Dr Daniel Koehn

  • Reader (School of Geographical & Earth Sciences)

Research interests

Daniel Koehn

My research focus is structural geology and tectonics as well as pattern formation in geological systems. I work on a large range of length and time scales and use field observations, numerical simulations and experiments for my research. 

Current research 

  • Fracturing, fluid flow and fracture sealing (DGMK funded research group FRACS)
  • Flow and Transformation in Porous Media (FP7 Marie Curie Initial Training Network FlowTrans)
  • Stylolite Stress Inversion
  • Extreme horst uplift in East Africa (DFG funded RiftLink Project)
  • Tectonics of the continental margins of Namibia and Brazil (DFG funded project within the SAMPLE group)
  • Deep seated Geothermal systems and their relation to faults (cooperation with the School of Engineering)

Fracturing, fluid flow and fracture sealing (DGMK funded research group FRACS)

Prediction of the behaviour of fractured and tight reservoirs is hindered by a lack of understanding of dissolution (forming stylolites) and the formation and sealing of fractures(producing veins). These processes can significantly change geometrical characteristics, mechanical properties, and fluid transport in reservoirs. In the FRACS project (DGMK Project 718) we are working on an understanding of the coupling between sealing of fractures/faults, fluid-flow evolution, and creation of fluidpathways through fracturing. The main objective is to achieve an improved understanding of the dynamic fluid-flow characteristics of a variety of heterogeneous, fractured and resealed reservoirs. Such an understanding can form the basis for the development of predictive tools. FRACS Homepage

Flow and Transformation in Porous Media

The characterization and the understanding of flow of fluids within rocks and granular media has become an ever-increasing problem in Earth Sciences, Physics, and in many industrial applications, including CO2 sequestration, hydrocarbon migration, ore deposit development, and radioactive waste disposal. One of the main problems is the understanding of flows in transforming porous media (PM), where the rocks and fluid pathways evolve spatially and temporally, for example due to chemical interactions with the flow, or due to compaction of the solid matrix. The dynamic feedbacks between flow, destruction of permeability due to compaction or local precipitation, and creation of permeability due to dissolution, chemical reaction or fracturing, makes understanding of such complex systems a challenge. Such feedbacks between flow of fluids and PM in which they are flowing, are important in both relatively slowly deforming PM such as in naturally evolving reservoirs, and in rapidly evolving PM such as fluid-filled fault zones or soils experiencing earthquakes, rapidly flowing grain-fluid mixtures in debris flows, or industrial processes in petroleum production such as pyrolysis or hydrofracking. We propose to study the feedback mechanisms and their impact on the porous media through an interdisciplinary approach between Earth Scientists and Physicists. State of the art analytical and experimental methods will be used on natural systems and rock analogues, and will be complemented by multi-scale dynamical simulations, to develop new basic understanding and new methods that can be directly used in industrial applications. FlowTrans Homepage

Stylolite Stress Inversion

Stylolites are rough surfaces in rocks that develop due to localized stress-induced dissolution. They are very common features especially in limestones and are thus easy to sample. In the last years we have developed a new promising method to use stylolites as stress gauges. The stylolite teeth give the direction of the main compressive stress and the rough interface contains a signature of the absolute value of the stress during stylolite growth. Given a number of assumptions (elastic constants, density of rocks, anisotropy of stress state) a set of stylolites can reveal the full three-dimensional paleostresstensor and the paleodepth of stylolite formation.  Stylolites thus represent a new and almost untouched archive of paleostress states within the upper crust of the Earth. 

Extreme horst uplift in East Africa

The Rwenzoris  in western Uganda are a 5000m high basement block that lies within the western branch of the East African Rift System. As part of a DFG funded Forschergruppe we explored the past and present tectonic history of the mountain. Fault patterns within the mountain are relatively complex and stress inversion indicates extension, strike slip as well as compressional regimes. We have modelled the evolution of the area with several numerical models. Results indicate that the mountain is captured by propagating rift segments and that it is currently rotating clockwise. Numerical models of surface uplift indicate that the Rwenzori comes up in a similar way to a rift flank, however, in order to achieve its extreme height it has to be relatively stiff. We propose that this stiffness is achieved by a palaeoproterozoic fold and thrust belt that strikes across the mountain with the core being an amphibolite wedge that contains the peaks Margerita and Baker. RiftLink Homepage

Tectonics of the continental margins of Namibia and Brazil

As part of the DFG funded SPP SAMPLE we look at the tectonic evolution of the passive continental shelf of Namibia and Brazil. Our work includes a study of the reactivation of basement features during margin related tectonic events as well as a stress inversion study of both margins in order to compare their structural setting and history. SAMPLE Homepage


