Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pepi...58..239l&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 58, Issue 2-3, p. 239-248.
Physics
Scientific paper
Anomalously steep palaeomagnetic directions from the central part of an ~ 5 m wide basaltic dyke from Fossilryggen, East Antarctica, suggest a Recent to late Tertiary age for its remanent magnetization, in conflict with K-Ar isotope ages of 162 +/- 4 and 217 +/- 3 Ma obtained from the central and slickenside margins respectively. Three neighbouring basaltic intrusions carry stable magnetizations whose directions (mean D, 23° mean I, -40° and pole position, 38°N, 40°E) accord with previously obtained Mesozoic results from lava flows in the Vestfjella basalt province, East Antarctica. Rock magnetic properties do not discriminate between the different dykes, and it is proposed that the anomalous directions represent spot-readings of the geomagnetic field which arise from complete remagnetization during a period of faulting in Recent to late Tertiary times.
Løvlie Reidar
Mitchell John
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