岩石变形中的压溶作用及相伴的构造分异作用

PRESSURE SOLUTION AND ASSOCIATED TECTONIC DIFFERENTIATION IN ROCK DEFORMATION

压溶作用是低级变质环境中最常见的一种岩石变形作用机制。本文讨论了这种构造化学作用的渲化发展以及相伴的构造分异作用。探讨了诸如岩石的初始各向异性、应力状态、矿物的溶解度、流体的性质,以及物质扩散迁移的迁移系数、迁移通道等因素,对溶解作用带和沉淀作用带的生成与发展的影响,以及它们对在递进变形过程中由于分异作用形成的构造分异层的发展和几何特征的影响。

Pressure solution is one of the most common mechanism of rock de ormation in a lowgrade metamorphic environment. This paper discussed the development of this tectonic-chemical deformation process associated with tectonic differentiation. The effects of various factors, which influence the initiation and development of the zones of dissolution and deposition, have been discussed such as the initial heterogeneity of rocks, the state of stress, the solubility of minerals, the nature of fluid, and the transfer cofficients and the diffusion paths of mass transfer. The influences of these factors on the tectonic differentiation layers formed during progressive deformation process by chemical differentiation have also been discussed.