- 责任者：Ma Xiangxian (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Zheng Guodong
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2011
- 卷期：30(6)
- 关键词：黄铁矿 ; pyrite ; 风化作用 ; weathering ; 地质灾害 ; geologic hazards ; engineering geological conditions
- 页码：p.1132-1138
- 图表：1 table, 47 refs.
- 分类号：1702
- 出版序号：20122698
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
///Pyrite is one kind of metal sulfide minerals distributed very widely and in non-uniform form in nature. Once the environmental conditions are changed, pyrite is very prone to be oxidized. Furthermore, human activities would accelerate oxidation of pyrite, reduce the strength of rocks, and trigger a lot of engineering geological problems. If the metal ions such as calcium are present in the geological environment, it is very easy for them to combine with sulfate and form gypsum. When the sulfur in pyrite generates the same moles of gypsum, the mineral volume would increase by more than 5 times in this process, and this would cause damage to the construction project due to non-uniform distribution. Despite the fact that the damage of pyrite weathering to projects has aroused some attention, further studies are needed to investigate and interpret geological problems caused by weathering of pyrite on the basis of geochemical theories. oft-com:office:office" />