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dc.contributor.author
Monnereau, L.R.
dc.contributor.author
Ellis, Ben S.
dc.contributor.author
Szymanowski, Dawid
dc.contributor.author
Bachmann, Olivier
dc.contributor.author
Guillong, Marcel
dc.date.accessioned
2021-04-13T11:57:02Z
dc.date.available
2021-04-11T02:56:36Z
dc.date.available
2021-04-13T11:57:02Z
dc.date.issued
2021
dc.identifier.issn
0258-8900
dc.identifier.issn
1432-0819
dc.identifier.other
10.1007/s00445-021-01448-1
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/478124
dc.identifier.doi
10.3929/ethz-b-000478124
dc.description.abstract
Dense, glassy pyroclasts found in products of explosive eruptions are commonly employed to investigate volcanic conduit processes through measurement of their volatile inventories. This approach rests upon the tacit assumption that the obsidian clasts are juvenile, that is, genetically related to the erupting magma. Pyroclastic deposits within the Yellowstone-Snake River Plain province almost without exception contain dense, glassy clasts, previously interpreted as hyaloclastite, while other lithologies, including crystallised rhyolite, are extremely rare. We investigate the origin of these dense, glassy clasts from a coupled geochemical and textural perspective combining literature data and case studies from Cougar Point Tuff XIII, Wolverine Creek Tuff, and Mesa Falls Tuff spanning 10 My of silicic volcanism. These results indicate that the trace elemental compositions of the dense glasses mostly overlap with the vesiculated component of each deposit, while being distinct from nearby units, thus indicating that dense glasses are juvenile. Textural complexity of the dense clasts varies across our examples. Cougar Point Tuff XIII contains a remarkable diversity of clast appearances with the same glass composition including obsidian-within-obsidian clasts. Mesa Falls Tuff contains clasts with the same glass compositions but with stark variations in phenocryst content (0 to 45%). Cumulatively, our results support a model where most dense, glassy clasts reflect conduit material that passed through multiple cycles of fracturing and sintering with concurrent mixing of glass and various crystal components. This is in contrast to previous interpretations of these clasts as entrained hyaloclastite and relaxes the requirement for water-magma interaction within the eruptive centres of the Yellowstone-Snake River Plain province.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Yellowstone-snake river plain
en_US
dc.subject
Obsidian
en_US
dc.subject
Pyroclastic
en_US
dc.subject
Trace elemental geochemistry
en_US
dc.title
Obsidian pyroclasts in the Yellowstone-Snake River Plain ignimbrites are dominantly juvenile in origin
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-03-29
ethz.journal.title
Bulletin of Volcanology
ethz.journal.volume
83
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Bull. volcanol.
ethz.pages.start
27
en_US
ethz.size
13 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Berlin
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03958 - Bachmann, Olivier / Bachmann, Olivier
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03958 - Bachmann, Olivier / Bachmann, Olivier
ethz.date.deposited
2021-04-11T02:56:50Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-04-13T11:57:13Z
ethz.rosetta.lastUpdated
2023-02-06T21:41:26Z
ethz.rosetta.versionExported
true
ethz.COinS
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