Selected publications

Lindenfeld, M., Rümpker, G., Link, K., Koehn, D. and Batte, A. (2012) Fluid-triggered earthquake swarms in the Rwenzori region, East African Rift – evidence for rift initiati. Tectonophysics, 566, pp. 95-104. (doi:10.1016/j.tecto.2012.07.010)

Koehn, D. , Ebner, M., Renard, F., Toussaint, R. and Passchier, W. (2012) Modelling of stylolite geometries and stress scaling. Earth and Planetary Science Letters, 341, pp. 104-113. (doi:10.1016/j.epsl.2012.04.046)

Ebner, M., Koehn, D. , Toussaint, R., Renard, F. and Schmittbuhl, J. (2009) Stress sensitivity of stylolite morphology. Earth and Planetary Science Letters, 277(3-4), pp. 394-398. (doi:10.1016/j.epsl.2008.11.001)

Koehn, D. , Aanyu, K., Haines, S. and Sachau, T. (2008) Rift nucleation, rift propagation and the creation of basement micro-plates within active rifts. Tectonophysics, 458(1-4), pp. 105-116. (doi:10.1016/j.tecto.2007.10.003)


Grants

Recent Grants

  • FP7 Marie Curie Initial Training Network FlowTrans, Flow and Transformation in Porous Media, Coordination by the University of Glasgow. Total budget Euro 4.1m, Glasgow budget Euro 1m. 11 PhDs and 4 Postdocs. FlowTrans Homepage
  • FRACS Mineral Vein Dynamics Modelling II, started Juli 2012, DGMK funded basic research group. Total budget Euro 0.96m, Glasgow budget Euro 210 k. 4 PhDs and 3 Postdocs. FRACS Homepage

Supervision

PhD students 

Irfan Ghani, University of Mainz, FRACS Project (DGMK funded): Dynamic development of hydrofracture, defended sucessfully september 2013

Eric Salomon, University of Mainz, SAMPLE Project (DFG funded): Tectonic evolution of the South Atlantic passive continental margin based on onshore structural data Homepage

Anna Vass, FRACS Project (DGMK funded): Large-scale dynamic fracturing and healing of multilayered, high fluid pressure systems. Homepage

Daisy Pataki Rood, FRACS Project (DGMK funded): The role of stylolites in sedimentary basins. Homepage

Ulrich Kelka, FlowTrans (Marie Curie ITN), My research aims to understand the genesis of the so called zebra textures in Dolostones. Homepage

Janis Aleksans, NERC Oil and Gas CDT. Dynamics of hydrofracturing and associated signals (from porous to tight rocks). Homepage

Allan Hollinsworth, NERC Oil and Gas CDT. Understanding porosity-permeability evolution of basement faults using 4D computed X-ray tomography. Homepage

co-supervision of PhD students: 

Helen Robinson, School of Engineering, Glasgow University, Geothermal systems in the East African Rift, cooperation with Prof. Paul Younger

Karine Petrus, Univeristy of Warshaw, Poland, FlowTrans (Marie Curie ITN), Modelling the joint effects of flow, dissolution and deformation on the evolution of porous media, Homepage

Stephen Centrella, University of Muenster, Germany, FlowTrans (Marie Curie ITN), The relation between chemistry and texture across shear zones, Homepage

PostDoc 

Dr. Nicolas Beaudoin, FlowTrans (Marie Curie ITN), Understanding the nature, origin and migration pathway of fluids that migrated and precipitated as precious ore mineralization in stylolites as observed in granitic rocks and compressive context. Homepage

FlowTrans Administrator

Dr. Wendy Louise Smith, Homepage


Teaching

Currently I teach structural geology on Level 1, Level 2 and Level 3 courses including Level 2 and Level 3 practical exercises. 

I am also involved in a 1day field trip to Corrieburn, a 1day field trip to Stonehaven and two residential field trips to Ardnamurchan and Oban that last a full week each. 

In addition I supervise several Level 4 projects each year. 

Currently I am the Exam Officer of the Earth Sciences group. 


Additional information

Numerical Modeling 

Below are some links to software that we develop to simulate geological patterns

Elle numerical model (homepage)

Melange numerical model (homepage)


All publications

List by: Type | Date

Jump to: 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2004 | 2003 | 2001 | 2000
Number of items: 48.

