Petrologie und Geochemie Dr. Maren Kahl Research Interests Igneous petrology and diffusion chronometry. My research focuses on using diffusion-based geochronometers to investigate the timescales and durations of transcrustal magma transfer processes in diverse volcanic settings, including Sicily (Mt. Etna), Hawaii (Mauna Loa), and Iceland (Snæfellsnes Volcanic Zone, Reykjanes Peninsula, and Eastern Volcanic Zone). Collaborations: Dr. E. Bali; Dr. G.H. Guðfinnsson; Dr. S.A. Halldórsson; Dr. E. Marshall; Dr. A. Caracciolo (University of Iceland) Dr. D.A. Neave (University of Manchester, UK) Dr. D.J. Morgan (University of Leeds, UK) Dr. E.J. Mutch (Nanyang Technological University, Singapore) Dr. K.J. Lynn; Dr. F.A. Trusdell (USGS Hawaiian Volcano Observatory, US) Prof. J. Barnes (University of Texas, Austin, US) Dr. P.E. Wieser (University of California, Berkely, US) T. Ludwig (Universität Heidelberg, Germany) Dr. A. Hertwig (Curtain University, Australia) Publication List Ranta, E., Halldórsson, S.A., Óladóttir, B.A., Pfeffer, M.A., Caracciolo, A., Bali, E., Guðfinnsson, G.H., Kahl, M., Barsotti, S. (2024). Magmatic Controls on Volcanic Sulfur Emissions at the Iceland Hotspot. Geochemistry, Geophysics, Geosystems, 25, e2024GC011443. DOI: https://doi.org/10.1029/2024GC011443 Kahl, M., Morgan, D.J., Thornber, C., Walshaw, R., Lynn, K.J., Trusdell, F.A. (2023). Dynamics of magma mixing and magma mobilisation beneath Mauna Loa – insights from the 1950 AD Southwest Rift Zone eruption. Bulletin of Volcanology, 85:75. DOI: https://doi.org/10.1007/s00445-023-01680-x Caracciolo, A., Bali, E., Halldórsson, S.A., Guðfinnsson, G.H., Kahl, M., Þórðardóttir, I., Pálmadóttir, G.L., Silvestri, V. (2023). Magma plumbing architectures and timescales of magmatic processes during historical magmatism on the Reykjanes Peninsula, Iceland. In revision with Earth and Planetary Science Letters, 621, 118378. DOI: https://doi.org/10.1016/j.epsl.2023.118378 Kahl, M., Mutch, E.J.F., Maclennan, J., Morgan, D.J., et al. (2022). Deep magma mobilization years before the 2021 CE Fagradalsfjall eruption, Iceland. Geology, 51, 184-188. DOI: https://doi.org/10.1130/G50340.1 Couperthwaite, F.K., Morgan, D.J., Harvey, J.H., Kahl, M. (2022). Pre-eruptive timescales from the historical Hapaimamo eruption at Mauna Loa, Hawai ‘i. Journal of Volcanology and Geothermal Research, 432, 107690. DOI: https://doi.org/10.1016/j.jvolgeores.2022.107690 Caracciolo, A., Halldórsson, S.A., Bali, E., Marshall, E.W., Guðfinnsson, G.H., Kahl, M., Hartley, M.E., Barnes, J.D., Jeon, H., Whitehouse, M.J. (2022). Oxygen isotope evidence for progressively assimilating trans-crustal magma plumbing systems in Iceland. Geology, 50, 796-800. DOI: https://doi.org/10.1130/G49874.1 Van der Meer, Q.H.A, Bali, E., Guðfinnsson, G.H., Kahl, M. & Rasmussen, M.B. (2021). Warm and slightly reduced mantle under the off-rift Snæfellsnes Volcanic Zone, Iceland. Journal of Petrology, 62 (12), egab057. DOI: https://doi.org/10.1093/petrology/egab057 Kahl, M., Bali, E., Guðfinnsson, G.H., Neave, D.A., Ubide, T., Van Der Meer, Q.A.H., Matthews, S. (2021). Conditions and dynamics of magma storage in the Snæfellsnes volcanic zone (SNVZ), Western Iceland: insights from the Búðahraun and Berserkjahraun eruptions. Journal of Petrology 62 (9), egab054. DOI: https://doi.org/10.1093/petrology/egab054 Lloyd, G.E., Lee, A.L., Kahl, M. (2021). A