岩石矿物学杂志2011，Vol.30Issue(6)：1132-1138,7.
黄铁矿风化作用及其工程地质意义
Weathering of pyrite and its engineering geological significance
摘要
Abstract
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. Pyrite oxidation and decomposition form water-soluble minerals such as jarosite with the continuous reaction. These weathering minerals are dissolved and often form small cavities, resulting in the formation and transformation of the underground fluid and increasing damages to projects. 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.关键词
黄铁矿/风化作用/工程地质/防治/评述Key words
pyrite/ weathering/ engineering geology/ prevention/ review分类
天文与地球科学引用本文复制引用
马向贤,郑国东,梁收运,魏丽娟,梁明亮..黄铁矿风化作用及其工程地质意义[J].岩石矿物学杂志,2011,30(6):1132-1138,7.基金项目
中国科学院"百人计划"(2007年度择优支持)(2006060) （2007年度择优支持）
