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Christy B. Till
Arizona State University
52Publications
14H-index
831Citations
Publications 52
Newest
Published on Jul 11, 2019in Geochemistry Geophysics Geosystems 2.95
Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University),
Jorge A. Vazquez13
Estimated H-index: 13
(USGS: United States Geological Survey)
+ 2 AuthorsJamie S. Shaffer (NMSU: New Mexico State University)
Published on Jul 1, 2019in American Mineralogist 2.63
Karalee K. Brugman1
Estimated H-index: 1
(ASU: Arizona State University),
Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University)
Published on Apr 1, 2019in Earth and Planetary Science Letters 4.64
M.A. Edwards (UCSB: University of California, Santa Barbara), Matthew G. Jackson27
Estimated H-index: 27
(UCSB: University of California, Santa Barbara)
+ 8 AuthorsB. R. Hacker4
Estimated H-index: 4
(UCSB: University of California, Santa Barbara)
Abstract We report the major-element, trace-element, and 87 Sr/ 86 Sr compositions of six plagioclase crystals from two Samoan lavas with extreme EM2 isotopic compositions (ALIA-115-18 with whole-rock 87 Sr/ 86 Sr of 0.718592, and ALIA-115-21 with whole-rock 87 Sr/ 86 Sr of 0.720469). We employed laser-ablation split-stream mass spectrometry (LASS) to simultaneously measure 87 Sr/ 86 Sr ratios, major-element concentrations, and trace-element concentrations in the same plagioclase crystal volume....
Published on Apr 1, 2019in Contributions to Mineralogy and Petrology 3.23
Hannah I. Shamloo (ASU: Arizona State University), Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University)
The magmatic processes responsible for triggering nature’s most destructive eruptions and their associated timescales remain poorly understood. Yellowstone Caldera is a large silicic volcanic system that has had three supereruptions in its 2.1-Ma history, the most recent of which produced the Lava Creek Tuff (LCT) ca. 631 ka. Here we present a petrologic study of the phenocrysts, specifically feldspar and quartz, in LCT ash in order to investigate the timing and potential trigger leading to the ...
Published on Jan 1, 2019
Adam J. R. Kent35
Estimated H-index: 35
,
Christy B. Till14
Estimated H-index: 14
,
Kari M. Cooper24
Estimated H-index: 24
Published on Apr 1, 2018in Nature Geoscience 14.48
Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University),
M. E. Pritchard28
Estimated H-index: 28
(Cornell University)
+ 2 AuthorsJuliet Ryan-Davis1
Estimated H-index: 1
(USGS: United States Geological Survey)
Multi-disciplinary analyses of Earth’s most destructive volcanic systems show that continuous monitoring and an understanding of each volcano’s quirks, rather than a single unified model, are key to generating accurate hazard assessments.
Published on Jan 8, 2018
Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University)
Published on Jan 1, 2018
Kayla Iacovino4
Estimated H-index: 4
(ASU: Arizona State University),
Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University)
Here we present a standalone program, DensityX, to calculate the densities of hydrous silicate melts (1,000s of samples in a single model run) given pressures, temperatures, and major oxide compositions in wt% in the 10-component system SiO2-TiO2-Al2O3-Fe2O3-FeO-MgO-CaO-Na2O-K2O-H2O. Here we use DensityX to analyze over 3,000 melt inclusions over a wide compositional range to visualize the distribution of natural silicate liquid densities in the Earth’s crust. The program is open-source, written...
Published on Dec 22, 2017in Science 41.04
Kari M. Cooper24
Estimated H-index: 24
(UC Davis: University of California, Davis),
Christy B. Till14
Estimated H-index: 14
(ASU: Arizona State University)
+ 6 AuthorsMaitrayee Bose7
Estimated H-index: 7
(ASU: Arizona State University)
In a recent paper, we used Li concentration profiles and U-Th ages to constrain the thermal conditions of magma storage. Wilson and co-authors argue that the data instead reflect control of Li behavior by charge balance during partitioning and not by experimentally determined diffusion rates. Their arguments are based on (i) a coupled diffusion mechanism for Li, which has been postulated but has not been documented to occur, and (ii) poorly constrained zircon growth rates combined with the assum...
Published on Jun 16, 2017in Science 41.04
Allison Rubin3
Estimated H-index: 3
(UC Davis: University of California, Davis),
Kari M. Cooper24
Estimated H-index: 24
(UC Davis: University of California, Davis)
+ 6 AuthorsJ. W. Cole36
Estimated H-index: 36
(Cant.: University of Canterbury)
Silicic volcanic eruptions pose considerable hazards, yet the processes leading to these eruptions remain poorly known. A missing link is knowledge of the thermal history of magma feeding such eruptions, which largely controls crystallinity and therefore eruptability. We have determined the thermal history of individual zircon crystals from an eruption of the Taupo Volcanic Zone, New Zealand. Results show that although zircons resided in the magmatic system for 10 3 to 10 5 years, they experienc...
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