Dr. Christopher Hamann

Peer-reviewed publications in journals

Moreau, J.-G., Jõeleht, A., Stojic, A. N., Hamann, C., Kaufmann, F. E. D., Somelar, P., Plado, J., Hietala, S., Kohout, T. (2024) Experimentally induced troilite melt pervasion in chondritic analog materials: A study for FeNi‐FeS darkening in chondrites. Meteoritics & Planetary Science 59, 3229–3249. https://doi.org/10.1111/maps.14274

Tada, T., Kurosawa, K., Tomioka, N., Nagaya, T., Isa, J., Hamann, C., Ono, H., Niihara, T., Okamoto, T., Matsui T., (2024) Detailed occurrence of feather features in quartz in experimentally shocked granite. Journal of Geophysical Research: Planets 129, e2024JE008409. https://doi.org/10.1029/2024JE008409

Genge, M. J., Alesbrook, L., Almeida, N. V., Bates, H. C., Bland, P. A., Boyd, M. R., Burchell, M. J., Collins, G. S., Cornwell, L. T., Daly, L., Devillepoix, H. A. R., Van Ginneken, M., Greshake, A., Hallatt, D., Hamann, C., Hecht, L., Jenkins, L. E., Johnson, E., Jones, R., King, A. J., Mansour, H., McMullan, S., Mitchell, J. T., Rollinson, G., Russell, S. S., Schröder, C., Stephen, N. R., Suttle, M. D., Tandy, J. D., Trimby, P., Sansom, E. K., Spathis, V., Willcocks, F. M., Wozniakiewicz, P. J. (2024) The fusion crust of the Winchcombe meteorite: A preserved record of atmospheric entry processes. Meteoritics & Planetary Science 59, 948–972. https://doi.org/10.1111/maps.13937

Hamann, C., Piehl, P., Weingart, W., Stolle, D., Al-Sabbagh, D., Ostermann, M., Auer, G., Adam C. (2024) Selective removal of zinc and lead from electric arc furnace dust by chlorination–evaporation reactions. Journal of Hazardous Materials 465, 133421. https://doi.org/10.1016/j.jhazmat.2023.133421

Hamann, C., Kurosawa, K., Ono, H., Tada, T., Langenhorst, F., Pollok, K., Genda, H., Niihara, T., Okamoto, T., Matsui, T. (2023) Experimental evidence for shear‐induced melting and generation of stishovite in granite at low (<18 GPa) shock pressure. Journal of Geophysical Research: Planets 128, e2023JE007742. https://doi.org/10.1029/2023JE007742

Ormö, J., Raducan, S.-D., Jutzi, M., Herreros, M. I., Luther, R., Collins, G. S., Wünnemann, K., Mora-Rueda, M., Hamann, C. (2022) Boulder exhumation and segregation by impacts on rubble-pile asteroids. Earth and Planetary Science Letters 594, 117713. https://doi.org/10.1016/j.epsl.2022.117713

Sadowski, E.-M., Schmidt, A. R., Seyfullah, L. J., Solórzano-Kraemer, M. M., Neumann, C., Perrichot, V., Hamann, C., Milke, R., Nascimbene, P. (2021) Conservation, preparation and imaging of diverse ambers and their inclusions. Earth-Science Reviews 220, 103653. https://doi.org/10.1016/j.earscirev.2021.103653

Hamann, C., Spanka, M., Stolle, D., Auer, G., Weingart, E., Al-Sabbagh, D., Ostermann, M., Adam, C. (2021) Recycling of blast-furnace sludge by thermochemical treatment with spent iron (II) chloride solution from steel pickling. Journal of Hazardous Materials 402, 123511. https://doi.org/10.1016/j.jhazmat.2020.123511

Morlok, A., Hamann, C., Martin, D., Weber, I., Joy, K. H., Hiesinger, H., Wogelius, R., Stojic, A., Helbert, J. (2020) Mid-infrared spectroscopy of laser-produced basalt melts for remote sensing application. Icarus 355, 113410. https://doi.org/10.1016/j.icarus.2019.113410

McKibbin, S., Pittarello, L., Makarona, C., Hamann, C., Hecht, L., Chernonozhkin, S. M., Goderis, S., Claeys, P. (2019) Petrogenesis of main group pallasite meteorites based on relationships among texture, mineralogy, and geochemistry. Meteoritics & Planetary Science. https://doi.org/10.1111/maps.13392

Hamann, C., Bläsing, S., Hecht, L., Schäffer, S., Deutsch, A., Osterholz, J., Lexow, B. (2018) The reaction of carbonates in contact with laser-generated, superheated silicate melts: Constraining impact metamorphism of carbonate-bearing target rocks. Meteoritics & Planetary Science 53, 1644–1686. https://doi.org/10.1111/maps.13133

Hamann, C., Fazio, A., Ebert, M., Hecht, L., Wirth, R., Folco, L., Deutsch, A., Reimold, W. U. (2018) Silicate liquid immiscibility in impact melts. Meteoritics & Planetary Science 53, 1594–1632. http://dx.doi.org/10.1111/maps.12907

Stöffler, D., Hamann, C., Metzler, K. (2017) Schock metamorphism of planetary silicate rocks and sediments: Proposal for an updated classification system. Meteoritics & Planetary Science 53, 5–49. https://doi.org/10.1111/maps.12912

