John Stix

Rooyakkers, S.M., Stix, J., Berlo, K., Morgavi, D., Petrelli, M., Rusiecka, M.K., Barker, S.J., Charlier, B.L., Neave, D.A., Vetere, F.P., Perugini, D., 2022. Rifting and recharge as triggers of the mixed basalt–rhyolite Halarauður ignimbrite eruption (Krafla, Iceland). Contributions to Mineralogy and Petrology 177(3), 32.

Salas-Navarro, J., Stix, J., de Moor, J.M., 2022. A new Multi-GAS system for continuous monitoring of CO2/CH4 ratios at active volcanoes. Journal of Volcanology and Geothermal Research 426, 107533.

Waelkens, C.M., Stix, J., Eves, E., Gonzalez, C., Martineau, D., 2022. H2O and CO2 evolution in the Bandelier Tuff sequence reveals multiple and discrete magma replenishments. Contributions to Mineralogy and Petrology 177(1), 1-23.

Mick, E., Stix, J., de Moor, J.M., Avard, G., 2021. Hydrothermal alteration and sealing at Turrialba volcano, Costa Rica, as a mechanism for phreatic eruption triggering. Journal of Volcanology and Geothermal Research 416, 107297.

Rooyakkers, S.M., Stix, J., Berlo, K., Petrelli, M., Hampton, R.L., Barker, S.J., Morgavi, D., 2021. The Origin of Rhyolitic Magmas at Krafla Central Volcano (Iceland). Journal of Petrology 62(8), egab064.

Rooyakkers, S.M., Stix, J., Berlo, K., Petrelli, M., Sigmundsson, F., 2021. Eruption risks from covert silicic magma bodies. Geology 49(8), 921-925.

Waelkens, C.M., Stix, J., Monteleone, B., Burckel, P., 2021. Efficient release of bromine by super-eruptions. Geology 49(12), 1416-1420.

Wiebe, R.A., Kolzenburg, S., Rooyakkers, S.M., Stix, J., 2021. Plutonic record of a caldera-forming silicic eruption: The shatter zone of the Cadillac Mountain granite, coastal Maine. Geosphere 17(1), 1–22.

Rooyakkers, S.M., Stix, J., Berlo, K., Barker, S.J., 2020. Emplacement of unusual rhyolitic to basaltic ignimbrites during collapse of a basalt-dominated caldera: The Halarauður eruption, Krafla (Iceland). Bulletin of the Geological Society of America 132(9-10), 1881-1902.

Rüdiger, J., Gutmann, A., Bobrowski, N., Liotta, M., de Moor, J.M., Sander, R., Dinger, F., Tirpitz, J.L., Ibarra, M., Saballos, A., Martínez, M., Mendoza, E., Ferrufino, A., Stix, J. et al., 2021. Halogen activation in the plume of Masaya volcano: field observations and box model investigations. Atmospheric Chemistry and Physics 21(5), 3371-3393.

Beard, C.D., van Hinsberg, V.J., Stix, J., Wilke, M., 2019. Clinopyroxene/melt trace element partitioning in sodic alkaline magmas. Journal of Petrology 60(9), 1797-1823.

D’Arcy, F., Boucher, É., De Moor, J.M., Hélie, J.F., Piggott, R., Stix, J., 2019. Carbon and sulfur isotopes in tree rings as a proxy for volcanic degassing. Geology 47(9), 825-828.

de Moor, J.M., Stix, J., Avard, G., Muller, C., Corrales, E., Diaz, J.A., Alan, A., Brenes, J., Pacheco, J., Aiuppa, A., Fischer, T.P., 2019. Insights on hydrothermal‐magmatic interactions and eruptive processes at Poás volcano (Costa Rica) from high‐frequency gas monitoring and drone measurements. Geophysical Research Letters 46(3), 1293-1302.

Beaudry, P., Longpré, M.A., Economos, R., Wing, B.A., Bui, T.H., Stix, J., 2018. Degassing-induced fractionation of multiple sulphur isotopes unveils post-Archaean recycled oceanic crust signal in hotspot lava. Nature communications 9(1), 5093.

Kennedy, B.M., Holohan, E.P., Stix, J., Gravley, D.M., Davidson, J., Cole, J.W., 2018. Magma plumbing beneath collapse caldera volcanic systems. Earth-Science Reviews 177, 404-424.

