Determination of estuarine sedimentation rates using 230Thexcess and 230Thexcess/232Th ratio methods in the Paka estuary, Malaysia

Yunus, Kamaruzzaman and Willison, KYS and Ong, Meng Chuan (2011) Determination of estuarine sedimentation rates using 230Thexcess and 230Thexcess/232Th ratio methods in the Paka estuary, Malaysia. Trends in Applied Sciences Research, 6 (1). pp. 102-107. ISSN 1819-3579 (P), 2151-7908 (O)

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Abstract

The vertical profiles of 230Thexcess and 230Thexcess/232Th in a sediment core have been used to determine the sedimentation rates of Terengganu River estuary, Malaysia. Applying the 230Thexcess and 230Thexcess/232Th method, U and Th isotopic involved complete dissolution of the samples, followed by separation on anion exchange, average sedimentation rates of 1.02 and 1.01 cm year-1 were obtained, respectively. The results of the accretion rate obtained from the both methods are consistent with average sedimentation rates of 1.01 cm year-1. Assuming that the accretion rate values are accurate, this may imply that the sediments at the deepest core at 14 cm were deposited during the last 14.2 years ago.

Item Type:	Article (Journal)
Additional Information:	5410/18855
Uncontrolled Keywords:	230Thexcess, 230Thexcess232, sediment core, isotopic, anion exchange, accretion rate
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Biotechnology Kulliyyah of Science > Institute of Oceanography and Maritime Studies
Depositing User:	Professor Dr. Kamaruzzaman Yunus
Date Deposited:	14 Feb 2012 11:02
Last Modified:	26 Apr 2012 08:07
URI:	http://irep.iium.edu.my/id/eprint/18855

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