Skip to Main Content
Book Chapter

A Depositional Model and the Stratigraphic Development of Modern and Ancient Tide-Dominated Deltas in NW Borneo

By
Joseph J. Lambiase
Joseph J. Lambiase
Department of Petroleum Geoscience, Universiti Brunei Darussalam, Tungku Link BE1410, Brunei e-mail: lambiase@fos.ubd.edu.bn
Search for other works by this author on:
Abdul Razak Damit
Abdul Razak Damit
Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen, AB24 3UE, United Kingdom
Search for other works by this author on:
Michael D. Simmons
Michael D. Simmons
Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen, AB24 3UE, United Kingdom
Search for other works by this author on:
Raden Abdoerrias
Raden Abdoerrias
Department of Petroleum Geoscience, Universiti Brunei Darussalam, Tungku Link BE1410, Brunei
Search for other works by this author on:
Azhar Hussin
Azhar Hussin
Department of Geology, University of Malaya, 50603 Kuala Lumpur, Malaysia
Search for other works by this author on:
Published:
January 01, 2003

Abstract

The modern deltas of NW Borneo have long been regarded as wave-dominated, as typified by the Baram River Delta. However, the sedimentary facies associated with several modern deltas within Brunei Bay are strongly tide-dominated. A notable example is the Trusan River Delta, which occurs within a subsiding sub-basin and has an intertidal morphology and facies distribution that indicates tidal dominance, although the shoreline geometry suggests significant fluvial influence. The succession becomes sandier upward from embayment muds through mixed sand and mud flats to tidal-channel and bar sands near mean sea level, and then fines upward to tidal sand flats and finally mud flats near the high-tide shoreline.

Tide-dominated sediments also are common in the outcropping strata of the mid-Miocene and younger Belait Formation. The Seven-Up Beach succession is interpreted as the distal ends of progradational lobes of a tide-dominated delta that coarsen upward from brackish-water mudstone through muddy and sandy tide-dominated mouth-bar deposits to tidal-channel and bar sandstones. The tidal-flat and tidal-channel and bar sandstones and interbedded tidal-flat mudstones of the Jalan Sungai Akar succession are more proximal deposits of a similar delta. Examples of distributary channels that eroded into lobe deposits during a relative sea-level fall and were backfilled during the subsequent relative sea-level rise are exposed in the Tanjong Batu succession. All three outcropping successions are strongly aggradational.

A model for tide-dominated deltas in NW Borneo derived from the modern facies distribution and outcrop stratigraphy indicates that stratigraphic architecture is controlled primarily by the interaction of tectonic and compaction-driven subsidence, a relatively high rate of sediment supply, and basin hydrodynamics. The result is a largely aggradational, sandy intertidal succession on the delta plain and muddy delta-front deposits, with aggradational stacking of individual delta lobes.

You do not currently have access to this article.

Figures & Tables

Contents

SEPM Special Publication

Tropical Deltas of Southeast Asia—Sedimentology, Stratigraphy, and Petroleum Geology

F. Hasan Sidi
F. Hasan Sidi
Search for other works by this author on:
Dag Nummedal
Dag Nummedal
Search for other works by this author on:
Patrice Imbert
Patrice Imbert
Search for other works by this author on:
Herman Darman
Herman Darman
Search for other works by this author on:
Henry W. Posamentier
Henry W. Posamentier
Search for other works by this author on:
SEPM Society for Sedimentary Geology
Volume
76
ISBN electronic:
9781565762138
Publication date:
January 01, 2003

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal