Geochemical Analysis and Beryllium-Dating Studies of Marine Core Sediment Belong to the Central Western Bay of Bengal

Abstract

A gravity core of 4.12cm was collected from the marginal coastal waters of central western Bay of Bengal, covering the continental shelf off Krishna Delta (Nizampatnam Bay) during the 157 cruises of O. R.V. Sagar Kanya. It was subsampled with every 2cm interval, resulting in 212 samples. Half of each sample was dried at 60 ⁰C, ground and sieved through a 230 mesh size and studied for organic carbon (OC), calcium and magnesium carbonates (CaCo₃ & MgCo₃) by titration methods. By following the 10Be/⁹Be dating study method, investigations about the rate of sedimentation was also carried out, and all the results were interpreted based on the existing phenomenon.

Keywords: Marine sediment, calcium and magnesium carbonates, Geochemical, Dating, Organic Carbon