基于主导离子分类的呼和浩特盆地浅层地下水化学特征研究
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摘要
根据主要离子的毫克当量百分比是否超过50%,将呼和浩特盆地浅层地下水化学类型划分为主导离子型和无主导离子型,并在此基础上利用Piper三线图和各种离子比例系数对研究区浅层地下水的化学特征进行了研究。结果表明,浅层地下水阳离子水化学类型具有较强的水平分带性,阴离子中HCO3主导型水分布十分广泛。Ca主导型水全部为HCO3主导的低矿化度水,主要受溶滤作用控制;大黑河冲湖积平原中西部HCO3主导的Na主导型水的形成受阳离子交换作用和脱硫酸作用影响,该区域湖相沉积环境为其提供了有利的物质基础和环境条件;无主导阳离子型水和Mg主导型水的水化学组成是Ca主导型水向Na主导型水演化的中间状态。
The chemical types of the shallow groundwater in Hohhot basin were classified into dominant ion types and non-dominant ion types according to whether the percentage of milliequivalent of major ions exceeded50%. The chemical characteristics of shallow groundwater was studied by Piper diagram and ion ratios on the basis of that classification. The results indicated that the chemical types of cation in shallow groundwater showed strong horizontal zonation,and the anion type of HCO3 dominant groundwater was widely distributed in study area. The Ca dominant groundwater with low TDS was also HCO3 dominated,which was controlled by lixiviation.The formation of Na dominate groundwater with HCO3 dominated of anion distributed in the west-central part of the Daheihe alluvial-lacustrine plain was affected by the cation exchange and desulfurization. The lacustrine sedimentary environment provided the favorable material foundation and environment condition; The chemical composition of non-dominant cation type and Mg dominant groundwater was the intermediate state of the evolution from the Ca dominant groundwater to the Na dominant groundwater.
The chemical types of the shallow groundwater in Hohhot basin were classified into dominant ion types and non-dominant ion types according to whether the percentage of milliequivalent of major ions exceeded50%. The chemical characteristics of shallow groundwater was studied by Piper diagram and ion ratios on the basis of that classification. The results indicated that the chemical types of cation in shallow groundwater showed strong horizontal zonation,and the anion type of HCO3 dominant groundwater was widely distributed in study area. The Ca dominant groundwater with low TDS was also HCO3 dominated,which was controlled by lixiviation.The formation of Na dominate groundwater with HCO3 dominated of anion distributed in the west-central part of the Daheihe alluvial-lacustrine plain was affected by the cation exchange and desulfurization. The lacustrine sedimentary environment provided the favorable material foundation and environment condition; The chemical composition of non-dominant cation type and Mg dominant groundwater was the intermediate state of the evolution from the Ca dominant groundwater to the Na dominant groundwater.
引文
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[3]孙言.洱源温泉水水文地球化学特征分析[J].环境与发展,2017(9):110-111.
[4]Kaka E A,Nartey T,Bam E,et al. Hydrochemistry and evaluation of groundwater suitability for irrigation and drinking purposes in the southeastern Volta river basin:Manya Krobo area,Ghana[J]. 2011,39:4793-4807.
[5]孙一博,王文科,段磊,等.关中盆地浅层地下水地球化学的形成演化机制[J].水文地质工程地质,2014,41(3):29-35.
[6]张泽鹏,朱玉晨,郝奇琛,等.呼和浩特盆地地下水流系统变异机制及其资源效应[J].水文地质工程地质,2017(2):63-68.
[7]Guo H M,Wang Y X. Geochemical characteristics of shallow groundwater in Datong basin,northwestern China[J]. Journal of Geochemical Exploration,2005,87(3):109-120.
[8]Aghazadeh N,Mogaddam A A. Investigation of hydrochemical characteristics of groundwater in the Harzandat aquifer,Northwest of Iran[J]. Environmental Monitoring&Assessment,2011,176(1-4):183-195.
[9]钱诗友,曾溅辉.东营凹陷沙河街组地层水化学特征及其石油地质意义[J].天然气地球科学,2009,20(4):603-609.
[10]姜文娟,冯乔,李颖莉,等.苏里格西部盒8段地层水化学特征及其地质意义[J].新疆石油地质,2011(4):399-401.
[11]胡鹏,于兴河,王娇,等.鄂尔多斯盆地东南部本溪组地层水化学特征与天然气成藏意义[J].西北大学学报:自然科学版,2017,47(1):92-100.
[12]闫志为,韦复才.地下水中CO2的成因综述[J].中国岩溶,2003,22(2):118-123.
[13]冯海波,董少刚,史晓珑,等.内蒙古托克托县潜水与承压水中氟化物的空间分布特征及形成机理[J].现代地质,2016,30(3):672
[14]杨丽芝,林尚华,佟照辉,等.华北平原中部重碳酸钠型水的成因探讨[J].水资源与水工程学报,2013,24(6):34-37.
[15]邓娅敏.河套盆地西部高砷地下水系统中的地球化学过程研究[D].武汉:中国地质大学(武汉),2008.
[16]刘晓波,董少刚,刘白薇,等.内蒙古土默川平原地下水水文地球化学特征及其成因[J].地球学报,2017,38(6):919-929.
[17]Wang Y X,Shvartsev S L,Su C L. Genesis of arsenic/fluoride-enriched soda water:A case study at Datong,northern China[J]. Applied Geochemistry,2009,24(4):641-649.
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