Ebert, M., Hecht, L., Hamann, C., Luther, R. (2017) Laser-induced melting experiments: Simulation of short-term high-temperature impact processes. Meteoritics & Planetary Science, 52, 1475–1494. http://dx.doi.org/10.1111/maps.12809

Van Roosbroek, N., Hamann, C., McKibbin, S., Greshake, A., Wirth, R., Pittarello, L., Hecht, L., Claeyes, P., Debaille, V. (2017) Immiscible silicate liquids and phosphoran olivine in Netschaëvo IIE silicate: Analogue for planetesimal core–mantle boundaries. Geochmimica et Cosmochimica Acta, 192, 295–317. http://dx.doi.org/10.1016/j.gca.2016.10.042

Hamann, C., Luther, R., Ebert, M., Hecht, L., Deutsch, A., Wünnemann, K., Schäffer, S., Osterholz, J., Lexow, B. (2016) Correlating laser-generated melts with impact-generated melts: An integrated thermodynamic–petrologic approach. Geophysical Reserach Letters, 43, 10602–10610. Open Access: http://dx.doi.org/10.1002/2016GL071050

Hamann, C., Stöffler, D., Reimold, W. U. (2016) Interaction of aluminum projectiles with quartz sand in impact experiments: Formation of khatyrkite (CuAl2) and reduction of SiO2 to Si. Geochmimica et Cosmochimica Acta, 192, 295–317. http://dx.doi.org/10.1016/j.gca.2016.07.018

Hamann, C., Hecht, L., Ebert, M., Wirth, R. (2013) Chemical projectile–target interaction and liquid immiscibility in impact glass from the Wabar craters, Saudi Arabia. Geochmimica et Cosmochimica Acta, 121, 291–310. http://dx.doi.org/10.1016/j.gca.2013.07.030

Current research

• Insights into space weathering of C-type asteroid regolith from microanalysis of samples of asteroid Ryugu (in collaboration with the Institute of Planetary Research, DLR)
• Petrology of the Ribbeck aubrites
• Insights into impact processes and products from meteorites
• Formation of impact melts in terrestrial impact structures

Brief CV

Since 06/2024: Senior Scientist and Head of µXRF and Raman laboratories, Museum für Naturkunde Berlin, Department of Solar Sytem, Impacts & Meteorites

09/2019 – 05/2024: Post-doc, Museum für Naturkunde Berlin, Department of Solar Sytem, Impacts & Meteorites

06/2018 – 08/2019: Post-doc, Bundesanstalt für Materialforschung und -prüfung, Berlin

02/2018: PhD thesis, Titel: "Projectile-target interaction and rapid, high-temperature geochemical processes in impact melts", summa cum laude (with honors), Freie Universität Berlin

Tasks

• Senior Scientist, Department of Solar System, Impacts & Meteorites
• Head of Micro X-ray Fluorescence Lab
• Head of Raman Spectroscopy Lab

Research interests

• Formation, petrology, and geochemistry of impact melts 
• Impact processes on asteroids
• Non-destructive analysis of meteorites

Publications (selection)

Hamann, C., Kurosawa, K., Ono, H., Tada, T., Langenhorst, F., Pollok, K., Genda, H., Niihara, T., Okamoto, T., Matsui, T. (2023) Experimental evidence for shear‐induced melting and generation of stishovite in granite at low (<18 GPa) shock pressure. Journal of Geophysical Research: Planets 128, e2023JE007742. https://doi.org/10.1029/2023JE007742

Morlok, A., Hamann, C., Martin, D., Weber, I., Joy, K. H., Hiesinger, H., Wogelius, R., Stojic, A., Helbert, J. (2020) Mid-infrared spectroscopy of laser-produced basalt melts for remote sensing application. Icarus 355, 113410. https://doi.org/10.1016/j.icarus.2019.113410

Hamann, C., Fazio, A., Ebert, M., Hecht, L., Wirth, R., Folco, L., Deutsch, A., Reimold, W. U. (2018) Silicate liquid immiscibility in impact melts. Meteoritics & Planetary Science 53, 1594–1632. http://dx.doi.org/10.1111/maps.12907

Stöffler, D., Hamann, C., Metzler, K. (2017) Schock metamorphism of planetary silicate rocks and sediments: Proposal for an updated classification system. Meteoritics & Planetary Science 53, 5–49. https://doi.org/10.1111/maps.12912

Hamann, C., Luther, R., Ebert, M., Hecht, L., Deutsch, A., Wünnemann, K., Schäffer, S., Osterholz, J., Lexow, B. (2016) Correlating laser-generated melts with impact-generated melts: An integrated thermodynamic–petrologic approach. Geophysical Reserach Letters, 43, 10602–10610. Open Access: http://dx.doi.org/10.1002/2016GL071050

Hamann, C., Hecht, L., Ebert, M., Wirth, R. (2013) Chemical projectile–target interaction and liquid immiscibility in impact glass from the Wabar craters, Saudi Arabia. Geochmimica et Cosmochimica Acta, 121, 291–310. http://dx.doi.org/10.1016/j.gca.2013.07.030