Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly
New data for intrusive meta-igneous rocks from the Southwest terrane of the Sør Rondane Mountains confirm the view that this is a juvenile oceanic arc terrane, with the main phase of subduction-related magmatic activity around 995–975 Ma. Younger magmatism (960–925 Ma) is more varied: a high Sr/Y (‘...
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Online Access: | https://hdl.handle.net/20.500.11937/14249 https://doi.org/10.1016/j.precamres.2014.10.014 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/14249 2023-06-11T04:05:11+02:00 Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly Elburg, M. Jacobs, J. Andersen, T. Clark, Christopher Läufer, A. Ruppel, A. Krohne, N. Damaske, D. 2014 restricted https://hdl.handle.net/20.500.11937/14249 https://doi.org/10.1016/j.precamres.2014.10.014 unknown Elsevier BV http://hdl.handle.net/20.500.11937/14249 doi:10.1016/j.precamres.2014.10.014 Antarctica Oceanic arc Rodinia Zircon U–Pb Lu–Hfa Gondwana Journal Article 2014 ftcurtin https://doi.org/20.500.11937/1424910.1016/j.precamres.2014.10.014 2023-05-30T19:27:21Z New data for intrusive meta-igneous rocks from the Southwest terrane of the Sør Rondane Mountains confirm the view that this is a juvenile oceanic arc terrane, with the main phase of subduction-related magmatic activity around 995–975 Ma. Younger magmatism (960–925 Ma) is more varied: a high Sr/Y (‘adakitic’) suite is present, as well as high-Ti mafic dykes, and one sample of A-type granite. This is interpreted as reflecting the end of subduction. The occasional presence of Archaean inherited zircons suggests proximity of Sør Rondane to an older continental nucleus from which detritus was shed. Although the ‘meta-igneous sector’ appears to be unique in representing a juvenile oceanic arc terrane, igneous ages and isotopic compositions around 1000–900 Ma suggest a broad coherence between outcrops ranging from Schirmacher Oasis (11° E) to Yamato Mts (35° E). This area seems unrelated to the slightly older, and isotopically and geochemically more enriched Mesoproterozoic rocks of central and western Dronning Maud Land. A closer relation appears to exist with Sri Lanka-India-Madagascar during the earliest Neoproterozoic than with southern Africa. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land East Antarctica Curtin University: espace Dronning Maud Land East Antarctica Sør Rondane Mountains ENVELOPE(25.000,25.000,-72.000,-72.000) Sør-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) Precambrian Research 259 189 206 |
institution |
Open Polar |
collection |
Curtin University: espace |
op_collection_id |
ftcurtin |
language |
unknown |
topic |
Antarctica Oceanic arc Rodinia Zircon U–Pb Lu–Hfa Gondwana |
spellingShingle |
Antarctica Oceanic arc Rodinia Zircon U–Pb Lu–Hfa Gondwana Elburg, M. Jacobs, J. Andersen, T. Clark, Christopher Läufer, A. Ruppel, A. Krohne, N. Damaske, D. Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly |
topic_facet |
Antarctica Oceanic arc Rodinia Zircon U–Pb Lu–Hfa Gondwana |
description |
New data for intrusive meta-igneous rocks from the Southwest terrane of the Sør Rondane Mountains confirm the view that this is a juvenile oceanic arc terrane, with the main phase of subduction-related magmatic activity around 995–975 Ma. Younger magmatism (960–925 Ma) is more varied: a high Sr/Y (‘adakitic’) suite is present, as well as high-Ti mafic dykes, and one sample of A-type granite. This is interpreted as reflecting the end of subduction. The occasional presence of Archaean inherited zircons suggests proximity of Sør Rondane to an older continental nucleus from which detritus was shed. Although the ‘meta-igneous sector’ appears to be unique in representing a juvenile oceanic arc terrane, igneous ages and isotopic compositions around 1000–900 Ma suggest a broad coherence between outcrops ranging from Schirmacher Oasis (11° E) to Yamato Mts (35° E). This area seems unrelated to the slightly older, and isotopically and geochemically more enriched Mesoproterozoic rocks of central and western Dronning Maud Land. A closer relation appears to exist with Sri Lanka-India-Madagascar during the earliest Neoproterozoic than with southern Africa. |
format |
Article in Journal/Newspaper |
author |
Elburg, M. Jacobs, J. Andersen, T. Clark, Christopher Läufer, A. Ruppel, A. Krohne, N. Damaske, D. |
author_facet |
Elburg, M. Jacobs, J. Andersen, T. Clark, Christopher Läufer, A. Ruppel, A. Krohne, N. Damaske, D. |
author_sort |
Elburg, M. |
title |
Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly |
title_short |
Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly |
title_full |
Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly |
title_fullStr |
Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly |
title_full_unstemmed |
Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly |
title_sort |
early neoproterozoic metagabbro-tonalite-trondhjemite of sør rondane (east antarctica): implications for supercontinent assembly |
publisher |
Elsevier BV |
publishDate |
2014 |
url |
https://hdl.handle.net/20.500.11937/14249 https://doi.org/10.1016/j.precamres.2014.10.014 |
long_lat |
ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
Dronning Maud Land East Antarctica Sør Rondane Mountains Sør-Rondane Yamato |
geographic_facet |
Dronning Maud Land East Antarctica Sør Rondane Mountains Sør-Rondane Yamato |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica |
op_relation |
http://hdl.handle.net/20.500.11937/14249 doi:10.1016/j.precamres.2014.10.014 |
op_doi |
https://doi.org/20.500.11937/1424910.1016/j.precamres.2014.10.014 |
container_title |
Precambrian Research |
container_volume |
259 |
container_start_page |
189 |
op_container_end_page |
206 |
_version_ |
1768372710415532032 |