dc.date.accessioned | 2021-04-09T19:39:06Z | |
dc.date.available | 2022-04-10T22:46:02Z | |
dc.date.created | 2020-10-22T13:51:50Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Ceccato, Alberto Menegon, Luca Warren, Clare Halton, Alison M. . Structural and metamorphic inheritance controls strain partitioning during orogenic shortening (Kalak Nappe Complex, Norwegian Caledonides).. Journal of Structural Geology. 2020, 136 | |
dc.identifier.uri | http://hdl.handle.net/10852/85124 | |
dc.description.abstract | The occurrence of pre-collisional structural and metamorphic fabrics may control the development of new structures during subsequent orogenic deformation. Structural, petrological and geochronological analyses have been performed on selected samples collected along a NW-SE cross section of the Kalak Nappe Complex (KNC) exposed on Kvaløya Island (Finnmark, Norway), in order to define pre-Caledonian or Caledonian affinity of deformation fabrics. Nappes within the KNC experienced different pre-collisional tectonometamorphic histories, resulting in contrasting pre-Caledonian fabrics, which in turn controlled orogen-scale strain partitioning and metamorphic re-equilibration during Caledonian shortening. Caledonian deformation during top-to-SE-directed thrusting occurred at 550–675 °C and 0.8–1.0 GPa in the presence of fluids. Suitably-oriented pre-collisional fabrics were firstly exploited as zones of localized shearing internal to the KNC and subjected to metamorphic re-equilibration during shortening. Fold geometry during Caledonian thrusting was also controlled by the orientation of pre-Caledonian fabrics. SE-verging asymmetric folds were developed after minor tilting of pre-Caledonian upright folds with orogen-parallel hinge in the hinterland consistently with top-to-SE shearing. Shear-parallel folds displaying orogen-perpendicular hinge lines resulted from top-to-SE general shearing of pre-collisional upright folds showing pre-collisional orogen-perpendicular hinge lines. Caledonian metamorphism appears to have been accompanied by infiltration of radiogenic 40Ar-rich fluids, which affected the Ar isotopic system in synkinematic micas. | |
dc.language | EN | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.title | Structural and metamorphic inheritance controls strain partitioning during orogenic shortening (Kalak Nappe Complex, Norwegian Caledonides). | |
dc.type | Journal article | |
dc.creator.author | Ceccato, Alberto | |
dc.creator.author | Menegon, Luca | |
dc.creator.author | Warren, Clare | |
dc.creator.author | Halton, Alison M. | |
cristin.unitcode | 185,15,22,0 | |
cristin.unitname | Institutt for geofag | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1841488 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Structural Geology&rft.volume=136&rft.spage=&rft.date=2020 | |
dc.identifier.jtitle | Journal of Structural Geology | |
dc.identifier.volume | 136 | |
dc.identifier.doi | https://doi.org/10.1016/j.jsg.2020.104057 | |
dc.identifier.urn | URN:NBN:no-87971 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0191-8141 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/85124/1/Ceccato_et_al_JSG2020_self-archiving.pdf | |
dc.type.version | AcceptedVersion | |
cristin.articleid | 104057 | |