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Aeromagnetic reconnaissance over the Riiser-Larsen Ice Shelf, east Antarctica (1988)

KRISTOFFERSEN, YNGVE ; AALERUD, JAN

Oxford, UK : Blackwell Publishing Ltd

Polar research 6 (1988), S. 0

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ISSN: 1751-8369

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geography , Geosciences

Notes: A single 160 km long aeromagnetic profile across the Riiser-Larsen Ice Shelf from the coast to Vestfjella, indicates shallowing of the depth to the magnetic source from about 2 km below the sea floor at the ice front to a depth equivalent to ice thickness at the position of the grounding line about 80 km farther south. Adjoining marine multichannel seismic data and sonobuoy measurements suggest that the material below the ice shelf may be a prograding wedge of sediments of seismic velocity less than 3.5km/s. Parallel northeast trending magnetic anomalies between the Plogen and Dagvola nunataks in Vestfjella can best be modelled as three large dyke swarms at depth.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1751-8369.1988.tb00587.x

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Geophysical evidence for the East Antarctic plate boundary in the Weddell Sea (1986)

Kristoffersen, Yngve ; Haugland, Kristen

[s.l.] : Nature Publishing Group

Nature 322 (1986), S. 538-541

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] Major linear basement highs have been found below the lower continental slope of the southeastern Weddell Sea margin (Fig. 1). In the north-east, the Explora Escarpment4-is characterized by a well-defined 10-20-km-wide basement ridge of 1-2 km elevation with respect to hyperbolated acoustic ...