J
James E. Gardner
Researcher at University of Texas at Austin
Publications - 120
Citations - 5124
James E. Gardner is an academic researcher from University of Texas at Austin. The author has contributed to research in topics: Magma & Explosive eruption. The author has an hindex of 39, co-authored 113 publications receiving 4611 citations. Previous affiliations of James E. Gardner include Brown University & University of Alaska Fairbanks.
Papers
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Comparison of microanalytical methods for estimating H2O contents of silicic volcanic glasses
TL;DR: In this article, three methods of estimating H20 contents of geologic glasses are compared: (1) ion microprobe analysis (secondary ion mass spectrometry), (2) Fourier-transform infrared spectroscopy (FTIR), and (3) electron micro-probe (EM) analysis using the Na decay-curve method.
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Experimental phase equilibria constraints on pre‐eruptive storage conditions of the Soufriere Hills magma
Jenni Barclay,Malcolm J. Rutherford,Michael R. Carroll,M. D. Murphy,Joseph D. Devine,James E. Gardner,R. S. J. Sparks +6 more
TL;DR: In this article, a powdery andesite erupted in 1996 at an fO 2 corresponding to ∼NNO+1 with P H 2 O and temperatures in the range 50 to 200 MPa and 800 to 940°C.
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Experimental constraints on degassing of magma: isothermal bubble growth during continuous decompression from high pressure
TL;DR: In this article, the authors investigated the ascent rates required to maintain bubble-melt equilibrium in high-silica rhyolitic melts at 200 MPa and 825°C, and decompressed to lower pressures at constant rates of 0.025, 0.25,0.5, and 1.0 MPa s−1.
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Fragmentation of magma during Plinian volcanic eruptions
TL;DR: In this paper, the authors show that the volume of vesicles (gas) to that of glass (liquid) in pumice clasts reflects the degassing and dynamic history experienced by a magma during an explosive eruption.
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Experimental constraints on pre-eruptive water contents and changing magma storage prior to explosive eruptions of Mount St Helens volcano
TL;DR: In this paper, phase assemblages and their compositions in these dacites provide information about the composition of the pre-eruptive melt, the phases in equilibrium with that melt and the magmatic temperature.