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Sediment texture, distribution and transport on the Ayeyarwady continental shelf, Andaman Sea

DRS at CSIR-National Institute of Oceanography

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Title Sediment texture, distribution and transport on the Ayeyarwady continental shelf, Andaman Sea
 
Creator Rao, P.S.
Ramaswamy, V.
Thwin, S.
 
Subject sediment transport
sediment texure
continental shelves
grain size
sediment composition
geochemistry
terrigenous sediments
tidal currents
monsoons
 
Description The Ayeyarwady continental shelf is a complex sedimentary system characterized by large sediment influx (N360 million ton/yr), a wide shelf (N170 km), a strong tidal regime (7 m maximum tidal range), and incised by the Martaban Canyon. Grain size distribution on the Ayeyarwady shelf reveals three distinct areas in terms of sediment texture (i) a near-shore mud belt in the Gulf of Martaban and adjacent inner shelf (ii) outer shelf relict sands and (iii) mixed sediments with varying proportions of relict sand and modern mud in the Martaban Canyon. The bulk of the terrigenous sediment discharged by the Ayeyarwady River is displaced eastwards by a combination of tidal currents and clockwise flowing SW monsoon current and deposited in the Gulf of Martaban resulting in shoaling of its water depths. Part of the sediment discharge reaches the deep Andaman Sea via the Martaban Canyon and the rest is transported westward into the Bay of Bengal by the counter-clockwise flowing NE monsoon currents.
 
Date 2008-02-22T05:30:14Z
2008-02-22T05:30:14Z
2005
 
Type Journal Article
 
Identifier Marine geology, Vol.216; 239-247p.
http://drs.nio.org/drs/handle/2264/952
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Elsevier