溶解硫酸盐δ34S和煤矿水中硫酸盐的来源;英格兰东北部

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-02-10 DOI:10.1144/qjegh2022-106
D. Banks, A. Boyce
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引用次数: 1

摘要

在英格兰东米德兰、南约克郡和泰恩赛德地区进行的一项调查研究中,对煤矿水进行了采样。几乎所有矿井水都具有相似的δ18O和δ2H,表明其来源于全新世补给(平均值分别为-7.9‰和-54‰,不包括两个异常值)。浅层重力排水产生的大多数矿井水的溶解硫酸盐δ34S小于+10‰,表明硫酸盐来源于黄铁矿的氧化。从钻孔或竖井抽取的更深的矿井水往往含有更多的盐水,溶解硫酸盐δ34S为>+14‰,在两种情况下为>+30‰。后一种水中的硫酸盐不能很容易地解释为源自黄铁矿氧化。可以援引其他假设(蒸发盐或海水盐水、蒸发盐溶解、封闭系统微生物硫酸盐还原)作为解释。一个更普遍的假设提出,深层地下水/矿井水可以被视为盐水“汇”,其硫酸盐δ34S由各种来源的硫酸盐动员速率和通过沉淀或微生物还原去除硫酸盐的速率之间的动态平衡控制。补充材料:https://doi.org/10.6084/m9.figshare.c.6418981
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Dissolved sulphate δ 34 S and the origin of sulphate in coal mine waters; NE England
Coal mine waters have been sampled during a reconnaissance study in the East Midlands, South Yorkshire and Tyneside areas of England. Almost all the mine waters had similar δ 18 O and δ 2 H indicating a derivation from Holocene recharge (average -7.9‰ and -54‰, respectively, excluding two outliers). Most mine waters emerging by shallow gravity drainage have dissolved sulphate δ 34 S of < +10‰, suggesting a derivation of sulphate from oxidation of pyrite. Deeper mine waters, pumped from boreholes or shafts tended to be more saline with a dissolved sulphate δ 34 S of >+14‰ and, in two cases, >+30‰. The sulphate in these latter waters cannot be readily explained as deriving from pyrite oxidation. Alternative hypotheses (evaporitic or marine brines, evaporite dissolution, closed-system microbial sulphate reduction) can be invoked as explanations. A more general hypothesis proposes that deep groundwaters / mine waters can be regarded as saline “sinks”, whose sulphate δ 34 S is controlled by a dynamic equilibrium between rates of sulphate mobilisation from various sources and sulphate removal by precipitation or microbial reduction. Supplementary material: https://doi.org/10.6084/m9.figshare.c.6418981
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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