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dc.contributor.author
Kästner, Felix
dc.contributor.author
Pierdominici, Simona
dc.contributor.author
Elger, Judith
dc.contributor.author
Zappone, Alba
dc.contributor.author
Kück, Jochem
dc.contributor.author
Berndt, Christian
dc.date.accessioned
2020-05-14T09:40:04Z
dc.date.available
2020-05-14T02:42:15Z
dc.date.available
2020-05-14T09:40:04Z
dc.date.issued
2020
dc.identifier.issn
1869-9510
dc.identifier.issn
1869-9529
dc.identifier.other
10.5194/se-11-607-2020
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/414686
dc.identifier.doi
10.3929/ethz-b-000414686
dc.description.abstract
Deeply rooted thrust zones are key features of tectonic processes and the evolution of mountain belts. Exhumed and deeply eroded orogens like the Scandinavian Caledonides allow us to study such systems from the surface. Previous seismic investigations of the Seve Nappe Complex have shown indications of a strong but discontinuous reflectivity of this thrust zone, which is only poorly understood. The correlation of seismic properties measured on borehole cores with surface seismic data can constrain the origin of this reflectivity. To this end, we compare seismic velocities measured on cores to in situ velocities measured in the borehole. For some intervals of the COSC-1 borehole, the core and downhole velocities deviate by up to 2 km s−1. These differences in the core and downhole velocities are most likely the result of microcracks mainly due to depressurization. However, the core and downhole velocities of the intervals with mafic rocks are generally in close agreement. Seismic anisotropy measured in laboratory samples increases from about 5 % to 26 % at depth, correlating with a transition from gneissic to schistose foliation. Thus, metamorphic foliation has a clear expression in seismic anisotropy. These results will aid in the evaluation of core-derived seismic properties of high-grade metamorphic rocks at the COSC-1 borehole and elsewhere.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus Publications
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Correlation of core and downhole seismic velocities in high-pressure metamorphic rocks: a case study for the COSC-1 borehole, Sweden
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-04-23
ethz.journal.title
Solid Earth
ethz.journal.volume
11
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Solid earth
ethz.pages.start
607
en_US
ethz.pages.end
626
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2020-05-14T02:42:19Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-05-14T09:40:22Z
ethz.rosetta.lastUpdated
2021-02-15T11:00:43Z
ethz.rosetta.versionExported
true
ethz.COinS
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