非静水应力作用固体的化学位及其构造地球化学意义

非静水应力作用的含水岩石中的力学 -化学相互作用是构造地球化学研究的主要对象之一 ,非静水应力作用固体物质的化学位则是了解这种作用的关键。本文在总结前人有关成果的基础上 ,从理论上了提出了非静水应力作用固体岩石中固 -液界面上的固体物质的化学位的一般形式。在此基础上 ,根据 Onsager扩散方程和局部平衡假设 ,推导了固体物质在颗粒间流体中溶解浓度随固体岩石中应力场和应变能的时空变化关系的动力学方程。以此论证了在温度较低时 ,固体物质在颗粒间流体中的溶解的浓度的时间变化是受固体岩石中应力梯度和应变能梯度控制的

CHEMICAL POTENTIAL OF NONHYDROSTATICALLY STRESSED SOLIDS AND ITS IMPLICATION IN TECTONO-GEOCHEMISTRY

The mechanical chemical interactions in nonhydrostatically stressed water bearing rocks are one of the main researching targets. The chemical potential of nonhydrostatically stressed solids is a key to understand the mechanical chemical interaction processes. Based on summary of existing related accomplishments, a general equation for chemical potential of solid materials on the solid water interfaces in the nonhydrostatically stressed rocks is proposed theoretically. Furthermore, according to the Onsager diffusion equation and hypothesis of local equilibrium, the kinetic equation for the spatial temporal relation of concentration of solid materials dissolved in intergrainular waters to stress field and strain energy in solid rocks is deduced. According to the kinetic equation, it is concluded the temporal variation of concentration of solid materials dissolved in intergrainular waters is controlled by the stress gradient and strain energy gradient in solid rocks when the temperature of the system is low.