Gutenberg Open Science: A multiphysics approach to constrain the dynamics of the Altiplano-Puna magmatic system

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8070

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DC Field	Value	Language
dc.contributor.author	Spang, Arne	-
dc.contributor.author	Baumann, Tobias	-
dc.contributor.author	Kaus, Boris	-
dc.date.accessioned	2022-11-09T11:34:41Z	-
dc.date.available	2022-11-09T11:34:41Z	-
dc.date.issued	2021	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8085	-
dc.description.abstract	Continuous Interferometric Synthetic Aperture Radar (InSAR) monitoring (>25 years) has revealed a concentric surface deformation pattern above the Altiplano-Puna magma body (APMB) in the central Andes. Here, we use a joint interpretation of seismic imaging, gravity anomalies, and InSAR data to constrain location, 3D geometry, and density of the magma body. By combining gravity modeling, thermomechanical modeling, scaling law analysis, and Bayesian inference, we are able to create a relationship between the geometry of a mid-crustal magma body and surface observations. Furthermore, we can estimate the uncertainties associated with the geometry of the APMB and identify the most important parameters that control the dynamics of the system. We constrain the density contrast between the APMB and the surrounding host rock to 90–130 kg m−3 (2σ) and the associated melt fraction to 15%–22%. Our visco-elasto-plastic 3D thermomechanical model reproduces the observed surface deformation self-consistently by buoyancy driven magma transport without the need for additional pressure sources. The flow pattern is controlled by a central rise at the top of the APMB whose geometry can be constrained with the help of InSAR observations while Bouguer anomalies constrain the deeper parts of the APMB. Automated scaling law analysis shows that the rheology of the upper crust and the magma mush as well as the density contrast between the two are the most important parameters in the system and need to be constrained for a better understanding of the subsurface processes.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY-NC	*
dc.rights.uri	https://creativecommons.org/licenses/by-nc/4.0/	*
dc.subject.ddc	550 Geowissenschaften	de_DE
dc.subject.ddc	550 Earth sciences	en_GB
dc.title	A multiphysics approach to constrain the dynamics of the Altiplano-Puna magmatic system	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8070	-
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Journal of geophysical research : B, Solid earth	de
jgu.journal.volume	126	de
jgu.journal.issue	7	de
jgu.pages.alternative	e2021JB021725	de
jgu.publisher.year	2021	-
jgu.publisher.name	Wiley	de
jgu.publisher.place	Hoboken, NJ	de
jgu.publisher.issn	2169-9356	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	550	de
jgu.publisher.doi	10.1029/2021JB021725	de
jgu.organisation.ror	https://ror.org/023b0x485	-
Appears in collections:	JGU-Publikationen

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