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Magma reservoir dynamics at Toba caldera, Indonesia, recorded by oxygen isotope zoning in quartz

Abstract:

Quartz is a common phase in high-silica igneous rocks and is resistant to post-eruptive alteration, thus offering a reliable record of magmatic processes in silicic magma systems. Here we employ the 75 ka Toba super-eruption as a case study to show that quartz can resolve late-stage temporal changes in magmatic δ18O values. Overall, Toba quartz crystals exhibit comparatively high δ18O values, up to 10.2 ‰, due to magma residence within, and assimilation of, local granite basement. However, so...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1038/srep40624

Authors


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Institution:
University of Oxford
Division:
SSD
Department:
School of Archaeology
Role:
Author
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Name:
Centre for Natural Disaster Science
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Name:
Istituto Nazionale di Geofisica e Vulcanologia
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Name:
National Research Foundation of South Africa
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Name:
Scripps Institution of Oceanography
Publisher:
Nature Publishing Group
Journal:
Scientific Reports More from this journal
Volume:
7
Pages:
40624
Publication date:
2017-01-01
Acceptance date:
2016-12-08
DOI:
ISSN:
2045-2322
Pubs id:
pubs:671615
UUID:
uuid:24264a90-7a1e-4b7c-a535-02c478433d87
Local pid:
pubs:671615
Source identifiers:
671615
Deposit date:
2017-01-18

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