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

Citation:
Lau, N, Tymofyeyeva E, Fialko Y.  2018.  Variations in the long-term uplift rate due to the Altiplano-Puna magma body observed with Sentinel-1 interferometry. Earth and Planetary Science Letters. 491:43-47.

Date Published:

2018/06

Keywords:

altiplano, 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.

Notes:

n/a

Website

DOI:

10.1016/j.epsl.2018.03.026