2018

Beaudoin, N. , Hamilton, A., Koehn, D. , Kai Shipton, Z. and Kelka, U. (2018) Reaction-induced porosity fingering: replacement dynamic and porosity evolution in the KBr-KCl system. Geochimica et Cosmochimica Acta, (doi:10.1016/j.gca.2018.04.026) (In Press)

2017

Salomon, E., Passchier, C. and Koehn, D. (2017) Asymmetric continental deformation during South Atlantic rifting along southern Brazil and Namibia. Gondwana Research, 52, pp. 170-176. (doi:10.1016/j.gr.2017.08.001)

Kelka, U., Veviakis, M., Koehn, D. and Beaudoin, N. (2017) Zebra rocks: compaction waves create ore deposits. Scientific Reports, 7(1), 14260. (doi:10.1038/s41598-017-14541-3) (PMID:29079847) (PMCID:PMC5660191)

2016

Koehn, D. , Rood, M.P., Beaudoin, N. , Chung, P., Bons, P.D. and Gomez-Rivas, E. (2016) A new stylolite classification scheme to estimate compaction and local permeability variations. Sedimentary Geology, 346, pp. 60-71. (doi:10.1016/j.sedgeo.2016.10.007)

Koehn, D. , Link, K., Sachau, T., Passchier, C.W., Aanyu, K., Spikings, A. and Harbinson, R. (2016) The Rwenzori Mountains, a Paleoproterzoic crustal shear belt crossing the Albertine rift system. International Journal of Earth Sciences, 105(6), pp. 1693-1705. (doi:10.1007/s00531-015-1167-1)

Sachau, T., Koehn, D. , Stamps, D. S. and Lindenfeld, M. (2016) Fault kinematics and stress fields in the Rwenzori Mountains, Uganda. International Journal of Earth Sciences, 105(6), pp. 1729-1740. (doi:10.1007/s00531-015-1162-6)

Beaudoin, N. , Koehn, D. , Lacombe, O., Lecouty, A., Billi, A., Aharonov, E. and Parlangeau, C. (2016) Fingerprinting stress: stylolite and calcite twinning paleopiezometry revealing the complexity of progressive stress patterns during folding-the case of the Monte Nero anticline in the Apennines, Italy. Tectonics, 35(7), pp. 1687-1712. (doi:10.1002/2016TC004128)

Salomon, E., Koehn, D. , Passchier, C., Chung, P., Haeger, T., Salvona, A. and Davis, J. (2016) Deformation and fluid flow in the Huab Basin and Etendeka Plateau, NW Namibia. Journal of Structural Geology, 88, pp. 46-62. (doi:10.1016/j.jsg.2016.05.001)

2015

Salomon, E., Koehn, D. , Passcier, C., Hackspacher, C. P. and Glasmacher, U. A. (2015) Contrasting stress fields on correlating margins of the South Atlantic. Gondwana Research, 28(3), pp. 1152-1167. (doi:10.1016/j.gr.2014.09.006)

Salomon, E., Koehn, D. and Passchier, C. (2015) Brittle reactivation of ductile shear zones in NW Namibia in relation to South Atlantic rifting. Tectonics, 34(1), pp. 70-85. (doi:10.1002/2014TC003728)

Ghani, I., Koehn, D. , Toussaint, R. and Passchier, C. (2015) Dynamics of hydrofracturing and permeability evolution in layered reservoirs. Frontiers in Physics, 3, 67. (doi:10.3389/fphy.2015.00067) (PMID:25798109) (PMCID:PMC4351591)

Kelka, U., Koehn, D. and Beaudoin, N. (2015) Zebra pattern in rocks as a function of grain growth affected by second-phase particles. Frontiers in Physics, 3, 74. (doi:10.3389/fphy.2015.00074) (PMID:25821435) (PMCID:PMC4358071)

2014

Vass, A., Koehn, D. , Toussaint, R., Ghani, I. and Piazolo, S. (2014) The importance of fracture-healing on the deformation of fluid-filled layered systems. Journal of Structural Geology, 67, pp. 94-106. (doi:10.1016/j.jsg.2014.07.007)

Gomez-Rivas, E., Bons, P.D., Koehn, D. , Urai, J.L., Arndt, M., Virgo, S., Laurich, B., Zeeb, C., Stark, L. and Blum, P. (2014) The Jabal Akhdar Dome in the Oman Mountains: evolution of a dynamic fracture system. American Journal of Science, 314(7), pp. 1104-1139. (doi:10.2475/07.2014.02)

Koehn, D. and Sachau, T. (2014) Two-dimensional numerical modeling of fracturing and shear band development in glacier fronts. Journal of Structural Geology, 61, pp. 133-142. (doi:10.1016/j.jsg.2012.11.002)

Koehn, D. and Bons, P. D. (2014) Micro-dynamics of ice. Journal of Structural Geology, 61, p. 1. (doi:10.1016/j.jsg.2013.12.001)

