Effects of Geo-stress on Carbonate Dissolution and Karst Evolution
Qian Haitao
Sun Qiang
Wang Sijing
Abstract：It is worthy of attention yet has been neglected for long time to explore effects of geo-stress on carbonate dissolution and karst evolution.A comprehensive analysis about the effects of geo-stress is carried out based on theories of geochemistry, mineralogy,petrology,geo-thermodynamics,and plastoelasticity in this study.The results reveal that the involvement of stress can change the dissolution rate of carbonate rocks by raising the strain energy and free energy of dissolution and changing the fracture characteristics and groundwater movement in carbonate rock,which leads to an increase of saturated concentration dissolved carbonate matters on the water-rock interface and changes of the depth and flow pattern of water and concentration of dissolved carbonate matters in water in carbonate rock fractures,and which can change the active area of interaction between carbonate rock and water in turn.Moreover,there exists a coupling and competitive mechanism because of stress-dissolution in carbonic rocks,which leads to behaviors of chaos and self-organization in the karst evolution.And so the effect of stress should not be ignored due to the fact that a minor change in the beginning aroused by stress can lead to great change in the evolution progress of karst,and the natural phenomenon of coexistence between dissolution and precipitation,moniliform distributed karst caves and isolated karst caves may be the results of the self-organization because of coupling and competitive behaviors aroused by stress-dissolution.
Keywords：carbonate rockdissolution ratecoupling of stress and dissolutioncompetitive mechanism
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 896-904 )