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投稿时间:2019-07-08 修订日期:2019-07-12
投稿时间:2019-07-08 修订日期:2019-07-12
中文摘要: 锡铁山铅锌矿床是柴北缘铅锌成矿带最典型的大型铅锌矿床之一,位于青藏高原东北部。锡铁山已有多年的开发历史,矿业活动所产生的固废物会携带高浓度的污染元素,而尾矿库是污染元素的重要聚集场所。通过野外调查,样品采集、测试分析等,分析尾矿库矿物组合及铅锌元素赋存状态,旨在揭示高原地表环境下铅锌重金属迁移、赋存形态及累积过程,阐明重金属铅锌元素迁移机制。通过在沉积物中剖面分层采样,对样品矿物组合及铅锌含量进行分析,总结铅锌含量分布变化规律,研究结果表明,尾矿中矿石矿物主要为闪锌矿、方铅矿及黄铁矿,脉石矿物主要有石英、方解石、角闪石及透辉石。尾矿库中重金属铅锌含量均高于背景值,铅元素迁移能力中等,锌元素迁移能力相对较强,该研究认识有利于绿色矿山建设,有利于生态效应理论积累新知识。
Abstract:Xitieshan lead-zinc deposit is one of the most typical large lead-zinc deposit in the lead-zinc metallogenic belt in the northern margin of Qaidam Basin, it is located in the northeast of Tibetan Plateau. It has been developed for many years, the solid waste produced by mining activities can carry high concentration of polluted elements, and tailings reservoir is an important gathering place of contaminated elements. In order to reveal the migration, occurrence form and accumulation process of lead and zinc in surface environment of plateau, and to clarify the migration mechanism of lead and zinc elements, the mineral assemblage and the occurrence state of lead and zinc elements in tailings reservoir are analyzed by means of field investigation, samples collection, test and analysis. Stratified sampling in sediment profile, lead and zinc content, mineral content of samples are analyzed, and the distribution and variation of lead and zinc content are summarized. The results show that the ore minerals in tailings are mainly sphalerite, galena and pyrite, gangue minerals are mainly quartz, calcite, hornblende and diopside. The content of lead and zinc in tailings reservoir is higher than the background value, the migration of lead element is strong, and the migration ability of zinc element is medium. This research cognition is beneficial to the construction of green mine, to the accumulation of new knowledge about ecological theory.
文章编号:20190708002 中图分类号:TD166 文献标志码:
基金项目:青海省应用基础研究计划项目(No.2019-ZJ-7022); 青海省自然科学(No.2017-ZJ-955Q)
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