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学科主题: Multidisciplinary Sciences
题名: Radiolarian record to paleoecological environment change events over the past 1.2 MaBP in the southern South China Sea
作者: Yang, LH ; Chen, MH ; Wang, RJ ; Zhen, F
关键词: radiolarian ; southern South China Sea ; distribution ; environmental change ; site 1143
刊名: CHINESE SCIENCE BULLETIN
发表日期: 2002
卷: 47, 期:17, 页:1478-1483
收录类别: sci
部门归属: Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Tongji Univ, Minist Educ, Key Lab Marine Geol, Shanghai 200092, Peoples R China
项目归属: 海洋地质
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 similar to 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 special cycle characteristic of paleoecological environment evolution in this area. In addition, all of the radiolarian indexes show an obvious boundary in about 0.47 MaBP, indicating the abrupt variation of the community structure and radiolarian abundance level before and after 0.47 MaBP. So we suppose that there existed a distinct change event of oceanic ecology environment during that period.
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WOS记录号: WOS:000177653300016
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4714
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Yang, LH; Chen, MH; Wang, RJ; Zhen, F.Radiolarian record to paleoecological environment change events over the past 1.2 MaBP in the southern South China Sea,CHINESE SCIENCE BULLETIN,2002,47(17):1478-1483
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文件名: Radiolarian record to paleoecological environment change events over the past 1.2 MaBP in the southern South China Sea.pdf
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