Prof. Dr. Francois Holtz
Institut: Institut für Mineralogie (Uni Hannover)

Adresse: Leibniz Universität Hannover

Callinstr. 3

30167 Hannover

Beprobung der Basis des Bushveld Komplexes: Bohrung durch die tiefen Bereiche der Intrusion (Mittelempfänger) (2022 - laufend)

Bildung von Rhyolithen und Bedingungen in rhyolitischen Magmakammern der “Snake River Plain” Provinz, USA. (Projektverantwortlicher) (2018 - laufend)

Distribution of H20, CO2, S and Cl between silicate melts, gas phase and minerals on the example of the Unzen volcano: application for degassing processes (Projektverantwortlicher) (2001 - 2005)

Eine Experimentelle Studie zur Bildung von Rhyoliten aus Basaltischem Ausgangsmaterial in der bimodalen Snake River Plain-Yellowstone Provinz (Mitverantwortlicher) (2014 - 2018)

Evolution of magma storage conditions along the track of Yellowstone Hotspot: investigation of the volcanic rocks from Snake River Plain (Projektverantwortlicher) (2012 - 2015)

Evolution of magma storage conditions along the track of Yellowstone Hotspot: investigation of the volcanic rocks from Snake River Plain (Projektverantwortlicher) (2010 - 2015)

Experimental study on vesiculation and formation of groundmass microlites induced by decompression: Constraints on processes related to magma ascent at Unzen volcano (Projektverantwortlicher) (2007 - 2011)

Experimentelle Untersuchungen zur Tiefenbestimmung von rhyolitischen Magmakammern in der Snake River Plain Provinz, USA. (Projektverantwortlicher) (2015 - 2016)

Experimentelle Untersuchungen zur Tiefenbestimmung von rhyolitischen Magmakammern in der Snake River Plain Provinz, USA. (Projektverantwortlicher) (2013 - 2016)

Experimentelle Untersuchungen über die Wechselwirkungen zwischen C-H-O-S Fluiden und Magmen (Projektverantwortlicher) (1997 - 2002)

Magma Reservoire und Differenzierung der mafischen Magmen der Snake River Plain Provinz (Yellowstone-Hotspot, USA): Beitrag aus der Analyse von Kristallen und Schmelzeinschlüssen in basaltischen Laven des Kimama-Bohrkerns. (Projektverantwortlicher) (2021 - laufend)

Pre-eruptive conditions of the volcanic rocks from Snake River Plain, Yellowstone Hotspot-Constraints from experiments and phase equilibria modelling (Projektverantwortlicher) (2007 - 2012)

Pre-eruptive conditions prior to and after magma mixing at Unzen volcano: constraints from high pressure experimental investigations (Projektverantwortlicher) (2004 - 2008)

Spectroscopic mineral - chemical analysis of drill cores: Development of fast 2D LIBS, EDXRF and hyperspectral scanning with application to outstanding problems of the Bushveld Complex layered intrusion (Mittelempfänger) (2021 - laufend)

Storage conditions and degassing processes of low-K and high-Al tholeiitic island-arc magmas: Experimental constraints and natural observations for Mutnovsky volcano, Kamchatka (Projektverantwortlicher) (2008 - 2012)

Understanding the crust-mantle transition from fast-spreading mid-ocean ridges: experiments and analytical studies using ICDP OmanDP drill core samples (Mittelempfänger) (2020 - laufend)

Zugehörige Publikationen

Zhang C., Li X., Almeev R.R., Horn I., Behrens H., Holtz F. (2020). " Ti-in-quartz thermobarometry and TiO2 solubility in rhyolitic melts: New experiments and parametrization" Earth and Planetary Science Letters 538 p116213

Shishkina, Tatiana A., Portnyagin, Maxim V., Botcharnikov, Roman E., Almeev, Renat R., Simonyan, Anna V., Garbe-Schönberg, Dieter, Schuth, Stephan, Oeser, Martin, Holtz, Francois (2018). "Experimental calibration and implications of olivine-melt vanadium oxybarometry for hydrous basaltic arc magmas" American Mineralogist 103 (3) p369-383

Wilke, Sören, Holtz, François, Neave, David A., Almeev, Renat (2017). "The Effect of Anorthite Content and Water on Quartz–Feldspar Cotectic Compositions in the Rhyolitic System and Implications for Geobarometry" Journal of Petrology 58 p789-818

Wilke, Sören, Klahn, Carolin, Bolte, Torsten, Almeev, Renat, Holtz, François (2015). "Experimental investigation of the effect of Ca, Fe and Ti on cotectic compositions of the rhyolitic system" European Journal of Mineralogy 27 p147-159

Bolte, Torsten, Holtz, Francois, Almeev, Renat, Nash, Barbara (2015). "The Blacktail Creek Tuff: an analytical and experimental study of rhyolites from the Heise volcanic field, Yellowstone hotspot system" Contributions to Mineralogy and Petrology p15

