Skip to Main Content
Book Chapter

Quaternary Sedimentation in the Molengraaff Paleo-Delta, Northern Sunda Shelf (Southern South China Sea)

By
How Kin Wong
How Kin Wong
Institute of Biogeochemistry and Marine Chemistry, Center of Marine and Climate Research, Hamburg University, Bundesstrasse 55, D-20146 Hamburg, Germany
Search for other works by this author on:
Thomas Lüdmann
Thomas Lüdmann
Institute of Biogeochemistry and Marine Chemistry, Center of Marine and Climate Research, Hamburg University, Bundesstrasse 55, D-20146 Hamburg, Germany
Search for other works by this author on:
Christiane Haft
Christiane Haft
Institute of Biogeochemistry and Marine Chemistry, Center of Marine and Climate Research, Hamburg University, Bundesstrasse 55, D-20146 Hamburg, Germany
Search for other works by this author on:
Alke-Marit Paulsen
Alke-Marit Paulsen
Institute of Biogeochemistry and Marine Chemistry, Center of Marine and Climate Research, Hamburg University, Bundesstrasse 55, D-20146 Hamburg, Germany
Search for other works by this author on:
Christian Hübscher
Christian Hübscher
Institute of Geophysics, Center of Marine and Climate Research, Hamburg University, Bundesstrasse 55, D-20146 Hamburg, Germany
Search for other works by this author on:
Jianhua Geng
Jianhua Geng
Department of Marine Geology and Geophysics, Tongji University, Shanghai, Peoples Republic of China
Search for other works by this author on:
Published:
January 01, 2003

Abstract

The seven seismic units recognized in the Molengraaff paleo-delta on the Sunda Shelf underlying the postglacial unit can be interpreted as prograding shelf-margin lowstand wedges deposited during forced regressions. Speculative age estimates of these units were made by correlating the interpreted lowstand wedges with the SPECMAP δ18Ocurve. This correlation suggests that the oldest unit reaches back to 570 ka, that the mean sedimentation rates during glacial times are comparable to modern prodelta rates, and that the tectonic subsidence rate of the outermost shelf depressions during the latest Pleistocene was of the order of 27 cm/kyr. Subsidence (which was differential) also occurred in postglacial times. The rate at the shelf edge is of the order of 2.5 m/kyr, and the differential displacements are taken up by growth-fault activity.

The outer Sunda Shelf was the delta plain of the Molengraaff River system during the last glacial, during which major fluvial entrenchment did not take place because of the low gradient. Sand ridges formed by transgressive reworking of Late Pleistocene material mark the modern water-depth range of 135–145 m. Mass wasting and fan deposition are important processes on the continental slope during regressions and lowstands.

You do not currently have access to this article.
Don't already have an account? Register

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

A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now