The São Domingos area (Corte do Pinto, Portugal) represents a large sulfide ore deposit in the Iberian Pyrite Belt that was mined primarily for copper and sulfur in the past. Currently, the deserted mine and mine wastes are the reason for the production of acid mining drainage releasing potentially harmful elements. Because metastable secondary sulfates may temporary sink toxic pollutants, the in situ monitoring of their distribution is required. In this work, we tested a handheld Raman spectrometer equipped with a 532 nm laser excitation for this task. Twelve selected samples of complex composition were analyzed directly in the field using the handheld Raman spectrometer. For comparison, the collected samples were additionally analyzed through laboratory‐based Raman spectroscopy and X‐ray diffraction. Based on the in situ measurements, rozenite, melanterite, coquimbite, jarosite, metavoltine, chalcanthite, bonattite, antlerite, halotrichite‐group minerals, gypsum, and sulfur were detected. The results show that handheld Raman spectrometer is comparable with other laboratory techniques and such handheld systems can be deployed successfully for monitoring of sulfate distribution directly on site.

中文翻译：

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手持拉曼光谱仪在废弃矿区中筛选有色二次硫酸盐的应用—圣多明哥矿（伊比利亚黄铁矿带）

SãoDomingos地区（葡萄牙Corte do Pinto）代表着伊比利亚硫铁矿带中的大型硫化物矿床，过去主要开采铜和硫。当前，荒芜的矿山和矿山废料是产生酸性矿井排水而释放出潜在有害元素的原因。由于亚稳态仲硫酸盐可能会暂时吸收有毒污染物，因此需要对其分布进行现场监测。在这项工作中，我们测试了配备有532 nm激光激发的手持式拉曼光谱仪。使用手持式拉曼光谱仪在现场直接分析了十二种复杂成分的样品。为了进行比较，还通过基于实验室的拉曼光谱和X射线衍射对收集的样品进行了分析。根据原位测量，菱锰矿，可以检测到黑铁矿，白云石，黄钾铁矾，次金属，黄铜矿，钙铝榴石，钙铁矿，卤钨矿类矿物，石膏和硫。结果表明，手持式拉曼光谱仪可与其他实验室技术相媲美，这种手持式系统可以成功部署，直接在现场监测硫酸盐的分布。