Geochemical characteristics of organic matter in the Andaman Sea sediments: Implications for source, paleovegetation and paleoclimate changes

H.M. Zakir Hossain, Jashore University of Science and Technology, Department of Petroleum and Mining Engineering, Jashore, Bangladesh, Yoshikazu Sampei, Shimane University, Department of Geoscience, Matsue, Japan and Hodaka Kawahata, University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan