A geophysical survey of the De Gerlache Seamounts: Preliminary results
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Date
1998Author
Hagen, R.A.
Gohl, K.
Gersonde, R.
Kuhn, G.
Volker, D.
Kodagali, V.N.
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The De Gerlache Seamounts actually consist of two medium-sized guyots, with summits at depths of 350-600 m. Acoustic profiler data show no significant sediment on these guyots. Alkaline basalts dredged from the summit of the eastern guyot yield K/Ar ages between 20.1 ~c 1.0 and 23.2 ~c 1.2 Ma. Basement ridges and sediment-filled troughs between the guyots are associated with the prominent gravity anomaly extending north from the Antarctic margin. This structure possibly played a role in the guyot formation, however, the question of how the De Gerlache Seamounts are related to this gravity anomaly remains uncertain.
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