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Christy Till

Associate Professor and Associate Director for an Inclusive Community
Faculty w/Admin Appointment, TEMPE Campus, Mailcode 6004
Biography: 

Christy Till is a geologist who leads a multidisciplinary research program that studies the role of magma in the formation and evolution of planets, known as the EPIC lab. Her research and that of EPIC lab members includes determining the timescales and triggers for eruptions at active volcanoes in the US, growing minerals and magma in high pressure and temperature laboratory experiments, and studying likely compositions of magma and crusts on exoplanets. 

Dr. Till also has deep interests in working for equity & justice within academic science and improving science communication. Toward these aims she is currently the Associate Director for an Inclusive Community for the School of Earth & Space Exploration at ASU and previously served as Vice Chair of the Council and member of the Board of the Directors of the American Geophysical Union (2012-2014), the largest professional organization of earth and space scientists. 

Education: 
  • Ph.D. Geology/Geochemistry, Massachusetts Institute of Technology 2011
  • M.S. Geological Sciences, Univ. California, Santa Barbara 2005
  • B.S. Geological Sciences, Univ. California, Santa Barbara 2004
Research Interests: 

Christy Till is an igneous petrologist interested in the physical and chemical evolution of planetary interiors. Specifically her research interests are in the chemistry, conditions, and timescales of magma formation as pertain to the differentiation of Earth and other planets, as well as volcanic hazards. To investigate these topics she integrates a variety of techniques including fieldwork, high pressure and temperature piston-cylinder and multi-anvil experiments, elemental and isotopic geochemistry and geochronology (via electron probe, SIMS/SHRIMP, LA-ICPMS and NanoSIMS) and quantitative models.

Publications: 

28) ‡Iacovino, K., M. Guild, Till, C.B., 2020, Aqueous fluids are effective oxidizing agents of the mantle in subduction zones, Contributions to Mineralogy and Petrology, V. 175, no. 4, p. 1-21.

27) Grove, T.L., Till, C.B., 2019, H2O-rich mantle melting near the slab-wedge interface, Contributions to Mineralogy and Petrology, v. 174, no. 10 p. 80-102.
26) Till, C.B., Vazquez, J.A., Stelten, M., Shamloo, H., Shaffer, J., 2019, Co-existing Discrete Bodies of Rhyolite and Punctuated Volcanism Characterize Yellowstone’s Post-Lava Creek Tuff Caldera Evolution, Geochemistry, Geophysics, Geosystems, v.20, no. 8, p. 3861-3881. 
25) Brugman, K., Till, C.B., 2019, A Low-Aluminum Clinopyroxene-Liquid Geothermometer for High-Silica Magmatic Systems, American Mineralogist, v. 104, no. 7, p. 996-1004.

24) Shamloo, H., Till, C.B., 2019, Decadal Transition from Quiescence to Supereruption; Petrologic Investigation of the Lava Creek Tuff, Yellowstone Caldera, WY, Contributions to Mineralogy and Petrology, v.174, no. 32. 

23) Till, C.B., Kent, A., Abers, G., Janiszewski, H., Gaherty, J., Pitcher, B., 2019, The Causes of Spatiotemoporal Variations in Erupted Fluxes and Compositions Along a Volcanic Arc, Nature Communications, v. 10, no. 1350, p. 1-12 (Open Access). 
22) Edwards M.A., M.G. Jackson, A.R.C. Kylander-Clark, J. Harvey, G.A. Hagen-Peter, G.G.E. Seward, C.B. Till, J.V. Adams, J.M. Cottle, B.R. Hacker, F.J. Spera, 2019, Beyond EM2: extreme enriched and heterogeneous 87Sr/86Sr ratios recorded in magmatic plagioclase from the Samoan hotspot, Earth & Planetary Science Letters, v. 511, p. 190-201.

