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Exceptional mobility of an advancing rhyolitic obsidian flow at Cordon Caulle volcano in Chile: observations from Cordón Caulle, Chile, 2011-2013.

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Exceptional mobility of an advancing rhyolitic obsidian flow at Cordon Caulle volcano in Chile : observations from Cordón Caulle, Chile, 2011-2013. / Tuffen, Hugh; James, Michael; Castro, Jonathan; Schipper, C. Ian.

In: Nature Communications, Vol. 4, 2709, 01.11.2013.

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@article{e2d86bb89ab2428fbce0d336736955ac,
title = "Exceptional mobility of an advancing rhyolitic obsidian flow at Cordon Caulle volcano in Chile: observations from Cord{\'o}n Caulle, Chile, 2011-2013.",
abstract = "The emplacement mechanisms of rhyolitic lava flows are enigmatic and, despite high lava viscosities and low inferred effusion rates, can result in remarkably, laterally extensive (>30 km) flow fields. Here we present the first observations of an active, extensive rhyolitic lava flow field from the 2011–2012 eruption at Cord{\'o}n Caulle, Chile. We combine high-resolution four-dimensional flow front models, created using automated photo reconstruction techniques, with sequential satellite imagery. Late-stage evolution greatly extended the compound lava flow field, with localized extrusion from stalled, ~35 m-thick flow margins creating >80 breakout lobes. In January 2013, flow front advance continued ~3.6 km from the vent, despite detectable lava supply ceasing 6–8 months earlier. This illustrates how efficient thermal insulation by the lava carapace promotes prolonged within-flow horizontal lava transport, boosting the extent of the flow. The unexpected similarities with compound basaltic lava flow fields point towards a unifying model of lava emplacement.",
keywords = "obsidian, lava, 3D imaging, dynamics, hazards, Volcanic hazards, lava flow dynamics, Lava flow field , Rhyolite, Imaging, Chile",
author = "Hugh Tuffen and Michael James and Jonathan Castro and Schipper, {C. Ian}",
year = "2013",
month = nov,
day = "1",
doi = "10.1038/ncomms3709",
language = "English",
volume = "4",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Exceptional mobility of an advancing rhyolitic obsidian flow at Cordon Caulle volcano in Chile

T2 - observations from Cordón Caulle, Chile, 2011-2013.

AU - Tuffen, Hugh

AU - James, Michael

AU - Castro, Jonathan

AU - Schipper, C. Ian

PY - 2013/11/1

Y1 - 2013/11/1

N2 - The emplacement mechanisms of rhyolitic lava flows are enigmatic and, despite high lava viscosities and low inferred effusion rates, can result in remarkably, laterally extensive (>30 km) flow fields. Here we present the first observations of an active, extensive rhyolitic lava flow field from the 2011–2012 eruption at Cordón Caulle, Chile. We combine high-resolution four-dimensional flow front models, created using automated photo reconstruction techniques, with sequential satellite imagery. Late-stage evolution greatly extended the compound lava flow field, with localized extrusion from stalled, ~35 m-thick flow margins creating >80 breakout lobes. In January 2013, flow front advance continued ~3.6 km from the vent, despite detectable lava supply ceasing 6–8 months earlier. This illustrates how efficient thermal insulation by the lava carapace promotes prolonged within-flow horizontal lava transport, boosting the extent of the flow. The unexpected similarities with compound basaltic lava flow fields point towards a unifying model of lava emplacement.

AB - The emplacement mechanisms of rhyolitic lava flows are enigmatic and, despite high lava viscosities and low inferred effusion rates, can result in remarkably, laterally extensive (>30 km) flow fields. Here we present the first observations of an active, extensive rhyolitic lava flow field from the 2011–2012 eruption at Cordón Caulle, Chile. We combine high-resolution four-dimensional flow front models, created using automated photo reconstruction techniques, with sequential satellite imagery. Late-stage evolution greatly extended the compound lava flow field, with localized extrusion from stalled, ~35 m-thick flow margins creating >80 breakout lobes. In January 2013, flow front advance continued ~3.6 km from the vent, despite detectable lava supply ceasing 6–8 months earlier. This illustrates how efficient thermal insulation by the lava carapace promotes prolonged within-flow horizontal lava transport, boosting the extent of the flow. The unexpected similarities with compound basaltic lava flow fields point towards a unifying model of lava emplacement.

KW - obsidian

KW - lava

KW - 3D imaging

KW - dynamics

KW - hazards

KW - Volcanic hazards

KW - lava flow dynamics

KW - Lava flow field

KW - Rhyolite

KW - Imaging

KW - Chile

U2 - 10.1038/ncomms3709

DO - 10.1038/ncomms3709

M3 - Journal article

VL - 4

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 2709

ER -