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Title: Variations in core sediments of Muthupet lagoon, south-east coast of India: Geochemical and paleo-environmental imprints
Authors: Velmurugan, P.M.
Mohana, P.
Keywords: Core sediments;Geochemistry;Major oxides;210Pb;Paleoweathering;Muthupet lagoon India
Issue Date: Aug-2019
Publisher: NISCAIR-CSIR, India
Abstract: The aim of the present study is to evaluate the climatic depositional control in the Muthupet lagoon, south-east coast of India. Sediment cores (C1 and C2) were collected from the middle of the lagoon and the downcore variations of geochemical parameters and their ratios were employed to reveal the characteristics of Holocene climate and associated paleo-environmental implications. The sediment accumulation rates using the constant rate supply (CRS) model for Muthupet lagoon ranged from 0.37 to 10.57 mm year−1 and from 0.16 to 6.11 mm year−1 in the two cores. The study has confirmed the ability of 210Pb dating method to provide reliable chronologies in lagoon sediment sequences. The CRS model is more suitable for the determination of  age and accumulation rates of sediment; and this model can also determine the accumulation rates which vary with depth as well as with time (year). The comprehensive characterization of the sediments using radiometric and sedimentological methods made it possible to better understand and judiciously interpret the radionuclide profiles.
Page(s): 1238-1244
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.48(08) [August 2019]

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