Variations in the long-term uplift rate due to the Altiplano-Puna magma body observed with Sentinel-1 interferometry
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 ∼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.
- Publication:
-
Earth and Planetary Science Letters
- Pub Date:
- June 2018
- DOI:
- Bibcode:
- 2018E&PSL.491...43L
- Keywords:
-
- Altiplano;
- magma;
- diapir;
- uplift;
- InSAR