Sachau, T. and Koehn, D. (2014) A new mixed-mode fracture criterion for large-scale lattice models. Geoscientific Model Development, 7(1), pp. 243-247. (doi:10.5194/gmd-7-243-2014)

2013

Ghani, I., Koehn, D. , Toussaint, R. and Passchier, C. W. (2013) Dynamic development of hydrofracture. Pure and Applied Geophysics, 170(11), pp. 1685-1703. (doi:10.1007/s00024-012-0637-7)

Sachau, T., Koehn, D. and Passchier, C. (2013) Mountain-building under extension. American Journal of Science, 313(4), pp. 326-344. (doi:10.2475/04.2013.03)

2012

Sachau, T. and Koehn, D. (2012) Melange: a viscoelastic lattice-particle model applicable to the lithosphere. Geochemistry, Geophysics, Geosystems, 13(12), pp. 1-26. (doi:10.1029/2012GC004452)

Lindenfeld, M., Rümpker, G., Link, K., Koehn, D. and Batte, A. (2012) Fluid-triggered earthquake swarms in the Rwenzori region, East African Rift – evidence for rift initiati. Tectonophysics, 566, pp. 95-104. (doi:10.1016/j.tecto.2012.07.010)

Koehn, D. , Ebner, M., Renard, F., Toussaint, R. and Passchier, W. (2012) Modelling of stylolite geometries and stress scaling. Earth and Planetary Science Letters, 341, pp. 104-113. (doi:10.1016/j.epsl.2012.04.046)

Rolland, A., Toussaint, R., Baud, P., Schmittbuhl, J., Conil, N., Koehn, D. , Renard, F. and Gratier, J.-P. (2012) Modeling the growth of stylolites in sedimentary rocks. Journal of Geophysical Research, 117(B6), B06403. (doi:10.1029/2011JB009065)

Arslan, A., Koehn, D. , Passchier, C.W. and Sachau, T. (2012) The transition from single layer to foliation boudinage: A dynamic modelling approach. Journal of Structural Geology, 42, pp. 118-126. (doi:10.1016/j.jsg.2012.06.005)

2011

Aanyu, K. and Koehn, D. (2011) Influence of pre-existing fabrics on fault kinematics and rift geometry of interacting segments: Analogue models based on the Albertine Rift (Uganda), Western Branch-East African Rift System. Journal of African Earth Sciences, 59(2-3), pp. 168-184. (doi:10.1016/j.jafrearsci.2010.10.003)

Neuville, A., Toussaint, R., Schmittbuhl, J., Koehn, D. and Schwarz, J.-O. (2011) Characterization of major discontinuities from borehole cores of the black consolidated marl formation of Draix (French Alps). Hydrological Processes, 26(14), pp. 2085-2094. (doi:10.1002/hyp.7984)

Sachau, T., Koehn, D. and Passchier, C. (2011) Lattice-particle simulation of stress patterns in a Rwenzori-type rift transfer zone. Journal of African Earth Sciences, 61(4), pp. 286-295. (doi:10.1016/j.jafrearsci.2011.08.006)

2010

Ebner, M., Piazolo, S., Renard, F. and Koehn, D. (2010) Stylolite interfaces and surrounding matrix material: Nature and role of heterogeneities in roughness and microstructural development. Journal of Structural Geology, 32(8), pp. 1070-1084. (doi:10.1016/j.jsg.2010.06.014)

Ebner, M., Toussaint, R., Schmittbuhl, J., Koehn, D. and Bons, P. (2010) Anisotropic scaling of tectonic stylolites: A fossilized signature of the stress field? Journal of Geophysical Research, 115(B6), B06403. (doi:10.1029/2009JB006649)

Koehn, D. , Lindenfeld, M., Rümpker, G., Aanyu, K., Haines, S., Passchier, C. W. and Sachau, T. (2010) Active transsection faults in rift transfer zones: evidence for complex stress fields and implications for crustal fragmentation processes in the western branch of the East African Rift. International Journal of Earth Sciences, 99(7), pp. 1633-1642. (doi:10.1007/s00531-010-0525-2)

Link, K., Koehn, D. , Barth, M.G., Tiberindwa, J.V., Barifaijo, E., Aanyu, K. and Foley, S.F. (2010) Continuous cratonic crust between the Congo and Tanzania blocks in western Uganda. International Journal of Earth Sciences, 99(7), pp. 1559-1573. (doi:10.1007/s00531-010-0548-8)

Sachau, T. and Koehn, D. (2010) Faulting of the lithosphere during extension and related rift-flank uplift: a numerical study. International Journal of Earth Sciences, 99(7), pp. 1619-1632. (doi:10.1007/s00531-010-0513-6)