Stix, J., 2018. Understanding fast and slow unrest at volcanoes and implications for eruption forecasting. Frontiers in Earth Science 6, art. no. 56.

Stix, J., de Moor, J.M., 2018. Understanding and forecasting phreatic eruptions driven by magmatic degassing. Earth, Planets and Space 70 (1), art. no. 83. DOI: 10.1186/s40623-018-0855-z

Stix, J., de Moor, J.M., Rüdiger, J., Alan, A., Corrales, E., D'Arcy, F., Diaz, J.A., Liotta, M., 2018. Using Drones and Miniaturized Instrumentation to Study Degassing at Turrialba and Masaya Volcanoes, Central America. Journal of Geophysical Research: Solid Earth 123 (8), 6501-6520.

Bray, B., Stix, J., Cousens, B., 2017. Mafic replenishment of multiple felsic reservoirs at the Mono domes and Mono Lake islands, California. Bulletin of Volcanology 79 (7), art. no. 54.

Longpré, M.-A., Stix, J., Klügel, A., Shimizu, N., 2017. Mantle to surface degassing of carbon- and sulphur-rich alkaline magma at El Hierro, Canary Islands. Earth and Planetary Science Letters 460, 268-280.

Malowany, K.S., Stix, J., de Moor, J.M., Chu, K., Lacrampe-Couloume, G., Sherwood Lollar, B., 2017. Carbon isotope systematics of Turrialba volcano, Costa Rica, using a portable cavity ring-down spectrometer. Geochemistry, Geophysics, Geosystems 18 (7), 2769-2784.

Seropian, G. and Stix, J., 2017. Monitoring and forecasting fault development at actively forming calderas: An experimental study. Geology 46(1), 23-26.

Stix, J., Lucic, G., Malowany, K., 2017. Near real-time field measurements of d13C in CO2 from volcanoes. Bulletin of Volcanology79 (8), art. no. 62

Coumans, J.P., Stix, J., Clague, D.A., Minarik, W.G., Layne, G.D., 2016. Melt-rock interaction near the Moho: Evidence from crystal cargo in lavas from near-ridge seamounts. Geochimica et Cosmochimica Acta 191, 139-164.

Kennedy, B., Stix, J., Hon, K., Deering, C., Gelman, S., 2016. Magma storage, differentiation, and interaction at Lake City caldera, Colorado, USA. Geological Society of America Bulletin 128, 764-776.

Lucic, G., Berg, A.-S., Stix, J., 2016. Water-rich and volatile-undersaturated magmas at Hekla Evolcano, Iceland. Geochemistry, Geophysics, Geosystems 17 (8), 3111-3130.

Nadeau, O., Stix, J., Williams-Jones, A.E., 2016. Links between arc volcanoes and porphyry-epithermal ore deposits. Geology 44 (1) pp. 11-14.

Coumans, J.P., Stix, J., Clague, D.A., Minarik, W.G., 2015. The magmatic architecture of taney seamount-A, NE Pacific Ocean. Journal of Petrology 56 (6), 1037-1067. 

Klügel, A., Longpré, M.-A., García-Cañada, L., Stix, J., 2015. Deep intrusions, lateral magma transport and related uplift at ocean island volcanoes. Earth and Planetary Science Letters 431, art. no. 13483, 140-149.

Lucic, G., Stix, J., Wing, B., 2015. Structural controls on the emission of magmatic carbon dioxide gas, Long Valley Caldera, USA. Journal of Geophysical Research B: Solid Earth 120 (4), 2262-2278.

Malowany, K., Stix, J., Van Pelt, A., Lucic, G., 2015. H₂S interference on CO₂ isotopic measurements using a Picarro G1101-i cavity ring-down spectrometer. Atmospheric Measurement Techniques 8 (10), 4075-4082

Longpré, M.-.A, Klügel, A., Diehl, A., Stix, J. 2014, Mixing in mantle magma reservoirs prior to and during the 2011-2012 eruption at El Hierro, Canary Islands, Geology, vol. 42, no. 4, pp. 315-318.

Longpré, M.-A., Stix, J., Costa, F., Espinoza, E., Muñoz, A. 2014, Magmatic processes and associated timescales leading to the January 1835 eruption of Cosigüina Volcano, Nicaragua, Journal of Petrology, vol. 55, no. 6, pp. 1173-1201.