Shishkina, Tatiana A., Botcharnikov, Roman E., Holtz, Francois, Almeev, Renat R., Jazwa, Aleksandra M., Jakubiak, Artur A. (2014). "Compositional and pressure effects on the solubility of H2O and CO2 in mafic melts" Chemical Geology p112-129

Almeev, Renat R., Holtz, Francois, Ariskin, Alexei A., Kimura, Jun-Ichi (2013). "Storage conditions of Bezymianny Volcano parental magmas: results of phase equilibria experiments at 100 and 700 MPa" Contributions to Mineralogy and Petrology 166 p1389-1414

Almeev, Renat R., Bolte, Torsten, Nash, Barbara P., Holtz, François, Erdmann, Martin, Cathey, Henrietta E. (2012). "High-temperature, low-H2O Silicic Magmas of the Yellowstone Hotspot: an Experimental Study of Rhyolite from the Bruneau–Jarbidge Eruptive Center, Central Snake River Plain, USA" Journal of Petrology p1837-1866

Vetere, Francesco, Botcharnikov, Roman E., Holtz, Francois, Behrens, Harald, De Rosa, Rosanna (2011). "Solubility of H2O and CO2 in shoshonitic melts at 1250 °C and pressures from 50 to 400 MPa: Implications for Campi Flegrei magmatic systems" Journal of Volcanology and Geothermal Research 202 p251-261

Cichy, Sarah B., Botcharnikov, Roman E., Holtz, François, Behrens, Harald (2011). "Vesiculation and Microlite Crystallization Induced by Decompression: a Case Study of the 1991–1995 Mt Unzen Eruption (Japan)" Journal of Petrology 52 p1469-1492

Shishkina, T. A., Botcharnikov, R. E., Holtz, F., Almeev, R. R., Portnyagin, M. V. (2010). "Solubility of H2O- and CO2-bearing fluids in tholeiitic basalts at pressures up to 500 MPa" Chemical Geology 277 p115-125

Vetere, Francesco, Behrens, Harald, Holtz, Francois, Vilardo, Giuseppe, Ventura, Guido (2010). "Viscosity of crystal-bearing melts and its implication for magma ascent" Journal of Mineralogical and Petrological Sciences 105 p151-163

Botcharnikov, R. E., Almeev, R. R., Koepke, J., Holtz, F. (2008). "Phase Relations and Liquid Lines of Descent in Hydrous Ferrobasalt—Implications for the Skaergaard Intrusion and Columbia River Flood Basalts" Journal of Petrology 49 p1687-1727

Botcharnikov, Roman E., Holtz, Francois, Almeev, Renat R., Sato, Hiroaki, Behrens, Harald (2008). "Storage conditions and evolution of andesitic magma prior to the 1991–95 eruption of Unzen volcano: Constraints from natural samples and phase equilibria experiments" Journal of Volcanology and Geothermal Research 175 p168-180

Vetere, Francesco, Behrens, Harald, Schuessler, Jan A., Holtz, Francois, Misiti, Valeria, Borchers, L. (2008). "Viscosity of andesite melts and its implication for magma mixing prior to Unzen 1991–1995 eruption" Journal of Volcanology and Geothermal Research 275 p208-217

Botcharnikov, Roman E, Holtz, Francois, Behrens, Harald (2007). "The effect of CO2 on the solubility of H2O-Cl fluids in andesitic melt" European Journal of Mineralogy 19 p671-680

Botcharnikov, R. E., Behrens, H., Holtz, F. (2006). "Solubility and speciation of C–O–H fluids in andesitic melt at T = 1100–1300 °C and P = 200 and 500 MPa" Chemical Geology 229 p125-143

Sato, Hiroaki, Holtz, Francois, Behrens, Harald, Botcharnikov, Roman, Nakada, Setsuya (2005). "Experimental Petrology of the 1991–1995 Unzen Dacite, Japan. Part II: Cl/OH Partitioning between Hornblende and Melt and its Implications for the Origin of Oscillatory Zoning of Hornblende Phenocrysts" Journal of Petrology 46 (2) p339-354

Holtz, Francois, Sato, Hiroaki, Lewis, Jared, Behrens, Harald, Nakada, Setsuya (2005). "Experimental petrology of the 1991–1995 Unzen dacite, Japan. Part I: phase relations, phase composition and pre-eruptive conditions" Journal of Petrology 46 (2) p319-337

Behrens, Harald, Ohlhorst, Susanne, Holtz, Francois, Champenois, Michel (2004). "CO2 solubility in dacitic melts equilibrated with H2O-CO2 fluids: Implications for modeling the solubility of CO2 in silicic melts" Geochimica et Cosmochimica Acta 68 (22) p4687-4703

Ohlhorst, Susanne, Behrens, Harald, Holtz, François (2001). "Compositional dependence of molar absorptivities of near-infrared OH- and H2O bands in rhyolitic to basaltic glasses" Chemical Geology 174 p5-20

Tamic, Nathalie, Behrens, Harald, Holtz, François (2001). "The solubility of H2O and CO2 in rhyolitic melts in equilibrium with a mixed CO2–H2O fluid phase" Chemical Geology 174 (1-3) p333-347