2009

Maeder, X., Passchier, C. W. and Koehn, D. (2009) Modelling of segment structures: Boudins, bone-boudins, mullions and related single- and multiphase deformation features. Journal of Structural Geology, 31(8), pp. 817-830. (doi:10.1016/j.jsg.2009.05.013)

Ebner, M., Koehn, D. , Toussaint, R., Renard, F. and Schmittbuhl, J. (2009) Stress sensitivity of stylolite morphology. Earth and Planetary Science Letters, 277(3-4), pp. 394-398. (doi:10.1016/j.epsl.2008.11.001)

Ebner, M., Koehn, D. , Toussaint, R. and Renard, F. (2009) The influence of rock heterogeneity on the scaling properties of simulated and natural stylolites. Journal of Structural Geology, 31(1), pp. 72-82. (doi:10.1016/j.jsg.2008.10.004)

2008

Koehn, D. , Aanyu, K., Haines, S. and Sachau, T. (2008) Rift nucleation, rift propagation and the creation of basement micro-plates within active rifts. Tectonophysics, 458(1-4), pp. 105-116. (doi:10.1016/j.tecto.2007.10.003)

Arslan, A., Passchier, C. and Koehn, D. (2008) Foliation boudinage. Journal of Structural Geology, 30(3), pp. 291-309. (doi:10.1016/j.jsg.2007.11.004)

2007

Koehn, D. , Renard, F., Toussaint, R. and Passchier, C. (2007) Growth of stylolite teeth patterns depending on normal stress and finite compaction. Earth and Planetary Science Letters, 257(3-4), pp. 582-595. (doi:10.1016/j.epsl.2007.03.015)

Iacopini, D., Passchier, C., Koehn, D. and Carosi, R. (2007) Fabric attractors in general triclinic flow systems and their application to high strain shear zones: A dynamical system approach. Journal of Structural Geology, 29(2), pp. 298-317. (doi:10.1016/j.jsg.2006.10.002)

2006

Koehn, D. , Malthe-Sørenssen, A. and Passchier, C. (2006) The structure of reactive grain-boundaries under stress containing confined fluids. Chemical Geology, 230(3-4), pp. 207-219. (doi:10.1016/j.chemgeo.2006.02.026)

2004

Koehn, D. , Dysthe, D. K. and Jamtveit, B. (2004) Transient dissolution patterns on stressed crystal surfaces. Geochimica et Cosmochimica Acta, 68(16), pp. 3317-3325. (doi:10.1016/j.gca.2004.02.004)

2003

Koehn, D. , Arnold, J., Jamtveit, B. and Malthe-Sørenssen, A. (2003) Instabilities in stress corrosion and the transition to brittle failure. American Journal of Science, 303(10), pp. 956-971. (doi:10.2475/ajs.303.10.956)

Koehn, D. , Bons, P.D. and Passchier, C.W. (2003) Development of antitaxial strain fringes during non-coaxial deformation: an experimental study. Journal of Structural Geology, 25(2), pp. 263-275. (doi:10.1016/S0191-8141(02)00022-6)

Walte, N. P., Bons, P. D., Passchier, C. W. and Koehn, D. (2003) Disequilibrium melt distribution during static recrystallization. Geology, 31(11), pp. 1009-1012. (doi:10.1130/G19815.1)

2001

Hilgers, C., Koehn, D. , Bons, P.D. and Urai, J.L. (2001) Development of crystal morphology during unitaxial growth in a progressively widening vein: II. Numerical simulations of the evolution of antitaxial fibrous veins. Journal of Structural Geology, 23(6-7), pp. 873-885. (doi:10.1016/S0191-8141(00)00160-7)

Koehn, D. , Aerden, D.G.A.M., Bons, P.D. and Passchier, C.W. (2001) Computer experiments to investigate complex fibre patterns in natural antitaxial strain fringes. Journal of Metamorphic Geology, 19(2), pp. 217-231. (doi:10.1046/j.0263-4929.2000.00305.x)

2000

Koehn, D. , Hilgers, C., Bons, P. D. and Passchier, C. W. (2000) Numerical simulation of fibre growth in antitaxial strain fringes. Journal of Structural Geology, 22(9), pp. 1311-1324. (doi:10.1016/S0191-8141(00)00039-0)

Koehn, D. (2000) Shear sense indicators in striped bedding-veins. Journal of Structural Geology, 22(8), pp. 1141-1151. (doi:10.1016/S0191-8141(00)00028-6)

This list was generated on Tue Oct 16 13:33:53 2018 BST.
Jump to: Articles
Number of items: 48.

