南极普里兹湾表层沉积物微量元素分布特征及其物源指示意义

发布时间：2018-01-15 22:03

本文关键词：南极普里兹湾表层沉积物微量元素分布特征及其物源指示意义　出处：《沉积学报》2016年02期 　论文类型：期刊论文

【摘要】：利用电感耦合等离子体质谱仪测定了中国南极科考21~27航次期间获取的普里兹湾表层沉积物中Cu、Pb、Zn、Cd、Cr、Co、Al、Fe、Mn的含量,分析了普里兹湾微量元素的分布特征,结合沉积物粒度分布、生物硅含量,并利用富集系数和主成分分析的方法,探讨了微量元素的物源指示意义。研究结果表明:普里兹湾沉积物中的微量元素含量与南大洋其他海域具有很好的可比性。Cu、Zn、Cr、Co、Fe、Mn含量在陆坡深海区明显高于冰架边缘区和陆架区;Al、Pb含量在冰架边缘区较高;而Cd含量在陆架区相对较高。人类活动对普里兹湾沉积物中的微量元素没有明显的影响,南极大陆岩石风化产物和海洋生物源性沉降是其主要来源。冰架边缘区及陆架破折处P2-9站位的微量元素主要为岩源性输入。陆架区、陆坡深海区的微量元素Cu、Zn、Cr、Co、Fe、Mn明显受到生源性物质输入的影响。而普里兹湾沉积物中Cd则主要来源于硅藻的吸收利用及硅质软泥的富集。
[Abstract]:Get China Antarctic expedition 21~27 voyage during the Prydz Bay in the surface sediments of Cu were determined by inductively coupled plasma mass spectrometry, Pb, Zn, Cd, Cr, Co, Al, Fe, Mn content, analysis of the distribution of trace elements in Prydz Bay, with the particle size distribution of sediments, biogenic silica content, and using the method of analysis the enrichment factor and principal components, discusses the source of trace elements indicates significance. Research results show that in sediments of Prydz Bay and other trace elements in the southern ocean waters have good comparability of.Cu, Zn, Cr, Co, Fe, Mn content in the slope of deep sea area was significantly higher than that of the ice shelf edge area and the continental shelf area; Al, Pb content in the ice shelf edge region is relatively high; while the Cd was relatively high in the shelf area. On trace elements in sediments of Prydz Bay of human activity has not obvious effect on the Antarctic continent rock weathering products and marine biological source is the settlement The main source of the ice shelf. The marginal zone and the continental shelf break trace elements folded P2-9 station is the main source rock of input. The shelf area, the trace elements Cu, slope of the deep zones of the Zn, Cr, Co, Fe, Mn were obviously influenced by the source of material input. And in sediments of Prydz Bay Cd mainly from in the diatom accumulation and utilization of siliceous ooze.

【作者单位】：国家海洋局第二海洋研究所;浙江大学;
【基金】：国家自然科学基金项目(41206182;41406219) 中国南北极环境综合调查与评价专项(CHINARE04-04;04-01;01-04)~~
【分类号】：P736.21
【正文快照】： 0引言自然和人为来源的生物化学要素通过生物吸收、化学反应、吸附与解吸附作用、沉降、扩散等过程将最终沉积于海底,因此海底沉积物承载着丰富的生物地球化学信息。海洋沉积物中微量元素的含量及分布特征不但可以反映人类活动对海洋环境的影响[1-4],指示物质来源及其迁移转化

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