Peat-accumulating depositional systems of Sarawak, East Malaysia

Staub, James R. and Esterle, Joan S. (1994) Peat-accumulating depositional systems of Sarawak, East Malaysia. Sedimentary geology, 89 1-2: 91-106. doi:10.1016/0037-0738(94)90085-X


Author Staub, James R.
Esterle, Joan S.
Title Peat-accumulating depositional systems of Sarawak, East Malaysia
Journal name Sedimentary geology   Check publisher's open access policy
ISSN 0037-0738
Publication date 1994-02-01
Sub-type Article (original research)
DOI 10.1016/0037-0738(94)90085-X
Volume 89
Issue 1-2
Start page 91
End page 106
Total pages 16
Place of publication London
Publisher Elsevier B.V.
Language eng
Subject 240000 Physical Sciences
260000 Earth Sciences
Abstract Many coal deposits originate in deltaic, estuarine, and coastal plain settings and a knowledge of interrelationships between the tectonic and depositional elements active at the time of sediment deposition is necessary to formulate basin scale models. The prograding coastal depositional systems of Sarawak all contain domed peat-accumulating environments in which low-ash, low-sulfur peats are being deposited in areas of active clastic siliciclastic sedimentation. These depositional systems are as large as 11,400 km2 and individual peat deposits within systems are in excess of 20 m thick and 1000 km2 in area. The geographic positions and drainage basin areas of each depositional system are controlled by fault and fold systems. Although prograding into the same receiving basin, individual system geomorphology is variable and ranges from a wave-dominated microtidal delta, to a wave-dominated meso- to macro-tidal delta/coastal plain system, to a tide-dominated macrotidal estuarine embayment along a 450 km stretch of coastline. System variation is a function of sediment supply, shelf and embayment geometry, wave climate, and tidal range. These factors, which control depositional system geomorphology, also control the resulting long axis orientation of the thick, domed peat deposits. The surface vegetation and internal characteristics of most domed peat deposits, however, are similar. Internal characteristics consist of basal high-ash, high-sulfur, degraded peats overlain by low-ash, low-sulfur, well preserved peats in vertical profile. These systems demonstrate variable responses to late Pleistocene/Holocene sea-level rise and, in these instances, the variation is most attributable to local differences in siliciclastic sediment supply, which is a function of the drainage basin area.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Wed, 06 Aug 2008, 19:18:35 EST by Laura McTaggart on behalf of School of Mathematics & Physics