采煤驱动下峰峰矿区奥灰水中氢氧同位素漂移特征研究*
投稿时间:2018-03-12  修订日期:2019-01-14  点此下载全文
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作者单位E-mail
孙伟 中国地质环境监测院  
郝春明 华北科技学院 环境工程学院 94436240@qq.com 
黄越 华北科技学院 环境工程学院  
何培雍 中国地质环境监测院  
中文摘要:为了综合评估采煤驱动下奥灰水中氢氧同位素的漂移特征,本文分别采集了峰峰矿区不同径流区的奥灰水样品27件,通过分析氢氧同位素D和18O的漂移特征和水-岩作用,阐明了其漂移过程。研究结果表明:煤矿开采后,南部径流区,奥灰水中的氢氧同位素组成呈背景特征,未发生漂移现象。东部径流区,同位素D漂移现象显著,漂移率为57.14%,部分样品D和18O双项漂移。北部径流区,同位素D和18O双项漂移明显,漂移率为27.27%。同位素D漂移与奥灰水和硅酸盐矿物的水岩反应有关,水-岩相互作用中伴随有同位素D的交换平衡反应。同位素18O漂移与奥灰水和碳酸盐矿物的水岩反应有关,水-岩反应伴随有同位素18O的交换平衡反应。D和18O的双项漂移现象的发生则是奥灰水与碳酸盐和硅酸盐水-岩反应共同作用的结果。
中文关键词:漂移特征  氢氧同位素  水-岩作用  奥灰水  采煤
 
Drift characteristics of Hydrogen and Oxygen Isotopes in Ordovician Karst Groundwater under mining Activities
Abstract:In order to comprehensively evaluate the drift characteristics of hydrogen and oxygen isotopes in the Ordovician karst groundwater under coal mining, we collected 27 samples from different runoff areas in Fengfeng Mine area, analyzed the drift characteristics of D and 18O isotopes and clarified its drift process. The results showed that in the south runoff areas, the composition of hydrogen and oxygen isotopes were no drift with background feature after strongly coal mining; in the eastern runoff area, the isotope D drift was remarkable, the drift rate was 57.14%, simultaneously some samples D and 18O driftd together. In the north runoff area, the isotope D and 18O drift were obvious, the drift rate was 27.27%. The isotope D drift was related to the water-rock reaction between Ordovician and silicate minerals, accompanied with the D drift equilibrium reaction. The isotope 18O drift was related to the water-rock reaction between Ordovician and carbonate minerals, accompanied with the 18O drift equilibrium reaction. The isotope D and 18O drift were related to the water-rock reaction between Ordovician and carbonate and silicate water-rock reactions.
keywords:Drift characteristic  hydrogen oxygen isotopes  rock-water interaction  Ordovician Karst Groundwater  Coal Mining
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