Representative and whole rock analyses of rocks from Filchnerfjella, Antarctica ...

• Main Authors: Owada, Masaaki, Baba, Sotaro, Läufer, Andreas, Elvevold, Synnøve, Shiraishi, Kazuyuki, Jacobs, Joachim
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2003
• Subjects: Rock sample; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Andreas; Antarctic; Arctic; Dronning Maud Land; East Antarctica; Elvevold; Filchnerfjella; Norway; Antarc*; Antarctica; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.849089; https://doi.pangaea.de/10.1594/PANGAEA.849089

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 ... : Supplement to: Owada, Masaaki; Baba, Sotaro; Läufer, Andreas; Elvevold, Synnøve; Shiraishi, Kazuyuki; Jacobs, Joachim (2003): Geology of Filchnerfjella in Dronning Maud Land: A preliminary report of Japan-Norway-Germany Joint Geological Investigation. Polar Geoscience, 16, 108-136 ...