博茨瓦纳马卡迪卡迪盐湖卤水特征及找钾前景分析
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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CO_3~(2-)、HCO_3~-,SO_4~(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 CO_3~(2-),HCO_3~-,SO_4~(2-), K~+, the average salinity is 257.96 g/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 690 km2. It has a certain prospect for prospecting.
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 CO_3~(2-),HCO_3~-,SO_4~(2-), K~+, the average salinity is 257.96 g/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 690 km2. It has a certain prospect for prospecting.
引文
1宋国明.博茨瓦纳矿业开发与投资环境[J].国土资源情报,2006(5):21-25
2 G.Stansfield.,B.Sc.The Geology of The Area Around Dukwe And Tlalamabele.Central Districts,Botswana[R].Gaborone:Geological Survey Department Ministry of Mineral Resources and Water Affairs Republic of Botswana,1973
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4李博昀,刘振敏,徐少康,等.腾格里沙漠地区盐湖卤水水化学特征[J].化工矿产地质,2002,24(1):33-38
5赵玉海,商朋强,李博昀,等,吉布提阿萨勒(ASSAL)盐湖的卤水钾盐矿床赋存特征[J].化工矿产地质,2015,37(3):163-167
6 Ringrose S,Huntsmanmapila P,Kampunzu A B,et al.Sedimentological and geochemical evidence for palaeo-environmental change in the Makgadikgadi subbasin,in relation to the MOZ rift depression,Botswana[J].Palaeogeography Palaeoclimatology Palaeoecology,2005,217(3):265-287.
7王春男,郭新华,马明珠,等.察尔汗盐湖钾镁盐矿床成矿地质背景[J].西北地质,2008,41(1):97-106
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9王新民,袁崇清,陈建中.罗北凹地钾盐矿区潜卤水组分分布及动态特征[J].西部探矿工程,2003,15(11):37-38,40
10徐少康.现代盐湖晶间卤水分异成因的新观点阶段性淡化说-以中国查尔汗为例[J].化工矿产地质,1996,18(2):113-123
2 G.Stansfield.,B.Sc.The Geology of The Area Around Dukwe And Tlalamabele.Central Districts,Botswana[R].Gaborone:Geological Survey Department Ministry of Mineral Resources and Water Affairs Republic of Botswana,1973
3张晨鼎.博茨瓦纳天然碱的开发现状[J].纯碱工业,2006(4):3-6
4李博昀,刘振敏,徐少康,等.腾格里沙漠地区盐湖卤水水化学特征[J].化工矿产地质,2002,24(1):33-38
5赵玉海,商朋强,李博昀,等,吉布提阿萨勒(ASSAL)盐湖的卤水钾盐矿床赋存特征[J].化工矿产地质,2015,37(3):163-167
6 Ringrose S,Huntsmanmapila P,Kampunzu A B,et al.Sedimentological and geochemical evidence for palaeo-environmental change in the Makgadikgadi subbasin,in relation to the MOZ rift depression,Botswana[J].Palaeogeography Palaeoclimatology Palaeoecology,2005,217(3):265-287.
7王春男,郭新华,马明珠,等.察尔汗盐湖钾镁盐矿床成矿地质背景[J].西北地质,2008,41(1):97-106
8单慧梅,马腾,谭婷,等.博茨瓦纳Sua盐湖地下卤水来源及成因[J].地球科学-中国地质大学学报,2013,38(3):608-613
9王新民,袁崇清,陈建中.罗北凹地钾盐矿区潜卤水组分分布及动态特征[J].西部探矿工程,2003,15(11):37-38,40
10徐少康.现代盐湖晶间卤水分异成因的新观点阶段性淡化说-以中国查尔汗为例[J].化工矿产地质,1996,18(2):113-123