Pressure solution and Coble creep in rocks and minerals: a review
Pressure solution and Coble creep in rocks and minerals: a review
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DOI：
10.1144/gsjgs.134.1.0057
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发表时间：
1977-10
影响因子：
2.7
通讯作者：
K. McClay
中科院分区：
文献类型：
--
作者：
K. McClay
对压力解决方案的研究进行了简要回顾。讨论了压溶和Coble 蠕变的机理。扩散传质过程的变形通常伴随着晶界滑动，这将对变形过程中产生的织构和微观结构产生重要影响。使用松弛测试的实验似乎有希望获得观察压溶现象所需的慢应变速率。讨论了非静水应力固体的热力学，并对岩石中可能的扩散路径进行了分析。对压溶和 Coble 蠕变的理论速率方程的评估表明，细粒石英和方解石岩石中的压溶可能会在 200–350°C 的温度下产生地质应变速率。预计Coble蠕变会在低温下引起细粒方铅矿的地质应变率，并且在350°C左右的温度下也会引起细粒方解石岩石的地质应变率。天然岩石压力溶液系统的化学预计会产生重大影响，需要进一步详细研究。需要进一步的研究来阐明扩散传质过程中晶界的性质和作用。压溶现象对于一些石油储层岩石的压实行为很重要，也许在一些由压溶调节滑动的断层中也很重要。
A brief review of research on pressure solution is given. The mechanisms of pressure solution and Coble creep are discussed. Deformation by diffusive mass transfer processes is generally accompanied by grain boundary sliding and this will have important effects on the textures and microstructures produced during deformation. Experiments using relaxation testing seem promising in allowing access to the slow strain rates necessary to observe pressure solution phenomena. The thermodynamics of non-hydrostatically stressed solids is discussed and an analysis of possible diffusion paths in rocks is presented. Evaluation of theoretical rate equations for pressure solution and Coble creep indicates that pressure solution in fine-grained quartz and calcite rocks may give rise to geological strain rates at temperatures from 200–350°C. Coble creep is expected to give rise to geological strain rates in fine-grained galena at low temperatures and also in fine-grained calcite rocks at temperatures around 350°C. The chemistry of natural rock pressure solution systems is expected to have significant effects and needs further detailed study. Further research is needed to elucidate the nature and role of grain boundaries during diffusive mass transfer. Pressure solution phenomena are important in the compaction behaviour of some petroleum reservoir rocks and perhaps in some faults where sliding is accommodated by pressure solution.