干旱区生态环境知识资源中心(Arid): 长江河源区的河水主要元素与Sr同位素来源

Arid

	长江河源区的河水主要元素与Sr同位素来源
其他题名	Origin of major elements and Sr isotope for river water in yangtze river source area
	赵继昌 1; 耿冬青 2; 彭建华 3; 刘丛强 3; 李文鹏 1; 何庆成 1
来源期刊	水文地质工程地质
ISSN	1000-3665
出版年	2003
卷号	30 期号:2 页码:89-93,98
中文摘要	长江源区河水化学成分来自雨雪、蒸发盐岩、碳酸盐岩和硅酸盐岩。主要支流楚玛尔河、北藤河的主要阳离子为Na^+、Ca^2+和MR^2+，占阳离子总量的97%以上．Ca／Na，Mg／Na，K／Na的比值较低，^87Sr／^86Sr为0．70918020～0．71m8011，河水成分以蒸发岩类溶解为主。发源于店古拉山北坡的长江源头，及其支流主要阳离子为Ca^2+，Mg^2+，Na^+占阳离子总量的97%以上，Ca／Na，Mg／Na，K／Na的比值较楚玛尔河等河流高，^87Sr/^86Sr为0．70895420～0.71045518，表现为以碳酸盐岩和硅酸盐岩的溶解为主。计算表明，长江河源区河水中主要化学成分来自蒸发岩中Na^+和Cl^-，在河流水化学成分中占比例最大，长江河水中Cl^-含量从河源区向下游明显逐渐减小，反应出河源区高寒干旱环境下河流蒸发岩的化学侵蚀作用较强的特征。
英文摘要	By analyzing the data, it’ s know that Na~+ and Cl~- are highest concentration in Yangtze River source area. Further more, Cl ~ content of river water drops off markedly from upstream to downstream, which just is the showing of feature that chemical erosion on evaporate is strong relatively in river source area under high sea level-frigid and arid area. Material equilibrium equations are established by analyzing rations of Ca/ Na, Mg/Na, Cl/Na and Sr/Na. Dissolved load of river water primarily come from weathering rocks of silicate, carbonate and evaporate as well as atmosphere rainfall. Of which, Na+ is mostly from silicate and salt, slightly from carbonate rocks dissolution and atmosphere. Ca~+ , Mg~2+ , K~+ and Sr~ + are concerned with all three rocks dissolutions Cl~- is mainly supplied from atmosphere rainfall and salt rock dissolution. Basing on the condition, balance equation can be worked out:Cl-(riv)＝Cl-(rw)＋Cl-(eva)；Z-(riv)＝Z-(rw)＋Z-(sil)＋Z-(car)＋Z-(eva)；Z：Na~＋，Ca~(2＋)，Mg~(2＋) or Sr~(2＋)Corresponding stand balance equation:Cl/Na)-(riv)＝X(Na)-(rw)(Cl/Na)-(rw)＋(1－X)(Na)-(eva)(Cl/Na)-(eva)；(Z/Na)(riv)＝X(Na)-(rw)(Z/Na)-(rw)＋X(Na)-(sil)(Z/Na)-(sil)＋X(Na)-(sil)(Z/Na)-(car)(Z/Na)-(car)＋X(Na)-(eva)(Z/Na)(eva)；The hydrochemistry compouent and isotope fractionation inversion theory is applied to analyze the characteristic for sediment sand, supended and dissolved load. End- member element valuse of silicate and carbonate are confirmed by analyzing the relation between Sr isotope ratio and major element ratio, the element content proportion of different river water in carbonate and silicate can be rough estimate .The elementary compositions of river water in Yangtze River source area, that is derived from rain, snow, evaporate, carbonate and silicate. Major cation, in main tributaries of Tongtian River named Chumar River and Tuotuo River, are Na~+ , Ca~ + and Mg~ + , that is 91% or more in total cation. Ratios of Ca/Na, Mg/Na and
中文关键词	长江河源区 ; 河水化学成分 ; 锶同位素 ; 蒸发盐岩 ; 碳酸盐岩 ; 硅酸盐岩 ; 化学侵蚀作用
英文关键词	Yangtze Rever source area river water erosion major element Sr isotope ratio
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1329364
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204416
作者单位	1.中国地质环境监测院, 北京 100081, 中国; 2.中航勘察设计研究院, 北京 100081, 中国; 3.中国科学院贵阳地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 贵州 550002, 中国
推荐引用方式 GB/T 7714	赵继昌,耿冬青,彭建华,等. 长江河源区的河水主要元素与Sr同位素来源[J],2003,30(2):89-93,98.
APA	赵继昌,耿冬青,彭建华,刘丛强,李文鹏,&何庆成.(2003).长江河源区的河水主要元素与Sr同位素来源.水文地质工程地质,30(2),89-93,98.
MLA	赵继昌,et al."长江河源区的河水主要元素与Sr同位素来源".水文地质工程地质 30.2(2003):89-93,98.