Articles

Beaudoin, N. , Hamilton, A., Koehn, D. , Kai Shipton, Z. and Kelka, U. (2018) Reaction-induced porosity fingering: replacement dynamic and porosity evolution in the KBr-KCl system. Geochimica et Cosmochimica Acta, (doi:10.1016/j.gca.2018.04.026) (In Press)

Salomon, E., Passchier, C. and Koehn, D. (2017) Asymmetric continental deformation during South Atlantic rifting along southern Brazil and Namibia. Gondwana Research, 52, pp. 170-176. (doi:10.1016/j.gr.2017.08.001)

Kelka, U., Veviakis, M., Koehn, D. and Beaudoin, N. (2017) Zebra rocks: compaction waves create ore deposits. Scientific Reports, 7(1), 14260. (doi:10.1038/s41598-017-14541-3) (PMID:29079847) (PMCID:PMC5660191)

Koehn, D. , Rood, M.P., Beaudoin, N. , Chung, P., Bons, P.D. and Gomez-Rivas, E. (2016) A new stylolite classification scheme to estimate compaction and local permeability variations. Sedimentary Geology, 346, pp. 60-71. (doi:10.1016/j.sedgeo.2016.10.007)

Koehn, D. , Link, K., Sachau, T., Passchier, C.W., Aanyu, K., Spikings, A. and Harbinson, R. (2016) The Rwenzori Mountains, a Paleoproterzoic crustal shear belt crossing the Albertine rift system. International Journal of Earth Sciences, 105(6), pp. 1693-1705. (doi:10.1007/s00531-015-1167-1)

Sachau, T., Koehn, D. , Stamps, D. S. and Lindenfeld, M. (2016) Fault kinematics and stress fields in the Rwenzori Mountains, Uganda. International Journal of Earth Sciences, 105(6), pp. 1729-1740. (doi:10.1007/s00531-015-1162-6)

Beaudoin, N. , Koehn, D. , Lacombe, O., Lecouty, A., Billi, A., Aharonov, E. and Parlangeau, C. (2016) Fingerprinting stress: stylolite and calcite twinning paleopiezometry revealing the complexity of progressive stress patterns during folding-the case of the Monte Nero anticline in the Apennines, Italy. Tectonics, 35(7), pp. 1687-1712. (doi:10.1002/2016TC004128)

Salomon, E., Koehn, D. , Passchier, C., Chung, P., Haeger, T., Salvona, A. and Davis, J. (2016) Deformation and fluid flow in the Huab Basin and Etendeka Plateau, NW Namibia. Journal of Structural Geology, 88, pp. 46-62. (doi:10.1016/j.jsg.2016.05.001)

Salomon, E., Koehn, D. , Passcier, C., Hackspacher, C. P. and Glasmacher, U. A. (2015) Contrasting stress fields on correlating margins of the South Atlantic. Gondwana Research, 28(3), pp. 1152-1167. (doi:10.1016/j.gr.2014.09.006)

Salomon, E., Koehn, D. and Passchier, C. (2015) Brittle reactivation of ductile shear zones in NW Namibia in relation to South Atlantic rifting. Tectonics, 34(1), pp. 70-85. (doi:10.1002/2014TC003728)

Ghani, I., Koehn, D. , Toussaint, R. and Passchier, C. (2015) Dynamics of hydrofracturing and permeability evolution in layered reservoirs. Frontiers in Physics, 3, 67. (doi:10.3389/fphy.2015.00067) (PMID:25798109) (PMCID:PMC4351591)

Kelka, U., Koehn, D. and Beaudoin, N. (2015) Zebra pattern in rocks as a function of grain growth affected by second-phase particles. Frontiers in Physics, 3, 74. (doi:10.3389/fphy.2015.00074) (PMID:25821435) (PMCID:PMC4358071)

Vass, A., Koehn, D. , Toussaint, R., Ghani, I. and Piazolo, S. (2014) The importance of fracture-healing on the deformation of fluid-filled layered systems. Journal of Structural Geology, 67, pp. 94-106. (doi:10.1016/j.jsg.2014.07.007)

Gomez-Rivas, E., Bons, P.D., Koehn, D. , Urai, J.L., Arndt, M., Virgo, S., Laurich, B., Zeeb, C., Stark, L. and Blum, P. (2014) The Jabal Akhdar Dome in the Oman Mountains: evolution of a dynamic fracture system. American Journal of Science, 314(7), pp. 1104-1139. (doi:10.2475/07.2014.02)

Koehn, D. and Sachau, T. (2014) Two-dimensional numerical modeling of fracturing and shear band development in glacier fronts. Journal of Structural Geology, 61, pp. 133-142. (doi:10.1016/j.jsg.2012.11.002)

