Uturuncu volcano, Bolivia: Volcanic unrest due to mid-crustal magma intrusion

@article{Sparks2008UturuncuVB,
  title={Uturuncu volcano, Bolivia: Volcanic unrest due to mid-crustal magma intrusion},
  author={R S J Sparks and Chris B. Folkes and Madeleine C. S. Humphreys and Dan N. Barfod and Jorge Clavero and Mayel Sunagua and Stephen R. McNutt and Matthew E. Pritchard},
  journal={American Journal of Science},
  year={2008},
  volume={308},
  pages={727 - 769}
}
Uturuncu volcano, SW Bolivia, is a dormant stratovolcano (∼85 km3) dominated by dacitic lava domes and flows. 39Ar/40Ar ages show that the volcano was active between 890 ka and 271 ka, with the lavas becoming younger and less extensive at higher elevations. There are current signs of unrest. Between 1992 and 2006 geodetic satellite measurements record an ongoing 70 km deformation field with a central uplift rate of 1 to 2 cm/yr. Deformation indicates volume changes of 400 × 108 m3 over 14 years… 
Focused magmatism beneath Uturuncu volcano, Bolivia: Insights from seismic tomography and deformation modeling
We have carried out a tomographic inversion for seismic velocity in the vicinity of Uturuncu volcano (Bolivia) based on a 33-station temporary seismic network deployment. We combine travel times from
Magnetotelluric images of magma distribution beneath Volcán Uturuncu, Bolivia: Implications for magma dynamics
The Altiplano-Puna volcanic complex in the central Andes records a history of major caldera-forming eruptions over the past 10 m.y. Geophysical and geodetic data indicate that magma is still present,
The temporal record of magmatism at Cerro Uturuncu, Bolivian Altiplano
Abstract Twenty-six new 40Ar/39Ar plateau ages for 23 lavas and domes from the Uturuncu volcano in the Altiplano of SW Bolivia reveal a protracted eruptive history from 1050±5 to 250±5 ka. Eruptions
Receiver function analyses of Uturuncu volcano, Bolivia and vicinity
Uturuncu volcano, located near the borders of Chile and Bolivia in the Central Andes, has been identified as one of two volcanoes in the region with largescale and active, yet decelerating,
Topographic constraints on magma accumulation below the actively uplifting Uturuncu and Lazufre volcanic centers in the Central Andes
Geodetic surveys of Volcan Uturuncu and the Lazufre volcanic complex in the Central Andes of South America reveal sustained surface uplift from magmatic intrusion at depth. However, the decadal
New constraints on the magma distribution and composition beneath Volcán Uturuncu and the southern Bolivian Altiplano from magnetotelluric data
Magnetotelluric (MT) data were used to create a three-dimensional electrical resistivity model of the Altiplano-Puna magma body (APMB) in the area surrounding Volcan Uturuncu in southern Bolivia.
Thermomechanical modeling of the Altiplano-Puna deformation anomaly: Multiparameter insights into magma mush reorganization
A 150-km-wide ground deformation anomaly in the Altiplano-Puna vol­canic complex (APVC) of the Central Andes, with uplift centered on Uturuncu volcano and peripheral subsidence, alludes to complex
Petrological imaging of an active pluton beneath Cerro Uturuncu, Bolivia
Abstract Uturuncu is a dormant volcano in the Altiplano of SW Bolivia. A present day ~70 km diameter interferometric synthetic aperture radar (InSAR) anomaly roughly centred on Uturuncu’s edifice is
The Volcanic Evolution of Cerro Uturuncu: A High-K, Composite Volcano in the Back-Arc of the Central Andes of SW Bolivia
Cerro Uturuncu, southwest Bolivia, is a high-K, calc-alkaline, composite volcano constructed upon extremely thick continental crust approximately 125 km behind the arc-front of the Andean Central
Large‐scale inflation of Tungurahua volcano (Ecuador) revealed by Persistent Scatterers SAR interferometry
The Tungurahua volcano, in Ecuador, has been experiencing a substantial activity period since 1999, with several eruptions, including those of 2006 and 2008. We use a persistent scatterers approach
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 127 REFERENCES
Volcanism and structure of southwestern Bolivia
Abstract Cenozoic volcanic activity started in southwestern Bolivia during the Oligocene. From the Early Miocene up to the Holocene, volcanism produced about 8000 km 3 of lavas and pyroclastic rocks.
Large ignimbrite eruptions and volcano-tectonic depressions in the Central Andes: a thermomechanical perspective
Abstract The Neogene ignimbrite flare-up of the Altiplano Puna Volcanic Complex (APVC) of the Central Andes produced one of the best-preserved large silicic volcanic fields on Earth. At least 15 000
Modeling of highly anisotropic crust and application to the Altiplano‐Puna volcanic complex of the central Andes
[1] The Altiplano-Puna volcanic complex (APVC) is located in the central Andes and covers an area over 50,000 km2. The style of volcanism is predominately caldera-forming ignimbrite eruptions active
Altiplano-Puna volcanic complex of the central Andes
Since the late Miocene an ignimbrite flare-up has resulted in a major volcano-tectonic province, the Altiplano-Puna volcanic complex, in the lat 21° to 24°S part of the Central Volcanic Zone of the
Crustal contributions to arc magmatism in the Andes of Central Chile
Fifteen andesite-dacite stratovolcanoes on the volcanic front of a single segment of the Andean arc show along-arc changes in isotopic and elemental ratios that demonstrate large crustal
Episodic construction of batholiths: Insights from the spatiotemporal development of an ignimbrite flare-up
Abstract Using the canon that large silicic volcanic fields are the surface manifestation of batholith formation at depth as a departure, we examine what the spatiotemporal pattern of the 10–1 Ma
Seismic Detection and Characterization of the Altiplano-Puna Magma Body, Central Andes
Abstract — The Altiplano-Puna Volcanic Complex (APVC) in the central Andes is the product of an ignimbrite “flare-up” of world class proportions (de Silva, 1989). The region has been the site of
The Tectonic Setting of Active Andean Volcanism
The Andean plate margin of South America is characterized by the seismicity, tectonism and magmatism associated with the descent of the oceanic Nazca plate below the South American plate. The active
The volcanic evolution of Montserrat using 40Ar/39Ar geochronology
Abstract 40Ar/39Ar dating has facilitated a substantial reinterpretation of the volcanic evolution of Montserrat. Three volcanic centres with non-overlapping volcanic activity are identified: Silver
Remobilization of Andesite Magma by Intrusion of Mafic Magma at the Soufriere Hills Volcano, Montserrat, West Indies
The 1995–1999 eruption of the Soufriere Hills volcano, MontINTRODUCTION serrat, has produced a crystal-rich andesite containing quenchThe Soufriere Hills volcano, Montserrat, located in the textured
...
1
2
3
4
5
...