New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion
The Uitkomst Complex is considered to be coeval with, and genetically linked to the Rustenburg Layered Suite (RLS) of the Bushveld Large Igneous Province. This study reports new paleomagnetic, geochemical and geochronological results from the Uitkomst Complex and a crosscutting dyke at the Nkomati M...
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Taylor & Francis
2016
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ftulundlup:oai:lup.lub.lu.se:f8f7494a-f5aa-4bb0-9a0c-3fc7de2979c8 2024-04-21T08:02:21+00:00 New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion Wabo, H. Olsson, Johan de Kock, M. O. Humbert, F. Söderlund, U. Klausen, M. B. 2016-01-02 https://lup.lub.lu.se/record/f8f7494a-f5aa-4bb0-9a0c-3fc7de2979c8 https://doi.org/10.1080/11035897.2015.1098726 eng eng Taylor & Francis https://lup.lub.lu.se/record/f8f7494a-f5aa-4bb0-9a0c-3fc7de2979c8 http://dx.doi.org/10.1080/11035897.2015.1098726 scopus:84959094779 wos:000371812700011 GFF; 138(1), pp 152-163 (2016) ISSN: 1103-5897 Geology Bushveld magmatism Kaapvaal Craton paleomagnetism Uitkomst Complex U–Pb baddeleyite dating contributiontojournal/article info:eu-repo/semantics/article text 2016 ftulundlup https://doi.org/10.1080/11035897.2015.1098726 2024-03-27T15:02:47Z The Uitkomst Complex is considered to be coeval with, and genetically linked to the Rustenburg Layered Suite (RLS) of the Bushveld Large Igneous Province. This study reports new paleomagnetic, geochemical and geochronological results from the Uitkomst Complex and a crosscutting dyke at the Nkomati Mine. Primary magnetisations for the complex and the dyke are statistically indistinguishable. This, together with the geochemical signature of the dyke, suggests a late-magmatic link with the Uitkomst Complex. A Virtual Geomagnetic Pole calculated for the complex at Longitude 28.7°N and Latitude 58.5°E (dp = 6.2; dm = 9.4; N = 3) differs from the 1900 Ma and younger-aged poles for the Kaapvaal Craton. It, however, shares similarities with the poles from the 2058 to 2054 Ma RLS and other ~2.0 Ga paleopoles for the Kaapvaal Craton. Moreover, a new U–Pb baddeleyite age of 2054 ± 7 Ma given by a coarse-grained gabbroic sample from Nkomati’s underground mine provides a minimum age constraint on the crystallisation of the Uitkomst Complex. This date is nominally older than the 207Pb/206Pb zircon age of 2044 ± 8 Ma previously reported for this complex, and also near identical to the new age of 2054.89 ± 0.37 Ma from the Critical Zone of the RLS. Here, it is suggested that the Uitkomst Complex was emplaced at the same time as, if not before the Critical Zone. Data presented here have bearings on the location of the Uitkomst Complex in the time frame model recently proposed for the Bushveld magmatism. Article in Journal/Newspaper Geomagnetic Pole Lund University Publications (LUP) GFF 138 1 152 163 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology Bushveld magmatism Kaapvaal Craton paleomagnetism Uitkomst Complex U–Pb baddeleyite dating |
spellingShingle |
Geology Bushveld magmatism Kaapvaal Craton paleomagnetism Uitkomst Complex U–Pb baddeleyite dating Wabo, H. Olsson, Johan de Kock, M. O. Humbert, F. Söderlund, U. Klausen, M. B. New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion |
topic_facet |
Geology Bushveld magmatism Kaapvaal Craton paleomagnetism Uitkomst Complex U–Pb baddeleyite dating |
description |
The Uitkomst Complex is considered to be coeval with, and genetically linked to the Rustenburg Layered Suite (RLS) of the Bushveld Large Igneous Province. This study reports new paleomagnetic, geochemical and geochronological results from the Uitkomst Complex and a crosscutting dyke at the Nkomati Mine. Primary magnetisations for the complex and the dyke are statistically indistinguishable. This, together with the geochemical signature of the dyke, suggests a late-magmatic link with the Uitkomst Complex. A Virtual Geomagnetic Pole calculated for the complex at Longitude 28.7°N and Latitude 58.5°E (dp = 6.2; dm = 9.4; N = 3) differs from the 1900 Ma and younger-aged poles for the Kaapvaal Craton. It, however, shares similarities with the poles from the 2058 to 2054 Ma RLS and other ~2.0 Ga paleopoles for the Kaapvaal Craton. Moreover, a new U–Pb baddeleyite age of 2054 ± 7 Ma given by a coarse-grained gabbroic sample from Nkomati’s underground mine provides a minimum age constraint on the crystallisation of the Uitkomst Complex. This date is nominally older than the 207Pb/206Pb zircon age of 2044 ± 8 Ma previously reported for this complex, and also near identical to the new age of 2054.89 ± 0.37 Ma from the Critical Zone of the RLS. Here, it is suggested that the Uitkomst Complex was emplaced at the same time as, if not before the Critical Zone. Data presented here have bearings on the location of the Uitkomst Complex in the time frame model recently proposed for the Bushveld magmatism. |
format |
Article in Journal/Newspaper |
author |
Wabo, H. Olsson, Johan de Kock, M. O. Humbert, F. Söderlund, U. Klausen, M. B. |
author_facet |
Wabo, H. Olsson, Johan de Kock, M. O. Humbert, F. Söderlund, U. Klausen, M. B. |
author_sort |
Wabo, H. |
title |
New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion |
title_short |
New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion |
title_full |
New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion |
title_fullStr |
New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion |
title_full_unstemmed |
New U–Pb age and paleomagnetic constraints from the Uitkomst Complex, South Africa : clues to the timing of intrusion |
title_sort |
new u–pb age and paleomagnetic constraints from the uitkomst complex, south africa : clues to the timing of intrusion |
publisher |
Taylor & Francis |
publishDate |
2016 |
url |
https://lup.lub.lu.se/record/f8f7494a-f5aa-4bb0-9a0c-3fc7de2979c8 https://doi.org/10.1080/11035897.2015.1098726 |
genre |
Geomagnetic Pole |
genre_facet |
Geomagnetic Pole |
op_source |
GFF; 138(1), pp 152-163 (2016) ISSN: 1103-5897 |
op_relation |
https://lup.lub.lu.se/record/f8f7494a-f5aa-4bb0-9a0c-3fc7de2979c8 http://dx.doi.org/10.1080/11035897.2015.1098726 scopus:84959094779 wos:000371812700011 |
op_doi |
https://doi.org/10.1080/11035897.2015.1098726 |
container_title |
GFF |
container_volume |
138 |
container_issue |
1 |
container_start_page |
152 |
op_container_end_page |
163 |
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1796942551304896512 |