Mineralogical controls on storage of As, Cu, Pb and Zn at the abandoned Mathiatis massive sulphide mine, Cyprus
Mineralogical controls on storage of As, Cu, Pb and Zn at the abandoned Mathiatis massive sulphide mine, Cyprus
复制标题
对塞浦路斯废弃马蒂蒂斯块状硫化物矿中砷、铜、铅和锌储存的矿物学控制
作者：
K. Hudson;S. Edwards
塞浦路斯Mathiatis块状硫化物存款是一个低品位（0.3%铜），300万吨的黄铁矿和少量黄铜矿矿体产于特罗多斯蛇绿岩的玄武质熔岩。1987年停止采矿后，留下了一个深露天坑，周围是大量的废石，这些废石正在氧化和浸出。本研究的目的是确定矿物学控制的存储和潜在的再活化的As，Cu，Pb和Zn内，并从，矿山废石堆。收集的大部分弃土样品及相关资料（水系沉积物、块状黄铁矿巨砾与钙质硅质岩之间的反应带、河床上的盐壳）富集As（27-220 ppm），铜（110-400 ppm），铅相对于玄武岩和钙质燧石（As 4-10 ppm，Cu 20-76 ppm，Pb 3-6 ppm，Zn 39-200 ppm）而言，锌（290 - 12，000 ppm）含量较高。弃渣和相关材料中的砷、Cu、Pb和Zn与Fe（-Al-S）-O、Fe（-Al-Mg）-S-O、Al（-Mg-Fe）-S-O和Mg（-Al-Fe）-S-O相（括号表示小于20 wt.%的微量组分在各阶段）。使用氯化钙的化学提取工作表明，铜，锌，并在一定程度上，作为，可能比铅更可溶。次生盐壳和反应区物质中铜和锌的总浓度非常高，盐壳中CaCl 2可提取的砷、铜和锌含量高，以及为欧盟LIFE报告收集的Mathiatis矿区的水数据，都证实了这一点。这可能对Mathiatis地区以及世界各地类似矿物和气候地区的生态系统健康和水质产生影响。
Abstract The Mathiatis massive sulphide deposit in Cyprus was a low-grade (0.3% Cu), three million ton ore body of pyrite and minor chalcopyrite occurring within basaltic lavas of the Troodos ophiolite. Cessation of mining in 1987 left a deep open pit surrounded by large heaps of spoil, which are undergoing oxidation and leaching. The aim of this study was to determine the mineralogical controls on the storage and potential remobilization of As, Cu, Pb and Zn within, and from, mine spoil heaps. Most of the spoil samples collected, and related materials (stream sediment, reaction zone between a boulder of massive pyrite and calcareous chert, salt crusts on stream beds), are enriched in As (27-220 ppm), Cu (110-400 ppm), Pb (10-140 ppm) and Zn (290 - 12,000 ppm) relative to both the basalt and calcareous chert (As 4-10 ppm, Cu 20-76 ppm, Pb 3-6 ppm, Zn 39-200 ppm). Arsenic, Cu, Pb and Zn in the spoil and related materials are associated with Fe(-Al-S)-O, Fe(-Al-Mg)-S-O, Al(-Mg-Fe)-S-O and Mg(-Al-Fe)-S-O phases (the brackets represent minor components of less than 20 wt.% within the phases). Chemical extraction work using CaCl2 suggests that Cu, Zn and to some extent, As, are potentially more soluble than Pb. This is corroborated by the very high total concentrations of Cu and Zn in both the secondary salt crusts and the reaction zone material, high CaCl2-extractable As, Cu and Zn in the salt crusts, and aqueous data for the Mathiatis mine area collected for a European Union LIFE report. This may have implications for ecosystem health and water quality in the Mathiatis area and areas of similar mineralogy and climate world wide.