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dc.contributor.author
Herwegh, Marco
dc.contributor.author
Berger, Alfons
dc.contributor.author
Baumberger, Roland
dc.contributor.author
Wehrens, Philip
dc.contributor.author
Kissling, Edi
dc.date.accessioned
2018-10-11T15:06:25Z
dc.date.available
2017-06-12T20:47:08Z
dc.date.available
2018-10-11T15:06:25Z
dc.date.issued
2017-03-24
dc.identifier.issn
2045-2322
dc.identifier.other
10.1038/s41598-017-00440-0
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/130321
dc.identifier.doi
10.3929/ethz-b-000130321
dc.description.abstract
The crustal-scale geometry of the European Alps has been explained by a classical subduction-scenario comprising thrust-and-fold-related compressional wedge tectonics and isostatic rebound. However, massive blocks of crystalline basement (External Crystalline Massifs) vertically disrupt the upper-crustal wedge. In the case of the Aar massif, top basement vertically rises for >12 km and peak metamorphic temperatures increase along an orogen-perpendicular direction from 250 °C–450 °C over horizontal distances of only <15 km (Innertkirchen-Grimselpass), suggesting exhumation of midcrustal rocks with increasing uplift component along steep vertical shear zones. Here we demonstrate that delamination of European lower crust during lithosphere mantle rollback migrates northward in time. Simultaneously, the Aar massif as giant upper crustal block extrudes by buoyancy forces, while substantial volumes of lower crust accumulate underneath. Buoyancy-driven deformation generates dense networks of steep reverse faults as major structures interconnected by secondary branches with normal fault component, dissecting the entire crust up to the surface. Owing to rollback fading, the component of vertical motion reduces and is replaced by a late stage of orogenic compression as manifest by north-directed thrusting. Buoyancy-driven vertical tectonics and modest late shortening, combined with surface erosion, result in typical topographic and metamorphic gradients, which might represent general indicators for final stages of continent-continent collisions.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Geodynamics
en_US
dc.subject
Geophysics
en_US
dc.subject
Tectonics
en_US
dc.title
Large-Scale Crustal-Block-Extrusion During Late Alpine Collision
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Scientific Reports
ethz.journal.volume
7
en_US
ethz.pages.start
413
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
006751867
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03476 - Giardini, Domenico / Giardini, Domenico
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03476 - Giardini, Domenico / Giardini, Domenico
ethz.date.deposited
2017-06-12T20:47:14Z
ethz.source
ECIT
ethz.identifier.importid
imp593655661968e81730
ethz.ecitpid
pub:193327
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-15T18:14:10Z
ethz.rosetta.lastUpdated
2020-02-15T15:22:32Z
ethz.rosetta.versionExported
true
ethz.COinS
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