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A study on pre- and post-tsunami shallow deposits off SE coast of India from the 2004 Indian Ocean tsunami: a geochemical approach

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  • S. Srinivasalu
  • M. Jonathan
  • N. Thangadurai
  • V. Ram-Mohan

Abstract

A study was made on samples from one core collected immediately after the December 2004 Asian tsunami to know the geochemical nature of the offshore tsunami sediments. The core sample was analyzed for sediment grain size, CaCO 3 , organic carbon (OC) and major elements (SiO 2 , TiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, MgO, Na 2 O, K 2 O, P 2 O 5 , MnO). The results indicate that the core sample can be divided into two parts: (1) upper 0–25 cm, interpreted to be deposited after tsunami (AT), and (2) lower 25–45 cm, interpreted as before tsunami (BT) as evidenced by the sandy nature AT with fluctuating CaCO 3 contents. The AT part is devoid of OC suggesting that the sediment could have been transported to deeper regions along with the finer particles. Major elements such as SiO 2 , TiO 2 , CaO indicate high values than the other elements in AT part than in the BT part. The BT part contains Al rich alluvium mud associated with finer mud and organic particles. An analysis of the correlation matrix indicates the possible source of elements and transport of heavy minerals in the AT part than the BT part. The overall results suggest that the sediments could possibly have two different origins. Copyright Springer Science+Business Media B.V. 2010

Suggested Citation

  • S. Srinivasalu & M. Jonathan & N. Thangadurai & V. Ram-Mohan, 2010. "A study on pre- and post-tsunami shallow deposits off SE coast of India from the 2004 Indian Ocean tsunami: a geochemical approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 52(2), pages 391-401, February.
    • Handle: RePEc:spr:nathaz:v:52:y:2010:i:2:p:391-401
    DOI: 10.1007/s11069-009-9385-0
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    References listed on IDEAS

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    1. S. Mahendra Dev, 2008. "India," Chapters, in: Anis Chowdhury & Wahiduddin Mahmud (ed.), Handbook on the South Asian Economies, chapter 1, Edward Elgar Publishing.
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    1. Ali Mohammad & E.N. Dhanamjayarao, 2020. "The Impact Of Seasonal Changes On Heavy Minerals Concentration From A Part Of East Coast Of India," Malaysian Journal of Geosciences (MJG), Zibeline International Publishing, vol. 5(1), pages 12-21, November.

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