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- W2324955034 abstract "Research Article| June 01, 2012 The invisible hand: Tectonic triggering and modulation of a rhyolitic supereruption Aidan S.R. Allan; Aidan S.R. Allan * 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand *E-mail: aidan.allan@vuw.ac.nz. Search for other works by this author on: GSW Google Scholar Colin J.N. Wilson; Colin J.N. Wilson 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand Search for other works by this author on: GSW Google Scholar Marc-Alban Millet; Marc-Alban Millet 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand Search for other works by this author on: GSW Google Scholar Richard J. Wysoczanski Richard J. Wysoczanski 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand2National Institute of Water and Atmospheric Research, Private Bag 14901, Wellington 6021, New Zealand Search for other works by this author on: GSW Google Scholar Author and Article Information Aidan S.R. Allan * 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand Colin J.N. Wilson 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand Marc-Alban Millet 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand Richard J. Wysoczanski 1School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand2National Institute of Water and Atmospheric Research, Private Bag 14901, Wellington 6021, New Zealand *E-mail: aidan.allan@vuw.ac.nz. Publisher: Geological Society of America Received: 26 Oct 2011 Revision Received: 15 Jan 2012 Accepted: 23 Jan 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (6): 563–566. https://doi.org/10.1130/G32969.1 Article history Received: 26 Oct 2011 Revision Received: 15 Jan 2012 Accepted: 23 Jan 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Aidan S.R. Allan, Colin J.N. Wilson, Marc-Alban Millet, Richard J. Wysoczanski; The invisible hand: Tectonic triggering and modulation of a rhyolitic supereruption. Geology 2012;; 40 (6): 563–566. doi: https://doi.org/10.1130/G32969.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Identifying the processes that initiate and control large explosive eruptions on time scales of human interest is challenging. We present evidence for syneruptive, subsurface interactions between rhyolite magmas derived from distinctive sources that reflect tectonic processes starting, then temporarily stopping, the 27 ka Oruanui supereruption (530 km3 magma; Taupo, New Zealand). Subordinate (3%–16%) biotite-bearing pumice lapilli occur in fall deposits from phases 1 and 2 (of 10) among the biotite-free “normal” pumices in the Oruanui deposits. The biotite-bearing magma is sourced to an independent magmatic system 10–15 km northeast of Taupo. Lateral migration of the biotite-bearing magma was initiated during a rifting episode that also triggered the Oruanui eruption. Limited physical mingling indicates that the biotite-bearing and Oruanui biotite-free magmas interacted in the conduit simultaneously with eruption. After phase 1, a time break of months elapsed before phase 2 explosive activity resumed from the same vent, again with intermixed biotite-bearing magma. A rift-related tectonic event, with its accompanying stress change, is inferred to have initiated diking from northeast to southwest, transporting biotite-bearing magma and triggering the Oruanui eruption. Stress relaxation following the rifting event terminated phase 1 before a tectonic event caused renewed diking and activity in phase 2. Tectonics may trigger large silicic eruptions through rupturing of shallow crustal magma chambers and lateral magma transport, especially in extensional regimes, without necessarily leaving any discernible geological imprint. Only the presence of a “foreign” magma in the Oruanui deposits allows the tectonic control to be identified. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2324955034 title "The invisible hand: Tectonic triggering and modulation of a rhyolitic supereruption" @default.
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