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    A geophysical survey of the De Gerlache Seamounts: Preliminary results

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    Geo-Mar_Lett_18_19.pdf (1.194Mb)
    Date
    1998
    Author
    Hagen, R.A.
    Gohl, K.
    Gersonde, R.
    Kuhn, G.
    Volker, D.
    Kodagali, V.N.
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    Abstract
    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.
    URI
    http://drs.nio.org/drs/handle/2264/969
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