21) ‡Iacovino, K., Till, C.B., 2019, DensityX: A program for calculating the densities of hydrous magmatic liquids from 427-1627 °C and up to 30 kbar, Volcanica, vol. 2, no. 1, p.1-10. 
20) Cooper, K.M., Till, C.B., Kent, A.J.R., Costa, F., Rubin, A.E., Gravley, D., Deering, C., Cole, J., Bose, M., 2017, Response to “Cold Storage in a Heat Wave?”, Science (reply to comment), v. 358 (6370), p. 9145. 
19) **Rubin, A.E., Cooper, K.M., Till, C.B., Kent, A.J.R., Costa, F., Gravley, D., Deering, C., Cole, J., Bose, M., 2017, Rapid cooling and cold storage in a silicic magma reservoir recorded in individual crystals, Science, v. 356, iss. 6343, p. 1154-1156, doi:10.1126/science.aam8720. 
18) Till, C.B., 2017, A Review & Update of Mantle Thermobarometry for Primitive Arc Magmas (invited paper), American Mineralogist, v. 102, p. 931-947, dx.doi.org/10.2138/am-2017-5783. 
17) Till, C.B., Vazquez, J.A, Boyce, J.W., 2015, Months between rejuvenation and volcanic eruption at Yellowstone caldera, Wyoming, Geology, v.43, no. 8., p. 695-698, doi:10.1130/G36862.1. 
16) Grove, T.L., Till, C.B., 2015, Melting of the Earth's Upper Mantle, Encyclopedia of Volcanoes, Second Edition, Haraldur Sigurdsson, editor, p. 35-47. 

15) Grove, T.L., Holbig, E.S., Barr, J.A., Till, C.B., Krawczynski, M.J., 2013, Melting of compositionally variable upper mantle in the garnet stability field: Distinguishing melts of lherzolite and pyroxenite source regions, Contributions to Mineralogy and Petrology, vol. 166, no. 3, p.887-910, doi: 10.1007/s00410-013-0899-9.
14) Till, C.B., Grove, T.L., Carlson, R.W., Donnelly-Nolan, J.M., Fouch, M.J., Wagner, L.S., Hart, W.K., 2013, Depths and Temperatures of Asthenopheric Melting and the Lithosphere-Asthenosphere Boundary in the southern Cascades Arc and Back-Arc, Geochemistry, Geophysics, Geosystems, doi:10.1002/ggge.20070.  
13) Till, C.B., Grove, T.L., Withers, T., 2012, Reply to ‘Comment on “The beginnings of hydrous mantle wedge melting” by Till et al.,’ by Stalder, Contributions to Mineralogy and Petrology, v. 164, no. 6, p.1073-1076, doi: 10.1007/s00410-012-0796-z.
12) Till, C.B., Grove, T.L., Withers, T., 2012, Reply to ‘Comment on “The beginnings of hydrous mantle wedge melting” by Till et al.,’ by Green, Rosethal and Kovacs, Contributions to Mineralogy and Petrology, v. 164, no. 6, p.1083-1085, doi: 10.1007/s00410-012-0803-z.
11) Till, C.B., Grove, T.L., and Krawczynski, M.J., 2012, A melting model for variably depleted and enriched lherzolite in the plagioclase and spinel stability fields, Journal of Geophysical Research (Solid Earth), v. 117, no. B06206, doi: 10.1029/2011JB009044.
10) Long, M.D., Till, C.B., Druken, K.A., Carlson, R.W., Wagner, L.S., Fouch, M.J., James, D.E., Grove, T.L., Schmerr, N., Kincaid, C., 2012, Mantle dynamics beneath the Pacific Northwest and the generation of voluminous back-arc volcanism, Geochemistry, Geophysics, Geosystems, v. 13, no. 1, Q0AN01, doi: 10.1029/2012GC004189.
9) Grove, T.L., Till, C.B., Krawczynski, M.J., 2012, The Role of H2O in Subduction Zone Magmatism, Annual Review of Earth and Planetary Sciences, v. 40, p. 413-439, doi:10.1146/annurev-earth-042711-105310.
8) Till, C.B., Grove, T.L., Withers, T., 2012, The Beginnings of Hydrous Mantle Wedge Melting, Contributions to Mineralogy and Petrology, v. 163, p. 669-688, doi: 10.1007/s00410-011-0692-6.
7) Till, C.B., Elkins-Tanton, L.T. and Fisher, K.M., 2010, Low Extent Melts at the Lithosphere-Asthenosphere Boundary, Geochemistry, Geophysics, Geosystems, v. 11, no. 10, doi:10.1029/2010GC003234.
6) Grove, T.L., Till, C.B., Lev, E., Chatterjee, N. and Medard, E., 2010, Reply to Global Systematics of Arc Volcano Position, Nature, vol. 468, p. E6-E8.
5) Grove, T.L., Till, C.B., Lev, E., Chatterjee, N. and Medard, E., 2009, Kinematic variables and water transport control the formation and location of arc volcanoes; Nature, vol. 459, p.694-697.
4) Till, C.B., Gans, P.B., and Spera, F.J., 2009, Perils of petrotectonic modeling: A view from southern Sonora Mexico; J. Volcanology & Geothermal Research, vol. 186, p.160-168.
3) Mariner, R.H., Minor, S.A., King, A.P., Boles, J.R., Kellog, K.S., Evans, W.C., Landis, G.A., Hunt, A.G. and Till, C.B., 2008, A landslide in Tertiary marine shale with superheated fumaroles, Coast Ranges, California, Geology, vol. 36, no. 12, p.959-962.
2) Hirschmann, M.M., Ghiorso, M.S., Davis, F.A., Gordon, S.M., Mukherjee, S., Grove, T.L., Krawczyniski, M., Medard, E., and Till, C.B., 2008, Library of Experimental Phase Relations (LEPR): A database and web portal for experimental magamatic phase equilibria data; Geochemistry, Geophysics, Geosystems, vol. 9, no. Q03011.
1) Spera, F.J., Bohrson, W.A., Till, C.B., and Ghiorso, M.S., 2007, Partitioning of trace elements among coexisting crystals, melt and supercritical fluid during isobaric crystallization and melting; American Mineralogist, vol. 92, p.1881-1898.

