HR: 1340h
AN: U33A-0034    [Abstracts]
TI: The Precambrian of the Kalahari Craton: Apparent Polar Wander Segments, not a Path
AU: * Gose, W A
EM: wulf@mail.utexas.edu
AF: University of Texas at Austin, Dept Geological Sciences C1100, Austin, TX 78712 United States
AB: The existing Precambrian paleomagnetic data from the Kalahari craton do not define a coherent apparent polar wander path but only delineate disconnected segments, mainly due to the lack of age control. From 2.0 to 1.8 Ga, the APWP crosses northern Africa from east to west, from 1.1 to 1.0 Ga the path crosses northern Africa from north to south, and at the closing of the Precambrian the path tracks across northern Africa from south to north. Thus knowledge of the time when the magnetization was acquired is particularly critical. The Kalahari craton is a key element of the Rodinia supercontinent. Its position relative to Laurentia is very well defined at 1109 Ma, but there are no poles for about 100 Ma prior to and after this date rendering all Rodinia reconstructions ambiguous
DE: 1525 Paleomagnetism applied to tectonics (regional, global)
SC: Union [U]
MN: 2004 AGU Fall Meeting