摘要
CaCl_(2)卤水是一种特殊类型的卤水,其Ca含量较高,几乎不含CO 3和HCO 3,SO 4含量极少,伴生多种高值资源元素。主要分布于各大沉积盆地,洋中脊热液和大陆构造活动带。CaCl_(2)卤水的形成是一个复杂的水文地球化学过程,成因机制可能包括热液、成岩作用(白云岩化、钠长石化、硫酸盐还原、碳酸盐溶解等)、古海水继承、混合掺杂等。CaCl_(2)卤水对于盆地成盐成钾过程有着重要的意义,使盐沉积序列(石膏—石盐—钾石盐—光卤石)简单,并伴随标型矿物(溢晶石、南极石、硼酸盐等)的出现,K元素在卤水中的富集。CaCl_(2)卤水成因较复杂,借助于新手段及室内模拟实验与计算,应进一步开展其水源、溶质源及形成机制的研究。此外,CaCl_(2)卤水作为一种重要的矿产资源,对某一具体盆地该资源禀赋特征、赋存条件及迁移成藏机制仍需进一步理清。
Calcium-chloride brine is a special type of brine with high Ca,little SO 4 and virtually no CO 3 and HCO 3.A variety of valuable resource elements(K,B,Li,Sr,Br,I,etc.)are enriched in the brine.It mainly distributed in sedimentary basins,mid-ocean ridges and continental tectonic active regions.The formation of CaCl_(2) brine is a complex hydrogeochemical process,and possible genetic mechanisms include hydrothermal,diagenesis(dolomitization,albitization,sulfate reduction,carbonate dissolution,etc.),inheritance of ancient CaCl_(2) seawater,mixing of different waters.CaCl_(2) brine is of great significance to the formation of salt deposits in the basins.It makes for the simple salt mineral sequences(gypsum-halite-sylvite-carnallite)accompanied by specialized minerals(tachyhydrite,antarcticite,borate,etc.),and contributes to the enrichment of K in brine.With the assistance of new methods and laboratory simulated experiments,further research on the water source,solute source and formation mechanism of CaCl_(2) brine should be carried out.In addition,as an important resource,the endowment characteristics,occurrence conditions,and migration-accumulation mechanism of the CaCl_(2) brine still need to be further clarified.
作者
樊启顺
李建森
秦占杰
李庆宽
FAN Qi-shun;LI Jian-sen;QIN Zhan-jie;LI Qing-kuan(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes,Xining,810008,China)
出处
《盐湖研究》
CAS
CSCD
2021年第1期1-9,共9页
Journal of Salt Lake Research
基金
国家自然科学基金(41872093,41972258,42072097)资助。