Lucic, G., Stix, J., Sherwood Lollar, B., Lacrampe-Couloume, G., Muñoz, A., Carcache, M.I. 2014, The degassing character of a young volcanic center: Cerro Negro, Nicaragua, Bulletin of Volcanology, vol. 76, no. 9, art. 850. 

Helo, C., Clague, D.A., Dingwell, D.B., Stix, J. 2013, High and highly variable cooling rates during pyroclastic eruptions on Axial Seamount, Juan de Fuca Ridge, Journal of Volcanology and Geothermal Research, vol. 253, pp. 54-64. 

Mann, C.P., Wallace, P.J., Stix, J. 2013, Phenocryst-hosted melt inclusions record stalling of magma during ascent in the conduit and upper magma reservoir prior to vulcanian explosions, Soufrière Hills volcano, Montserrat, West Indies, Bulletin of Volcanology, vol. 75, no. 2, pp. 1-16. 

Nadeau, O., Williams-Jones, A.E., Stix, J. 2013, Magmatic-hydrothermal evolution and devolatilization beneath Merapi volcano, Indonesia, Journal of Volcanology and Geothermal Research, vol. 261, pp. 50-68. 

Nadeau, O., Stix, J., Williams-Jones, A.E. 2013, The behavior of Cu, Zn and Pb during magmatic-hydrothermal activity at Merapi volcano, Indonesia, Chemical Geology, vol. 342, pp. 167-179.  

Wilcock, J., Goff, F., Minarik, W.G., Stix, J. 2013, Magmatic recharge during the formation and resurgence of thevalles caldera, new mexico, usa: Evidence from quartz compositional zoning and geothermometry, Journal of Petrology, vol. 54, no. 4, pp. 635-664. 

Girard, G., Stix, J. 2012. Future volcanism at yellowstone caldera: Insights from geochemistry of young volcanic units and monitoring of volcanic unrest. GSA Today, 22(9), 4-10. 

Berlo, K., Stix, J., Roggensack, K., Ghaleb, B., 2012. A tale of two magmas, Fuego, Guatemala, Bulletin of Volcanology, 74 (2), 377-390, doi 10.1007/s00445-011-0530-8.

Stix, J., Phillips, J.C., 2012. An analog investigation of magma fragmentation and degassing: Effects of pressure, volatile content, and decompression rate, Journal of Volcanology and Geothermal Research, 211-212(2), 12-23.

Helo, C., Longpré, M.-A., Shimizu, N., Clague, D.A., Stix, J., 2011. Explosive eruptions at mid-ocean ridges driven by CO 2-rich magmas, Nature Geoscience, 4(4), 260-263.

Girard, G., Stix, J., 2010. Rapid extraction of discrete magma batches from a large differentiating magma chamber: The Central Plateau Member rhyolites, Yellowstone caldera, Wyoming, Contributions to Mineralogy and Petrology, 160(3), 441-465.

Nadeau, O., Williams-Jones, A.E., Stix, J., 2010. Sulphide magma as a source of metals in arc-related magmatic hydrothermal ore fluids, Nature Geoscience, 3(7), 501-506.

Campbell, M.E., Hanson, J.B., Minarik, W.G., Stix, J., 2009. Thermal history of the bandelier magmatic system: Evidence for magmatic injection and recharge at 1.61 Ma as revealed by cathodoluminescence and titanium geothermometry, Journal of Geology, 117 (5), 469-485.

Girard G., J. Stix, 2009. Buoyant replenishment in silicic magma reservoirs: Experimental approach and implications for magma dynamics, crystal mush remobilization, and eruption, J. Geophys. Res., 114, B08203, doi:10.1029/2008JB005791.

Girard, G., Stix, J., 2009.  Magma Recharge and Crystal Mush Rejuvenation Associated with Early Post-collapse Upper Basin Member Rhyolites, Yellowstone Caldera, Wyoming, Journal of Petrology, 50(11), 2095-2125; doi:10.1093/petrology/egp070 .

Mueller, W.U., Stix, J., Corcoran, P.L., Daigneault, R., 2009. Subaqueous calderas in the Archean Abitibi greenstone belt: An overview and new ideas, Ore Geology Reviews, 35 (1), 4-46.

Kennedy, B.M., Mark Jellinek, A., Stix, J., 2008.Coupled caldera subsidence and stirring inferred from analogue models, Nature Geoscience, 1(6), 385-389.

