Calcareous Nannofossils and Foraminifera Biostratigraphy on the Northeastern Slope of the South China Sea and Variation in Sedimentation Rates
Chen Fang
Zhuang Chang
Zhou Yang
Su Xin
Duan Xiao
Liu Guanghu
Wu Cong
Jing Xia
Abstract：Middle Pleistocene to Holocene calcareous nannofossils and foraminifera biostratigraphy in 5 sites (GMGS05、GMGS07、GMGS08、GMGS09 and GMGS16)from the Dongsha gas hydrate drilling area of the northeastern South China Sea have been studied.A total of 3 nannofossils events and 2 foraminifera events from middle Pleistocene to Holocene were recog-nized.The oldest sediments recovered are in an age of middle Pleistocene,younger than 0.50 Ma,the age assigned for gas hy-drate occurrence zone is middle Pleistocene to Holocene in sites GMGS05、GMGS07、GMGS08 and GMGS16.Sedimentation rates varied from 36.9 cm/ka to 73.3 cm/ka,and reaching the highest average value 54.2 cm/ka since 0.12 Ma in the Dongsha gas hydrate drilling area.The mean sedimentation rate has been 47.4 cm/ka since 0.44 Ma .The results suggested that the gas hydrate drilling area is located at sedimentary body with high sedimentation rate,which is advantageous to gas hydrate forma-tion.This conclusion is consistent with the previous research.
Keywords：biostratigraphysedimentation ratemiddle Pleistocenegas hydrate drilling areanortheastern slope of South China Sea
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 416-424 )