| 西太平洋807A孔的元素地球化学特征及其对中更新世气候转型期的记录 |
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| 引用本文： | 吴旻哲,乔培军,邵磊.西太平洋807A孔的元素地球化学特征及其对中更新世气候转型期的记录[J].海洋地质与第四纪地质,2010(2). |
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| 作者姓名： | 吴旻哲 乔培军 邵磊 |
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| 作者单位： | 同济大学海洋地质国家重点实验室; |
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| 基金项目： | 国家重点研究专项经费项目(2007CB819501);;国家自然科学基金项目(40976023) |
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| 摘 要： | 通过对ODP807A孔上部60.77m样品进行元素地球化学分析,揭示了晚上新世3.2Ma以来的沉积物元素含量变化特征。结果显示元素含量在中更新世过渡期均发生明显变化,具体表现为与陆源碎屑密切相关的元素含量下降,生物源元素含量显著上升,而同期物源区岩石类型没有发生明显变化。陆源元素含量的降低是由陆源碎屑含量降低导致的,反映出中更新世过渡期风搬运能力较弱。生物源元素含量的上升主要受生物生产力提高的影响。稀土元素总和(∑REE)的频谱分析显示了元素地球化学对中更新世气候转型的响应,即主导周期从41ka过渡到100ka。
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| 关 键 词： | 中更新世气候转型 稀土元素 物源 周期性 翁通-爪哇海台 |
ELEMENT GEOCHEMICAL RECORD OF THE WESTERN PACIFIC OCEAN SITE ODP807A:IMPLICATION FOR THE MIDDLE PLEISTOCENE CLIMATE TRANSITION |
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| WU Minzhe,QIAO Peijun,SHAO Lei.ELEMENT GEOCHEMICAL RECORD OF THE WESTERN PACIFIC OCEAN SITE ODP807A:IMPLICATION FOR THE MIDDLE PLEISTOCENE CLIMATE TRANSITION[J].Marine Geology & Quaternary Geology,2010(2). |
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| Authors: | WU Minzhe QIAO Peijun SHAO Lei |
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| Institution: | State Key Laboratory of Marine Geology;Tongji University;Shanghai 200092;China |
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| Abstract: | The element geochemical analysis of the upper 60.77 m section of ODP Hole 807A reveals climatic variations since 3.2 Ma.Significant changes in element concentrations during the Middle Pleistocene Transition(MPT)are marked by decreases of elements related closely to terrigenous clasts and increases of biogenic elements.Because there was little change in the provenance of terrigenous elements,variations in the terrigenous clastic content were mainly affected by the reduction itself,indicating the weaker wind ... |
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