Geanulite-facies rocks in several islands west of Langhovde, East Antarctica
スポンサーリンク
概要
- 論文の詳細を見る
Several islands in the west of Langhovde (69°08′-69°17′S, 39°24′-39°36′E), East Antarctica, are underlain by granulite-facies metamorphic rocks. Among them pyroxene gneiss is the most dominant rock type. It includes garnet-bearing layers, in which orthopyroxene, clinopyroxene, garnet and hornblende are present in equilibrium. These minerals are generally rich in Fe, reflecting the bulk chemistry of the host rocks. Especially, the orthopyroxenes in two specimens of pyroxene gneiss have Fe/(Fe+Mn+Mg) ratios higher than 0.9. The stability field of such Fe-rich orthopyroxenes has been estimated to be more than 9kb at 800℃. On the other hand, the calculated results by the geothermometers using orthopyroxene-clinopyroxene and garnet-clinopyroxene pairs and the geobarometers using a garnet-orthopyroxene-plagioclase association range 750-800℃ and 7-8kb.
- 国立極地研究所の論文
著者
-
Katsushima Takayoshi
Department Of Geology And Mineralogy Faculty Of Science Hokkaido University
-
Katsushima T
Department Of Geology And Mineralogy Faculty Of Science Hokkaido University
関連論文
- Volcanic ash in dirt layers from the Allan Hills bare ice area in Victoria Land, Antarctica
- Search and collection of Yamato meteorites in the 1982-83 field season,Antarctica
- Profiling of Antarctic sea ice thickness and relevant sea ice structure near Syowa Station by impulse radar (abstract)
- Snow surface features of the Shirase Glacier drainage basin, Antarctica (abstract)
- Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica
- Dirt layers and atmospheric transportation of volcanic glass in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica
- Regional difference of attenuation of radio waves within Antarctic ice sheet
- Some characteristics of drifting snow at Mizuho Station, East Antarctica, 1982
- Observation of snow drift flux at Mizuho Station, East Antarctica, 1982
- Identification of bedrock types beneath the ice sheet by radio echo sounding in the bare ice field near the Yamato Mountains, Antarctica
- METEOROLOGICAL DATA AT MIZUHO STATION, ANTARCTICA IN 1982
- Meteorological data at Mizuho Station,Antarctica in 1982(Meteorology 15)
- Geology of the Minami-Yamato Nunataks, East Antarctica
- Geology of several islands of the west of Langhovde, East Antarctica
- Geanulite-facies rocks in several islands west of Langhovde, East Antarctica