Koehn, D. and Bons, P. D. (2014) Micro-dynamics of ice. Journal of Structural Geology, 61, p. 1. (doi:10.1016/j.jsg.2013.12.001)

Sachau, T. and Koehn, D. (2014) A new mixed-mode fracture criterion for large-scale lattice models. Geoscientific Model Development, 7(1), pp. 243-247. (doi:10.5194/gmd-7-243-2014)

Ghani, I., Koehn, D. , Toussaint, R. and Passchier, C. W. (2013) Dynamic development of hydrofracture. Pure and Applied Geophysics, 170(11), pp. 1685-1703. (doi:10.1007/s00024-012-0637-7)

Sachau, T., Koehn, D. and Passchier, C. (2013) Mountain-building under extension. American Journal of Science, 313(4), pp. 326-344. (doi:10.2475/04.2013.03)

Sachau, T. and Koehn, D. (2012) Melange: a viscoelastic lattice-particle model applicable to the lithosphere. Geochemistry, Geophysics, Geosystems, 13(12), pp. 1-26. (doi:10.1029/2012GC004452)

Lindenfeld, M., Rümpker, G., Link, K., Koehn, D. and Batte, A. (2012) Fluid-triggered earthquake swarms in the Rwenzori region, East African Rift – evidence for rift initiati. Tectonophysics, 566, pp. 95-104. (doi:10.1016/j.tecto.2012.07.010)

Koehn, D. , Ebner, M., Renard, F., Toussaint, R. and Passchier, W. (2012) Modelling of stylolite geometries and stress scaling. Earth and Planetary Science Letters, 341, pp. 104-113. (doi:10.1016/j.epsl.2012.04.046)

Rolland, A., Toussaint, R., Baud, P., Schmittbuhl, J., Conil, N., Koehn, D. , Renard, F. and Gratier, J.-P. (2012) Modeling the growth of stylolites in sedimentary rocks. Journal of Geophysical Research, 117(B6), B06403. (doi:10.1029/2011JB009065)

Arslan, A., Koehn, D. , Passchier, C.W. and Sachau, T. (2012) The transition from single layer to foliation boudinage: A dynamic modelling approach. Journal of Structural Geology, 42, pp. 118-126. (doi:10.1016/j.jsg.2012.06.005)

Aanyu, K. and Koehn, D. (2011) Influence of pre-existing fabrics on fault kinematics and rift geometry of interacting segments: Analogue models based on the Albertine Rift (Uganda), Western Branch-East African Rift System. Journal of African Earth Sciences, 59(2-3), pp. 168-184. (doi:10.1016/j.jafrearsci.2010.10.003)

Neuville, A., Toussaint, R., Schmittbuhl, J., Koehn, D. and Schwarz, J.-O. (2011) Characterization of major discontinuities from borehole cores of the black consolidated marl formation of Draix (French Alps). Hydrological Processes, 26(14), pp. 2085-2094. (doi:10.1002/hyp.7984)

Sachau, T., Koehn, D. and Passchier, C. (2011) Lattice-particle simulation of stress patterns in a Rwenzori-type rift transfer zone. Journal of African Earth Sciences, 61(4), pp. 286-295. (doi:10.1016/j.jafrearsci.2011.08.006)

Ebner, M., Piazolo, S., Renard, F. and Koehn, D. (2010) Stylolite interfaces and surrounding matrix material: Nature and role of heterogeneities in roughness and microstructural development. Journal of Structural Geology, 32(8), pp. 1070-1084. (doi:10.1016/j.jsg.2010.06.014)

Ebner, M., Toussaint, R., Schmittbuhl, J., Koehn, D. and Bons, P. (2010) Anisotropic scaling of tectonic stylolites: A fossilized signature of the stress field? Journal of Geophysical Research, 115(B6), B06403. (doi:10.1029/2009JB006649)

Koehn, D. , Lindenfeld, M., Rümpker, G., Aanyu, K., Haines, S., Passchier, C. W. and Sachau, T. (2010) Active transsection faults in rift transfer zones: evidence for complex stress fields and implications for crustal fragmentation processes in the western branch of the East African Rift. International Journal of Earth Sciences, 99(7), pp. 1633-1642. (doi:10.1007/s00531-010-0525-2)

Link, K., Koehn, D. , Barth, M.G., Tiberindwa, J.V., Barifaijo, E., Aanyu, K. and Foley, S.F. (2010) Continuous cratonic crust between the Congo and Tanzania blocks in western Uganda. International Journal of Earth Sciences, 99(7), pp. 1559-1573. (doi:10.1007/s00531-010-0548-8)

