 | Dr. Heidi Wehrmann
SFB 574 / IFM-GEOMAR
Wischhofstr. 1-3
DE-24148 Kiel
Germany
Ph. ++49-431-600-2568
Fax. ++49-431-600-2915
Email hwehrmann [AT] ifm-geomar.de
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Heidi joined the SFB 574 in 2001, her research has been focused on volatile degassing of explosive eruptions and the role of volatiles in the generation of mafic arc magmas since. From 2001 to 2005 she belonged to subproject C4 as a PhD student, working mainly on the mafic plinian Fontana eruption in Nicaragua, dealing with its physical eruptions dynamics and volatile chemistry via melt inclusion studies. Moreover, she was involved in establishing the tephrostratigraphic framework in Nicaragua from the late-Pleistocene to recent, and in assessing hazards emerging from large plinian eruptions. Now she is a postdoc researcher in subproject C2, with a major focus on magmatic volatiles in primitive melts, their effect on melt generation, their inventory and turnover in relation to the tectonic setting.
Educational background:
1998 – 2000: Graduate student at the Department of Earth Sciences at Waikato University, Hamilton, New Zealand; MSc (Hons) degree in Volcanology in 2000.
1994 – 1997: Student of Physical Geography and Geology at the University of Saarbrücken, Germany.
Awards:
1998 Student Research Award of the Geologic Society of New Zealand
Teaching:
2009: Summer School of the Marine Geosciences, jointly held by SFB 574 and IFM-GEOMAR, Kiel
2008: Summer School of the Marine Geosciences, jointly held by SFB 574 and IFM-GEOMAR, Kiel
1998 – 1999: Demonstrator in undergraduate courses “Practical Earth Sciences” and “Earth materials and processes” at the Department of Earth Sciences at Waikato University, Hamilton, New Zealand
Recent Diploma students:
Julia Mahlke, University of Kiel, Germany (2009): Geochemical evolution of Llaima and Villarrica Volcanoes, Central Chile.
Kai Schumann, University of Halle, Germany (2010): Geochemical investigation of the three volcanoes Casablanca, Osorno, and Cabeza de Vaca, Southern Volcanic Zone, Chile.
Publications:
Dzierma Y, Wehrmann H (accepted) On the likelihood of future eruptions in the Chilean Southern Volcanic Zone: interpreting the past century's eruption record based on statistical analyses. Andean Geology.
Wehrmann H, Hoernle K, Portnyagin M, Wiedenbeck M, Heydolph K (2011): Volcanic CO2 output at the Central American subduction zone inferred from melt inclusions in olivine crystals from mafic tephras. Geochemistry, Geophysics, Geosystems 12/6,Q06003, doi:10.1029/2010GC003412.
Völker D, Kutterolf S, Wehrmann H (2011): Comparative mass balance of volcanic edifices at the Southern Volcanic Zone of the Andes between 33°S and 46°S Journal of Volcanology and Geothermal Research 205:114-129. doi:10.1016/j.jvolgeores.2011.03.011.
Wehrmann H, Dzierma Y (2011): Applicability of statistical eruption analysis to the geologic record of Villarrica and Lanin volcanoes, Southern Volcanic Zone, Chile. Journal of Volcanology and Geothermal Research 200:99-115, doi:10.1016/j.jvolgeores.2010.11.009.
Dzierma Y, Wehrmann H (2010): Statistical eruption forecast for the Chilean Southern Volcanic Zone: typical probabilities of volcanic eruptions as baseline for possibly enhanced activity following the large 2010 Concepcion earthquake. Natural Hazards and Earth System Sciences 10:1-16, doi:10.5194/nhess-10-1-2010.
Dzierma Y, Wehrmann H (2010): Eruption time series statistically examined: Probabilities of future eruptions at Villarrica and Llaima Volcanoes, Southern Volcanic Zone, Chile. Journal of Volcanology and Geothermal Research 193:82-92, doi:10.1016/j.jvolgeores.2010.03.09.
Costantini L, Bonadonna C, Houghton BF, Wehrmann H (2009): New physical characterization of the Fontana Lapilli basaltic Plinian eruption, Nicaragua. Bulletin of Volcanology 71/3: 337-355, doi:10.1008/s00445-008-0227-9.
Kutterolf S, Freundt A, Perez W, Moerz T, Schacht U, Wehrmann H, Schmincke HU (2008) Pacific offshore record of plinian arc volcanism in Central America: 1. Along-arc variations. Geochemistry, Geophysics, Geosystems 9/2, Q02S01, doi:10.1029/2007GC001631.
Kutterolf S, Freundt A, Perez W, Wehrmann H, Schmincke HU (2007) Late-Pleistocene to Holocene temporal succession and magnitudes of highly-explosive volcanic eruptions in west-central Nicaragua. Journal of Volcanology and Geothermal Research 163: 55-82, doi:10.1016/j.volgeores.2007.02.006.
Kutterolf S, Schacht U, Wehrmann H, Freundt A, Moerz T (2007) Onshore to offshore tephrostratigraphy and marine ash layer diagenesis in Central America. In: Bundschuh J, Alvarado GA (eds) Central America – Geology, resources and hazards. Balkema, Rotterdam, Vol. 1: 395-421.
Wehrmann H, Bonadonna C, Freundt A, Houghton BF, Kutterolf S (2006): Fontana Tephra: a basaltic plinian eruption in Central Nicaragua. In: Rose WI, Bluth GJS, Carr MJ, Ewert JW, Patino LC, Vallance JW (eds.): Volcanic Hazards in Central America. Geologic Society of America special paper 412: 209-223, doi:10.1130/2006.2412(11).
