| _version_ | 1867170468500340736 |
|---|---|
| author | Owada, Masaaki Baba, Sotaro Läufer, Andreas Elvevold, Synnøve Shiraishi, Kazuyuki Jacobs, Joachim |
| author_facet | Owada, Masaaki Baba, Sotaro Läufer, Andreas Elvevold, Synnøve Shiraishi, Kazuyuki Jacobs, Joachim |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_849089 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Representative and whole rock analyses of rocks from Filchnerfjella, Antarctica Owada, Masaaki Baba, Sotaro Läufer, Andreas Elvevold, Synnøve Shiraishi, Kazuyuki Jacobs, Joachim Dronning Maud Land, Antarctica; Filchnerfjella; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; ROCK; Rock sample; SPP1158 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. |
| title | Representative and whole rock analyses of rocks from Filchnerfjella, Antarctica |
| topic | Dronning Maud Land, Antarctica; Filchnerfjella; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; ROCK; Rock sample; SPP1158 |
| url | https://doi.org/10.1594/PANGAEA.849089 |