Tobias P. Fischer

Ph.D., Arizona State University, 1999 (Professor; Director, Volatiles Laboratory)
(505) 277-0683 Email:

Research and Academic Interests:

Volcanology with emphasis on active volcanism. Geochemistry of fluids discharging from active volcanoes and hydrothermal systems. Flux of volatiles from magmas to the atmosphere during magma ascent and eruption. Element cycling from the mantle and crust to the atmosphere through volcanism and active faulting. Volatile composition of melts and their influence on eruption style. Diffuse degassing of CO2 from continental rift systems. Field remote sensing, direct sampling and analyses of volcanic and hydrothermal fluids. Current field research areas are in Central America, the Aleutians, the East African Rift and Antarctica.  Current Chair of the Board of Directors for the Deep Carbon Observatory Deep Carbon Degassing (DCO-DECADE) Initiative.

List of Related Web Links:

Tobias P. Fischer Personal Page

Listing of Recent Publications:

Lee, H; Muirhead, J.D.; Fischer, T.P.; Ebinger, C.J.; Kattenhorn, S.A.; Sharp, Z.D.; Kianji, G. (2015) Massive and prolonged deep carbon emissions associated with continental rifting. Nature Geosci. AOP doi:10.1038/ngeo2622

Sano, Y., Kagoshima, T., Takahata, N., Nishio, Y., Roulleau, E, Pinti, D.L., Fischer, T.P. (2015) Ten years helium anomaly prior to the 2014 Mt Ontake eruption. Scientific Reports 5, Article number: 13069 (2015) doi:10.1038/srep13069

Lee, H., Sharp, Z.D., Fischer, T.P. (2015) Kinetic nitrogen isotope fractionation between air and dissolved N2 in water: Implications for hydrothermal systems Geochem. J. 49 (5) 571-573 

Fischer, T.P. and Chiodini, G. (2015) Volcanic, Magmatic and Hydrothermal Gas Discharges.  Encyclopedia of Volcanoes, 2nd Edition p. 779- 797 

Fischer T.P., Ramirez C., Mora-Amador R, Hilton D.R., Barnes J. D., Sharp Z.D., Le Brun M., de Moor J.M., Barry P.H., Füri E.,  Shaw A.M. (2015). Temporal variations in fumarole gas chemistry at Poás volcano, Costa Rica. J. Volcanol. Geotherm. Res. 294, 56-70

Kagoshima, T., Sano, Y., Takahata, N., Maruoka, T., Fischer, T.P., Hattori, K. (2015). Sulfur geodynamic cycle. Scientific Reports 5 : 8330 | DOI: 10.1038/srep08330

Fischer, T.P., Burnard, P., Marty, B., Hilton, D.R., Furi, E., Palhol, F., Sharp, Z.D., Mangasini, F. (2009) Upper-mantle volatile chemistry at Oldoinyo Lengai volcano and the origin of carbonatites Nature, 459, 77-80 doi:10.1038/nature07977

Oppenheimer C, Fischer TP, Scaillet B (2014) Volcanic degassing: processes and impact. Treatise on Geochemistry (second edition), Volume 4, the crust p.111 – 179 

Zelenski, ME, Fischer, TP, de Moor, JM, Marty, B, Zimmermann, L, Ayalew, D, Nekrasov, AN, Karandashev, VK (2013) Trace elements in the gas emissions from the Erta Ale volcano, Afar, Ethiopia Chem. Geol. 357, 95-116

de Moor JM, Fischer TP, Sharp, ZD, King, PL, Wilke, M, Botcharnikov, RE, Cottrell, E, Zelenski, M, Marty, B, Klimm, K, Rivard, C, Ayalew, D, Ramirez C, and Kelley, KA. Erta (2013) Sulfur degassing at Erta Ale (Ethiopia) and Masaya (Nicaragua) volcanoes: Implications for the degassing processes and oxygen fugacities of basaltic systems, Geochem. Geophys. Geosyst. doi: 10.1002/ggge.20255

de Moor JM, Fischer TP, King, P.E; Bocharnikov, R, Hervig, R, Hilton, DR, Barry, P., Mangasini F, Ramirez C (2013) Volatile-rich silicate melts from Oldoinyo Lengai volcano 1 (Tanzania): Implications for carbonatite genesis and eruptive behavior. Earth and Planet. Sci. Letters, 361, 379-390

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