Dissolved sulfate d 34 S and the origin of sulfate in coal mine waters; NE England
Dissolved sulfate d 34 S and the origin of sulfate in coal mine waters; NE England
复制标题
煤矿水中溶解硫酸盐d 34 S及硫酸盐来源；
DOI：
10.1144/qjegh2022-106
复制
发表时间：
2023
影响因子：
1.4
通讯作者：
Banks D
中科院分区：
文献类型：
--
作者：
Banks D
在英格兰东米德兰兹郡、南约克郡和泰恩赛德地区进行的一项侦察研究中，对煤矿水进行了采样。几乎所有的矿井水都有相似的18O和2H浓度，表明来自全新世的补给(平均分别为−7.9和−54‰，不包括两个异常值)。大多数浅层重力排水产生的矿井水溶解了~lt；+10‰的34S硫酸盐，这表明硫酸盐是由黄铁矿氧化而来的。从钻孔或竖井抽出的更深的矿井水往往更咸，溶解的硫酸盐含量为>；+14‰，在两个案例中为>；+30‰。后一类水域中的硫酸盐不能很容易地解释为来自黄铁矿氧化。另一种假说(蒸发卤水或海洋卤水、蒸发岩溶解或部分封闭系统微生物硫酸盐还原)可以作为解释。一种更一般的假说认为，深层地下水/矿井水可以被视为咸水池，其硫酸盐34S的浓度受各种来源的硫酸盐活化速率和通过沉淀或微生物还原去除硫酸盐之间的动态平衡控制。补充材料：补充材料A(详细描述样本地点和结果)和补充材料B(样本地点的位置)可从https://doi.org/10.6084/m9.figshare.c.6418981获得
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 similar18O and2H concentrations, indicating a derivation from Holocene recharge (average of −7.9 and −54‰, respectively, excluding two outliers). Most mine waters emerging by shallow gravity drainage have dissolved sulfate34S levels of <+10‰, suggesting a derivation of sulfate from the oxidation of pyrite. Deeper mine waters, pumped from boreholes or shafts, tended to be more saline with dissolved sulfate34S levels of >+14‰ and, in two cases, >+30‰. The sulfate in these latter waters cannot be readily explained as deriving from pyrite oxidation. Alternative hypotheses (evaporitic or marine brines, evaporite dissolution or partially-closed-system microbial sulfate reduction) can be invoked as explanations. A more general hypothesis proposes that deep groundwaters/mine waters can be regarded as saline ‘sinks’, whose sulfate34S concentration is controlled by a dynamic equilibrium between rates of sulfate mobilization from various sources and sulfate removal by precipitation or microbial reduction.Supplementary material: Supplementary Material A (a detailed description of sample sites and results) and Supplementary Material B (locations of sample sites) are available at https://doi.org/10.6084/m9.figshare.c.6418981