皖北卧龙湖煤矿多含水层地下水稀土元素特征及其意义  

Rare Earth Element Characteristics and Its Significance of Multiple Aquifers Groundwater from Wolonghu Coal Mine,Northern Anhui Province

作　　者：陈松[1,2] 桂和荣[1] 孙林华[1] 林曼利[1] 

机构地区：[1]宿州学院地球科学与工程学院,安徽宿州234000 [2]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《稀土》2014年第3期94-100,共7页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(41173106);安徽省高校省级自然科学项目资助(KJ2013A249;KJ2013B289;KJ2013B291);宿州学院创新团队项目资助(2013kjtd01);宿州学院科研平台开放课题(2013YKF01)

摘　　要：采集了卧龙湖煤矿松散层水、砂岩水和灰岩水样品进行稀土元素测试分析,结果表明,卧龙湖矿区三个含水层均呈现偏碱性水质,稀土总量偏低(∑REE=0.046μg/L^0.15μg/L),经后太古代平均页岩标准化后,均表现为轻稀土亏损,重稀土富集,所有样品均表现为明显的Eu正异常(δEu=1.12~11.36),多数样品表现为Ce负异常,灰岩水表现明显的Y正异常;这些特征受到多种因素控制,其中Ce负异常主要受到地下水氧化还原环境的影响,而Eu异常除受到了测试条件影响外,长石的溶解、氧化还原条件及灰岩水中过高的Sr都有一定的影响,Y异常和灰岩水中较高的Y/Ho值分别受到Sr含量和Ca的影响。这些特征及影响因素均表明利用稀土元素特征进行矿井水源识别具有一定的可行性。The analysis of rare earth element（ REE） compositions of the water samples from loose aquifer,sandstone aquifer and limestone aquifer in Wolonghu mining area,northern Anhui province had been obtained. The results showed that these water samples from three aquifers in Wolonghu mining area were alkaline in nature,and the three aquifers are low in ∑REE（ 0. 046 - 0. 15μg /L） and characterized by depletion of LREEs and enriched in HREEs with PAAS normalization,positive Eu anomalies with δEu = 1. 12 - 11. 36,and an universal Ce depletion. The positive Y anomalies were found in limestone aquifer. All these features were controlled by many different factors,i. e.,Ce depletion were mainly caused by the environment of redox; positive Eu anomalies were influenced by not only test conditions,the dissolution of feldspar,and redox conditions,but also high concentrations of Sr in limestone aquifer. The positive Y anomalies and high values of Y /Ho in limestone aquifer were affected by the concentration of Sr and Ca,respectively. All the characteristics of REE in deep groundwater and their influence factors revealed that using rare earth element to discriminate the water source in coal mines is feasible.

关 键 词：稀土元素 含水层 卧龙湖煤矿 皖北 突水 

分 类 号：P641.3[天文地球—地质矿产勘探]