摘要
以甲基卡稀有金属矿区X03号超大型稀有金属矿体以及804号脉等两个典型隐伏矿体作为研究对象,采用硫酸钾(K_2SO_4)中性盐溶液作为金属活动态提取剂,进行了土壤中Li元素活动态的提取试验。结果表明,Li元素活动态的地球化学异常很好地对应了隐伏矿体的位置,能够有效地指示隐伏矿体的存在。在甲基卡土壤中目标元素内生组分/外生组分比值很高的稀有金属矿区,采用中性盐溶液这类弱提取剂,才能最大程度地排除土壤内生组分的干扰,有效识别隐伏矿体。通过提取条件优化实验,在甲基卡地区采用硫酸钾(K_2SO_4)溶液提取土壤中Li元素活动态的最佳技术参数为:提取剂浓度0.2 mol/L,粒级200目,pH为6.82,固液比为1:5,提取时间为48 h。
In the present study, potassium sulfate (K2SO4) solution was used to selectively extract the mobile forms of lithium (Li) element from two soil samples collected from Jiajika, a rare metal mining area (No.X03 super-large rare metal orebody and No. 804 vein). The results show that the geochemical anomaly of Li mobile form is well corresponded to the position of concealed orebody, which can effectively indicate the existence of a concealed orebody. For soils containing high content of endogenous component/exogenous component of target elements in Jiajika area, weak extracts such as neutral salt solution are the best choice to maximally eliminate the disturbance of endogenous components. The best extraction procedure of the mobile forms of Li element in the soil samples is as follows. 2g soil(200 mesh) is extracted by 10 mL 0.2mol/LK2SO4 solution (pH = 6.82) for 48 h.
作者
耿艳
梁斌
徐志强
王秋波
刘婷
户双节
GENG Yan;LIANG Bin;XU Zhiqiang;WANG Qiubo;LIU Ting;HU Shuangjie(School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China)
出处
《高校地质学报》
CAS
CSCD
北大核心
2019年第1期51-57,共7页
Geological Journal of China Universities
基金
国家重点研发计划(2017YFC0602702)
关键词
金属活动态
稀有金属矿
隐伏矿
甲基卡
mobile metals forms
rare metal mining area
concealed orebody
Jiajika area
