Determination of estuarine sedimentation rates using 230Thexcess and 230Thexcess/232Th ratio methods in the Paka estuary, Malaysia
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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academic Journals Inc., USA
2011
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/18855/ http://irep.iium.edu.my/18855/ http://irep.iium.edu.my/18855/ http://irep.iium.edu.my/18855/1/determination_of_estuarine.pdf |
| Summary: | 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. |
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