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| Titel |
A magma reservoir prior to a Yellowstone supereruption: Constraints from the Mount Jackson Rhyolite and the Island Park dome series (Wyoming, USA) |
| VerfasserIn |
Juliana Troch, Ben S. Ellis, Marcel Guillong, Darren F. Mark, Ilya N. Bindeman, Olivier Bachmann |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088223
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| Publikation (Nr.) |
 EGU/EGU2014-2310.pdf |
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| Zusammenfassung |
| The Yellowstone volcanic field is one of the largest and best-studied centers of rhyolitic
volcanism on Earth. The Mount Jackson rhyolite (MJR) and the Island Park dome (IPD)
series represent a less extensively studied collection of rhyolitic lavas which were erupted in
the 600,000 years following the second caldera-forming eruption of Yellowstone, the 280
km3 Mesa Falls Tuff (MFT, ~1.29 Ma). We present here an approach of detailed major and
trace element compositional analyses of bulk and mineral chemistry coupled with
high-resolution 40Ar/39Ar-dating to examine the evolution within the magmatic system that
culminated in Yellowstone’s last ‘super‘ eruption, the 1,000 km3 Lava Creek Tuff (~0.64
Ma).
The studied lavas are high-silica rhyolites and contain sanidine (~15o), quartz (~10o)
and minor plagioclase, plus variable amounts of mafic minerals ( |
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