De Gerlache Seamounts

De Gerlache Seamounts
Highest peak	Lecointe-Guyot ( 350 m below sea level )
part of	Southern ocean
Coordinates	65 ° 0 ′ S , 90 ° 30 ′ W Coordinates: 65 ° 0 ′ S , 90 ° 30 ′ W
rock	basalt
Age of the rock	20-23 million years

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The De-Gerlache-Seamounts are deep-sea mountains in the Southern Ocean about 450 km north of the Bellingshausen Sea .

They are located about 400 km north of Peter I Island , with which they are connected by the Bellingshausen gravity anomaly , which runs from the coast of West Antarctica northward to 62 ° south latitude.

The two highest mountains of the De-Gerlache-Seamounts are the Belgica- and the Lecointe-Guyot , whose flat summit plateaus of 600 and 200 km² respectively are between 350 and 600 m below sea level. They are the southernmost known guyots . Rock samples collected from Belgica-Guyot are 20 to 23 million years old.

The De Gerlache Seamounts were discovered in 1970 on the 42nd voyage of the survey vessel USNS Eltanin . In 1995 they were systematically examined by the crew of the German research vessel Polarstern . Since 1988 it is named after Adrien de Gerlache de Gomery , the leader of the Belgica expedition (1897–1899) to the Antarctic .

Web links

De Gerlache Seamounts in the Geographic Names Information System of the United States Geological Survey (English)

Individual evidence

↑ ^a ^b ^c R. A. Hagen, Karsten Gohl, Rainer Gersonde, Gehard Kuhn, David Völker, VN Kodagali: A geophysical survey of the De Gerlache Seamounts: preliminary results (PDF; 1.18 MB). In: Geo-Marine Letters . Volume 18, 1998, pp. 19-25 (English).
↑ Birgit Hagedorn, Rainer Gersonde, Karsten Gohl, Hans-Wolfgang Hubberten: Petrology, Geochemistry and K-Ar Age Constraints of the Eastern De Gerlache Seamount Alkaline Basalts (Bellingshausen Sea, Southeast Pacific) (PDF; 11.25 MB). In: Polar Research . Volume 76, No. 3, 2006 (published 2007), pp. 87-94 (English).
^ Brian E. Tucholke, Robert E. Houtz: Sedimentary framework of the Bellingshausen Basin from seismic proÞler data (PDF; 7.0 MB). In: CD Hollister, C. Craddock et al. (Ed.): Initial Reports Deep Sea Drilling Project . US Government Printing Office, Washington, DC, Vol. 35, 1976, pp. 197-227.

[Hagen-1] R. A. Hagen, Karsten Gohl, Rainer Gersonde, Gehard Kuhn, David Völker, VN Kodagali: A geophysical survey of the De Gerlache Seamounts: preliminary results (PDF; 1.18 MB). In: Geo-Marine Letters . Volume 18, 1998, pp. 19-25 (English).

[Hagedorn-2] Birgit Hagedorn, Rainer Gersonde, Karsten Gohl, Hans-Wolfgang Hubberten: Petrology, Geochemistry and K-Ar Age Constraints of the Eastern De Gerlache Seamount Alkaline Basalts (Bellingshausen Sea, Southeast Pacific) (PDF; 11.25 MB). In: Polar Research . Volume 76, No. 3, 2006 (published 2007), pp. 87-94 (English).

[3] Brian E. Tucholke, Robert E. Houtz: Sedimentary framework of the Bellingshausen Basin from seismic proÞler data (PDF; 7.0 MB). In: CD Hollister, C. Craddock et al. (Ed.): Initial Reports Deep Sea Drilling Project . US Government Printing Office, Washington, DC, Vol. 35, 1976, pp. 197-227.