Dr. Anja Allabar



Position: Research Associate in Mineralogy

Area of expertise: exsolution of volatiles during melt decompression, H2O solubility and diffusivity in silicate melts, FTIR spectroscopy, Raman spectroscopy, IHPV experiments, CSPV experiments



Research Interests

In my research I experimentally investigate the degassing processes and properties of magmas that are not directly accessible for observation in nature. I conduct experiments at high pressure and temperature to simulate the conditions of magmas at depth. My work focuses on the bubble formation and degassing processes in silicate melts of different composition upon magma ascent and the solubility and diffusivity of volatiles in silicate melts under varying pressure and temperature conditions. This combined knowledge is important to understand the onset of volcanic eruptions and their explosive potential.



Profile

since 01/2021: Wissenschaftliche Mitarbeiterin (Research Associate) at the Department of Mineralogy, University of Göttingen
06/2017 – 12/2020: PhD studies in experimental Mineralogy at the University of Tuebingen, DE

PhD thesis: Phase separation, degassing, and resorption of H2O in phonolitic melt investigated by decompression experiments

08/2014 – 02/2017: MSc studies in Earth Sciences at the University of Tuebingen, DE

Master thesis: Experimental degassing of Vesuvian melt: fragmentation of the Toramaru model?

07/2014 – 12/2014: Erasmus+ Semester at the University of Iceland, Reykjavík, IS

10/2010 – 07/2014: BSc studies in Earth Sciences at the University of Tuebingen, DE

Bachelor thesis: Pilotstudie zum Halogen-Austausch in Fluor-Phlogopit unter hydrothermalen Bedingungen



Awards

2020: Bernd Rendel Prize, awarded by the German Science Foundation (DFG)
2019: Paul Ramdohr award for the best oral presentation of young scientists at the GeoBonn 2018 conference, awarded by the German Mineralogical Society (DMG)


Publications


González-García, D., Giordano, D., Allabar, A., Andrade, F.R.D, Polo, L.A., Janasi, V.A., Lucchetti, A.C.F., Hess, K.U., De Campos, C., Dingwell, D.B. (2021). Retrieving dissolved H2O content from micro-Raman spectroscopy on nanolitized silicic glasses: Application to volcanic products of the Paraná Magmatic Province, Brazil. Chemical Geology, 120058. doi

Giordano, D. et al. (2020). Viscosity of Palmas-type magmas of the Paraná Magmatic Province (Rio Grande do Sul State, Brazil): Implications for high-temperature silicic volcanism. Chemical Geology, 560, 119981. doi

Allabar, A. & Nowak, M. (2020) High spatial resolution analysis of H2O in silicate glass using attenuated total reflection FTIR spectroscopy coupled with a focal plane array detector. Chemical Geology, 556, 119833. doi

Dobson, K.J .et al. (2020). Quantifying microstructural evolution in moving magma. Frontiers in Earth Science, 8, 287. doi

Allabar, A., Dobson, J.K., Bauer, C.C. & Nowak, M. (2020). Vesicle shrinkage in hydrous phonolitic melt during cooling. Contributions to Mineralogy and Petrology, 175, 21. doi

Allabar, A., Salis Gross, E. & Nowak, M. (2020). The effect of initial H2O concentration on decompression-induced phase separation and degassing of hydrous phonolitic melt. Contributions to Mineralogy and Petrology, 175, 22. doi

Colombier, M., Wadsworth, F.B., Scheu, B., Vasseur, J., Dobson, J.K., Cáceres, F., Allabar, A., Marone, F., Schlepütz, C.M. & Dingwell, D.B. (2020). In situ observation of the percolation threshold in multiphase magma analogues. Bulletin of Volcanology, 82, 32. doi

Allabar, A. & Nowak, M. (2018). Message in a bottle: Spontaneous phase separation of hydrous Vesuvius melt even at low decompression rates. Earth and Planetary Science Letters, 501, 192-201. doi