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Implications of late Pan-African shearing in western Dronning Maud Land, Antarctica

By
S. H. Perritt
S. H. Perritt
1
Council for Geoscience, c/o University of Natal PO Box 18091, Dalbridge 4014, South Africa (perritt@nu.ac.za)
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M. K. Watkeys
M. K. Watkeys
2
School of Geological and Computer Sciences, University of Natal Durban 4041, South Africa (watkeys@nu.ac.za)
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Published:
January 01, 2003

Abstract

The Mesoproterozoic cover rocks of the Archaean Grunehogna Province in western Dronning Maud Land, Antarctica, are gently folded and intensely fractured by a progressive ductile to brittle deformation event. The cause was dominantly NNW-SSE transpression related to a regionally extensive intracontinental sinistral strike-slip event at c. 520 Ma. This reactivated the boundary between the Archaean Grunehogna Province and the high grade Mesoproterozic Maudheim Province, and resulted in the formation and deformation of the Cambrian Urfjell pull-apart basin. In a Gondwana refit, this strike-slip system can be linked to similar zones in southeast Africa which post-date the 750–650 Ma early Pan-African collisional events of that region. The NNW movement of the Maudheim Province along this strike-slip zone was responsible for the development of thrusts in the Lurio Belt of northern Mozambique. The driving force for this movement is considered to be related to the late Pan-African collisional events elsewhere in the growing supercontinent.

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Contents

Geological Society, London, Special Publications

Intraplate Strike-Slip Deformation Belts

F. Storti
F. Storti
Università degli Studi “Roma Tre”, Rome, Italy
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R. E. Holdsworth
R. E. Holdsworth
Durham University, Durham, UK
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F. Salvini
F. Salvini
Università degli Studi “Roma Tre”, Rome, Italy
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Geological Society of London
Volume
210
ISBN electronic:
9781862394582
Publication date:
January 01, 2003

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