(Table 1) Magnetic susceptibility readings in the western part of the Sør Rondane Montains ...

• Main Authors: Mieth, Matthias, Jacobs, Joachim, Ruppel, Antonia, Damaske, Detlef, Läufer, Andreas, Jokat, Wilfried
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Terrain; Rock type; Method comment; Number of observations; Magnetic susceptibility; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Antarctica; DML; Dronning Maud Land; East Antarctica; Sea ice; ice covered areas
• Online Access: https://dx.doi.org/10.1594/pangaea.858467; https://doi.pangaea.de/10.1594/PANGAEA.858467

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 ... : Mean values of each location were grouped for lithology and tectonic terrane in Sør Rondane and subsequently averaged. Relatively high values have been measured for grey gneisses, granulites, and amphibolites, while metasedimentary rocks show very low values in all terranes. Readings at granitoids show a wide range of magnetic susceptibilities, with a tendency to higher values for the older intrusions (group I and II). ...