| 西藏巴达铜金矿床黄铁矿原位主微量元素特征及其环境效应 |
| |
| 引用本文： | 吴昊,祝向平,贾强,张彬,李勇,杨礼创.西藏巴达铜金矿床黄铁矿原位主微量元素特征及其环境效应[J].地质学报,2023,97(7):2261-2280. |
| |
| 作者姓名： | 吴昊 祝向平 贾强 张彬 李勇 杨礼创 |
| |
| 作者单位： | 1） 山东科技大学地球科学与工程学院，山东青岛，266590；2） 中国地质调查局成都地质调查中心，四川成都，610081;1） 山东科技大学地球科学与工程学院，山东青岛，266590；2） 中国地质调查局成都地质调查中心，四川成都，610081; 3） 成都理工大学地球科学学院，四川成都，610059 |
| |
| 基金项目： | 本文为中国地质调查局项目（编号 DD20221635）资助的成果 |
| |
| 摘 要： | 黄铁矿在自然环境中极易发生氧化，造成严重生态环境问题。为了研究自然条件下不同粒度和晶形黄铁矿化学成分的差异对黄铁矿氧化速率的影响，本文对巴达铜金矿床黄铁矿进行了LA- ICP- MS原位主微量元素分析和矿物面扫描分析。测试结果表明粗粒黄铁矿S、Fe含量较高，成分更纯；微量元素As、Co、Ni和Pb、Cu、Zn分别以类质同象方式和包裹体形式更多地存在于细粒黄铁矿中，二者均能促使细粒黄铁矿氧化速率加快；粗粒黄铁矿中Cr和Ti元素含量较高，其氧化后生成致密氧化膜可抑制黄铁矿被进一步氧化。本文认为对于本矿床中粗粒黄铁矿和细粒黄铁矿氧化污染问题应采用两种不同的治理措施，对于不易被氧化的粗粒黄铁矿，使其处于常温常压的干燥避光环境中即可防止发生氧化；对于易氧化的细粒黄铁矿，其氧化产物造成污染对环境压力较大，应采用源头治理和末端治理相结合的措施进行处理，以达到更科学的治理效果。
|
| 关 键 词： | 黄铁矿 LA- ICP- MS 微量元素 元素活动性 氧化速率 |
| 收稿时间： | 2022/7/3 0:00:00 |
| 修稿时间： | 2022/11/7 0:00:00 |
Characteristics and environmental effects of in situ major and trace elements in pyrite from the Bada copper- gold deposit in Tibet |
| |
| WU Hao,ZHU Xiangping,JIA Qiang,ZHANG Bin,LI Yong,YANG Lichuang.Characteristics and environmental effects of in situ major and trace elements in pyrite from the Bada copper- gold deposit in Tibet[J].Acta Geologica Sinica,2023,97(7):2261-2280. |
| |
| Authors: | WU Hao ZHU Xiangping JIA Qiang ZHANG Bin LI Yong YANG Lichuang |
| |
| Institution: | 1) School of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;2) Chengdu Geological Survey Center of China Geological Survey, Chengdu, Sichuan 610081, China;1) School of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;2) Chengdu Geological Survey Center of China Geological Survey, Chengdu, Sichuan 610081, China;3) Institute of Earth Sciences of Chengdu University of Technology, Chengdu, Sichuan 610059, China |
| |
| Abstract: | This study aims to investigate the effect of chemical composition of pyrite with different grain sizes and crystal forms on the oxidation rate of pyrite under natural conditions. In this paper, LA- ICP- MS in situ major and trace element analysis and mineral surface scanning analysis of pyrite in the Bada copper- gold deposit were carried out. The test results show that the coarse- grained pyrite has higher S and Fe content and purer composition, and the trace elements As, Co, Ni and Pb, Cu, and Zn exist preferentially in the fine- grained pyrite in the form of isomorphism and inclusions, respectively. In granular pyrite, both of them can accelerate the oxidation rate of fine- grained pyrite, the content of Cr and Ti in coarse- grained pyrite is higher, and a dense oxide film is formed after oxidation to inhibit further oxidation of pyrite. This paper proposes that different treatment measures should be adopted for the oxidation pollution of coarse- grained pyrite and fine- grained pyrite in most deposits. Coarse- grained pyrite is not easily oxidized, and it can be prevented from oxidation by keeping it in a dry and dark environment at normal temperature and pressure. Fine- grained pyrite is easily oxidized, and the pollution caused by the oxidation products has a great impact on the environment. It should be treated with a combination of source and end treatment for effectively preventing oxidation. |
| |
| Keywords: | pyrite LA- ICP- MS trace elements sequential extraction oxidation rate |
|
| 点击此处可从《地质学报》浏览原始摘要信息 |
| 点击此处可从《地质学报》下载免费的PDF全文 |
|
