Palaeomagnetism of the Brewer Conglomerate in central Australia, and fast movement of Gondwanaland during the Late Devonian

Palaeomagnetic analysis of 11 diamond-drill cores from the Late Devonian Brewer Conglomerate in the northeastern part of the Amadeus Basin, central Australia, yields three magnetic components: a drilling-induced remanence (C1) acquired during the industrial drilling process, a mid- to Late Carbonife...

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Bibliographic Details
Published in:Geophysical Journal International
Main Authors: Chen, Z., Li, Z. X., Powell, C. McA., Balme, B. E.
Format: Text
Language:English
Published: Oxford University Press 1993
Subjects:
Articles
South Pole
South pole
Online Access:http://gji.oxfordjournals.org/cgi/content/short/115/2/564
https://doi.org/10.1111/j.1365-246X.1993.tb01207.x
Description
Summary:Palaeomagnetic analysis of 11 diamond-drill cores from the Late Devonian Brewer Conglomerate in the northeastern part of the Amadeus Basin, central Australia, yields three magnetic components: a drilling-induced remanence (C1) acquired during the industrial drilling process, a mid- to Late Carboniferous syndeformational overprint (C2) acquired during the Alice Springs Orogeny, and a primary remanence (C3). C3 passes a fold test and gives a latest Devonian pole (BC) at 47.1°S, 041.0°E with A 95 = 6.4°. The revised APWP for Gondwanaland requires West Gondwanaland to drift across the South Pole during the Late Devonian with a speed of |20cm yr-1, while East Gondwanaland remained at low-latitude positions. It is suggested that fast plate movement occurred far more often during the Palaeozoic than has previously been thought.

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