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dc.contributor.author
Fernández-Blanco, David
dc.contributor.author
Mannu, Utsav
dc.contributor.author
Cassola, Teodoro
dc.contributor.author
Bertotti, Giovanni
dc.contributor.author
Willett, Sean D.
dc.date.accessioned
2021-03-22T13:29:24Z
dc.date.available
2020-11-06T03:56:12Z
dc.date.available
2020-11-10T09:24:02Z
dc.date.available
2021-03-22T13:29:24Z
dc.date.issued
2021-04
dc.identifier.issn
0950-091X
dc.identifier.issn
1365-2117
dc.identifier.other
10.1111/bre.12518
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/449977
dc.description.abstract
Crustal rheology and surface processes strongly influence strain distribution and shape of orogenic wedges at their front but how they influence the wedge rear is still unclear. Here, we analyse the coupled control of viscosity and sedimentation on forearc high growth during advanced stages of subduction accretion. We use 2D thermo-mechanical finite element models constrained with data of the south Anatolian margin. Our simulations show that forearc highs grow as a thermally-activated viscosity drop in the lower crust induces ductile deformation and viscous flow. Initial viscosity and the amount of sediments in the forearc basin control non-linearly the occurrence and timing of the thermally-activated viscosity drop, and thus of the growth of the forearc high. High sedimentation rates result in thicker forearc basins that stabilise the subduction wedge and delay the onset of uplift in the forearc high. Low viscosities promote earlier onset of forearc high uplift and lead to larger morphological variability along the subduction margin. Increasing either the sedimentation rate or viscosity may prevent forearc high formation entirely. The thermo-viscous forearc highs grow at an age set by wedge thermal state as a function of accretionary flux, wedge viscosity, and synorogenic sedimentation. Our models explain vertical motions in south Anatolia and potentially in other accretionary margins, like the Lesser Antilles or Cascadia, during the formation of their broad forearc highs.
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.subject
Central Anatolian Plateau
en_US
dc.subject
forearc
en_US
dc.subject
forearc basin
en_US
dc.subject
orogenic wedge
en_US
dc.subject
outer-arc high
en_US
dc.subject
Turkey
en_US
dc.subject
uplift
en_US
dc.title
Sedimentation and viscosity controls on forearc high growth
en_US
dc.type
Journal Article
dc.date.published
2020-10-03
ethz.journal.title
Basin Research
ethz.journal.volume
33
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Basin res.
ethz.pages.start
1384
en_US
ethz.pages.end
1406
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
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::02704 - Geologisches Institut / Geological Institute::03754 - Willett, Sean / Willett, Sean
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03754 - Willett, Sean / Willett, Sean
ethz.date.deposited
2020-11-06T03:56:18Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-03-22T13:29:35Z
ethz.rosetta.lastUpdated
2021-03-22T13:29:35Z
ethz.rosetta.versionExported
true
ethz.COinS
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