Rapid laccolith intrusion driven by explosive volcanic eruption

Castro, Jonathan and Cordonnier, Benoit and Schipper, C. Ian and Tuffen, Hugh and Baumann, Tobias and Feisel, Yves (2016) Rapid laccolith intrusion driven by explosive volcanic eruption. Nature Communications, 7. ISSN 2041-1723

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Abstract

Magmatic intrusions and volcanic eruptions are intimately related phenomena. Shallow magma intrusion builds subsurface reservoirs that are drained by volcanic eruptions. Thus, the long-held view is that intrusions must precede and feed eruptions. Here we show that explosive eruptions can also cause magma intrusion. We provide an account of a rapidly emplaced laccolith during the 2011 rhyolite eruption of Cordón Caulle, Chile. Remote sensing indicates that an intrusion began after eruption onset and caused severe (>200 m) uplift over 1 month. Digital terrain models resolve a laccolith-shaped body ∼0.8 km3. Deformation and conduit flow models indicate laccolith depths of only ∼20–200 m and overpressures (∼1–10 MPa) that likely stemmed from conduit blockage. Our results show that explosive eruptions may rapidly force significant quantities of magma in the crust to build laccoliths. These iconic intrusions can thus be interpreted as eruptive features that pose unique and previously unrecognized volcanic hazards.

Item Type:
Journal Article
Journal or Publication Title:
Nature Communications
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
83113
Deposited By:
Deposited On:
23 Nov 2016 16:24
Refereed?:
Yes
Published?:
Published
Last Modified:
13 May 2020 04:01