贺兰山至吉兰泰盐湖的水化学特征及演化规律

摘要/Abstract

摘要： 在对吉兰泰盐湖南部地下水化学组分特征分析的基础上,利用PHREEQC软件对水文地球化学演化规律进行模拟研究。结果表明,从贺兰山西侧山前到吉兰泰盐湖,水化学类型由HCO-3型过渡到Cl-—SO2-4型、最后变为Cl-型;Ca2+、Mg2+与SO2-4相关分析表明发生石膏溶解出的Ca2+置换了MgCO3中Mg2+,从而产生了CaCO3沉淀的水岩反应,而白云石、石膏、岩盐、CO2(g)的溶解是常量离子增加的物质来源,同时伴有强烈的蒸发浓缩作用及阳离子交换作用。特别是深层地下水具有较高的mNa/Cl值与较低的mCa/Na值,表明发生强烈的阳离子交换作用,这对认识吉兰泰盐湖地区及干旱区沙漠地区水体发生的水岩相互作用与演化机制具有借鉴作用。

关键词: 水化学特征, 演化规律, PHREEQC软件模拟, 吉兰泰盐湖, 贺兰山

Abstract: The PHREEQC software is applied to simulate the groundwater spatial pattern from the Helan Mountain to the Jilantai Salt Lake based on analysis of hydrochemical properties. Results show that groundwater evolves gradually from HCO-3 type to Cl--SO2-4 type and eventually to Cl- type from the front of western Helan Mountain to Jilantai Salt Lake. Correlation between Ca2+, Mg2+ and SO2-4 shows that Ca2+, which dissolved from gypsum, substitutes Mg2+ of MgCO3, so that CaCO3 is produced in the process. The increase of major ions comes from the dissolution of dolomite, gypsum, halite and CO2(g), which is strongly influenced by evaporation and cation exchange process. The deep groundwater have high value of mNa/Cl (2.12) and low value of mCa/Na(0.09), which indicate a dramatic cation exchange process. It is very helpful to the understanding of the water-rock interactions and groundwater evolution in the arid desert zone and Jilantai Salt Lake.

Key words: hydrochemical properties, evolution law, PHREEQC simulation, Jilantai Salt Lake, Helan Mountain

中图分类号:

P641

魏国孝;朱锡芬;马金珠;许翔;徐涛. 贺兰山至吉兰泰盐湖的水化学特征及演化规律[J]. 中国沙漠, 2011, 31(5): 1330-1336.

WEI Guo-xiao;ZHU Xi-fen;MA Jin-zhu;XU Xiang;XU Tao. Hydrogeochemical Properties and Evolution of Groundwater from Helan Mountain to Jilantai Salt Lake[J]. JOURNAL OF DESERT RESEARCH, 2011, 31(5): 1330-1336.

参考文献

[1]Garrels R M,Thompson M E.A chemical model for sea water at 25 ℃and one atmosphere total pressure[J].American Journal of Science.1962,60:57-66.
[2]Abu-Jaber N,Ismail M.Hydrogeochemical modeling of the shallow groundwater in the northern Jordan Valley[J].Environmental Geology,2003,44:391-399.
[3]Causape J,Auque L,Gimeno M J,et al.Irrigation effects on the salinity of the Arba and Riguel Rivers(Spain):present diagnosis and expected evolution using geochemical models[J].Environmental Geology,2004,45:703-715.
[4]Ma J Z,Wang X S,Edmunds W M.The characteristics of ground-water resources and their changes under the impacts of human activity in the arid Northwest China:a case study of the Shiyang River Basin[J].Journal of Arid Environments,2005,61:277-295.
[5]张应华,仵彦卿.黑河流域中游盆地地下水补给机理分析[J].中国沙漠,2009,29(2):370-375.
[6]郭永海,沈照理,钟佐燊.河北平原地下水化学环境演化的地球化学模拟[J].中国科学(D辑),1997,27(4):360-365.
[7]刘志明,刘少玉,王贵玲.新疆玛纳斯河流域平原地下水水-岩作用模拟[J].地质学报,2006,80(6):885-892.
[8]石培泽,马金珠,赵华.民勤盆地地下水地球化学演化模拟[J].干旱区地理,2004,27(3):305-309.
[9]Edmunds W M,Ma J Z,Aeschbach-Hertig W,et al.Groundwater recharge history and hydrogeochemical evolution in the Minqin Basin,North West China[J].Applied Geochemistry,2006,21:2148-2170.
[10]杜虎林,肖洪浪,郑威,等.塔里木沙漠油田南部区域地表水与地下水水化学特征[J].中国沙漠,2008,28(2):388-394.
[11]Ma J Z,Edmunds W M,He J H,et al.A 2000 year geochemical record of palaeoclimate and hydrology derived from dune sand moisture[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2009,276:38-46.
[12]蒋志荣,安力,柴成武.民勤县荒漠化影响因素定量分析[J].中国沙漠,2008,28(1):35-38.
[13]Chen J S,Li L,Wang J Y,et al.Water resources:Groundwater maintains dune landscape[J].Nature,2004,432:459-460.
[14]春喜,陈发虎,范育新,等.乌兰布和沙漠的形成与环境变化[J].中国沙漠,2007,27(6):927-931.
[15]Gates J B,Edmunds W M,Darling W G,et al.Conceptual model of recharge to southeastern Badain Jaran Desert groundwater and lakes from environmental tracers[J].Applied Geochemistry,2008,23:3519-3534.
[16]刘兴起,葛文胜.吉兰泰盐湖区域地质特征及其形成演化的遥感解译[J].海洋与湖沼,2002,33(2):145-150.
[17]庞西磊,胡东生.近22 ka以来吉兰泰盐湖的环境变化及成盐过程[J].中国沙漠,2009,29(2):193-199.
[18]中国气象局国家气象信息中心.中国气象科学数据共享服务网[DB/OL].Copyright@2003-2006.http://cdc.cma.gov.cn/.
[19]耿侃,胡春元,刘佳.吉兰泰地区第四纪湖泊的演变[J].干旱区资源与环境,1989,39(2):26-33.
[20]耿侃,陈育峰.吉兰泰盐湖的形成、发育和演化[J].地理学报,1990,45(3):341-349.
[21]李义连,王焰新,周来茹,等.地下水矿物饱和度的水文地球化学模拟分析——以娘子关泉域岩溶水为例[J].地质科技情报,2002,21(1):32-36.