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Cited by 84Synthetic Aperture Radar (SAR) Applications and Techniquesearthquake and tectonic studiesGeological and Tectonic Studies in Latin America

The DOI matches its Crossref record; 82 of the 82 references it cites were found in a registry or an index.

Rapid uplift in Laguna del Maule volcanic field of the Andean Southern Volcanic zone (Chile) 2007–2012

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Feigl, Kurt L., Le Mével, Hélène, Tabrez Ali, S., Córdova, Loreto, Andersen, Nathan L., DeMets, Charles, Singer, Bradley S.·2014·Geophysical Journal International
DOI 10.1093/gji/ggt438
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Abstract

The Laguna del Maule (LdM) volcanic field in Chile is an exceptional example of postglacial rhyolitic volcanism in the Southern Volcanic Zone of the Andes. By interferometric analysis of synthetic aperture radar (SAR) images acquired between 2007 and 2012, we measure exceptionally rapid deformation. The maximum vertical velocity exceeds 280 mm yr–1. Although the rate of deformation was negligible from 2003 January to 2004 February, it accelerated some time before 2007 January. Statistical testing rejects, with 95 per cent confidence, four hypotheses of artefacts caused by tropospheric gradients, ionospheric effects, orbital errors or topographic relief, respectively. The high rate of deformation is confirmed by daily estimates of position during several months in 2012, as measured by analysis of signals transmitted by the Global Positioning System (GPS) and received on the ground at three stations around the reservoir forming the LdM. The fastest-moving GPS station (MAU2) has a velocity vector of [–180 ± 4, 46 ± 2, 280 ± 4] mm yr–1 for the northward, eastward and upward components, respectively, with respect to the stable interior of the South America Plate. The observed deformation cannot be explained by changes in the gravitational load caused by variations in the water level in the reservoir. For the most recent observation time interval, spanning 44 d in early 2012, the model that best fits the InSAR observations involves an inflating sill at a depth of 5.2 ± 0.3 km, with length 9.0 ± 0.3 km, width 5.3 ± 0.4 km, dip 20 ± 3° from horizontal and strike 14 ± 5° clockwise from north, assuming a rectangular dislocation in a half-space with uniform elastic properties. During this time interval, the estimated rate of tensile opening is 1.1 ± 0.04 m yr–1, such that the rate of volume increase in the modelled sill is 51 ± 5 million m3 yr–1 or 1.6 ± 0.2 m3 s–1. From 2004 January to 2012 April the total increase in volume was at least 0.15 km3 over the 5.2-yr interval observed by InSAR. The inflating region includes most of the 16-km-by-14-km ring of rhyolitic domes and coulees. The similarity of high-silica rhyolite compositions on opposite sides of the ring and the concentration of rhyolitic eruptions since ∼20 ka suggest that processes within a large silicic magma chamber are responsible for the current deformation.

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Crossref · 10.1093/gji/ggt438

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Research works printed but not linked: 2

  1. CNES, 2006, DIAPASON Automated Interferometric Processing Software
  2. OVDAS, 2012, Earthquake Report, Observatorio Volcanológico de los Andes del Sur (OVDAS), Servicio Nacional de Geología y Minería (SERNAGEOMIN)

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Metadata

Authors
Feigl, K. L., Le Mével, H., Tabrez Ali, S., Córdova, L., Andersen, N. L., DeMets, C., & Singer, B. S.
Affiliations
  • University of Wisconsin–Madison (US)
  • Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706, USA. E-mail: feigl@wisc.edu
  • Servicio Nacional de Geologia y Mineria (CL)
ORCID
Venue
Geophysical Journal International
Publisher
Oxford University Press (OUP)
Published
2013-12-06
Volume
196
Issue
2
Pages
885-901
ISSN
  • 0956-540X (ISSN-L)
  • 1365-246X
DOI
10.1093/gji/ggt438
OpenAlex
W2017765766
Semantic Scholar
fa63325b59de76c29ea1d5104413f5e529f46f95
Cited by
84
References
82
Citations by year
2026: 4 · 2025: 8 · 2024: 7 · 2023: 2 · 2022: 6 · 2021: 6 · 2020: 10 · 2019: 10 · 2018: 11 · 2017: 5 · 2016: 5 · 2015: 5 · 2014: 5
FWCI
8.02
Type
journal article
Language
en
Open access
Licence
Locations
  • Geophysical Journal International (publishedVersion, cc-by)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Synthetic Aperture Radar (SAR) Applications and Techniques
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › earthquake and tectonic studies
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Tectonic Studies in Latin America
Keywords
InSAR deformation, GPS velocities, magma plumbing system

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