Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233]
Present-day exposures of ancient faults represent only the end result of the faults’ often protracted and heterogeneous histories. Here we apply K–Ar dating of synkinematic illite/muscovite to constrain the timing of the complete temporal evolution of a complex, multiply-reactivated brittle–ductile...
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Online Access: | http://hdl.handle.net/11585/569747 https://doi.org/10.1016/j.epsl.2014.11.013 http://www.sciencedirect.com/science/journal/0012821X/321-322 |
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ftunibolognairis:oai:cris.unibo.it:11585/569747 2024-04-14T08:16:37+00:00 Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] Torgersen, E. Zwingmann, H. Harris, C. VIOLA, GIULIO Torgersen, E. Viola, Giulio Zwingmann, H. Harris, C. 2015 STAMPA http://hdl.handle.net/11585/569747 https://doi.org/10.1016/j.epsl.2014.11.013 http://www.sciencedirect.com/science/journal/0012821X/321-322 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000349196400021 volume:410 firstpage:212 lastpage:224 numberofpages:13 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11585/569747 doi:10.1016/j.epsl.2014.11.013 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84919898242 http://www.sciencedirect.com/science/journal/0012821X/321-322 Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science info:eu-repo/semantics/article 2015 ftunibolognairis https://doi.org/10.1016/j.epsl.2014.11.013 2024-03-21T17:39:04Z Present-day exposures of ancient faults represent only the end result of the faults’ often protracted and heterogeneous histories. Here we apply K–Ar dating of synkinematic illite/muscovite to constrain the timing of the complete temporal evolution of a complex, multiply-reactivated brittle–ductile fault, the Kvenklubben Fault in northern Norway. All obtained ages vary as a function of grain size. Geologically significant events are identified principally on the basis of detailed structural analysis presented in a companion paper (Torgersen and Viola, 2014). Faulting initiated at 531 ±11 Ma, but most strain was accommodated during Caledonian compression at 445 ±9 Ma. The fault was reactivated extensionally at 121 ±5 Ma. C and O isotopic composition of carbonates and silicates in the fault rocks demonstrates that mineral authigenesis was linked to wall–rock disintegration through dolomite decarbonation and metabasalt carbonation. We suggest that the commonly observed case of age decreasing with grain size in K–Ar and 40Ar/39Ar dating of brittle fault rocks can be interpreted as a consequence of mixing between two end-member illite/muscovite generations: an authigenic and a protolithic, in which the finest authigenic grains constrain the timing of the last faulting increment. Integrating detailed structural analysis with age dating is the key towards a better understanding of fault architecture development and the temporal evolution of strain localization and deformation mechanisms. Article in Journal/Newspaper Northern Norway IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Kvenklubben ENVELOPE(23.637,23.637,70.405,70.405) Norway Torgersen ENVELOPE(-64.074,-64.074,-64.773,-64.773) Earth and Planetary Science Letters 410 211 |
institution |
Open Polar |
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IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science |
spellingShingle |
Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Torgersen, E. Zwingmann, H. Harris, C. VIOLA, GIULIO Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] |
topic_facet |
Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science |
description |
Present-day exposures of ancient faults represent only the end result of the faults’ often protracted and heterogeneous histories. Here we apply K–Ar dating of synkinematic illite/muscovite to constrain the timing of the complete temporal evolution of a complex, multiply-reactivated brittle–ductile fault, the Kvenklubben Fault in northern Norway. All obtained ages vary as a function of grain size. Geologically significant events are identified principally on the basis of detailed structural analysis presented in a companion paper (Torgersen and Viola, 2014). Faulting initiated at 531 ±11 Ma, but most strain was accommodated during Caledonian compression at 445 ±9 Ma. The fault was reactivated extensionally at 121 ±5 Ma. C and O isotopic composition of carbonates and silicates in the fault rocks demonstrates that mineral authigenesis was linked to wall–rock disintegration through dolomite decarbonation and metabasalt carbonation. We suggest that the commonly observed case of age decreasing with grain size in K–Ar and 40Ar/39Ar dating of brittle fault rocks can be interpreted as a consequence of mixing between two end-member illite/muscovite generations: an authigenic and a protolithic, in which the finest authigenic grains constrain the timing of the last faulting increment. Integrating detailed structural analysis with age dating is the key towards a better understanding of fault architecture development and the temporal evolution of strain localization and deformation mechanisms. |
author2 |
Torgersen, E. Viola, Giulio Zwingmann, H. Harris, C. |
format |
Article in Journal/Newspaper |
author |
Torgersen, E. Zwingmann, H. Harris, C. VIOLA, GIULIO |
author_facet |
Torgersen, E. Zwingmann, H. Harris, C. VIOLA, GIULIO |
author_sort |
Torgersen, E. |
title |
Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] |
title_short |
Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] |
title_full |
Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] |
title_fullStr |
Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] |
title_full_unstemmed |
Erratum to 'Structural and temporal evolution of a reactivated brittle-ductile fault - Part II: Timing of fault initiation and reactivation by K-Ar dating of synkinematic illite/muscovite' [Earth Planet. Sci. Lett. 407 (2014) 221-233] |
title_sort |
erratum to 'structural and temporal evolution of a reactivated brittle-ductile fault - part ii: timing of fault initiation and reactivation by k-ar dating of synkinematic illite/muscovite' [earth planet. sci. lett. 407 (2014) 221-233] |
publishDate |
2015 |
url |
http://hdl.handle.net/11585/569747 https://doi.org/10.1016/j.epsl.2014.11.013 http://www.sciencedirect.com/science/journal/0012821X/321-322 |
long_lat |
ENVELOPE(23.637,23.637,70.405,70.405) ENVELOPE(-64.074,-64.074,-64.773,-64.773) |
geographic |
Kvenklubben Norway Torgersen |
geographic_facet |
Kvenklubben Norway Torgersen |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000349196400021 volume:410 firstpage:212 lastpage:224 numberofpages:13 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11585/569747 doi:10.1016/j.epsl.2014.11.013 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84919898242 http://www.sciencedirect.com/science/journal/0012821X/321-322 |
op_doi |
https://doi.org/10.1016/j.epsl.2014.11.013 |
container_title |
Earth and Planetary Science Letters |
container_volume |
410 |
container_start_page |
211 |
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1796315326358487040 |