摘要
达拉特旗芒硝矿是世界上罕见的特大型优质芒硝矿,赋存于中更新统中段、上段地层中。共有矿体(层)3个,分别为I、II、III矿体(层),呈层状近平行产出。其中以I矿体(层)为主,其平均厚度为13.89 m,厚度变异系数为43.23%;Na2SO4平均品位为33.81%,品位变异系数为12.65%。矿层结构较简单,夹层数量较少。矿石由可溶盐与水不溶物(泥沙)组成,其中可溶盐99%由Na2SO4·10H2O组成。另外,本文从盆地和水系的发展史、物质来源、古气候、古地理等方面,对矿床成因进行了初步分析探讨,认为达拉特旗德胜太芒硝矿属第四纪掩埋型-内陆湖相蒸发-化学沉积芒硝矿床。
The mirabilite ore in Dalad county is the largest mirabilite ore with high quality in the world, which occured in the middle and upper strata of the Pleistocene. There are 3 ore beds which are named as I, II and III. The ore bodies are occurred as bed and nearly being parallel. The main ore bed is body I, with the thickness of 5.16～23.92 m, which averaged to be 13.89 m, and the coefficient of variation of thickness is 43.23%. The grade of Na2SO4 is in the range of 21.87%～40.25%, which averaged to be 33.81%, and the coefficient of variation of the grade of Na2SO4 is 12.65%. The constituent of the ore is relatively simple, and the the intercalated beds are much fewer. The constituents of the ore are mainly soluble salt and insoluble materials （silt and sand）, and 99% of the soluble salt is composed of the sodium sulfate decahydrate with the chemical formula Na2SO4·10H2O. The genesis of the solid mirabilite ore is assumed to be from chemical deposit of the lake being with the modern salt lake facies occurred in the inland clastic rock sediments.
出处
《华南地质与矿产》
CAS
2013年第3期227-233,共7页
Geology and Mineral Resources of South China
关键词
芒硝矿
地质特征
矿床成因
内蒙古达拉特旗
mirabilite ore
geological characteristics
ore genesis
Dalad county, Inner Mongonia
