| NS93 5钻孔沉积物高分辨率过渡金属元素变化及其古海洋记录 |
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| 引用本文： | 韦刚健,李献华,陈毓蔚,刘颖,陈木宏.NS93 5钻孔沉积物高分辨率过渡金属元素变化及其古海洋记录[J].地球化学,2001,30(5):450-458. |
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| 作者姓名： | 韦刚健 李献华 陈毓蔚 刘颖 陈木宏 |
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| 作者单位： | 1. 中国科学院广州地球化学研究所,
2. 中国科学院南海海洋研究所, |
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| 基金项目： | 国家自然科学基金重大项目(49999560)，“九五”国家专项南沙群岛及其邻近海域综合科学考察项目(97-926-03-03) |
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| 摘 要： | 利用电感耦合等离子体质谱（ICP－MS）法分析了取自南沙南部陆坡的NS93－5钻孔沉积物的部分过渡金属元素含量的变化。结果表明，代表碎屑物质的量的Ti含量在不同气候时期变化明显，其中在氧同位素第4期碎屑比例最大，第2期和第3期末期，碎屑所占比例比较高，代表较大的碎屑输入通量。但与沉积速率相比较发现，NS93－5的沉积速率并不仅仅决定于碎屑的输入，自生沉积物的累积作用也极为明显。Mn、Mo、Cr、V、U、Cd、Co、Ni、Cu和Zn等元素含量变化表明，NS93－5钻孔沉积物中还原状态极低。反映出自过去15ka以来该区陆坡深度底层海水均富含氧气，并没有出现无氧状态，意味着南沙海域底层海水更新一直都比较快。
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| 关 键 词： | 过渡金属元素 钻孔沉积物 古海洋信息 电感耦合等离子质谱法 海洋地球化学 南沙群岛 |
| 文章编号： | 0379-1726(2001)05-0450-09 |
| 修稿时间： | 2000年7月18日 |
High resolution records of transitive metals of sediments from Core NS93 5 and their paleoceanography implications |
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| WEI Gang jian,LI Xian hua,CHEN Yu wei,LIU Ying,CHEN Mu hong.High resolution records of transitive metals of sediments from Core NS93 5 and their paleoceanography implications[J].Geochimica,2001,30(5):450-458. |
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| Authors: | WEI Gang jian LI Xian hua CHEN Yu wei LIU Ying CHEN Mu hong |
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| Institution: | WEI Gang jian1,LI Xian hua1,CHEN Yu wei1,LIU Ying1,CHEN Mu hong2 |
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| Abstract: | Contents of some transitive metals of the sediments of Core NS93 5 from Nansha Islands, South China Sea, are measured by inductively coupled plasma mass spectrometry (ICP MS). The content of titanium, representing the relative abundance of terrestrial detritus, changes significantly during different climatic periods. In details, the highest Ti contents occurred during Stage 4, also higher during Stage 2 and the late Stage 3, indicating larger terrestrial fluxes. However, comparison between the Ti contents and the sediment accumulating rates indicates that the sediment accumulating rates of Core NS93 5 are not onlydetermined by terrestrial fluxes, but the authigenic sediments also contributedmuch. Variations of Mn, Mo, Cr, V, U, Cd, Co, Ni, Cu and Zn contents exhibit that the reduce status with the sediments of Core NS93 5 are very low. Therefore, it can be drawn that the deep water at slope depth in South China Sea were always oxic during the last 150 ka, and without any suboxic periods. This indicatesthat the recruit of the deep water of the South China Sea were always sufficient. |
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| Keywords: | transitive metal elements deep sea sediments paleoceanography Nansha |
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