Stepwise paleoceanographic changes during the last deglaciation in the southern South China Sea: Records of stable isotope and microfossils

作者：Jian ZM^*; Chen MB; Lin HL; Wang PX

来源：Science in China - Series D: Earth Sciences , 1998, 41(2): 187-194.

DOI：10.1007/BF02932439

• last deglaciation
• stepwise change
• stable isotope
• microfossils
• South China Sea

Quantitative analyses of microfossils and stable isotopic analysis were carried out for Core SCS-12 in the southwestern slope of the South China Sea (SCS). A high-resolution paleoceanographic record for the last 13 ka was revealed with the AMS C-14 dates. The southern SCS has experienced stepwise paleoceanographic changes since the last deglaciation. The oxygen isotopic stage 1/2 boundary around 12.05 ka B.P. and the end of the last deglaciation around 7.70 ka B.P. are two rapid change periods (corresponding to the termination I-A and termination I-B, respectively), in between is a slow change period. The authors infer that the sea level stood at -110 m before the termination I-A, roughly the same as today after the termination I-B, and about -50 m in between. Subsequently, the average winter sea surface temperature and salinity obviously increased while paleo-productivity decreased since 12.05 ha B.P. The early Holocene CaCO3 preservation spike, coupled with a high abundance of pteropoda and CaCO3 content, occurred around 7.70 ka B.P.

• 出版日期1998-4
• 单位中山大学; 同济大学