dc.contributor.author
Rodriguez Piceda, Constanza
dc.contributor.author
Gao, Ya-Jian
dc.contributor.author
Cacace, Mauro
dc.contributor.author
Scheck-Wenderoth, Magdalena
dc.contributor.author
Bott, Judith
dc.contributor.author
Strecker, Manfred
dc.contributor.author
Tilmann, Frederik
dc.date.accessioned
2023-05-25T08:14:40Z
dc.date.available
2023-05-25T08:14:40Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/39560
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-39278
dc.description.abstract
Knowledge of the causative dynamics of earthquakes along subduction-zone interfaces and within oceanic slabs is relevant for improving future seismic hazard assessments. Here, we combine the analysis of seismic tomography, the 3D structure of the slab and seismicity to investigate the controlling factors driving slab seismic activity beneath the southern Central Andes. We evaluate the ratio distribution between compressional and shear-wave seismic velocities (Vp/Vs) as a proxy for the hydration state of the lithospheric mantle, oceanic slab, and plate interface. Regions of high Vp/Vs, i.e. areas of hydrated mantle, are principally caused by compaction effects and dehydration reactions. In contrast, slab seismicity in areas of low Vp/Vs and inferred lower fluid content in the overriding plate is facilitated by enhanced flexural stresses due to changes in the subduction angle of the oceanic plate. Plate-interface background seismicity correlates with areas of higher Vp/Vs (hydrous interface) at depths <50 km, while areas of most pronounced plate-locking coincide with regions of low Vp/Vs (anhydrous interface). The regions of anhydrous plate interface are likely candidates for future great megathrust events due to their higher potential for elastic energy accumulation compared to more hydrated regions.
en
dc.format.extent
10 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
southern Central Andes
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
The influence of mantle hydration and flexure on slab seismicity in the southern Central Andes
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
79
dcterms.bibliographicCitation.doi
10.1038/s43247-023-00729-1
dcterms.bibliographicCitation.journaltitle
Communications Earth & Environment
dcterms.bibliographicCitation.number
1
dcterms.bibliographicCitation.volume
4
dcterms.bibliographicCitation.url
https://doi.org/10.1038/s43247-023-00729-1
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Geophysik
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refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2662-4435
refubium.resourceType.provider
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