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Book Chapter

Tectonic re-interpretation of the Banggai-Sula–Molucca Sea margin, Indonesia

By
Ian M. Watkinson
Ian M. Watkinson
SE Asia Research Group, Department of Earth Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
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Robert Hall
Robert Hall
SE Asia Research Group, Department of Earth Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
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Farid Ferdian
Farid Ferdian
SE Asia Research Group, Department of Earth Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
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Published:
January 01, 2011

Abstract

High resolution multibeam bathymetric and seismic data from the area north of the Banggai-Sula Islands, Indonesia, provide a new insight into the geological history of the boundary between the East Sulawesi ophiolite, the Banggai-Sula microcontinent and the Molucca Sea collision zone. Major continuous faults such as the Sula Thrust and the North Sula–Sorong Fault, previously interpreted to bound and pass through the area are not seen. The south-verging Batui Thrust previously interpreted offshore to the east of Poh Head cannot be identified. In the areas where the thrust was interpreted there is a north-vergent thrust and fold zone overlain by almost undeformed sediments. Gently dipping strata of the Banggai-Sula microcontinent margin can be traced northwards beneath younger rocks. In the east, rocks of the Molucca Sea collision complex are deformed by multigenerational folds, thrusts and strike-slip faults. There is a series of small thrusts between the leading edge of the collision complex and the foot of the slope. In the west a zone of transpression close to the East Arm of Sulawesi is the termination of the dextral strike-slip Balantak Fault extending east from Poh Head.

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Contents

Geological Society Special Publications

The SE Asian Gateway: History and Tectonics of the Australia-Asia Collision

R. Hall
R. Hall
Royal Holloway University of London, UK
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M. A. Cottam
M. A. Cottam
Royal Holloway University of London, UK
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M. E. J. Wilson
M. E. J. Wilson
Curtin University, Australia
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Geological Society of London
ISBN electronic:
9781862396036
Publication date:
January 01, 2011

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