Mueller, W.U., J. Stix, J.D.L. White, P.L. Corcoran, B. Lafrance, and R. Daigneault, 2008. Characterization of Archean subaqueous calderas in Canada: physical volcanology, carbonate-rich hydrothermal alteration and a new exploration model. In. J. Gottsmann and J. Martí (Editors), Caldera Volcanism. Elsevier, Developments in Volcanology, 10: 181-232.

Stix, J., Kobayashi, T., 2008. Magma dynamics and collapse mechanisms during four historic caldera-forming events, Journal of Geophysical Research B: Solid Earth, 113 (9), Article number B09205.

Stix, J., G. Williams-Jones, and C. Hickson, 2008. Applying the COSPEC at active volcanoes. In: Williams-Jones, G., J. Stix, and C.J. Hickson (Editors), The COSPEC cookbook: making SO2 gas measurements at active volcanoes. IAVCEI Methods in Volcanology, 1: 121-168.

Williams-Jones, G., J. Stix, and P.A. Nadeau, 2008. Using the COSPEC in the field. In: Williams-Jones, G., J. Stix, and C.J. Hickson (Editors), The COSPEC cookbook: making SO2 gas measurements at active volcanoes. IAVCEI Methods in Volcanology, 1: 63-120.

Kennedy, B., Stix, J., 2007. Magmatic processes associated with caldera collapse at Ossipee ring dyke, New Hampshire, Bulletin of the Geological Society of America, 119(1-2), 3-17. GEOTOP publication n° 2007-0020

Longpré, M.-A., Staudacher, T., Stix, J., 2007. The November 2002 eruption at Piton de la Fournaise volcano, La Réunion Island: Ground deformation, seismicity, and pit crater collapse, Bulletin of Volcanology, 69(5), 511-525. GEOTOP publication n° 2007-0021

Stix, J., 2007. Stability and instability of quiescently active volcanoes: the case of Masaya, Nicaragua, Geology, 35, 535-538. GEOTOP Publication n° 2007-0019.

Stix, J., 2005. Editorial, Bulletin of Volcanology, 68(1), 1-2. 

Dartevelle, S., Rose, W.I., Stix, J., Kelfoun, K., Vallance, J.W., 2004. Numerical modeling of geophysical granular flows: 2. Computer simulations of plinian clouds and pyroclastic flows and surges, Geochem. Geophys. Geosyst., 5(8), Q08004, DOI 10.1029/2003GC000637.

Kennedy, B., Stix J., Vallance, J.W., Lavallée, Y., Longpré, M.-A., 2004. Controls on caldera structure: results from analogue sandbox modeling, Geol. Soc. Am. Bull., 116, 515-524.

Lavallée, Y., Kennedy, B., Stix, J., Richer, M., Longpré, M.-A., 2004. Caldera subsidence in areas of variable topographic relief: results from analogue modelling, J. Volcanol. Geotherm. Res., 129, 219-236.

Mann, C.P., Stix J., Richer, M., Vallance, J.W., 2004. Subaqueous intracaldera volcanism, Ilopango caldera, El Salvador, Central America, Geol. Soc. Am. Spec. Pap., 375, 159-174.

Mueller, W., J. Stix, J.D.L. White, and G. Hudak, 2004. Archaean calderas. In: P.G. Eriksson, W. Altermann, D.R. Nelson, W.U. Mueller, and O. Catuneanu (Editors), The Precambrian Earth, Tempos and Events. Elsevier, Developments in Precambrian Geology, 12: 345-356.

Richer, M., Mann, C.P., Stix, J., 2004. Mafic magma injection triggering eruption at Ilopango caldera, El Salvador, Central America, Geol. Soc. Am. Spec. Pap., 375, 175-189.

Schatz, O.J., Dolejš, D., Stix, J., Williams-Jones, A.E., Layne, G.D., 2004. Partitioning of boron among melt, brine and vapor in the system haplogranite-H2O-NaCl at 800 °C and 100 MPa, Chemical Geology, 210(1-4), 135-147.

Stix,  J., 2004. Applying the COSPEC at active volcanoes, Geol. Surv. Can. Paper.

Williams-Jones, G., Stix J., 2004. COSPEC field measurements, Geol. Surv. Can. Paper.