practical method to determine the five-parameter orientation of intragranular boundaries in polycrystals. Tectonophysics 814, 228955. https://doi.org/10.1016/j.tecto.2021.228955 Caracciolo, A., Kahl, M., Bali, E., Guðfinnsson, G.H., Halldórsson, S.A., Hartley, M.E. (2021). Timescales of crystal mush mobilization in the Bárðarbunga-Veiðivötn volcanic system based on olivine diffusion chronometry. American Mineralogist 106, 1083–1096. https://doi.org/10.2138/am-2021-767 Nikkola, P., Bali, E., Kahl, M., van der Meer, Q., Rämö, O.T., Guðfinnsson G.H., and Þórðarson, Þ. (2019). Mid-crustal storage and crystallization of Eyjafjallajökull ankaramites, South Iceland. Jökull 69. Magee, R., Ubide, T., Kahl, M. (2020). The lead-up to Mount Etna's most destructive historic eruption (1669). Cryptic recharge recorded in clinopyroxene. Journal of Petrology 61 (1), egaa025. DOI: https://doi.org/10.1093/petrology/egaa025 Caracciolo, A., Bali, E., Guðfinnsson, G.H., Kahl, M., Halldórsson, S.A., Hartley, M.E., Gunnarsson, Haraldur (2020). Temporal evolution of magma and crystal mush storage conditions in the Bárðarbunga-Veiðivötn volcanic system, Iceland. Lithos 352-353, 105234. DOI: http://doi.org./10.1016/j.lithos.2019.105234 Neave, D.A., Bali, E., Guðfinnsson, G.H., Halldórsson, S.A., Kahl, M., Schmidt, A.-S. and Holtz, F. (2019). Clinopyroxene–liquid equilibria and geothermobarometry in natural and experimental tholeiites: the 2014–2015 Holuhraun eruption, Iceland. Journal of Petrology 60, 8, 1653–1680. DOI: http://doi.org./10.1093/petrology/egz042 Kahl, M., Viccaro, M., Ubide, T., Morgan, D.J. & Dingwell, D.B. (2017). A branched magma feeder system during the 1669 eruption of Mt. Etna: evidence from a time-integrated study of zoned olivine phenocryst populations. Journal of Petrology 58, 3, 443-472. DOI: https://doi.org/10.1093/petrology/egx022 Kahl, M., Chakraborty, S., Pompilio & Costa, F. (2015) Constraints on the nature and evolution of the magma plumbing system beneath Mt. Etna (1991-2008) from a combined thermodynamic and kinetic modelling of the compositional record of minerals, Journal of Petrology 56, 10, 2025-2068. https://doi.org/10.1093/petrology/egv063 Kahl, M., Chakraborty, S., Costa, F., Pompilio, M., Liuzzo, M. & Viccaro, M. (2013) Compositionally zoned crystals and real-time degassing data reveal changes in magma transfer dynamics during the 2006 summit eruptive episodes of Mt. Etna. Bulletin of Volcanology 75:692. DOI: http://dx.doi.org/10.1007/s00445-013-0692-7 Kahl, M., Chakraborty, S., Costa, F. & Pompilio, M. (2011) Dynamic plumbing system beneath volcanoes revealed by kinetic modelling, and the connection to monitoring data: An example from Mt. Etna. Earth and Planetary Science Letters 308, 11-22. DOI: http://dx.doi.org./10.1016/j.epsl.2011.05.008 Education 2011 - Dr. rer. nat. Degree, Ruhr-Universität Bochum Dissertation: Timescales of magma mixing and magma recharge - a case study from Mt. Etna (Sicily, Italy) 2005 - Diploma Mineralogy, Universität Heidelberg. Thesis: The chemical internal structure of phenocrysts from the Laacher See-Tephra (East Eifel volcanic field, Germany) including Li, Be and B. Positions held and professional experience Since October 2024: Scientific Coordinator DFG research unit 2881: Diffusion Chronometry of magmatic systems, Ruhr-Universität Bochum, Germany April 2023 – October 2024: Vertretungsprofessur (W2) /substitute professorship – Isotope Geology and Petrology, Institute of Earth Sciences, Universität Heidelberg, Germany 2019-2023: Postdoctoral researcher (DFG project grant; PI: M. Kahl), Institute of Earth Sciences, Universität Heidelberg, Germany 2016-2019: Rannís (Icelandic Centre for Research) Postdoctoral Research Fellow, Institute of Earth Sciences, University of Iceland, Reykjavík, Iceland 2014-2016: Postdoctoral research & teaching fellow Department for Earth and Environmental Sciences, Ludwig-Maximilians-Universität (LMU) München, Germany May – July 2014: Reserve instrument manager, electron micro-beam facility, LEMAS (Leeds Electron Microscopy and Spectroscopy) Centre, University of Leeds, UK 2012-2014: Postdoctoral Research Fellow (DFG fellowship), School of Earth & Environment, University of Leeds, UK Media outreach Interview with Science Magazine, November 17, 2016 ‘Smudged volcanic crystals offer clues to past eruptions’ (http://www.sciencemag.org/news/2016/11/smudged-volcanic-crystals-offer-clues-past-eruptions) Interview with Eos, February 2023, ‘Crystals Track Magma Movement Beneath Iceland’ (https://eos.org/articles/crystals-track-magma-movement-beneath-iceland) Invited talks 2024 Invited seminar talk at Eberhard Karls Universität Tübingen, Germany, February 2024 2023 Invited speaker at EGU (European Geosciences Union) General Assembly 2023, Vienna, Austria, April, 2023 2022 Invited seminar talk at Albert-Ludwigs-Universität Freiburg, Germany, December, 2022 2022 Invited keynote talk at Goldschmidt 2022, Hawaii, USA 2022 Invited seminar talk at Friedrich-Schiller-Universität Jena, Germany, July, 2022 2021 Invited seminar talk at Universität zu Köln, Germany, December, 2021 2021 Invited seminar talk at ‘A seminar series on diffusion modelling to determine timescales of processes (Diffusion Chronometry), online event by Ruhr-Universität Bochum, Germany 2019 Invited keynote talk at GeoMünster 2019, Annual meeting of the DGGV and DMG, Münster, Germany, September, 2019 2019 Invited speaker at Goldschmidt 2019, Barcelona, Spain, August, 2019 2019 Invited seminar talk at Universität Heidelberg, Germany, January, 2019 2018 Invited lecturer at DMG (Deutsche Mineralogische Gesellschaft) Diffusion short course, Ruhr-Universität Bochum, Germany, October, 2018 2017 Invited seminar talk at Universität Göttingen, Germany, January, 2017 2016 Invited speaker at EGU (European Geosciences Union) General Assembly 2016, Vienna, Austria, April, 2016 2016 Invited seminar talk at Universität Erlangen, Germany, January, 2016 2015 Invited lecturer at DMG (Deutsche Mineralogische Gesellschaft) Diffusion short course, Ruhr-Universität Bochum, Germany, August, 2015 2014 Invited seminar talk at ETH Zurich, Switzerland, June, 2014 2012 Invited seminar talk at David A. Johnston Cascades Volcano Observatory – USGS, Vancouver WA, USA, June, 2012 2012 Invited speaker at DMG (Deutsche Mineralogische Gesellschaft) & MSA (Mineralogical Society of America) Diffusion short course, Ruhr-Universität Bochum, Germany, October, 2012 2012 Invited keynote talk at AGU (American Geophysical Union) Fall Meeting 2012, San Francisco CA, USA, December, 2012 2008 Invited speaker at AGU (American Geophysical Union) Fall Meeting 2008, San Francisco CA, USA, December, 2008 2007 Invited seminar talk at Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Palermo, Italy, May, 2007