低温非静水应力作用下固体岩石颗粒间流体的性状及传质作用

doi:10.11867/j.issn.1001-8166.2000.04.0395

地球科学进展 ›› 2000, Vol. 15 ›› Issue (4): 395 -399. doi: 10.11867/j.issn.1001-8166.2000.04.0395

刘亮明 ^①②,彭省临 ^②

①中国科学院地球化学研究所,贵州贵阳 550002;②中南工业大学地质系,湖南长沙 410083

收稿日期:1999-09-06 修回日期:2000-01-02 出版日期:2000-08-01
通讯作者: 刘亮明(1964-),男,副教授,博士后,主要从事矿床学和构造地质学的教学和科研工作。
基金资助:
国家教育部博士点学科基金项目“逆冲构造中力学—化学耦合作用与硫化物的改造成矿”(编号:98053302)资助。

NATURE AND STATE OF INTERGRAIN FLUID IN NONHYDR-OSTATICALLY SRESSED SOLID ROCKS UNDER LOW TEMPERATURE AND ITS ROLE FOR MASS TRANSFER

LIU Liang-ming ^①②,PENG Sheng-lin ^②

①Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China；②Department of Geology,Central South University of Technology,Changsha 410083,China

Received:1999-09-06 Revised:2000-01-02 Online:2000-08-01 Published:2000-08-01

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低温下非静水应力作用固体颗粒间流体因其参与流体—矿物反应和流体传质而在地壳岩石变形和同构造地球化学过程中起着重要作用。粒间流体的性状、粒间流体—矿物反应和粒间流体传质都与固体颗粒所受应力密切相关。流体膜是非静水应力作用下固体颗粒间流体存在的主要形式,流体膜的厚度和成分决定着究竟是流体膜中水化力、双电层排斥力,还是因双电层而引起的流体渗透压在流体膜传递应力的机制中起主导作用。应力通过改变固—液界面上固体物质的自由能而影响固—液界面反应和流体的传质,并对这一应力感生过程的热力学和动力学方程进行了推演。

关键词: 固体自由能, 流体—矿物反应, 流体传质, 非静水应力, 粒间流体

Intergrain fluids within the nonhydrostatically stressed solids under low temperature play a very important role in deformation and syntectonic geochemical processes for the intergrain fluid-mineral reactions and the mass-transfer by intergrain fluids. The state and nature of inter-grain fluids, the reactions of inter-grain fluids with minerals, and the mass transfer by intergrain fluids are all closely related to stress of solid grains. Through theoretical analysis, the water film is thought of being the main state of intergrain fluids in the nonhydrostatically stressed solids. Whether hydration force, double-layer repulsive force or osmotic pressure due to double-layer is the main mechanism for transmitting stress mainly depends on thickness and composition of the fluid film. The contribution of stress to solid-fluid interface reaction
and mass transfer by fluids is that stress can enhance the free energy of solid matter on the interfaces. The thermodynamic and kinetic equations for the stress induced processes are deduced in this paper.

Key words: Nonhydrostatically stress, Intergrain fluids, Free energy of solid, Fluid-mineral reaction, Mass transfer by fluid.

中图分类号:

P594

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