STIX John
 |
Earth & Planetary Sciences john.stix@mcgill.ca |
Ph.D., Toronto, Canada (1989)
Department of Earth and Planetary Sciences, McGill University
Publications
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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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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 . pdf
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. pdf
Kennedy, B.M., Mark Jellinek, A., Stix, J., 2008.Coupled caldera subsidence and stirring inferred from analogue models, Nature Geoscience, 1(6), 385-389. pdf
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. pdf
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 pdf
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 pdf
Stix, J., 2007. Stability and instability of quiescently active volcanoes: the case of Masaya, Nicaragua, Geology, 35, 535-538. GEOTOP Publication n° 2007-0019. pdf
Stix, J., 2005. Editorial, Bulletin of Volcanology, 68(1), 1-2. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
Kennedy, B., Stix, J., 2003. Igneous Rock Associations 1: Styles and mechanisms of caldera collapse,, Geoscience Canada, 30 (2), 59-72. pdf
Kennedy, B., Stix, J., 2003. Igneous Rock Associations of Canada 2: Stages in the temporal evolution of calderas, Geoscience Canada, 30 (3) , 129-140. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
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. pdf
Stix, J., 2001. Flow evolution of experimental gravity currents: implications for pyroclastic flows at volcanoes, J. Geology, 109, 381-398. pdf
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. pdf
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. pdf
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. pdf
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. pdf
Thèmes de recherche
Mots clé: volcanologie, pétrologie ignée
I study active volcano systems. My principal research philosophy is to address important problems in volcanology by applying a multi-disciplinary and integrated approach. This approach has worked very successfully. Some examples of my approach include the role of calderas in certain types of ore deposits, the relationship of degassing to other geophysical parameters of volcano unrest, and the role played by volcanism in terms of human health. During the past five years, my group has tackled the important problem of caldera evolution and caldera structure. We have been employing a combination of field and experimental techniques to elucidate the subsurface structure of calderas. By examining partly eroded calderas in the field as well as surface sections and cross sections of sandbox experiments, we have been able to gain insight into the diversity of structures formed during caldera development.
The physical processes which occur during degassing and within the conduit system of a volcano are important for eruption style and periodicity, as well as for changing pressure conditions in the magma conduit-reservoir system. I have examined various problems such as the role of diffuse degassing and passive degassing at the surface and within the conduit system itself. These studies typically integrate petrology, textural analysis of rocks, and gas remote sensing.
An important development in my research during the last five years has been the inclusion of experimental approaches and methods to help solve the problems I am studying. Examples include experimental density currents as an analogue for pyroclastic flows, sandbox experiments to model caldera subsidence, and piston-cylinder experiments to investigate boron behavior in vapor-rich and liquid-rich fluids. This experimental approach has been particularly fruitful and gratifying to me, and I expect to greatly expand this aspect over the next five years.
Étudiants
Coumans, Jason: M.Sc. in Earth and Planetary sciences, McGill University
Sujet de recherche: Volcanologic evolution of the Taney Seamounts, Pacific Ocean
Helo, Christoph: Ph.D. in Earth and Planetary sciences, McGill University
Sujet de recherche: Subaqueous volcanism, Axial volcano, Juan de Fuca ridge, Pacific Ocean
Longpré, Marc-Antoine: Stagiaire Postdoctoral, McGill University
Sujet de recherche: Volcanologie et pétrologie des volcans d'Amérique Centrale
Lucic, Grégor: M.Sc. in Earth and Planetary sciences, McGill University
Sujet de recherche: Carbon isotopic signatures of degassing volcanoes
Nadeau, Olivier: Ph.D. in Earth and Planetary sciences, McGill University
Sujet de recherche: The study of petrologic evolution and magmatic-hydrothermal thansitions at Merapi volcano Indonesia
Direction: Anthony E. Williams-Jones, Department of Earth and Planetary Sciences, McGill University
