Radiolarian record to paleoecological environment change events over the past 1.2 MaBP in the southern South China Sea

作     者：YANG Lihong CHEN Muhong WANG Rujian ZHEN Fan 

作者机构：The South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Key Laboratory of Marine GeologyMinistry of EducationTongji UniversityShanghai 200092China 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2002年第47卷第17期

页      面：1478-1483页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 49999560) the National Key Basic Research Special Foundation Project (Grant No. 2000078500) the Knowledge Innovation Project of the Chinese Academy of Sciences (Gran 

主　　题：radiolarian southern South China Sea distribution environmental change site 1143. 

摘      要：This note studies the Radiolarian fossil groups since 1.2 MaBP in ODP leg 184 site 1143, the southern South China Sea (SCS). The result shows that radiolarian abundance experienced a significant variation: before 0.9 MaBP it remained at the extremely low level, but increased with low extent between 0.9-0.65 Ma, which corresponded to the Mid-Pleistocene Transition stage, and it increased rapidly after 0.65 MaBP. During the whole process, the average abundance became higher and higher in each stage, and showed regularly periodic fluctuations. The obvious increase after 0.65 MaBP is inferred to result from the enhanced up-welling in this region, which was induced by the intensified monsoon circulation after the Mid-Pleistocene Transition . An outstanding result of the spectral analyses is that a long oscillation of - 0.2 Ma cycle was found in the records of radiolarian abundance and complex diversity, which corresponds well to the result of other paleoceanographic indexes. This probably indicated a