Characterization of 2004 Indian Ocean Tsunami induced deposits along the Chennai coast using magnetic and geochemical techniques

摘要

Present study is the applicability of rock magnetic techniques, coupled with geochemical (SiO2, Al2O3, Fe2O3, CaO, MgO, K2O, P2O5, and MnO) and texture size measurements, as a proxy tool to identify tsunami induced deposits in the core sediments from the Chennai coast, India. Down core profiles of mass specific magnetic susceptibility (chi), chi(ARM) and SIRM are similar in all sediment cores, and reflect changes in the detrital component mineralogy which is largely influenced by the tsunami event. To identify the connection between the tsunami deposit and different sedimentologic units present in the study area, textural, geochemical and rock magnetic data were processed by multivariate statistical analyses.