New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield
New U-Th-Pb zircon data (SIMS) from three intrusive phases of the Palaeoproterozoic Viterliden intrusion in the western Skellefte District, central Fennoscandian Shield, dates igneous emplacement in a narrow time interval at about 1.89 Ga. A locally occurring quartz-plagioclase porphyritic tonalite,...
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Luleå tekniska universitet, Geovetenskap och miljöteknik
2011
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-7476 https://doi.org/10.5194/se-2-205-2011 |
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ftluleatu:oai:DiVA.org:ltu-7476 2023-05-15T16:12:55+02:00 New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield Skyttä, Pietari Hermansson, Tobias Andersson, Jenny Whitehouse, Martin Weihed, Pär 2011 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-7476 https://doi.org/10.5194/se-2-205-2011 eng eng Luleå tekniska universitet, Geovetenskap och miljöteknik Boliden Mineral AB Sveriges Geologiska Undersökning Naturhistoriska Riksmuseet Solid Earth, 1869-9510, 2011, 2:, s. 205-217 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-7476 doi:10.5194/se-2-205-2011 ISI:000309884000009 Scopus 2-s2.0-84859111158 Local 5dec77bd-dbe4-4ebd-be72-c369706b77d6 info:eu-repo/semantics/openAccess Geology Geologi Article in journal info:eu-repo/semantics/article text 2011 ftluleatu https://doi.org/10.5194/se-2-205-2011 2022-10-25T20:54:34Z New U-Th-Pb zircon data (SIMS) from three intrusive phases of the Palaeoproterozoic Viterliden intrusion in the western Skellefte District, central Fennoscandian Shield, dates igneous emplacement in a narrow time interval at about 1.89 Ga. A locally occurring quartz-plagioclase porphyritic tonalite, here dated at 1889 ± 3 Ma, is considered the youngest of the intrusive units, based on the new age data and field evidence. This supports an existing interpretation of its fault-controlled emplacement after intrusion of the dominating hornblende-tonalite units, in this study dated at 1892 ± 3 Ma. The Viterliden magmatism was synchronous with the oldest units of the Jörn type early-orogenic intrusions in the eastern part of the district (1.89–1.88 Ga; cf. Gonzàles Roldán, 2010). A U-Pb zircon age for a felsic metavolcanic rock from the hanging-wall to the Kristineberg VMS deposit, immediately south of the Viterliden intrusion, is constrained at 1883 ± 6 Ma in this study. It provides a minimum age for the Kristineberg ore deposit and suggests contemporaneous igneous/volcanic activity throughout the Skellefte District. Furthermore, it supports the view that the Skellefte Group defines a laterally continuous belt throughout this "ore district". Tentative correlation of the 1889 ± 3 Ma quartz-plagioclase porphyritic tonalite with the Kristineberg "mine porphyry" suggests that these units are coeval at about 1.89 Ga. Based on the new age determinations, the Viterliden intrusion may equally well have intruded into or locally acted as a basement for the ore-hosting Skellefte Group volcanic rocks. Godkänd; 2011; 20111123 (piesky) Article in Journal/Newspaper Fennoscandian Luleå University of Technology Publications (DiVA) Kristineberg ENVELOPE(18.667,18.667,79.483,79.483) Solid Earth 2 2 205 217 |
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Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Geology Geologi |
spellingShingle |
Geology Geologi Skyttä, Pietari Hermansson, Tobias Andersson, Jenny Whitehouse, Martin Weihed, Pär New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield |
topic_facet |
Geology Geologi |
description |
New U-Th-Pb zircon data (SIMS) from three intrusive phases of the Palaeoproterozoic Viterliden intrusion in the western Skellefte District, central Fennoscandian Shield, dates igneous emplacement in a narrow time interval at about 1.89 Ga. A locally occurring quartz-plagioclase porphyritic tonalite, here dated at 1889 ± 3 Ma, is considered the youngest of the intrusive units, based on the new age data and field evidence. This supports an existing interpretation of its fault-controlled emplacement after intrusion of the dominating hornblende-tonalite units, in this study dated at 1892 ± 3 Ma. The Viterliden magmatism was synchronous with the oldest units of the Jörn type early-orogenic intrusions in the eastern part of the district (1.89–1.88 Ga; cf. Gonzàles Roldán, 2010). A U-Pb zircon age for a felsic metavolcanic rock from the hanging-wall to the Kristineberg VMS deposit, immediately south of the Viterliden intrusion, is constrained at 1883 ± 6 Ma in this study. It provides a minimum age for the Kristineberg ore deposit and suggests contemporaneous igneous/volcanic activity throughout the Skellefte District. Furthermore, it supports the view that the Skellefte Group defines a laterally continuous belt throughout this "ore district". Tentative correlation of the 1889 ± 3 Ma quartz-plagioclase porphyritic tonalite with the Kristineberg "mine porphyry" suggests that these units are coeval at about 1.89 Ga. Based on the new age determinations, the Viterliden intrusion may equally well have intruded into or locally acted as a basement for the ore-hosting Skellefte Group volcanic rocks. Godkänd; 2011; 20111123 (piesky) |
format |
Article in Journal/Newspaper |
author |
Skyttä, Pietari Hermansson, Tobias Andersson, Jenny Whitehouse, Martin Weihed, Pär |
author_facet |
Skyttä, Pietari Hermansson, Tobias Andersson, Jenny Whitehouse, Martin Weihed, Pär |
author_sort |
Skyttä, Pietari |
title |
New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield |
title_short |
New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield |
title_full |
New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield |
title_fullStr |
New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield |
title_full_unstemmed |
New zircon data supporting models of short-lived igneous activity at 1.89 Ga in the western Skellefte District, central Fennoscandian Shield |
title_sort |
new zircon data supporting models of short-lived igneous activity at 1.89 ga in the western skellefte district, central fennoscandian shield |
publisher |
Luleå tekniska universitet, Geovetenskap och miljöteknik |
publishDate |
2011 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-7476 https://doi.org/10.5194/se-2-205-2011 |
long_lat |
ENVELOPE(18.667,18.667,79.483,79.483) |
geographic |
Kristineberg |
geographic_facet |
Kristineberg |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
Solid Earth, 1869-9510, 2011, 2:, s. 205-217 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-7476 doi:10.5194/se-2-205-2011 ISI:000309884000009 Scopus 2-s2.0-84859111158 Local 5dec77bd-dbe4-4ebd-be72-c369706b77d6 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/se-2-205-2011 |
container_title |
Solid Earth |
container_volume |
2 |
container_issue |
2 |
container_start_page |
205 |
op_container_end_page |
217 |
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1765998521444466688 |