本文選題：稀土元素 + 地球化學(xué)��； 參考：《中國稀土學(xué)報》2017年02期

【摘要】：為了解煤礦區(qū)地下水稀土元素地球化學(xué)特征,采集了許疃煤礦3個含水層水樣,進(jìn)行常規(guī)離子和稀土元素測試,探討了稀土組成及元素異常特征,結(jié)果表明:許疃礦3個含水層呈堿性,pH值平均為8.7,地下水中陰離子以HCO_3~-為主,陽離子以K~++Na~+為主。Ca~(2+)和Mg~(2+)含量在灰?guī)r水中最大,Na~++K~+濃度在煤系水中最高。地下水中稀土總量偏低(∑REE=0.023~0.251μg·L~(-1)),經(jīng)后太古宙平均頁巖標(biāo)準(zhǔn)化,表現(xiàn)為輕稀土虧損,重稀土富集,所有樣品均表現(xiàn)為明顯的Eu正異常,多數(shù)樣品表現(xiàn)為Ce和Y負(fù)異常;這些特征受到多種因素控制,其中Ce負(fù)異常受到地下水pH值影響,而Eu異常受長石類礦物溶解的影響,Y負(fù)異常和較低的Y/Ho值與Ca~(2+)濃度密切相關(guān),受到圍巖作用的影響。這些特征及影響因素表明利用稀土元素特征進(jìn)行礦井水源識別具有一定的可行性。
[Abstract]:In order to understand the geochemical characteristics of rare earth elements in underground water in coal mining area, three aquifer water samples of Xutuan coal mine were collected, the conventional ions and rare earth elements were tested, and the composition and anomalous characteristics of rare earth elements were discussed. The results show that the average pH value of the three aquifers in Xutuan Mine is 8.7. The main anions in the groundwater are HCO _ 3N ~ -, and the cations are K ~ (Na ~ (~ +). CaDU ~ (2) and Mg~(2). The maximum concentration of Na ~ K ~ (~ +) in limestone water is the highest in coal measure water. The total amount of rare earth elements in groundwater is low (鈭，

本文編號：1939556