Witter, J.B., Kress, V.C., Delmelle, P., Stix, J., 2004. Volatile degassing, petrology, and magma dynamics of the Villarrica lava lake, southern Chile, J. Volcanol. Geotherm. Res., 134, 303-337.

Kennedy, B., Stix, J., 2003. Igneous Rock Associations 1: Styles and mechanisms of caldera collapse,, Geoscience Canada, 30 (2), 59-72.

Kennedy, B., Stix, J., 2003. Igneous Rock Associations of Canada 2: Stages in the temporal evolution of calderas, Geoscience Canada, 30 (3) , 129-140.

Najman, Y., Garzanti, E., Pringle, M., Bickle, M., Stix, J., Khan, I., 2003. Early-middle Miocene paleodrainage and tectonics in the Pakistan Himalaya, Geol. Soc. Am. Bull., 115, 1265-1277.

Lewicki, J.L., Connor, C., St-Amand, K., Stix, J., Spinner, W., 2003. Self-potential, soil CO2 flux, and temperature on Masaya volcano, Nicaragua, Geophys. Res. Lett., 30(15), 1817, DOI 10.1029/2003GL017731.

Stix, J., Kennedy, B., Hannington, M., Gibson, H., Fiske, R., Mueller, W., Franklin, J. 2003. Caldera-forming processes and the origin of submarine volcanogenic massive sulfide deposits, Geology, 31, 375-378.

Stix, J., Layne, G.D., Williams, S.N., 2003. Mechanisms of degassing at Nevado del Ruiz volcano, Colombia, J. Geol. Soc. London, 160, 507-521.

Wardell, L., Delmelle, P., Fischer, T., Lewicki, J., Malavassi, E., Stix, J., Strauch, W., 2003. Volcanic gas workshop features state-of-the-art measurement techniques, EOS, Trans. Am. Geophys. Union, 84(47), 519-520.

Delmelle, P., Stix, J., Baxter, P.J., Garcia-Alvarez, J., Barquero, J., 2002. Atmospheric dispersion, environmental effects and potential health hazard associated with the low-altitude gas plume of Masaya volcano, Nicaragua, Bull. Volcanol., 64, 423-434.

Dartevelle, S., Ernst, G.G.J., Stix, J., Bernard, A., 2002. Origin of the Mount Pinatubo climactic eruption cloud: implications for volcanic hazards and atmospheric impacts, Geology, 30 (7) , 663-666.

Harvey, D.C., Gaonac’h, H., Lovejoy, S., Stix, J., Schertzer, D., 2002. Multifractal characterization of remotely sensed volcanic features: a case study from Kilauea volcano, Hawaii, Fractals, 10, 265-274.

Delmelle, P., Stix, J., Bourque, C. P.-A., Baxter, P.J., Garcia-Alvarez, J., Barquero, J., 2001. Dry deposition and heavy acid loading in the vicinity of Masaya volcano, a major sulfur and chlorine source in Nicaragua, Environ. Sci. & Technol., 35, 1289-1293.

Stix, J., 2001. Flow evolution of experimental gravity currents: implications for pyroclastic flows at volcanoes, J. Geology, 109, 381-398.

Williams-Jones, G., Stix, J., Heiligmann, M., Barquero, J., Fernandez, E., Gonzalez, E.D., 2001. A model of degassing and seismicity at Arenal volcano, Costa Rica, J. Volcanol. Geotherm. Res., 108, 121-139.

Ujike, O., Stix J., 2000. Geochemistry and origins of Ueno and On-take basaltic to andesitic rocks (<3 Ma) produced by distinct contributions of subduction components, central Japan,  J. Volcanol. Geotherm. Res., 95, 49-64. 

Williams-Jones, G., Stix, J., Heiligmann, M., Charland, A., Sherwood Lollar, B., Arner, N., Garzón, V. G., Barquero, J., Fernandez, E.,2000. A model of diffuse degassing at three subduction-related volcanoes, Bull. Volcanol., 62, 130-142.

Watson, I.M., Oppenheimer, C., Voight, B., Francis, P.W., Clarke, A., Stix, J., Miller, A., Pyle, D.M., Burton, M.R., Young, S.R., Norton, G., Loughlin, S., Darroux, B., MVO Staff, 2000. The relationship between degassing and ground deformation at Soufriere Hills volcano, Montserrat, J. Volcanol. Geotherm. Res., 98, 117-126.