| Quaternary high-resolution opal record and its paleoproductivity implication at ODP Site 1143,southern South China Sea |
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| 作者姓名： | WANGRujian LIJian |
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| 作者单位： | LaboratoryofMarineGeology,MEO,TongjiUniversity,Shanghai200092,China |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，高等学校全国优秀博士学位论文作者专项基金，教育部高校骨干教师资助计划 |
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| 摘 要： | The correlation of opal content and MAR with oxygen isotopic records of benthonic foraminifera at Site 1143, southern South China Sea indicates that,since about 900 ka,the increasing opal content and MAR during the interglacial periods is inferred to reflect the bigher surface productivity ,for the intensified summer monsoon during the interglacial periods would result in the enhanced upwelling and nutrient supply,Time-sequence spectral analyses of oxygen isotopic record ,opal content and MAR at intervals of 0-900 ka reveal that the changes of surface productivity were dominantly forced by the variations of the earth orbital cycles.
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| 关 键 词： | 中国南海 第四纪 蛋白石含量 MAR 古生产力 四膜虫 沉积物 氧同位素 |
| 收稿时间： | 2002-10-08 |
Quaternary high-resolution opal record and its paleoproductivity implication at ODP Site 1143, southern South China Sea |
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| WANGRujian LIJian.Quaternary high-resolution opal record and its paleoproductivity implication at ODP Site 1143,southern South China Sea[J].Chinese Science Bulletin,2003,48(4):363-367. |
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| Authors: | Rujian Wang Jian Li |
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| Institution: | WANG Rujian & LI Jian Laboratory of Marine Geology, MEO, Tongji University, Shanghai 200092, China |
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| Abstract: | The correlation of opal content and MAR with oxygen isotopic records of benthonic foraminifera at Site 1143, southern South China Sea indicates that, since about 900 ka, the increasing opal content and MAR during the interglacial periods is inferred to reflect the higher surface productivity, for the intensified summer monsoon during the interglacial periods would result in the enhanced upwelling and nutrient supply. Time-sequence spectral analyses of oxygen isotopic record, opal content and MAR at intervals of 0900 ka reveal that the changes of surface productivity were dominantly forced by the variations of the earth orbital cycles. |
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| Keywords: | opal MAR paleoproductivity obital forcing Quaternary South China Sea |
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