Sedimentation and tectonics of Paleogene sediments in central Sarawak

702001-100883-680-B
Author : Felix Tongkul
Publication : Bulletin of the Geological Society of Malaysia
Page : 135-155
Volume Number : 40
DOI : https://doi.org/10.7186/bgsm40199711

Bulletin of the Geological Society of Malaysia, Volume 40, July 1997, pp. 135 - 155

 

Sedimentation and tectonics of Paleogene sediments in central Sarawak

FELIX TONGKUL

Earth Science Department, Universiti Kebangsaan Malaysia

 

Abstract: The deposition of the Paleogene sediments in Central Sarawak occurred in four successive stages, its axis of depocentre generally advancing and younging to the northeast in response to progressive southwest subduction-accretion of a Mesozoic oceanic lithosphere and its sedimentary cover under West Sarawak. The younger sediments were deposited on top or in front of an older accreted sediments. The timing of deposition and accretion is uncertain due to lack of precise age indicators. However, based on regional considerations, the accretion is interpreted to have occurred sometimes during the Early Paleocene, Middle Eocene, Upper Eocene and Upper Oligocene, respectively, along major fault zones, producing four tectono-stratigraphic units. The older sediments were subjected to polyphase deformation as younger units were accreted. 

https://doi.org/10.7186/bgsm40199711