Owada, Masaaki; Baba, Sotaro; Läufer, Andreas; Elvevold, Synnøve; Shiraishi, Kazuyuki; Jacobs, Joachim (2003): Representative and whole rock analyses of rocks from Filchnerfjella, Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.849089, Supplement to: Owada, M et al. (2003): Geology of Filchnerfjella in Dronning Maud Land: A preliminary report of Japan-Norway-Germany Joint Geological Investigation. Polar Geoscience, 16, 108-136
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Abstract:
The geological history of Filchnerfjella and surrounding areas (2°E to 8°E) in central Dronning Maud Land, East Antarctica, is constructed from metamorphic and igneous petrology, and structural investigations. The geology of Filchner-fjella consists mainly of metamorphic rocks accompanied by intrusive rocks. Two stages of metamorphism can be recognized in this area. The earlier stage metamorphism is defined as a porphyroblast stage (garnet, hornblende, and sillimanite stable), and the later one is recognized as a symplectic stage (orthopyroxene and cordieritestable). Taking metamorphic textures and geothermobarometries into account, the rocks experienced an early high-P/medium-T followed by a low-P and high-T stage. Partial melting took place during the low-P/high-T stage, because probable melt of leucocratic gneiss contains cordierite. The field relationships and petrography of the syenite at Filchnerfjella are similar to those of post-tectonic plutons from central Dronning Maud Land, and most of the post-tectonic intrusive rocks have within-plate geochemical features. The structural history in Filchnerfjella and surrounding areas can be divided into the Pan-African stage and the Meso to Cenozoic stage that relates to the break-up of Gondwana.
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Latitude: -72.000000 * Longitude: 7.500000
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License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Owada, M; Baba, S; Läufer, A et al. (2003): (Table 2) Representative mineral analyses of Garnet-orthopyroxene mafic gneiss, Filchnerfjella. https://doi.org/10.1594/PANGAEA.849087
- Owada, M; Baba, S; Läufer, A et al. (2003): (Table 3) Major and trace element analyses of intrusive rocks from Filchnerfjella. https://doi.org/10.1594/PANGAEA.849088