RELATIVE ABUNDANCE CHANGES, STRATIGRAPHIC AND PALAEO-OCEANOGRAPHIC SIGNIFICANCE OF RADIOLARIAN Botryocyrtis scutum IN SOUTH CHINA SEA SINCE PLEISTOCENE
Wang Rujian 1 Andrea Abelmann 2 Huang Baoqi 1 (1.Laboratory of Marine Geology, Tongji University, Shanghai200092, China; 2.Alfred Wengener Institute for Polar and Marine Research, Bremerhaven27515, Germany)
This paper presents the discussion of the stratigraphic and palaeo oceanographic significance of Botryocyrtis scutum in the three cylindrical samples that have occurred in the South China Sea since the Pleistocene. The relative abundances of the radiolarian Botryocyrtis scutum in the three cylindrical samples in the South China Sea since the Pleistocene are correlated with oxygen isotopic records, indicating that the relative abundance of the Botryocyrtis scutumv corresponds well to the oxygen isotopic records since the MIS 18. The abundance of B. scutum fluctuated during the glacial and interglacial periods, with its high abundance during the interglacial period and the low one during the glacial period. Just like the oxygen isotopic records, the abundance changes of B. scutum indicate the glacial and interglacial cycle and at the same time can be considered as a tool for the stratigraphic classification and correlation.