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Variations in the long-term uplift rate due to the Altiplano-Puna magma body observed with Sentinel-1 interferometry

TitleVariations in the long-term uplift rate due to the Altiplano-Puna magma body observed with Sentinel-1 interferometry
Publication TypeJournal Article
Year of Publication2018
AuthorsLau N., Tymofyeyeva E., Fialko Y
JournalEarth and Planetary Science Letters
Volume491
Pagination43-47
Date Published2018/06
Type of ArticleArticle
ISBN Number0012-821X
Accession NumberWOS:000432499200005
KeywordsAltiplano; beneath; bolivia; central andes; diapir; earthquake; Geochemistry & Geophysics; inflation; InSAR; magma; uplift; uturuncu volcano; volcanic deformation
Abstract

We present new Interferometric Synthetic Aperture Radar (InSAR) observations of surface deformation in the Altiplano-Puna region (South America) where previous studies documented a broad uplift at an average rate of similar to 10 mm/yr. We use data from the Sentinel-1 satellite mission to produce high-resolution velocity maps and time series of surface displacements between years 2014-2017. The data reveal that the uplift has slowed down substantially compared to the 1992-2010 epoch and is characterized by short-term fluctuations on time scales of months to years. The observed variations in uplift rate may indicate a non-steady supply of melt and/or volatiles from the partially molten Altiplano-Puna Magma Body (APMB) into an incipient diapir forming in the roof of the APMB. (C) 2018 Elsevier B.V. All rights reserved.

DOI10.1016/j.epsl.2018.03.026
Short TitleEarth Planet. Sci. Lett.
Student Publication: 
Yes
Student: 
sharknado