@article{TEXTUAL,
      recid = {10455},
      author = {Gualda, Guilherme A. R. and Pamukcu, Ayla S. and Ghiorso,  Mark S. and Anderson Jr., Alfred T. and Sutton, Stephen R.  and Rivers, Mark L.},
      title = {Timescales of Quartz Crystallization and the Longevity of  the Bishop Giant Magma Body},
      journal = {PLOS ONE},
      address = {2012-05-30},
      number = {TEXTUAL},
      abstract = {&lt;p&gt;Supereruptions violently transfer huge amounts (100  s–1000 s km&lt;sup&gt;3&lt;/sup&gt;) of magma to the surface in a  matter of days and testify to the existence of giant pools  of magma at depth. The longevity of these giant magma  bodies is of significant scientific and societal interest.  Radiometric data on whole rocks, glasses, feldspar and  zircon crystals have been used to suggest that the Bishop  Tuff giant magma body, which erupted ∼760,000 years ago and  created the Long Valley caldera (California), was  long-lived (&gt;100,000 years) and evolved rather slowly. In  this work, we present four lines of evidence to constrain  the timescales of crystallization of the Bishop magma body:  (1) quartz residence times based on diffusional relaxation  of Ti profiles, (2) quartz residence times based on the  kinetics of faceting of melt inclusions, (3) quartz and  feldspar crystallization times derived using  quartz+feldspar crystal size distributions, and (4)  timescales of cooling and crystallization based on  thermodynamic and heat flow modeling. All of our estimates  suggest quartz crystallization on timescales of &lt;10,000  years, more typically within 500–3,000 years before  eruption. We conclude that large-volume, crystal-poor magma  bodies are ephemeral features that, once established,  evolve on millennial timescales. We also suggest that  zircon crystals, rather than recording the timescales of  crystallization of a large pool of crystal-poor magma,  record the extended periods of time necessary for  maturation of the crust and establishment of these giant  magma bodies.&lt;/p&gt;},
      url = {http://knowledge.uchicago.edu/record/10455},
}