Acidification Characteristics and Mechanism of Carbonate-Type Tailings of Bali Tailings Storage, the Dachang Tin-Polymetallic Orefield, Guangxi
详细信息
- 责任者：Lei Liangqi (School of Earth Science ; Guilin University of Technology ; Guilin 541004 ; China) ; Song Ci’an
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2011
- 卷期：30(1)
- 关键词：碳酸盐矿物 ; carbonates ; 尾矿 ; tailings ; 广西 ; Guangxi Province
- 页码：p.141-149
- 图表：4 illus., 3 tables, 25 refs.
- 分类号：1800
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
This paper deals with a weathering profile of carbonate-type tailings (sulfide-bearing carbonate-rich tailings) in Bali tailings storage of the Dahang tin-polymetallic orefield in Guangxi. The storage was closed about 20 years ago. Based on studying the profile using composite geological-geochemical methods such as investigation of fabrics and contents, XRD analysis, Sobek-ABA and NAG test, the authors have reached the some conclusions. The phenomena might be attributed to the following reasons: the armor formed by secondary minerals such as lepidocrocite and gypsum during the acidification of tailings caused the development of the rest of carbonate particles and then blocked the neutral reaction of carbonate in tailings. Therefore, it is inferred that the metal-sulfide tailings, even if containing excessive carbonate (base materials), still possess a potential of acidifying and generating acid mine drainage.
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