干旱区生态环境知识资源中心(Arid): 小柴旦盐湖相淤泥水化学特征分析①

Arid

	小柴旦盐湖相淤泥水化学特征分析①
其他题名	Analysis on Hydrochemistry Characteristic of Mud Water in Xiao Qaidam Lake
	杜尧 1; 马腾 2; 肖骢 1; 陈柳竹 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2016
卷号	33 期号:1 页码:94-100
中文摘要	研究内陆干旱区盐湖相淤泥水化学特征,对于深入认识干旱区淤泥早期成岩过程中的水- 岩相互作用具有重要意义。以我国西北干旱区小柴旦盐湖相淤泥水为研究对象,分析淤泥水的化学特征,探讨其对早期成岩过程中水- 岩相互作用的指示意义。结果显示: 不同深度盐湖相淤泥水的各化学组分含量均普遍高于上覆湖水,淤泥水盐度的升高与近地表强烈的蒸发作用和湖滩析盐后再溶解作用有关。不同深度淤泥水的Na~+、K~+、Li~+ 和Cl~-含量变化范围较小,Mg~(2+)、Ca~(2+)、Sr~(2+)、SO_4~(2-)、I~-、TOC及TNb变动范围较大,Br~-和B~(3+)随深度增加有一定程度的减少。淤泥在早期成岩过程中即发生了一定程度的水- 岩作用和生物化学作用,其主要过程包括: 浅地表的强烈蒸发、蒸发岩矿物沉淀、阳离子交换、硫酸盐还原菌作用下的脱硫酸过程、有机质降解等。
英文摘要	The research on chemical characteristics of salt lake mud water in inland arid area is of great importance on understanding water-rock interaction during early diagenesis of mud sediment in arid area deeply. The present study took Xiao Qaidam salt lake mud water in arid area of northwest of China as the research object and analyzed the chemical characteristics of mud water,indicator of which to water-rock interaction during early diagenesis was discussed. The results indicate that the each chemical component content of mud water in different depth is generally higher than that of overlying salt lake water,which is different from that of marine mud water. The rising of salinity for salt lake mud water is owing to intense evaporation near surface and redissolution of salt precipitation in lakeshore. The Na~+、K~+、Li~+ and Cl~- content of mud water in different depth varies little,while the varying ranges of Mg~(2+)、Ca~(2+)、Sr~(2+)、SO_4~(2-)、I~-、TOC and TNb are relatively large and the of Br~- and B~(3+) content exhibits moderate decrease with increasing depth. The water-rock interaction and biochemical action have occurred to some degree during early diagenesis of mud sediment. The possible main processes include extensive evaporation in shallow surface,precipitation of evaporite mineral,cation exchange,desulphidation and organic matter degradation.
中文关键词	淤泥水 ; 水化学特征 ; 水- 岩作用 ; 小柴旦盐湖
英文关键词	mud water hydrochemistry characteristic water-rock interaction Xiao Qaidam Lake
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:5623656
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234291
作者单位	1.(武汉)中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉, 湖北 430074, 中国; 2.(武汉)中国地质大学(武汉)环境学院, 武汉, 湖北 430074, 中国
推荐引用方式 GB/T 7714	杜尧,马腾,肖骢,等. 小柴旦盐湖相淤泥水化学特征分析①[J],2016,33(1):94-100.
APA	杜尧,马腾,肖骢,&陈柳竹.(2016).小柴旦盐湖相淤泥水化学特征分析①.干旱区研究,33(1),94-100.
MLA	杜尧,et al."小柴旦盐湖相淤泥水化学特征分析①".干旱区研究 33.1(2016):94-100.