Comparative mass balance of volcanic edifices at the Southern Volcanic Zone of the Andes between 33°S and 46°S.

Völker, David, Kutterolf, Steffen and Wehrmann, Heidi (2011) Comparative mass balance of volcanic edifices at the Southern Volcanic Zone of the Andes between 33°S and 46°S. Journal of Volcanology and Geothermal Research, 205 . pp. 114-129. DOI 10.1016/j.jvolgeores.2011.03.011.

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Abstract

Volcano edifice volume calculations are presented for 65 volcanoes of the 1400 km long Chilean Southern Volcanic Zone (SVZ) as a basic step in subduction zone mass budgets. Volume calculations are performed in a Geographical Information System that integrates Digital Elevation Models based on of Shuttle Radar Topography Mission as well as ASTER-GDEM topographic data, LANDSAT satellite images and geological maps. The method of volume calculation is straightforward for isolated, morphologically well-defined stratovolcanoes. Uncertainties increase for volcanic edifices that formed on pre-existing rugged terrain, for multi-phase eruptive centers, as well as for eroded edifices. A revised segmentation of the arc is used to describe the spatial volume distribution of extruded magma along the SVZ and to discuss controlling tectonic factors. Peak volumes between arc and back arc are offset by 400 km. The total volcanic extrusion is in the range of 10–13 km3/km/Ma. Major differences between the SVZ and the Central American subduction system are notable with regard to volcano density and maximum volumes.

Document Type: Article
Keywords: Volcanology; volcano edifice volumes; SRTM images; GRASS-GIS; magma extrusion; Chilean Southern Volcanic Zone; SVZ
Research affiliation: OceanRep > SFB 574 > C4
OceanRep > SFB 574 > A1
OceanRep > SFB 574 > C2
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.jvolgeores.2011.03.011
ISSN: 0377-0273
Projects: SFB574
Contribution Number:
ProjectNumber
SFB 574175
Expeditions/Models/Experiments:
Date Deposited: 13 Jul 2010 13:01
Last Modified: 15 Sep 2017 12:05
URI: http://oceanrep.geomar.de/id/eprint/8638

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