南海S08-57站柱样岩心地球化学特征及古海洋学意义

对南海S08-57站柱样岩心的CaCO3、SiO2、Al2O3、TFe2O3、MgO、CaO、Na2O、K2O、TiO2、P2O5、MnO、Cu、Pb、Zn、Co、Ni、Ba、Sr、Rb、V、Cr、La、Ce和Ta的含量变化进行了分析;根据CaCO3含量变化建立了碳酸钙地层时标,提出了南海碳酸钙地层学的SB4.0事件,进一步完善了南海标准碳酸钙地层学时标;讨论了沉积物地球化学特征及古海洋学意义。结果表明,S08-57柱样岩心的SB3.33m事件附近存在一次强碳酸盐沉积,Al2O3、TiO2、Nb、SiO2、K2O、Ta、La、Rb、Ce、MgO、Zn、TFe2O3、Na2O、V、Pb和Cr的沉积曲线与CaCO3近似呈镜像关系。

Geochemical characteristics of core S08-57 in South China Sea and their paleoceanographic significance

The contents of CaCO3,SiO2,Al2O3,TFe2O3,MgO,CaO,Na2O,K2O,TiO2,P2O5,MnO,Cu,Pb,Zn,Co,Ni,Ba,Sr,Rb,V,Cr,La,Ce and Ta in the sediment samples from the core S08-57 in the South China Sea were analyzed to study their paleoceanographic significance.According to the content change of calcium carbonate,the authors established a CaCO3 chemostratigraphy and brought forward an event named SB4.0 of the South China Sea,making a further development of the standard CaCO3 chemostratigraphy of the South China Sea.The authors also discussed the geochemical characteristics and their paleoceanographic implications of the core S08-57.The results showed that there existed a strong CaCO3 sediment event at SB3.33m,and the sedimentary curves of Al2O3,TiO2,Nb,SiO2,K2O,Ta,La,Rb,Ce,MgO,Zn,TFe2O3,Na2O,V,Pb and Cr are very similar,all showing an enantiomorphous relation to CaCO3.