| 赤道东北太平洋沉积物中生物钡的分布特征 |
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| 引用本文： | 倪建宇,张美,周怀阳.赤道东北太平洋沉积物中生物钡的分布特征[J].海洋地质与第四纪地质,2006,26(2):49-54. |
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| 作者姓名： | 倪建宇 张美 周怀阳 |
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| 作者单位： | 1. 国家海洋局,海底科学重点实验室,国家海洋局,第二海洋研究所,杭州,310012
2. 中国科学院,广州地球化学研究所,广州,510640 |
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| 基金项目： | 国家自然科学青年基金项目(40206012)，国家海洋局青年海洋科学基金项目(2002601)，同济大学海洋地质国家重点实验室基金，大洋矿产资源勘探开发专项基金项目(Dy105-02-01) |
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| 摘 要： | 分析了赤道东北太平洋海域沉积物中Ba、Ti、Al和有机碳(Corg)的含量。研究表明,研究区沉积物中钡为0.198%~0.792%;采用标准陆源物质扣除法获得的生物钡(Babio)的含量为0.162%~0.764%,占沉积物中总钡含量的81.6%~96.5%,平均为88.7%,其在沉积物中的分布表现为上部一致,下部变化较大;有机碳(Corg)的含量为0.18%~0.58%,并表现为随沉积物深度的增加而降低。沉积物中Babio/Ti的比值表现为东区高于西区,且向高纬度降低的特点,而沉积物中Corg/Ti和Babio/Ti则表现为负相关关系,表明研究区沉积物中钡可能和上层海洋生产力的相关性不明显。
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| 关 键 词： | 生物钡 有机碳 赤道东北太平洋 |
| 文章编号： | 0256-1492(2006)02-0049-06 |
| 修稿时间： | 2005年5月7日 |
BIOGENETIC BARIUM DISTRIBUTION IN EQUATORIAL NORTHEASTERN PACIFIC SEDIMENTS |
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| NI Jian-yu,ZHANG Mei,ZHOU Huai-yang.BIOGENETIC BARIUM DISTRIBUTION IN EQUATORIAL NORTHEASTERN PACIFIC SEDIMENTS[J].Marine Geology & Quaternary Geology,2006,26(2):49-54. |
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| Authors: | NI Jian-yu ZHANG Mei ZHOU Huai-yang |
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| Abstract: | Ba,Ti,Al and organic carbon contents of sediments from the abyssal Equatorial Northeastern Pacific were analyzed by ICP-AES and Elements Analyzer respectively.The Ba content varied between 0.198% and 0.792%.Biogenic barium(Ba_(bio)) calculated using normative calculation varied between 0.162% and 0.764%,which was up to 81.6% and 96.5% of total barium in the sediments.The Ba_(bio) distributions in sediment profile show little variation in the upper sections,but large variations in lower sections.This suggests that the sediment setting perhaps changed since Tertiary in the region.The organic carbon(C_(org)) contents varied between 0.18% and 0.58%,and decreased with sediment depth increasing.The Ba_(bio)/Ti ratio in eastern zone sediments is higher than that of western zone.The Ba_(bio)/Ti ratio also decreased with latitude increasing in the area.The C_(org)/Ti ratio and Ba_(bio)/Ti ratio display negative correlation,suggesting that there is little obvious correlation between surface oceanic nutrition level and Ba_(bio) contents of sediments in the region.So we should pay more attention to the application of biogenetic barium to paleoproductivity research. |
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| Keywords: | biogenetic barium organic carbon Equatorial Northeastern Pacific |
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