博茨瓦纳马卡迪卡迪盐湖卤水特征及找钾前景分析  

Analysis on the characteristics of Brine in Makgadikgadi Salt Lake of Botswana and its prospects for potassium Exploration

作　　者：栾永大 李博昀[2] 谭登华 巴文艳 LuanYongda;Li Boyun;Tan Denghua;Ba Wenyan(China Chemical Geology and Mine Bureau Shandong Geological Prospecting Institute,Shandong,Jinan,250013,China;China Chemical and Mine Bureau Research Institute of Geological, Beijing, 100101, China;China Chemical Geological and Mine Bureau,Beijing,100013, China)

机构地区：[1]中化地质矿山总局山东地质勘查院,山东济南250013 [2]中化地质矿山总局地质研究院,北京100101 [3]中化地质矿山总局,北京100013

出　　处：《化工矿产地质》2019年第2期90-97,共8页Geology of Chemical Minerals

基　　金：国外矿产资源风险勘查基金项目(项目编号:101041A014)

摘　　要：马卡迪卡迪盐湖区为一现代干盐湖,盐湖以湖相碎屑沉积为主,在东侧的苏阿干盐湖赋存有高矿化孔隙卤水,通过对盐湖卤水系统的采样分析及综合研究,卤水主要化学组分为Na+和Cl-,其次为CO3^-2、HCO3^-,SO4^-2、K^+,矿化度平均为257.96g/L,卤水水化学类型为碳酸盐型;卤水组分与矿化度呈明显的正相关,表明卤水还未达到饱和阶段;受湖区构造及补给来源的影响,卤水的富集区位于研究区的西北部,同时也是矿化度最高的地区;KCl的含量在0.39%~0.99%之间,平均在0.65%,已超过液体钾盐矿的最低工业品位,分布面积约690km2,具有一定找矿前景。Makgadikgadi salt lake area is a modern dry salt lake, which is dominated by lacustrine detrital sediment. There is high mineralized pore brine occurrenced in Suagan salt lake on the east side of Makgadikgadi. Through the sampling, analysis and comprehensive study of brine of salt lake, it is found that there is high mineralized pore brine in Sua Pan salt lake on the east side of the lake. The main chemical components of brine are Na^+ and Cl^-, followed by CO3^-2、HCO3^-,SO4^-2,K^+, the average salinity is 257.96g/L, and the chemical type of brine is carbonate type. There is a significant positive correlation between brine composition and salinity, indicating that the brine has not reached the saturation stage, and the rich area of brine is located in the northwest of the study area, which is also the area with the highest salinity due to the influence of the lake region structure and the source of replenishment. The content of KCl is between 0.39% and 0.999%, with an average of 0.65%, which has exceeded the lowest industrial grade of liquid potash ore, and the distribution area is about 690km2. It has a certain prospect for prospecting.

关 键 词：盐湖卤水 赋存 水化学 找矿前景 

分 类 号：P619.211[天文地球—矿床学]