Start |Author Index | View Uploaded Presentations | Meeting Information

2015 GSA Annual Meeting in Baltimore, Maryland, USA (1-4 November 2015)

Paper No. 40-27
Presentation Time: 9:00 AM-5:30 PM

HOLOCENE SEDIMENTARY RECORD FROM THE NORTHEASTERN MALACCA STRAIT: INSIGHTS FROM BULK SEDIMENT MAGNETIC SUSCEPTIBILTY ANALYSIS


DONOVAN, Bailey G.1, CULVER, Stephen J.2, LEORRI, Eduardo2, MALLINSON, David J.2, VIJAYAN, V.R.3, SHAZILI, Noor A.M.4 and PARHAM, Peter R.4, (1)Department of Geological Sciences, East Carolina University, 101 Graham Building, Greenville, NC 27858, (2)Department of Geological Sciences, East Carolina University, Greenville, NC 27858, (3)Minerals and Geoscience Department Malaysia, 31400 Ipoh, Perak, Malaysia, (4)Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia, donovanb15@students.ecu.edu

The Strait of Malacca, a narrow passage of water between Sumatra and peninsular Malaysia, contains relatively thick (several m), fine grained sediment immediately off the west coast of Kedah, Malaysia that might contain a record of Holocene paleoclimate. To investigate this possibility, we sampled a core taken from 12.6 m water depth between Langkawi Island and the Malaysian mainland. The core, comprised of grey mud with bivalve shell fragments scattered throughout, was sampled in contiguous 2-4 cm intervals and was analyzed for bulk sediment magnetic susceptibility (BMS) on a Kappabridge MFK1-A.

The BMS data can be divided into two intervals: from 293 to 36 cm an interval of high BMS values containing three peaks, and from 36 to 0 cm an interval of lower BMS values. Variations in BMS values can be attributed to variations in sediment input from rivers on the Malaysian mainland including the Kedah and Perlis rivers. Higher values of the lower interval can be explained by greater suspended sediment load from rivers during intervals of increased intensity monsoons (more rainfall). Conversely, lower values of the upper interval reflect decreased monsoonal intensity, less rainfall and decreased sediment load.

Session No. 40--Booth# 277

Paleoclimatology/Paleoceanography (Posters)
Sunday, 1 November 2015: 9:00 AM-5:30 PM
Exhibit Hall (Baltimore Convention Center)
Geological Society of America Abstracts with Programs. Vol. 47, No. 7, p.128
© Copyright 2015 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
Back to: Paleoclimatology/Paleoceanography (Posters)
<< Previous Abstract | Next Abstract >>