Linking the basement geology along the Africa-South America coasts in the South Atlantic
The match of geological units of the dissected Kaoko-Dom Feliciano-Gariep orogenic system exposed along the coasts of the South Atlantic is poorly understood. Two suites of intrusive rocks crop out in the Angra Fria Bay area, a part of the Coastal Terrane of the Kaoko Belt in Namibia. U–Pb zircon da...
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Online Access: | https://hdl.handle.net/1956/15728 https://doi.org/10.1016/j.precamres.2016.05.011 |
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ftunivbergen:oai:bora.uib.no:1956/15728 2023-05-15T18:21:08+02:00 Linking the basement geology along the Africa-South America coasts in the South Atlantic Konopasek, Jiri Slama, Jiri Košler, Jan 2017-02-27T09:54:39Z application/pdf https://hdl.handle.net/1956/15728 https://doi.org/10.1016/j.precamres.2016.05.011 eng eng Elsevier urn:issn:0301-9268 https://hdl.handle.net/1956/15728 https://doi.org/10.1016/j.precamres.2016.05.011 cristin:1370915 Copyright 2016 2016 Elsevier B.V. All rights reserved. Precambrian Research Gondwana reconstruction South Atlantic Ocean Plate tectonics Kaoko Belt Dom Feliciano Belt Peer reviewed Journal article 2017 ftunivbergen https://doi.org/10.1016/j.precamres.2016.05.011 2023-03-14T17:44:49Z The match of geological units of the dissected Kaoko-Dom Feliciano-Gariep orogenic system exposed along the coasts of the South Atlantic is poorly understood. Two suites of intrusive rocks crop out in the Angra Fria Bay area, a part of the Coastal Terrane of the Kaoko Belt in Namibia. U–Pb zircon dating of three samples from the younger suite provided ages of 574 ± 6, 586 ± 3 and 584 ± 7 Ma, similar to the ages of the oldest syn-collisional granitoids in the area. Three samples of the older suite gave ages of 626 ± 5, 622 ± 5 and 620 ± 6 Ma respectively, which have not previously been recorded in intrusive rocks of the Kaoko Belt, but which coincide with those from the Florianópolis Batholith in the Dom Feliciano Belt in Brazil. Zircon ages, Sr–Nd isotopic composition and tectonic position of these granitoids suggest that this magmatic complex could be a continuation of the Florianópolis Batholith on the African side of the Atlantic Ocean. Consequently, the Angra Fria intrusions and the Florianópolis Batholith may represent suitable localities for spatial reconstruction of the Gondwana supercontinent in the area, where the robust pre-Mesozoic connecting points are scarce. acceptedVersion Article in Journal/Newspaper South Atlantic Ocean University of Bergen: Bergen Open Research Archive (BORA-UiB) Precambrian Research 280 221 230 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Gondwana reconstruction South Atlantic Ocean Plate tectonics Kaoko Belt Dom Feliciano Belt |
spellingShingle |
Gondwana reconstruction South Atlantic Ocean Plate tectonics Kaoko Belt Dom Feliciano Belt Konopasek, Jiri Slama, Jiri Košler, Jan Linking the basement geology along the Africa-South America coasts in the South Atlantic |
topic_facet |
Gondwana reconstruction South Atlantic Ocean Plate tectonics Kaoko Belt Dom Feliciano Belt |
description |
The match of geological units of the dissected Kaoko-Dom Feliciano-Gariep orogenic system exposed along the coasts of the South Atlantic is poorly understood. Two suites of intrusive rocks crop out in the Angra Fria Bay area, a part of the Coastal Terrane of the Kaoko Belt in Namibia. U–Pb zircon dating of three samples from the younger suite provided ages of 574 ± 6, 586 ± 3 and 584 ± 7 Ma, similar to the ages of the oldest syn-collisional granitoids in the area. Three samples of the older suite gave ages of 626 ± 5, 622 ± 5 and 620 ± 6 Ma respectively, which have not previously been recorded in intrusive rocks of the Kaoko Belt, but which coincide with those from the Florianópolis Batholith in the Dom Feliciano Belt in Brazil. Zircon ages, Sr–Nd isotopic composition and tectonic position of these granitoids suggest that this magmatic complex could be a continuation of the Florianópolis Batholith on the African side of the Atlantic Ocean. Consequently, the Angra Fria intrusions and the Florianópolis Batholith may represent suitable localities for spatial reconstruction of the Gondwana supercontinent in the area, where the robust pre-Mesozoic connecting points are scarce. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Konopasek, Jiri Slama, Jiri Košler, Jan |
author_facet |
Konopasek, Jiri Slama, Jiri Košler, Jan |
author_sort |
Konopasek, Jiri |
title |
Linking the basement geology along the Africa-South America coasts in the South Atlantic |
title_short |
Linking the basement geology along the Africa-South America coasts in the South Atlantic |
title_full |
Linking the basement geology along the Africa-South America coasts in the South Atlantic |
title_fullStr |
Linking the basement geology along the Africa-South America coasts in the South Atlantic |
title_full_unstemmed |
Linking the basement geology along the Africa-South America coasts in the South Atlantic |
title_sort |
linking the basement geology along the africa-south america coasts in the south atlantic |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/15728 https://doi.org/10.1016/j.precamres.2016.05.011 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Precambrian Research |
op_relation |
urn:issn:0301-9268 https://hdl.handle.net/1956/15728 https://doi.org/10.1016/j.precamres.2016.05.011 cristin:1370915 |
op_rights |
Copyright 2016 2016 Elsevier B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.precamres.2016.05.011 |
container_title |
Precambrian Research |
container_volume |
280 |
container_start_page |
221 |
op_container_end_page |
230 |
_version_ |
1766200241482104832 |