Mine water geochemistry and metal flux in a major historic Pb-Zn-F orefield, the Yorkshire Pennines, UK
Mine water geochemistry and metal flux in a major historic Pb-Zn-F orefield, the Yorkshire Pennines, UK
复制标题
DOI：
10.1007/s11356-013-1513-4
复制
发表时间：
2013-11-01
影响因子：
5.8
通讯作者：
Mayes, W. M.
中科院分区：
文献类型：
--
作者：
Jones, A.;Rogerson, M.;Mayes, W. M.
最近的研究表明，英格兰和威尔士多达6%的河流受到废弃金属矿排放的影响。尽管影响程度很大，但在许多地区，矿井水影响评估仍受到数据可用性的限制。本研究概述了此类地区的水质、微量元素组成和通量;英国的约克郡奔宁矿田。穿过矿区的矿井排水沃茨以Ca-HCO 3-SO 4型沃茨为特征，具有中等矿化度（比电导：160-525 μ S cm ~（-1））和溶解态Zn的富集（千分之一货币符号2003 mug L-1），Ba（千分之一货币符号971 μ g L-1）、Pb（千分之一货币符号183 μ g L-1）和Cd（千分之一货币符号12 μ g L-1）。沃茨的主要离子组成反映了以石炭纪粗砂岩和石灰岩为主的围岩，后者在矿田部分地区严重岩溶化，而硫酸盐和微量元素富集是方铅矿、闪锌矿和重晶石矿化氧化的产物。排放点的污染物通量测量突出了整个区域的大排水水平的不成比例的重要性，通常排放到一阶源头流。天气金属负荷调查进行的Hebden贝克子流域的河流Wharfe突出的重要性，主要排水水平，以institutional基流污染，与扩散源可识别的废石扩张变得越来越突出，随着河流流量的增加。
Recent studies have shown up to 6 % of rivers in England and Wales to be impacted by discharges from abandoned metal mines. Despite the large extent of impacts, there are still many areas where mine water impact assessments are limited by data availability. This study provides an overview of water quality, trace element composition and flux arising from one such area; the Yorkshire Pennine Orefield in the UK. Mine drainage waters across the orefield are characterised by Ca-HCO3-SO4-type waters, with moderate mineralization (specific electrical conductance: 160-525 mu S cm(-1)) and enrichment of dissolved Zn (a parts per thousand currency sign2003 mu g L-1), Ba (a parts per thousand currency sign971 mu g L-1), Pb (a parts per thousand currency sign183 mu g L-1) and Cd (a parts per thousand currency sign12 mu g L-1). The major ion composition of the waters reflects the Carboniferous gritstone and limestone-dominated country rock, the latter of which is heavily karstified in parts of the orefield, while sulphate and trace element enrichment is a product of the oxidation of galena, sphalerite and barite mineralization. Contaminant flux measurements at discharge sites highlight the disproportionate importance of large drainage levels across the region, which generally discharge into first-order headwater streams. Synoptic metal loading surveys undertaken in the Hebden Beck sub-catchment of the river Wharfe highlight the importance of major drainage levels to instream baseflow contamination, with diffuse sources from identifiable expanses of waste rock becoming increasingly prominent as river flows increase.