Sivorgfjella

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Sivorgfjella
Highest peak Paalnibba ( 2711  m )
location Queen Maud Land , East Antarctica
part of Heimefrontfjella
Sivorgfjella (Antarctica)
Sivorgfjella
Coordinates 74 ° 41 ′  S , 11 ° 20 ′  W Coordinates: 74 ° 41 ′  S , 11 ° 20 ′  W
surface 1,800 km²
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The Sivorgfjella is the central and largest part of the Heimefrontfjella in Neuschwabenland . It is separated from the other parts of Heimefrontfjella in the south by the glacier- filled Kiberdalen and in the north by the glaciated KK-Dalen. The mountain ranges and Nunataks cover an area of ​​about 1800 km²; the highest point is the 2711 m high Paalnibba . The mountain range was named after the Norwegian underground organization Sivorg , which coordinated civil resistance in Norway during World War II .

geology

see also Geology of Heimefrontfjella

The mountain range consists of banded sequences of gneisses and amphibolites , the protoliths of which were formed around 1100 mya ago in the vicinity of a volcanic island arc . The rocks were deformed and metamorphosed when the arch of the island collided with the Grunehogna craton , part of the Kaapvaal craton formerly neighboring in Rodinia ; large amounts of silicate melts penetrated and solidified as granite massifs . In the Cambrian , the rocks were tectonically and metamorphically overprinted again when Gondwana was formed .

Geological overview map of Heimefrontfjella.

History of exploration

From 1963 to 1967 several British expeditions visited the mountains, which carried out a geodetic and geological program. Since the southern summer of 1985/86, the mountains have been systematically investigated and mapped , mainly by German and Swedish expeditions . Sweden also operates the only research station in Sivorgfjella. The station Svea is at the exit of the Scharffenbergbotnen on a rock spur at 74 ° 35′S and 11 ° 13′W.

Individual evidence

  1. ↑ Data sheet of the Australian Antarctic Division on Sivorgfjella , accessed on May 5, 2009.
  2. ↑ Jacobs, J. et al. (2002): Magnetic susceptibilities of the different tectono-stratigraphic terranes of Heimefrontfjella, western Dronning Maud Land, East Antarctica. Polar Research 72: 41-48. (PDF; 2.4 MB)
  3. ↑ Manfred Pietschmann The long way to Gondwana . Geo-Knowledge, No. 4, 1990

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