Note: Links are to PDFs except as indicated.

Magma crystallization: experimental studies

Mollo, S. and Hammer, JE. (2017) Dynamic crystallization in magmas. EMU Notes in Mineralogy. 16, 373-418.

Brugger, CR and Hammer, JE. (2015) Prevalence of growth twins among anhedral plagioclase microlites. Am. Mineral. 100, 385-395.

Shea, T. and Hammer, JE. (2013) Kinetics of cooling- and decompression-induced crystallization in hydrous mafic-intermediate magmas. J Volcanol.Geotherm. Res. 260, 127-145.

Shea, T. and Hammer, JE. (2013) Oxidation in CSPV experiments involving H2O-bearing mafic magmas: Quantification and mitigation. Am. Mineral. 98, 1285-1296.

Brugger, CR, Hammer, JE. (2010) Crystallization kinetics in continuous decompression experiments; implications for interpreting natural magma ascent processes. J. Petrology, 51, 1941-1965.

Brugger, CR, Hammer, JE. (2010) Crystal size distribution analysis of plagioclase in experimentally decompressed hydrous rhyodacite magma. Earth Planet. Sci. Lett. 300, 246-254.

Hammer, JE (2009) Capturing crystal growth, Geology 37, 1055-1056, doi:10.1130/focus112009.1

Hammer, JE (2008; web site) Experimental Studies of the Kinetics and Energetics of Magma Crystallization. Reviews in Mineralogy and Petrology 69. 9-59.

Hammer, JE (2006) Influence of fO2 and cooling rate on the kinetics and energetics of Fe-rich basalt crystallization. Earth Planet. Sci. Lett. 10.1016/j.epsl.2006.04.022.

Hammer, JE (2004) Crystal nucleation theory applied to hydrous magma. Am. Mineral. 89: 1673-1679.

Hammer, JE, MJ Rutherford, and W Hildreth (2002) Magma storage prior to the 1912 eruption at Novarupta, Alaska. Contrib. Mineral. Petrol.144: 144-162.

Hammer, JE, and Rutherford, MJ (2002) An experimental study of decompression-induced crystallization in silicic melt. J. Geophys. Res. 107(B1), 8-1 - 8-24.

Hammer, JE, Manga, M, Cashman, KV (1998) Non-equilibrium and unsteady fluid degassing during slow decompression. Geophys Res Lett. 25: 4565-4568.

Textural and compositional analysis of volcanic products

Welsch, B., Hammer, J., Baronnet, A., Jacob, S., Hellebrand, E., and Sinton, J. (2016) Clinopyroxene in postshield Haleakala ankaramite: 2. Texture, compositional zoning and supersaturation in the magma. Contrib. Mineral. Petrol. 171, 6, DOI 10.1007/s00410-015-1213-9. Supplement1. Supplement2.

Hammer, J., Jacob, S., Welsch, B., Hellebrand, E., and Sinton, J. (2016) Clinopyroxene in postshield Haleakala ankaramite: 1. Efficacy of thermobarometry. Contrib. Mineral. Petrol. 171, 7, DOI 10.1007/s00410-015-1212-x. Supplement1. Supplement2. Supplement3. Supplement4. Supplement5. Supplement6. Supplement7.

Shea T, Lynn, K.J., Garcia, M.O., (2015) Cracking the olivine zoning code: Distinguishing between crystal growth and diffusion. Geology 43:935-938.

Giachetti T, Gonnermann H, Gardner, J, Shea T, Gouldstone A. (2015) Discriminating secondary from magmatic water in rhyolitic matrix-glass of volcanic pyroclastes using thermogravimetric analysis. Geochim. Cosmochim. Acta. 148:457-476.

Shea, T., Costa, F., Krimer, D., Hammer, JE. (2015) Accuracy of timescales retrieved from diffusion modeling in olivine: A 3D perspective. Am. Mineral. 100, 2026-2042.

Shea T, Gurioli L, Hellebrand E, Tuffen, H, (2014) Conduit to localized scale degassing during Plinian eruptions: insights from major element and volatile (Cl and H2O) analyses within AD79 Vesuvius pumice J. Petrol. 55:315-344.

Welsch, BT, Hammer, JE and Hellebrand, E. (2014) Phosphorus zoning reveals dendritic architecture of olivine. Geology doi: 10.1130/G35691.1.

Shea, T., Hammer, JE, First, E. (2013) Magma balloons or bombs? Nature Geo. 6, 802-803.

Stovall, WK, Houghton, BF, Hammer, JE, Fagents, SA, Swanson, DA (2012) Vesiculation of high fountaining Hawaiian eruptions: episodes 15 and 16 of 1959 Kilauea Iki. Bull. Volcanol. 74, 441-455.

Neill, OK, Hammer, JE, Izbekov, PE, Belousova, MG, Belousov, AB, Clarke, AB, Voight, B. (2010) Influence of pre-eruptive degassing and crystallization on the juvenile products of laterally directed volcanic explosions. J. Volcanol. Geotherm. Res. 198, 264-274.

Shea, T., Gurioli, L., Larsen, J.F., Houghton, B.F., Hammer, J.E., Cashman, K.V (2010) Linking experimental and natural vesicle textures in Vesuvius 79AD white pumice. J. Volcanol. Geotherm. Res., 192, 1-2, 69-84.

Hammer, JE, Sharp, TG, and Wessel, P. (2010) Heterogeneous nucleation and epitaxial crystal growth of magmatic minerals. Geology 38, 367-370.