Freundt A, Kutterolf S, Wehrmann H, Schmincke HU, Strauch W (2006): Eruption of the dacite to andesite zoned Mateare Tephra, and associated tsunamis in Lake Managua, Nicaragua. Journal of Volcanology and Geothermal Research 149/1-2: 103-123, doi:10.1016/j.jvolgeores.2005.06.001.
Freundt A, Kutterolf S, Schmincke HU, Hansteen THH, Wehrmann H, Perez W, Strauch W, Navarro M (2006): Volcanic hazards in Nicaragua: Past, present and future. In: Rose WI, Bluth GJS, Carr MJ, Ewert JW, Patino LC, Vallance JW (eds.): Volcanic Hazards in Central America. Geologic Society of America special paper 412: 141-165, doi:10.1130/2006.2412(08).
Wehrmann H (2005): Volatile degassing and plinian eruption dynamics of the mafic Fontana Tephra, Nicaragua. PhD thesis, University of Kiel, Germany; 111 p.
Portnyagin MV, Hansteen TH, Wehrmann H, Kutterolf S, Freundt A, Lechtenberg F (2003): Bromine concentrations in glasses from the Trodos Ophiolites (Cyprus) and Fontana Tephra (Nicaragua) determined by SYXRF: implications for bromine cycling and volcanic output at island arcs. Hasylab annual report.
Selected conference contributions:
Wehrmann H, Halama R, Garbe-Schönberg CD, Hoernle K, Jacques G, Heydolph K, Mahlke J, Schumann K (2011): On the fluid-mobility of molybdenum, tungsten, and antimony in subduction systems. Goldschmidt Conference, 14.-19.8.11, Prague, Czech Republic.
Wehrmann H, Garbe-Schönberg CD, Hoernle K, Jacques G, Heydolph K, Mahlke J, Schumann K, van den Bogaard P (2010): On the fluid-mobility of molybdenum and tungsten in subduction zone volcanics. SFB 574 subduction Workshop, Pucon, Chile.
Wehrmann H, Garbe-Schönberg CD, Jacques G, Hoernle K, Mahlke J, Schumann K (2010) Tephras from the Southern Chilean-Argentinian subduction system: high-resolution trace element analyses by LA-ICP-MS In: 10th European Workshop on Laser Ablation, Kiel, Germany.
Dzierma Y, Wehrmann H (2010) Young volcanoes in the Chilean Southern Volcanic Zone: A statistical approach to eruption prediction based on time series In: 6th Alexander von Humboldt International Conference on Climate Change, Natural Hazards, and Societies, Merida, Mexico.
Schumann K, Wehrmann H, Friese K (2009) Geochemical investigation of the three volcanoes, Casablanca, Osorno and Cabeza de Vaca, Southern Volcanic Zone, Chile In: 87. Tagung der Deutschen Mineralogischen Gesellschaft, 13.-16.09., Halle.
Voelker D, Kutterolf S, Wehrmann H (2009) The Southern Volcanic Zone of Chile: Calculation of Holocene and Pleistocene volcano volumes and relations between volume distribution and subduction parameters. Latin America Colloquium, Goettingen, Germany.
Wehrmann H, Kutterolf S, Hoernle K, Freundt A, Portnyagin M, Heydolph K (2008) Continental subduction settings: reduced transport of S and Cl to the surface? AGU international meeting, San Francisco, USA.
Wehrmann H, Hoernle K, Portnyagin M, Wiedenbeck M, Heydolph K, van den Bogaard P (2008) CO2-turnover at the Central American subduction zone: insights from melt inclusions in mafic tephras. IAVCEI international meeting, Reykjavik, Iceland.
Kutterolf S, Freundt A, Perez W, Wehrmann H, Schmincke HU (2008) Mafic Plinian eruptions: A common phenomenon at the Central American volcanic arc. IAVCEI international meeting, Reykjavik, Iceland.
Wehrmann H, Freundt A, Kutterolf S (2007): Exsolution of magmatic volatiles governing unususal eruptions: constraints on fragmentation and eruptive style of the mafic plinian Fontana eruption, Nicaragua. SubFac-SEIZE Workshop, Heredia, Costa Rica.
Wehrmann H, Freundt A, Kutterolf S (2007) Magmatic volatile degassing governing unususal eruptions: constraints on fragmentation and eruptive style of the mafic plinian Fontana eruption, Nicaragua. 97th Annual GV-Meeting and International Conference of the Geologische Vereinigung, Bremen, Germany.
Wehrmann H, Freundt A (2005) Bromine and iodine concentrations in volcanic glasses determined by Synchrotron-XRF: origin and partitioning of heavy halogens during basaltic-andesitic and rhyolitic arc magma formation at the Central American subduction zone. ECROFI XVIII (European Current Research on Fluid Inclusions) International Meeting, Siena, Italy.
Wehrmann H, Freundt A, Kutterolf S, Bonadonna C, Houghton BF, Schmincke HU (2004) Volatile release and eruptive style of a basaltic plinian eruption from Masaya Caldera, Nicaragua. IAVCEI international meeting, Pucon, Chile.
Wehrmann H, Freundt A, Kutterolf S, Schmincke HU (2003) Volatile release and eruption dynamics of the basaltic-andesitic Fontana Tephra, Nicaragua. AGU international meeting, San Francisco, USA.
Wehrmann H, Kutterolf S, Freundt A, Schmincke HU (2003) Stratigraphy and eruption dynamics of, and volatile release from, highly explosive eruptions of the Central Nicaraguan volcanic front over the last 30 ka. IAVCEI international meeting, Sapporo, Japan.
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