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50 years of steady ground deformation in the Altiplano-Puna region of Southern Bolivia

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50 years of steady ground deformation in the Altiplano-Puna region of Southern Bolivia. / Gottsmann, Joachim H; del Potro, Rodrigo; Muller, Cyril S.

In: Geosphere, Vol. 14, No. 1, 02.2018, p. 65-73.

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Gottsmann, Joachim H ; del Potro, Rodrigo ; Muller, Cyril S. / 50 years of steady ground deformation in the Altiplano-Puna region of Southern Bolivia. In: Geosphere. 2018 ; Vol. 14, No. 1. pp. 65-73.

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@article{f440480e6e39449e80cfdde89667e4f4,
title = "50 years of steady ground deformation in the Altiplano-Puna region of Southern Bolivia",
abstract = "The Altiplano Puna Volcanic Complex of the Central Andes is host to a ~150 km wide, quasi-circular ground deformation anomaly centered on Uturuncu volcano (Bolivia). The precise onset and duration of this deformation is unclear, but geomorphologic studies bracket its initiation at less than a few hundred years ago. Here we report on the deformation history over a ~50 year period by deriving orthometric height changes from leveling and GNSS observations at 53 benchmarks along a regional leveling line that crosses the deformation anomaly. The comparison of InSAR LOS and LOS-projected orthometric ground velocities in a common reference frame reveal central uplift extending to ~35 km from Uturuncu at a maximum orthometric rate of 1.2 cm yr-1, and peripheral subsidence, at a maximum rate of 0.3 cm yr-1 to ~60 km from Uturuncu. This pattern is consistent with the spatial extent and average rate of deformation observed by InSAR. Our interpretation of the data is that long-wavelength ground uplift at Uturuncu has likely occurred at a quasi-constant rate for at least half a century. This study bridges the observational timespans between modern satellite geodetic observations (up to a few decades) and geomorphological observations (few centuries and longer) of the recent deformation history of the continental crust in the Central Andes and adds to a select group of case studies of quantifiable long-term volcano deformation world-wide.",
author = "Gottsmann, {Joachim H} and {del Potro}, Rodrigo and Muller, {Cyril S}",
year = "2018",
month = "2",
doi = "10.1130/GES01570.1",
language = "English",
volume = "14",
pages = "65--73",
journal = "Geosphere",
issn = "1553-040X",
publisher = "Geological Society of America",
number = "1",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - 50 years of steady ground deformation in the Altiplano-Puna region of Southern Bolivia

AU - Gottsmann, Joachim H

AU - del Potro, Rodrigo

AU - Muller, Cyril S

PY - 2018/2

Y1 - 2018/2

N2 - The Altiplano Puna Volcanic Complex of the Central Andes is host to a ~150 km wide, quasi-circular ground deformation anomaly centered on Uturuncu volcano (Bolivia). The precise onset and duration of this deformation is unclear, but geomorphologic studies bracket its initiation at less than a few hundred years ago. Here we report on the deformation history over a ~50 year period by deriving orthometric height changes from leveling and GNSS observations at 53 benchmarks along a regional leveling line that crosses the deformation anomaly. The comparison of InSAR LOS and LOS-projected orthometric ground velocities in a common reference frame reveal central uplift extending to ~35 km from Uturuncu at a maximum orthometric rate of 1.2 cm yr-1, and peripheral subsidence, at a maximum rate of 0.3 cm yr-1 to ~60 km from Uturuncu. This pattern is consistent with the spatial extent and average rate of deformation observed by InSAR. Our interpretation of the data is that long-wavelength ground uplift at Uturuncu has likely occurred at a quasi-constant rate for at least half a century. This study bridges the observational timespans between modern satellite geodetic observations (up to a few decades) and geomorphological observations (few centuries and longer) of the recent deformation history of the continental crust in the Central Andes and adds to a select group of case studies of quantifiable long-term volcano deformation world-wide.

AB - The Altiplano Puna Volcanic Complex of the Central Andes is host to a ~150 km wide, quasi-circular ground deformation anomaly centered on Uturuncu volcano (Bolivia). The precise onset and duration of this deformation is unclear, but geomorphologic studies bracket its initiation at less than a few hundred years ago. Here we report on the deformation history over a ~50 year period by deriving orthometric height changes from leveling and GNSS observations at 53 benchmarks along a regional leveling line that crosses the deformation anomaly. The comparison of InSAR LOS and LOS-projected orthometric ground velocities in a common reference frame reveal central uplift extending to ~35 km from Uturuncu at a maximum orthometric rate of 1.2 cm yr-1, and peripheral subsidence, at a maximum rate of 0.3 cm yr-1 to ~60 km from Uturuncu. This pattern is consistent with the spatial extent and average rate of deformation observed by InSAR. Our interpretation of the data is that long-wavelength ground uplift at Uturuncu has likely occurred at a quasi-constant rate for at least half a century. This study bridges the observational timespans between modern satellite geodetic observations (up to a few decades) and geomorphological observations (few centuries and longer) of the recent deformation history of the continental crust in the Central Andes and adds to a select group of case studies of quantifiable long-term volcano deformation world-wide.

U2 - 10.1130/GES01570.1

DO - 10.1130/GES01570.1

M3 - Article

VL - 14

SP - 65

EP - 73

JO - Geosphere

T2 - Geosphere

JF - Geosphere

SN - 1553-040X

IS - 1

ER -