Sachau, T. and Koehn, D. (2010) Faulting of the lithosphere during extension and related rift-flank uplift: a numerical study. International Journal of Earth Sciences, 99(7), pp. 1619-1632. (doi:10.1007/s00531-010-0513-6)

Maeder, X., Passchier, C. W. and Koehn, D. (2009) Modelling of segment structures: Boudins, bone-boudins, mullions and related single- and multiphase deformation features. Journal of Structural Geology, 31(8), pp. 817-830. (doi:10.1016/j.jsg.2009.05.013)

Ebner, M., Koehn, D. , Toussaint, R., Renard, F. and Schmittbuhl, J. (2009) Stress sensitivity of stylolite morphology. Earth and Planetary Science Letters, 277(3-4), pp. 394-398. (doi:10.1016/j.epsl.2008.11.001)

Ebner, M., Koehn, D. , Toussaint, R. and Renard, F. (2009) The influence of rock heterogeneity on the scaling properties of simulated and natural stylolites. Journal of Structural Geology, 31(1), pp. 72-82. (doi:10.1016/j.jsg.2008.10.004)

Koehn, D. , Aanyu, K., Haines, S. and Sachau, T. (2008) Rift nucleation, rift propagation and the creation of basement micro-plates within active rifts. Tectonophysics, 458(1-4), pp. 105-116. (doi:10.1016/j.tecto.2007.10.003)

Arslan, A., Passchier, C. and Koehn, D. (2008) Foliation boudinage. Journal of Structural Geology, 30(3), pp. 291-309. (doi:10.1016/j.jsg.2007.11.004)

Koehn, D. , Renard, F., Toussaint, R. and Passchier, C. (2007) Growth of stylolite teeth patterns depending on normal stress and finite compaction. Earth and Planetary Science Letters, 257(3-4), pp. 582-595. (doi:10.1016/j.epsl.2007.03.015)

Iacopini, D., Passchier, C., Koehn, D. and Carosi, R. (2007) Fabric attractors in general triclinic flow systems and their application to high strain shear zones: A dynamical system approach. Journal of Structural Geology, 29(2), pp. 298-317. (doi:10.1016/j.jsg.2006.10.002)

Koehn, D. , Malthe-Sørenssen, A. and Passchier, C. (2006) The structure of reactive grain-boundaries under stress containing confined fluids. Chemical Geology, 230(3-4), pp. 207-219. (doi:10.1016/j.chemgeo.2006.02.026)

Koehn, D. , Dysthe, D. K. and Jamtveit, B. (2004) Transient dissolution patterns on stressed crystal surfaces. Geochimica et Cosmochimica Acta, 68(16), pp. 3317-3325. (doi:10.1016/j.gca.2004.02.004)

Koehn, D. , Arnold, J., Jamtveit, B. and Malthe-Sørenssen, A. (2003) Instabilities in stress corrosion and the transition to brittle failure. American Journal of Science, 303(10), pp. 956-971. (doi:10.2475/ajs.303.10.956)

Koehn, D. , Bons, P.D. and Passchier, C.W. (2003) Development of antitaxial strain fringes during non-coaxial deformation: an experimental study. Journal of Structural Geology, 25(2), pp. 263-275. (doi:10.1016/S0191-8141(02)00022-6)

Walte, N. P., Bons, P. D., Passchier, C. W. and Koehn, D. (2003) Disequilibrium melt distribution during static recrystallization. Geology, 31(11), pp. 1009-1012. (doi:10.1130/G19815.1)

Hilgers, C., Koehn, D. , Bons, P.D. and Urai, J.L. (2001) Development of crystal morphology during unitaxial growth in a progressively widening vein: II. Numerical simulations of the evolution of antitaxial fibrous veins. Journal of Structural Geology, 23(6-7), pp. 873-885. (doi:10.1016/S0191-8141(00)00160-7)

Koehn, D. , Aerden, D.G.A.M., Bons, P.D. and Passchier, C.W. (2001) Computer experiments to investigate complex fibre patterns in natural antitaxial strain fringes. Journal of Metamorphic Geology, 19(2), pp. 217-231. (doi:10.1046/j.0263-4929.2000.00305.x)

Koehn, D. , Hilgers, C., Bons, P. D. and Passchier, C. W. (2000) Numerical simulation of fibre growth in antitaxial strain fringes. Journal of Structural Geology, 22(9), pp. 1311-1324. (doi:10.1016/S0191-8141(00)00039-0)

Koehn, D. (2000) Shear sense indicators in striped bedding-veins. Journal of Structural Geology, 22(8), pp. 1141-1151. (doi:10.1016/S0191-8141(00)00028-6)

This list was generated on Tue Oct 16 13:33:53 2018 BST.