ELEMENT GEOCHEMICAL CHARACTERISTIC OF LAKE SEDIMENTS AND ITS INFLUENCE FACTORS IN ULANSUHAI LAKE, INNER MONGOLIA
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摘要: 在210Pb同位素测年的基础上,通过对乌梁素海沉积物元素含量的分析,研究了沉积物中元素的变化规律,探讨了沉积物中元素变化的影响因素,结果表明沉积物中Ca、Sr、Cu、Mn、P等元素随深度加深含量下降,其余元素含量随深度加深呈增加的趋势。通过对元素富集系数的变化规律进行研究后,发现Ca、Sr、Cu、Mn、P等元素的富集系数与其含量变化趋势基本相同,反映了该组元素主要受沉积通量的影响;Al、K、Be、Ba、Mg等富集系数与其含量的变化趋势具明显差异,与黏土含量变化一致;而Cr、Fe、Ni、V、Co、Pb、Zn等重金属元素可能受到黏土吸附作用影响。最后,应用有序样品聚类分析方法,对元素这一环境代用指标在研究湖泊历史演化中的作用进行了探讨,研究表明:在湖泊演化过程中,湖泊的形成、20世纪70年代入湖水量的急剧改变以及近年来河套灌区化肥用量逐年加大、大量生活污水和工业废水排入等人类活动的增强等事件,均在湖泊沉积物元素的变化中有所体现。Abstract: On the basis of 210Pb dating, the variation of elemens was studied for the Ulansuhai Lake sediments. Using the cluster analysis method, the influence factors were also discussed. The results show that some elements, such as Ca, Sr, Cu, Mn, P and so on, declined with depth generally, but the remaining ones had an overall upward increasing trend. By the analysis of enrichment coefficient variations of the lake sediment elements, it was found that the enrichment coefficient of some elements, for example, Ca, Sr, Cu, Mn and P,have the same trend with their contents, suggesting that they was affected by the sediment input. The others, such as Al, K, Be, Ba, Mg, have different trend with their element contents, but were in line with the clay content.Heavy metals, such as Cr, Fe, Ni, V, Co, Pb, Zn, may be affected by clay adsorption. Finally, the ordered specimen cluster analysis method was applied to study the lake environmental changes. It was found that the distribution of sediment elements shows some kinds of environmental events in the process of lake evolution, such as the lake formation, the abrupt change in water quality in 1970s and the discharge of domestic sewage and industrial wastewater into the lake in recent years and so on.
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Key words:
- element geochemistry /
- enrichment factor /
- ordered specimen cluster analysis /
- Ulansuhai Lake /
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[1] Heinrich D Holland,Karl K Turekian.Treatise on Geochemistry[M].Elsevier Ltd.,2007:67-105.
[2] Birch L,Hanselmann K W,Bachofen R.Heavy metal conservation in Lake Cadagno sediments:Historical records of anthropogenic emissions in a meromictic alpine lake[J].Water Research,1996,30(3):679-687.
[3] 曾海鳌,吴敬禄.50年来抚仙湖重金属污染的沉积记录[J].第四纪研究,2007,27(1):128-132.
[ZENG Haiao,WU Jinglu.Recent fifty-year sedimentary record of heavy metal pollution in the Fuxian Lake[J].Quaternary Sciences,2007,27(1):128-132.]
[4] 王天顺.河套史/黄河文明[M].北京:人民出版社,1998:7-9.[WANG Tianshun.Hetao History/Yellow River Civilization[M].Beijing:People's Publishing House,1998:7
-9.]
[5] 张敬,牟德海,杜金洲,等.过剩210Pb年代学的多种计算模式的比较研究[J].海洋环境科学,2008,27(4):370-374
,382.[ZHANG Jing,MU Dehai,DU Jinzhou,et al.Study on comparison of excess 210Pb chronology of several models[J].Marine Environmental Science,2008,27(4):370-374,382.]
[6] 万国江.现代沉积的210Pb计年[J].第四纪研究,1997,17(3):230-239.
[WAN Guojiang.210Pb dating for recent sedimentation[J].Quaternary Sciences,1997,17(3):230-239.]
[7] 陈骏,季峻峰,仇纲,等.陕西洛川黄土化学风化程度的地球化学研究[J].中国科学D辑,1997,27(6):531-536.
[CHEN Jun,JI Junfeng,QIU Gang,et al.Geochemical studies on the intensity of chemical weathering in Luochuan loess sequence,China[J].Science in China(Series D),1997,27(6):531-536.]
[8] SUN Liguang,XIE Zhouqing,ZHAO Junlin.Palaeoecology:A 3000-year record of penguin populations[J].Nature,2000,407:858.
[9] 王喜宽,黄增芳,苏美霞,等.河套地区土壤基准值及背景值特征[J].岩矿测试,2007,26(4):287-292.
[WANG Xikuan,HUANG Zengfang,SU Meixia.Characteristics of reference and background values of soils in hetao area[J].Rock and Mineral Analysis,2007,26(4):287-292.]
[10] Herbert L Windom,Steven J Schropp,Fred D Calder,et al.Natural trace metal concentrations in estuarine and coastal marine sediments of the southeastern United States[J].Environ.Sci.Technol.,1989,23(3):314-320.
[11] Ian W Croudace,Andrew B Cundy.Heavy metal and hydrocarbon pollution in recent sediments from Southampton Water,southern England:A geochemical and isotopic study[J]. Environ.Sci.Technol.,1995,29(5):1288-1296.
[12] 陈静生,王飞越,陈江麟.论小于63μm粒级作为水体颗粒物重金属研究介质的合理性及有关粒级转换模型研究[J].环境科学学报,1994,14(4):419-425.
[CHEN Jingsheng,WANG Feiyue,CHEN Jianglin.Relation of aquatic particulate grain size to heavy metals concentrations in eastern Chines rivers[J].Acta Scientiae Circumstantiae,1994,14(4):419-425.]
[13] Chapman D.Water Quality Assessments:A Guide to the Use of Biota,Sediments and Water in Environmental Monitoring[M].2nd ed.Cambridge:E&FN Spon,1996:329-370.
[14] 韩金炎.数学地质[M].北京:煤炭工业出版社,1987:212-222.[HAN Jinyan.Mathematical geology[M].Beijing:China Coal Industry Press,1987:212
-222.]
[15] 韩翠连,武石军.总排干沟排退水质变化及对乌梁素海湿地的影响[J].内蒙古水利,2005(3):79-82.[HAN Cuilian,WU Shijun.Water quality change of main drainage of Hetao plain and its influences on Ulansuhai marsh[J].Inner Mongolia Water Conservancy,2005
(3):79-82.]
[16] 中国科学院内蒙古宁夏综台考察队.内蒙古自治区及其东部毗邻地区水资源及其利用[M].北京:科学出版社,1982:41-42.[Integrated team of Chinese Academy of Sciences,Inner Mongolia,Ningxia Hui Autonomous Region team.Water resources and uses of the Inner Mongolia Autonomous Region and its adjacent areas[M].Beijing:Science Press,1982:41
-42.]
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