Prof. Dr. Daniel Köhn
Prof. Daniel Koehn
Geozentrum Nordbayern
Professur für Tektonik
91054 Erlangen, Germany
- Telefon: +49 9131 85-22626
- E-Mail: daniel.koehn@fau.de
- Webseite: https://www.gzn.nat.fau.de/strukturgeologie/staff/prof-dr-daniel-koehn/
Projects
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Action for Research and Teaching Mining exploration Inclusive School
(Drittmittelfinanzierte Gruppenförderung – Teilprojekt)
Titel des Gesamtprojektes: Action for Research and Teaching Mining exploration Inclusive School
Laufzeit: 1. November 2021 - 31. Oktober 2024
Mittelgeber: Europäische Union (EU) -
IVAC – International Virtual Academic Collaboration 2021-2022
DAAD
International online course "Ethical Global Partnerships and Sustainable Resources"(Drittmittelfinanzierte Einzelförderung)
Laufzeit: 1. Oktober 2021 - 30. September 2022
Mittelgeber: Deutscher Akademischer Austauschdienst (DAAD) -
P13 – Modelling of the development of deformation bands in porous rocks and their influence on the permeability evolution of reservoirs
(Drittmittelfinanzierte Gruppenförderung – Teilprojekt)
Titel des Gesamtprojektes: GRK 2423 FRASCAL: Skalenübergreifende Bruchvorgänge: Integration von Mechanik, Materialwissenschaften, Mathematik, Chemie und Physik (FRASCAL)
Laufzeit: 1. April 2019 - 30. September 2023
Mittelgeber: DFG / Graduiertenkolleg (GRK)An extended DEM approach with multi-scale aggregates and healing algorithms will be used to study structures on the grain and single-band scale, whereas the reservoir scale flow properties will be determined with continuum models. Codes will be developed and tested simultaneously and natural examples from our rock collection and field examples can be used in the other projects. We will then develop an algorithm for the healing of fractured grains and will finally approach the large scale and look at the influence of deformation bands on the permeability of aquifers. Here we will vary mechanical content in bands, deformation conditions from shear to compaction, compactional and extensional shear, and finite strain.
Publications
Beiträge in Fachzeitschriften
- Bons, P.D., Cao, D., De Riese, T., Gonzalez-Esvertit, E., Köhn, D., Naaman, I.,... Gomez-Rivas, E. (2022). A review of natural hydrofractures in rocks. Geological Magazine. https://dx.doi.org/10.1017/S0016756822001042
- Köhn, D., Kelka, U., Toussaint, R., Siegel, C., Mullen, G., Boyce, A., & Piazolo, S. (2022). Outcrop scale mixing enhanced by permeability variations: the role of stationary and travelling waves of high saturation indices. Geological Magazine. https://dx.doi.org/10.1017/S001675682200070X
- Köhler, S., Duschl, F., Fazlikhani, H., Köhn, D., Stephan, T., & Stollhofen, H. (2022). Reconstruction of cyclic Mesozoic-Cenozoic stress development in SE Germany using fault-slip and stylolite inversion. Geological Magazine. https://dx.doi.org/10.1017/S0016756822000656
- Köhn, D., Köhler, S., Toussaint, R., Ghani, I., & Stollhofen, H. (2022). Scaling analysis, correlation length and compaction estimates of natural and simulated stylolites. Journal of Structural Geology, 161. https://dx.doi.org/10.1016/j.jsg.2022.104670
- Molli, G., Köhn, D., Allacorta, L., Danese, L., Zampelli, S., & Zazzeri, M. (2022). Superimposed structures, incremental strain and deformation path from field data to modelling: A case study from the Alpi Apuane metamorphic core complex (NW Tuscany, Italy). Journal of Structural Geology, 161. https://dx.doi.org/10.1016/j.jsg.2022.104676
- Centrella, S., Beaudoin, N.E., Köhn, D., Motte, G., Hoareau, G., & Callot, J.P. (2022). How fluid-mediated rock transformations can mimic hydro-fracturing patterns in hydrothermal dolomite. Marine and Petroleum Geology, 140. https://dx.doi.org/10.1016/j.marpetgeo.2022.105657
- Smith, R., Lesueur, M., Kelka, U., Poulet, T., & Köhn, D. (2022). Using fractured outcrops to calculate permeability tensors: implications for geothermal fluid flow and the influence of seismic-scale faults. Geological Magazine. https://dx.doi.org/10.1017/S0016756822000309
- Gomez-Rivas, E., Martin-Martin, J.D., Bons, P.D., Köhn, D., Griera, A., Trave, A.,... Neilson, J. (2022). Stylolites and stylolite networks as primary controls on the geometry and distribution of carbonate diagenetic alterations. Marine and Petroleum Geology, 136. https://dx.doi.org/10.1016/j.marpetgeo.2021.105444
- Köhn, D., Piazolo, S., Beaudoin, N.E., Kelka, U., Spruženiece, L., Putnis, C.V., & Toussaint, R. (2021). Relative rates of fluid advection, elemental diffusion and replacement govern reaction front patterns. Earth and Planetary Science Letters, 565. https://dx.doi.org/10.1016/j.epsl.2021.116950
- Jess, S., Köhn, D., Fox, M., Enkelmann, E., Sachau, T., & Aanyu, K. (2020). Paleogene initiation of the Western Branch of the East African Rift: The uplift history of the Rwenzori Mountains, Western Uganda. Earth and Planetary Science Letters, 552. https://dx.doi.org/10.1016/j.epsl.2020.116593
- Beaudoin, N.E., Labeur, A., Lacombe, O., Köhn, D., Billi, A., Hoareau, G.,... Callot, J.-P. (2020). Regional-scale paleofluid system across the Tuscan Nappe-Umbria-Marche Apennine Ridge (northern Apennines) as revealed by mesostructural and isotopic analyses of stylolite-vein networks. Solid Earth, 11(4), 1617-1641. https://dx.doi.org/10.5194/se-11-1617-2020
- Beaudoin, N., Lacombe, O., Köhn, D., David, M.E., Farrell, N., & Healy, D. (2020). Vertical stress history and paleoburial in foreland basins unravelled by stylolite roughness paleopiezometry: Insights from bedding-parallel stylolites in the Bighorn Basin, Wyoming, USA. Journal of Structural Geology, 136. https://dx.doi.org/10.1016/j.jsg.2020.104061
- Köhn, D., Piazolo, S., Sachau, T., & Toussaint, R. (2020). Fracturing and Porosity Channeling in Fluid Overpressure Zones in the Shallow Earth's Crust. Geofluids, 2020. https://dx.doi.org/10.1155/2020/7621759
- Beaudoin, N., Lacombe, O., David, M.-E., & Köhn, D. (2020). Does stress transmission in forelands depend on structural style? Distinctive stress magnitudes during Sevier thin-skinned and Laramide thick-skinned layer-parallel shortening in the Bighorn Basin (USA) revealed by stylolite and calcite twinning paleopiezometry. Terra Nova. https://dx.doi.org/10.1111/ter.12451
- Aleksans, J., Köhn, D., Toussaint, R., & Daniel, G. (2019). Simulating Hydraulic Fracturing: Failure in Soft Versus Hard Rocks. Pure and Applied Geophysics. https://dx.doi.org/10.1007/s00024-019-02376-0
- Beaudoin, N., Lacombe, O., Roberts, N.M., & Köhn, D. (2019). U-Pb dating of calcite veins reveals complex stress evolution and thrust sequence in the Bighorn Basin, Wyoming, USA. Geology, 47(9), e481-e481. https://dx.doi.org/10.1130/G46606Y.1