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	楚科奇海陆架重金属沉积研究
	马豪 ; 曾实 ; 陈立奇 ; 何建华 ; 尹明端 ; 曾宪章 ; 曾文义 ; MA Hao ; ZENG Shi ; CHEN Li-qi ; HE Jian-hua ; YIN Ming-duan ; ZENG Xian-zhang ; ZENG Wen-yi
	2010-05-12 ; 2010-05-12
关键词	沉积速率 重金属 中子活化分析 楚科奇海 北极 sedimentary rate heavy metals INAA Chukchi Sea Arctic P736.41
其他题名	History of heavy metals recorded in the sediment of the Chukchi Sea,Arctic
中文摘要	采用Pb-Po法测定了楚科奇海陆架沉积物中210Pb的垂直剖面.应用双层模型研究210Pb分布,得到沉积速率(S)为0.145cm/a,沉积物堆积通量(FM)为78mg/(cm2.a),过剩210Pbex的沉积通量为6×10-3Bq/(cm2.a)[即0.36dpm/(cm2.a)].用中子活化分析方法和火焰原子吸收法分析测定了沉积物岩芯12个层段的重金属Cu、Pb、Zn、Cd、Cr、Co、Fe、Mn和V的含量,发现各层段之间重金属含量没有显著的区别.将本次分析结果和北冰洋其他一些陆架区的研究结果及页岩标准值相比较,发现楚科奇海沉积物中大部分重金属含量都相对较低.基于此可以推断,楚科奇海沉积物中重金属是源于地球化学过程的作用,没有表现出受到明显的人为重金属污染影响.; The vertical profile of 210Pb in the sediment of the Chukchi Sea was determined by Pb-Po isotopic technique.By using a two-layer model to study the distribution of 210Pb,the sedimentary rate(S),accumulation flux of sediment(FM) and sedimentary flux of excess 210Pbex were estimated to be 0.145cm/a,78mg/(cm2穉) and 6�0-3Bq/(cm2穉) [0.36dpm/(cm2穉)],respectively.The changes in heavy metals(Cu,Pb,Zn,Cd,Cr,Co,Fe,Mn and V) contents in 12 layers of the sedimentary core were analyzed and determined by instrumental neutron activation analysis(INAA) and flame atomic absorption method.It was found that the concentrations of the heavy metals in varied layers had no significant difference.Comparing the results with those of other Arctic shelf regions and the main value of the shale,the content of the heavy metals is lower.It was concluded that the source of heavy metals in the sediment of the Chukchi Sea was from natural geochemical process and no significant anthropogenic contribution was detected in the Chukchi Sea sediments.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/29455]
专题	清华大学
推荐引用方式 GB/T 7714	马豪,曾实,陈立奇,等. 楚科奇海陆架重金属沉积研究[J],2010, 2010.
APA	马豪.,曾实.,陈立奇.,何建华.,尹明端.,...&ZENG Wen-yi.(2010).楚科奇海陆架重金属沉积研究..
MLA	马豪,et al."楚科奇海陆架重金属沉积研究".(2010).

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