岩石中氟的赋存状态研究

使用逐级化学提取方法对岩石中氟的赋存状态进行了研究.结果表明:岩石中氟主要与K和Al呈显著相关,高氟岩石中氟与P呈显著正相关,氟主要以氟磷灰石的形式存在;经逐级提取后残渣中的氟与Ca呈显著负相关关系,碳酸盐岩和磷块岩中的氟主要以水溶态和碳酸盐结合态等易溶形式存在;而硅质岩、黑色页岩、硅质碳板岩和碳质板岩中的氟主要存在于难溶矿物中.

STUDIES ON MODE OF OCCURRENCE OF FLUORINE IN ROCKS

Sequential extraction experiments were used to determine the mode of occurrence of fluorine in rocks in this paper.The results show that F correlates positively with K and Al in rocks,and there is also significant positive correlation between F and P in rocks with high F content,in which F is likely to occur as fluorapatite.Negative correlation is found between F and Ca in leached residues.Our data suggest that F occurs as water-soluble compounds and carbonates-associated in carbonate rocks and phosphorite rocks.However,in siliceous rocks,black shale and carbonaceous slate,F mainly occurs in stable compounds which are not dissolved in our solvents.