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dc.contributor.author
Comeau, Matthew J.
dc.contributor.author
Becken, Michael
dc.contributor.author
Connolly, James
dc.contributor.author
Grayver, Alexander V.
dc.contributor.author
Kuvshinov, Alexey
dc.date.accessioned
2020-10-26T09:51:11Z
dc.date.available
2020-10-22T08:50:13Z
dc.date.available
2020-10-26T09:51:11Z
dc.date.issued
2020-10-16
dc.identifier.issn
0094-8276
dc.identifier.issn
1944-8007
dc.identifier.other
10.1029/2020GL088455
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/447190
dc.identifier.doi
10.3929/ethz-b-000447190
dc.description.abstract
We present electrical resistivity models, derived from magnetotelluric data, of the crust beneath the Bulnay region, Mongolia. They reveal that the lower crust contains a pattern of discrete zones (width of ~25 km) of low resistivity (<30 Ωm). Such features may be an effect of unaccounted‐for electrical anisotropy. However, when anisotropy is considered in the modeling, the features remain. We investigate an alternative explanation, based on a conceptual model of fluid localization and stagnation by thermally activated compaction, and demonstrate it is compatible with the observed low‐resistivity zones. The model explains the location, shape, and size of the zones, with plausible values of the activation energy for lower crustal creep (270–360 kJ/mol), and a viscous compaction length on the order of 10 km. The results imply tectonic deformation and compaction processes, rather than lithological‐structural heterogeneity, control the regional lower crustal fluid flow.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Geophysical Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc/4.0/
dc.title
Compaction‐Driven Fluid Localization as an Explanation for Lower Crustal Electrical Conductors in an Intracontinental Setting
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 4.0 International
dc.date.published
2020-09-28
ethz.journal.title
Geophysical Research Letters
ethz.journal.volume
47
en_US
ethz.journal.issue
19
en_US
ethz.journal.abbreviated
Geophys. Res. Lett.
ethz.pages.start
e2020GL088455
en_US
ethz.size
11 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Crust-mantle interactions beneath the Hangai Mountains in western Mongolia. Insights from 3D magnetotelluric studies and 4D thermo-mechanical modelling
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
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::03734 - Jackson, Andrew / Jackson, Andrew
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03592 - Schmidt, Max / Schmidt, Max
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03592 - Schmidt, Max / Schmidt, Max
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::03734 - Jackson, Andrew / Jackson, Andrew
ethz.grant.agreementno
162660
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.date.deposited
2020-10-22T08:50:31Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-10-26T09:51:24Z
ethz.rosetta.lastUpdated
2023-02-06T20:36:21Z
ethz.rosetta.versionExported
true
ethz.COinS
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