 

Research Activity: 
Fall 2020
Course NumberCourse Title
SES 494Special Topics
SES 499Individualized Instruction
SES 592Research
SES 598Special Topics
SES 599Thesis
SES 692Research
SES 792Research
SES 799Dissertation
Summer 2020
Course NumberCourse Title
SES 592Research
SES 692Research
SES 792Research
SES 799Dissertation
Spring 2020
Course NumberCourse Title
SES 494Special Topics
SES 499Individualized Instruction
SES 598Special Topics
SES 599Thesis
SES 692Research
SES 792Research
SES 799Dissertation
Fall 2019
Course NumberCourse Title
GLG 424Petrology
SES 499Individualized Instruction
SES 592Research
SES 599Thesis
SES 692Research
SES 792Research
SES 799Dissertation
Summer 2019
Course NumberCourse Title
SES 592Research
Spring 2019
Course NumberCourse Title
SES 494Special Topics
SES 499Individualized Instruction
SES 592Research
SES 598Special Topics
SES 599Thesis
SES 692Research
SES 792Research
SES 799Dissertation
Fall 2018
Course NumberCourse Title
GLG 424Petrology
SES 592Research
SES 692Research
SES 792Research
SES 799Dissertation
Summer 2018
Course NumberCourse Title
SES 592Research
SES 692Research
SES 792Research
SES 799Dissertation
Spring 2018
Course NumberCourse Title
SES 499Individualized Instruction
SES 592Research
SES 599Thesis
SES 692Research
SES 792Research
SES 799Dissertation
Fall 2017
Course NumberCourse Title
GLG 424Petrology
GLG 499Individualized Instruction
SES 692Research
SES 792Research
SES 799Dissertation
Summer 2017
Course NumberCourse Title
SES 692Research
SES 792Research
SES 799Dissertation
Spring 2017
Course NumberCourse Title
SES 494Special Topics
GLG 499Individualized Instruction
GLG 592Research
AST 592Research
SES 598Special Topics
GLG 599Thesis
SES 692Research
GLG 692Research
AST 692Research
SES 792Research
GLG 792Research
AST 792Research
SES 799Dissertation
GLG 799Dissertation
AST 799Dissertation
Fall 2016
Course NumberCourse Title
GLG 424Petrology
GLG 499Individualized Instruction
GLG 592Research
GLG 599Thesis
AST 692Research
SES 692Research
GLG 692Research
SES 792Research
GLG 792Research
AST 792Research
SES 799Dissertation
AST 799Dissertation
GLG 799Dissertation
Summer 2016
Course NumberCourse Title
GLG 592Research
AST 692Research
GLG 692Research
GLG 799Dissertation
Spring 2016
Course NumberCourse Title
GLG 101Intro to Geology I (Physical)
AST 592Research
GLG 592Research
GLG 599Thesis
GLG 692Research
AST 692Research
GLG 792Research
AST 792Research
GLG 799Dissertation
AST 799Dissertation