Shea, T., Houghton, B.F., Gurioli, L., Cashman, K.V., Hammer, J.E., Hobden, B.V. (2010) Textural analyses of vesicles in volcanic rocks: An integrated methodology. J. Volcanol. Geothermal Research 190, 271-289.

Houghton, BF, Carey, RJ, Cashman, KV, Wilson, CJN, Hobden, BJ, and Hammer, JE. (2010) Diverse patterns of ascent, degassing, and eruption of rhyolite magma during the 1.8 ka Taupo eruption, New Zealand: Evidence from clast vesicularity. J. Volcanol. Geotherm. Res. 195, 31-47.

Shea, T, Larsen JF, Gurioli L, Hammer JE, Houghton BF, Cioni R. (2009) Leucite crystals: surviving witnesses of magmatic processes preceding the 79AD eruption at Vesuvius, Italy. Earth and Planetary Science Letters, 281, 88-98.

Vazquez, JA, Shamberger, PJ, and Hammer, JE. (2007) Plutonic xenoliths reveal timing of magma evolution at Hualalai and Mauna Kea, Hawaii. Geology. 35. 695-698

McCanta, MC, Rutherford, MJ, and Hammer, JE (2007) Pre-eruptive and syn-eruptive conditions in the Black Butte, California dacite: Insight into crystallization kinetics in a simplified silicic system. J Volcanol. Geotherm. Res. 160: 263-284.

Shamberger, PJ and Hammer, JE (2006) Leucocratic and Gabbroic Xenoliths from Hualalai Volcano, Hawai‘i. J. Petrology 47: 1785-1808.

Hammer, JE, M Coombs, PJ Shamberger, J Kimura (2006) Submarine sliver in North Kona: A window into the early magmatic and growth history of Hualalai Volcano, Hawaii. J. Volcanol. Geotherm. Res. 151, 157-188.

Hammer, JE (2006) Interpreting Inclusive Evidence. Nature 439: 26-27.

Hammer, JE and Rutherford, MJ (2003) (and correction) Petrologic Indicators of pre-eruption magma dynamics. Geology 31: 79-82.

Hammer, JE, Cashman, KV, Voight, B. (2000) Magmatic processes revealed by textural and compositional trends in Merapi dome lavas. J. Volcanol. Geotherm. Res. 100: 165-192.

Hammer, JE, Cashman, KV, Hoblitt, R.P., Newman, S. (1999) Degassing and microlite crystallization during pre-climactic events of the 1991 eruption of Mt. Pinatubo, Philippines Bull Volcanol. 60: 355-380.

Physical Volcanology

Shea T, Gurioli L, Houghton, BF, Cioni, R, Cashman KV (2011) Column collapse and generation of pyroclastic density currents during the AD 79 eruption of Vesuvius: the role of pyroclast density. Geologyy 39, 695-698.

Shea T, v. Wyk de Vries, B. (2010) Collapsing volcanoes: the sleeping giants’ threat. Geology Today 26, 2, 72-77.

Shea T, van Wyk de Vries B, Pilato M. (2008) Emplacement mechanisms of contrasting debris avalanches at Volcan Mombacho (Nicaragua), provided by structural and facies analysis. Bull. Volcanol. 70, 899-921.

Shea T, v. Wyk de Vries, B. (2008) Structural analysis and analogue modelling of the kinematics and dynamics of large-scale rockslide-avalanches. Geosphere 4, 657-686.

Mars petrology and rock magnetism

First. E., and Hammer, J. (2016) Igneous cooling history of oliving-phyric shergottite Yamato 980459 constrained by dynamic crystallization experiments. Meteoritics. Planet. Sci. 1-23, doi: 10.1111/maps.12659.

Brachfeld, S., Shah, D., First, E., Hammer, JE, and Bowles, J. (2015) Influence of redox conditions on the intensity of Mars crustal magnetic anomalies. Meteoritics. Planet. Sci. 50, 1703-1717.

Brachfeld, S, Cuomo, D, Tatsumi-Petrochilos, L, Bowles, J, Shah, D, and Hammer, J. (2014) Contribution of Multidomain Titanomagentite to the Intensity and Stability of Mars Crustal Magnetic Anomalies. Geophys. Res. Lett. 41, 7997–8005, doi:10.1002/ 2014GL062032.

Zinin, P, Tatsumi-Petrochilos, L, Bonal, L, Acosta, T, Hammer, J, Gilder, S, Fuller, M (2011) Raman spectroscopy of titanomagnetites: calibration of the intensity of Raman peaks as a sensitive indicator for their Ti content. American Mineralogist 96, 1537-1546.

Bowles, JA, Tatsumi-Petrochilos, L, Hammer, JE, Brachfeld, SA. (2012) Multi-component cubic oxide exsolution in synthetic basalts: Temperature dependence and implications for magnetic properties. Journal of Geophysical Research — Solid Earth 114, E10003, doi:10.1029/2011JB008867.

Bowles, JA, Hammer, JE, Brachfeld, SA. (2009) Magnetic and petrologic characterization of synthetic Martian basalts and implications for the surface magnetization of Mars. Journal of Geophysical Research — Planets 114, E10003, doi:10.1029/2009JE003378.

Hammer, JE (2009) Application of a textural geospeedometer to late-stage magmatic history of MIL03346. Meteoritics and Planetary Science 44. 141-154

Brachfeld, SA and Hammer, JE (2006) Rock-magnetic and remanence properties of synthetic Fe-rich basalts: Implications for Mars crustal anomalies. Earth Planet. Sci. Lett. doi:10.1016/j.epsl.2006.04.015


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