New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica
The Sør Rondane Mountains (SRM) in eastern Dronning Maud Land (DML) are located in an area, where two apparent Pan-African (650–520 Ma) orogenic mobile belts appear to intersect, the East African-Antarctic Orogen and the Kuunga Orogen. Hence, a better understanding of the tectonic structure of the S...
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ftawi:oai:epic.awi.de:35675 2024-09-09T19:10:21+00:00 New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica Mieth, Matthias Jacobs, Joachim Ruppel, Antonia Damaske, Detlef Läufer, Andreas Jokat, Wilfried 2014-05 https://epic.awi.de/id/eprint/35675/ https://hdl.handle.net/10013/epic.43655 unknown ELSEVIER SCIENCE BV Mieth, M. , Jacobs, J. , Ruppel, A. , Damaske, D. , Läufer, A. and Jokat, W. orcid:0000-0002-7793-5854 (2014) New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica , Precambrian Research, 245 , pp. 174-185 . doi:10.1016/j.precamres.2014.02.009 <https://doi.org/10.1016/j.precamres.2014.02.009> , hdl:10013/epic.43655 EPIC3Precambrian Research, ELSEVIER SCIENCE BV, 245, pp. 174-185, ISSN: 0301-9268 Article peerRev 2014 ftawi https://doi.org/10.1016/j.precamres.2014.02.009 2024-06-24T04:09:53Z The Sør Rondane Mountains (SRM) in eastern Dronning Maud Land (DML) are located in an area, where two apparent Pan-African (650–520 Ma) orogenic mobile belts appear to intersect, the East African-Antarctic Orogen and the Kuunga Orogen. Hence, a better understanding of the tectonic structure of the Sør Rondane region is an important key for unravelling the complex geodynamic evolution of the eastern DML and adjacent regions of East Antarctica during the Late Neoproterozoic/Early Palaeozoic amalgamation of Gondwana. The SRM were recently (2011–2012) aerogeophysically investigated with a 5 km flight line spacing, covering a total area of ∼140,000 km2. The aeromagnetic data are correlated with ground-based magnetic susceptibility measurements and geological field data and allow to project tectonic terranes and individual structures into ice-covered areas. Magnetic anomalies and basement foliation trends are collinear in areas dominated by simple shear deformation, whereas an area of large-scale refolding correlates with a subdued small-scale broken magnetic anomaly pattern. The latter area can be regarded as a distinct tectonic domain, the central Sør Rondane corridor. It magnetically separates the SRM into an eastern, a central, and a western portion. This subdivision is presumably related to late Pan-African extensional tectonics and suggests that such a tectonic regime may play a larger role than previously assumed. Voluminous late Pan-African granitoids, which are mainly undeformed, correlate with positive magnetic anomalies between +30 and +80 nT, while a strong magnetic high (+680 nT) near the granitic intrusion at Dufekfjellet is caused by a highly magnetised enigmatic body. The recently discovered prominent magnetic anomaly province of southeastern DML continues into the southern part of the Sør Rondane region, where only a few outcrops are exposed. Findings at these westernmost nunataks of the SRM indicate that the subdued magnetic anomaly pattern of this southeastern DML province is most likely caused by ... Article in Journal/Newspaper Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica ice covered areas Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic East Antarctica Dronning Maud Land Sør-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) Sør Rondane Mountains ENVELOPE(25.000,25.000,-72.000,-72.000) Dufekfjellet ENVELOPE(24.700,24.700,-72.217,-72.217) Precambrian Research 245 174 185 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The Sør Rondane Mountains (SRM) in eastern Dronning Maud Land (DML) are located in an area, where two apparent Pan-African (650–520 Ma) orogenic mobile belts appear to intersect, the East African-Antarctic Orogen and the Kuunga Orogen. Hence, a better understanding of the tectonic structure of the Sør Rondane region is an important key for unravelling the complex geodynamic evolution of the eastern DML and adjacent regions of East Antarctica during the Late Neoproterozoic/Early Palaeozoic amalgamation of Gondwana. The SRM were recently (2011–2012) aerogeophysically investigated with a 5 km flight line spacing, covering a total area of ∼140,000 km2. The aeromagnetic data are correlated with ground-based magnetic susceptibility measurements and geological field data and allow to project tectonic terranes and individual structures into ice-covered areas. Magnetic anomalies and basement foliation trends are collinear in areas dominated by simple shear deformation, whereas an area of large-scale refolding correlates with a subdued small-scale broken magnetic anomaly pattern. The latter area can be regarded as a distinct tectonic domain, the central Sør Rondane corridor. It magnetically separates the SRM into an eastern, a central, and a western portion. This subdivision is presumably related to late Pan-African extensional tectonics and suggests that such a tectonic regime may play a larger role than previously assumed. Voluminous late Pan-African granitoids, which are mainly undeformed, correlate with positive magnetic anomalies between +30 and +80 nT, while a strong magnetic high (+680 nT) near the granitic intrusion at Dufekfjellet is caused by a highly magnetised enigmatic body. The recently discovered prominent magnetic anomaly province of southeastern DML continues into the southern part of the Sør Rondane region, where only a few outcrops are exposed. Findings at these westernmost nunataks of the SRM indicate that the subdued magnetic anomaly pattern of this southeastern DML province is most likely caused by ... |
format |
Article in Journal/Newspaper |
author |
Mieth, Matthias Jacobs, Joachim Ruppel, Antonia Damaske, Detlef Läufer, Andreas Jokat, Wilfried |
spellingShingle |
Mieth, Matthias Jacobs, Joachim Ruppel, Antonia Damaske, Detlef Läufer, Andreas Jokat, Wilfried New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica |
author_facet |
Mieth, Matthias Jacobs, Joachim Ruppel, Antonia Damaske, Detlef Läufer, Andreas Jokat, Wilfried |
author_sort |
Mieth, Matthias |
title |
New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica |
title_short |
New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica |
title_full |
New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica |
title_fullStr |
New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica |
title_full_unstemmed |
New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica |
title_sort |
new detailed aeromagnetic and geological data of eastern dronning maud land: implications for refining the tectonic and structural framework of sør rondane, east antarctica |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35675/ https://hdl.handle.net/10013/epic.43655 |
long_lat |
ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(24.700,24.700,-72.217,-72.217) |
geographic |
Antarctic East Antarctica Dronning Maud Land Sør-Rondane Sør Rondane Mountains Dufekfjellet |
geographic_facet |
Antarctic East Antarctica Dronning Maud Land Sør-Rondane Sør Rondane Mountains Dufekfjellet |
genre |
Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica ice covered areas |
genre_facet |
Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica ice covered areas |
op_source |
EPIC3Precambrian Research, ELSEVIER SCIENCE BV, 245, pp. 174-185, ISSN: 0301-9268 |
op_relation |
Mieth, M. , Jacobs, J. , Ruppel, A. , Damaske, D. , Läufer, A. and Jokat, W. orcid:0000-0002-7793-5854 (2014) New detailed aeromagnetic and geological data of eastern Dronning Maud Land: Implications for refining the tectonic and structural framework of Sør Rondane, East Antarctica , Precambrian Research, 245 , pp. 174-185 . doi:10.1016/j.precamres.2014.02.009 <https://doi.org/10.1016/j.precamres.2014.02.009> , hdl:10013/epic.43655 |
op_doi |
https://doi.org/10.1016/j.precamres.2014.02.009 |
container_title |
Precambrian Research |
container_volume |
245 |
container_start_page |
174 |
op_container_end_page |
185 |
_version_ |
1809825262376845312 |