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Tectonic Evolution of Southeast Geological Society Special Publications Series Editor A. J. FLEET GEOLOGICAL SOCIETY SPECIAL PUBLICATION NO. 106

Tectonic Evolution of

EDITED BY

ROBERT HALL SE Asia Research Group Department of Geology Royal Holloway London University Surrey, UK

AND

DEREK BLUNDELL SE Asia Research Group Department of Geology Royal Holloway London University Surrey, UK

1996 Published by The Geological Society London THE GEOLOGICAL SOCIETY

The Society was founded in 1807 as the Geological Society of London and is the oldest geological society in the world. It received its Royal Charter in 1825 for the purpose of 'investigating the mineral structure of the '. The Society is Britain's national society for geology with a membership of 8000. It has countrywide coverage and approximately 1000 members reside overseas. The Society is responsible for all aspects of the geological sciences including professional matters. The Society has its own publishing house, which produces the Society's international journals, books and maps, and which acts as the European distributor for publications of the American Association of Petroleum Geologists, SEPM and the Geological Society of America. Fellowship is open to those holding a recognized honours degree in geology or cognate subject and who have at least two years' relevant postgraduate experience, or who have not less than six years' experience in geology or a cognate subject. A Fellow who has not less than five years' relevant postgraduate experience in the practice of geology may apply for validation and, subject to approval, may be able to use the designatory letters C Geol (Chartered Geologist). Further information about the Society is available from the Membership Manager, The Geological Society, Burlington House, Piccadilly, London W1V 0JU, UK. The Society is a Registered Charity, No. 210161

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Printed by The Alden Press, Osney Mead, Oxford, UK Contents

HALL, R. & BLUNDELL, D. J. Tectonic evolution of SE Asia: introduction vii

Part 1: Present-day tectonics MCCAFFREY, R. Slip partitioning at convergent plate boundaries of SE Asia 3 MALOD, J. A. & KEMAL, B. M. The Sumatra margin: oblique subduction and lateral displacement of the accretionary prism 19 RANGIN, C., DAHRIN, D., QUEBRAL, R. & THE MODEC SCIENTIFICPARTY. Collision and strike-slip faulting in the northern Molucca (Philippines and ): preliminary results of a morphotectonic study 29 RICHARDSON, A. N. & BLUNDELL, D. J. Continental collision in the Banda arc 47 SNYDER, D. B., MILSOM, J. & PRASETYO, H. Geophysical evidence for local indentor tectonics in the Banda arc east of Timor 61 HUGHES, B. D., BAXTER, K., CLARK, R. A. & SNYDER, D. B. Detailed processing of seismic reflection data from the frontal part of the Timor trough accretionary wedge, eastern Indonesia 75 MILSOM, J., KAYE, S. & SARDJONO.Extension, collision and curvature in the eastern Banda arc 85

Part 2: Tectonic development of Southeast Asia METCALFE, I. Pre-Cretaceous evolution of SE Asian terranes 97 PACrd-IAM, G. Cenozoic SE Asia: reconstructing its aggregation and reorganization 123 HALL, R. Reconstructing Cenozoic SE Asia 153 SIMANDJUNTAK,T. O. & BARBER, A. J. Contrasting tectonic styles in the Neogene orogenic belts of Indonesia 185 RICHTER, B. & FULLER, M. Palaeomagnetism of the Sibumasu and Indochina blocks: implications for the extrusion tectonic model 203 STOKES, R. B., LOVATT SMITH, P. E & SOUMPHONPHAKDY,K. Timing of the Shan-Thai-Indochina collision: new evidence from the Pak Lay Foldbelt of the Lao PDR 225 LOVATr SMITH, P. F., STOKES, R. B., BRISTOW, C. & CARTER, A. Mid-Cretaceous inversion in the Northern Khorat Plateau of Lao PDR and Thailand 233 HtrrCHISON, C. S. The 'Rajang accretionary prism' and 'Lupar Line' problem of Borneo 247 OMANG, S. A. K. • BARBER, m. J. Origin and tectonic significance of the metamorphic rocks associated with the Darvel Bay Ophiolite, Sabah, Malaysia 263 NGAH, K., MADON, M. & TJIA, H. D. Role of pre-Tertiary fracture in formation and development of the Malay and Penyu basins 281 TJIA, H. D. & LIEW, K. K. Changes in tectonic stress field in northern Sunda Shelf basins 291 CLENYELL, B. Far-field and gravity tectonics in Miocene basins of Sabah, Malaysia 307 McCOURT, W. J., CROW, M. J., COBBING, E. J. & AMIN, T. C. Mesozoic and Cenozoic plutonic evolution of SE Asia: evidence from Sumatra, Indonesia 321 SAMUEL, M. A. & HARBURV, N. A. The Mentawai fault zone and deformation of the Sumatran Forearc in the Nias area 337 WAKITA, K., SOPAHELUWAKAN,J., MIYAZAKI,K., ZULKARNAIN,I., & MUNASRI. Tectonic evolution of the Bantimala Complex, South , Indonesia 353 vi CONTENTS

WILSON, M. E. J. & BOSENCE, D. W. J. The Tertiary evolution of South Sulawesi: a record in redeposited carbonates of the Tonasa Limestone Formation 365 BERGMAN, S. C., COFFIELD, D. Q., TALBOT, J. P. • GARRARD, R. A. Tertiary tectonic and magmatic evolution of western Sulawesi and the , Indonesia: evidence for a Miocene -continent collision 391 ALI, J. R., MILSOM, J., FINCH, E. M. & MUBROTO, B. SE Sundaland accretion: palaeomagnetic evidence of large Plio-Pleistocene thin-skin rotations in Buton 431 VROON, P. Z., VAN BERGEN, M. J. & FORDE, E. J. Pb and Nd isotope constraints on the provenance of tectonically dispersed continental fragments in east Indonesia 445 LINTHOUT, K., HELMERS, H., WIJBRANS, J. R. & VAN WEES, J. D. A. M. 4°Ar/a9Ar constraints on obduction of the Seram ultramafic complex: consequences for the evolution of the southern 455 CHARLTON, T. R. Correlation of the Salawati and Tomori Basins, eastern Indonesia: a constraint on left-lateral displacements of the Sorong fault zone 465 MALAIHOLLO, J. E A. & HALL, R. The geology and tectonic evolution of the Bacan , east Indonesia 483 BAKER, S. & MALAIHOLLO,J. Dating of Neogene igneous rocks in the region: arc initiation and development 499 PUBELLIER, M., QUEBRAL, R., AURELIO, M. & RANGIN, C. Docking and post-docking escape tectonics in the southern Philippines 511 CROWHURST, P. V., HILL, K. C., FOSTER, D. A. & BENNETT, A. R Thermochronological and geochemical constraints on the tectonic evolution of northern Papua New Guinea 525 WOPFNER, H. Gondwana origin of the Baoshan and Tengchong terranes of west Yunnan 539 ZI-IOU, Z., LAO, Q., CHEN, H., DING, S. & LIAO, Z. Early Mesozoic orogeny in Fujian, southeast China 549 Index 557