Geology (experimental rock deformation),
“Deformation processes in wet aggregates of flue
gas desulphurization gypsum Supervisor: Chris Spiers. Selected training: August 2005
Marie Curie Summer School "Single phase materials", Hürtgenwald, Germany
Günter Gottstein, Mark Jessell, Janos Urai and others
(web pages),
view poster (pdf, takes some time to download) December 2002
MSA short course "Plastic Deformation of Minerals and Rocks", Emeryville, USA
Shun-ichiro Karato and Hans-Rudi Wenk (eds)
(web pages) Publications: Peer reviewed
articles Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2005. Rheological behaviour of synthetic rocksalt: The interplay between
water, dynamic recrystallization and deformation mechanisms. Journal of
Structural Geology, 27, 948-963, Herwegh, M., Ter Heege, J.H. and De Bresser, J.H.P., 2005. Combining natural
microstructures with composite flow laws: An improved approach for the
extrapolation of lab data to nature. Journal of Structural Geology, 27, 503-521, Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2005. Dynamic recrystallization of wet synthetic polycrystalline halite:
Dependence of grain size distribution on flow stress, temperature and strain.
Tectonophysics, 396, 35-57, Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2004. Composite flow laws for crystalline materials with log-normally
distributed grain size: theory and application to olivine. Journal of
Structural Geology, 26, 1693-1705, Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2002. The influence of dynamic recrystallization on the
grain size distribution and rheological behaviour of
De Bresser, J.H.P., Ter Heege, J.H. and Spiers, C.J.,
2001. Grain size reduction by dynamic recrystallization: Can it result in major
rheological weakening ? International Journal of
Earth Sciences, 90, 28-45, Other
publications Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2004. Dynamic recrystallization of dense polycrystalline NaCl: Dependence
of grain size distribution on stress and temperature. In: B. Bacroix et al. (Editors), Recrystallization and grain
growth. Proceedings of the Second Joint International
Conference on Recrystallization and Grain Growth,
Ter Heege, J.H., 2002.
Relationship between dynamic recrystallization, grain size
distribution and rheology. Geologica Ultraiectina,
218. Ph.D. thesis
In preparation Ter Heege, J.H. and Renner, J.
In situ impedance spectroscopy on pyrophyllite and CaCO3
at high pressure and temperature: Phase transformations and kinetics of atomistic transport,
submitted to Physics and Chemistry of Minerals.
Ter Heege, J.H. and Renner, J.
Grain growth and grain boundary mobility in quartz rocks: Effect of composition, porosity and water
content, in prep.
Ter Heege, J.H. and Renner, J.
The effect of partial melting, hydrous fluids, grain size, and second phases
on electrical conductivity and atomistic transport properties: Insights from in situ
measurements on hydrous diopside-anorthite-albite mixtures at high pressure.
in prep.
Ter Heege, J.H., Dohmen, R., Becker, H.-W. and Chakraborty, S.
Experimental determination of Fe-Mg interdiffusion coefficients in
orthopyroxene using pulsed laser ablation and nanoscale thin films.
in prep.
Selected
abstracts Ter Heege, J.H., Dohmen, R., Becker, H.-W. and Chakraborty, S.,
2006. Experimental determination of Fe-Mg interdiffusion coefficients in
orthopyroxene using pulsed laser ablation and nanoscale thin films. EOS Transactions of the
American Geophysical Union, Fall Meeting, submitted,
abstract.
Ter Heege, J.H. and Renner, J., 2006.
Grain-scale distribution of hydrous melts and kinetics of atomistic transport processes in
diopside-anorthite-albite mixtures determined in situ using electrical impedance in high
pressure laboratory experiments. EOS Transactions of the
American Geophysical Union, 86 (52), Abstract MR23C-0074,
abstract
Ter Heege, J.H. and Renner, J., 2005.
Grain growth in quartz rocks: Constraints from high pressure annealing of novaculites and
synthetic quartz aggregates with different composition, porosity and water contents.
In: Mancktelow et al. (Organisors), 15th Conference on Deformation mechanisms, Rheology
and Tectonics, Zürich, Switzerland, pp. 212,
abstract.
Ter Heege, J.H. and Renner, J., 2005.
Impedance spectroscopy of geological materials at conditions pertinent to subduction zones.
In: Mancktelow et al. (Organisors), 15th Conference on Deformation mechanisms, Rheology
and Tectonics, Zürich, Switzerland, pp. 213,
abstract.
Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2004. The Role of Water in Ductile Deformation of
Polycrystalline Halite. A.K. Kronenberg and M.W. Jessell
(Organisers), Gordon Conference on the Role of Water in Rock Deformation,
Mount Ter Heege, J.H., De
Bresser, J.H.P. and Spiers, C.J., 2003. The effect of dynamic recrystallization on
rheology, microstructure and grain size distribution: Inferences from
experiments on polycrystalline halite. In: J.-P. Brun, P.R. Cobbold and D. Gapais (Editors),
Conference on Deformation mechanisms, Rheology and
Tectonics, Ter Heege, J.H. and Renner,
J., 2002. Grain growth in quartz: Effect of temperature,
pressure, composition and water. EOS Transactions of the American Geophysical
Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2001. The influence of strain and temperature on the
recrystallized grain size distribution of experimentally deformed Lorano Marble. In: S. De Meer et al. (Editors), Conference on Deformation Mechanisms, Rheology and
Tectonics, Noordwijkerhout, The Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 2000. The effect of grain size distribution on
rheology. EOS Transactions of the American
Geophysical Ter Heege, J.H., De
Bresser, J.H.P. and Spiers,
C.J., 1999. The role of microstructure in determining
rheology. 24th General Assembly of the European
Geophysical Society. Geophysical Research
Abstracts, 1. European
Geophysical Society, Ter Heege,
J.H., J.H.P. de Bresser and C.J. Spiers, 1997. The effect of grain size
distribution and dynamic recrystallization on rheology. In: G. Dresen, M. Handy and C. Janssen (Editors), Conference on Deformation Mechanisms,
Rheology and Microstructures, Neustadt an der Weinstraße,
Jan.terHeege*ruhr-uni-bochum.de (replace * by @)