THE KEY PROBLEM AND RESEARCHING METHODS OF THE TRANSPORTATION AND LOCATING PROCESSES OF METALLOGENIC FLUID
DENG Jun~(1), WANG Qing-fei~(1), HUANG Ding-hua~(2) (1.Key Laboratory of LithosphericTectonics and Exploration Ministry of Education,China University of Geosciences, Beijing 100083,China; 2 China University of Geosciences, Wuhan 430074,China)
The major focusesin the domain of structure-fluid-metallogenism system include the origin of metallogenic marerials, the chemical mechanism of activation, transportationand precipitation of metallogenic elementsand the physicprocess of geofluid’s transportation and locating. Comparing with the other two focuses, the process physicof the geofluid's movement bears more difficulty and questions for the researchers. The current methods for the study of physicprocess of the geofluid's movementmainly consist of qualitative analysis, numerical simulation and analogue experiment. Based on the generalizationand reasoning of basic geological phenomena, qualitative analysisindicate that the key problem of geofluid's transportation process is the physic mechanismof transportation process of polyphase fluid in the 3D dynamical structuralframe. Yet this key problem goes beyond the extent of the research abilityof the qualitative analysismethod. Because the numerical simulation method neglects the dynamical change of penetrabilityand stress field during metallogenic process, it is devoid of the similitudeto the reality and failed to deal with the problem too. Althoughthe analogue experiment can simulate the transportation process of polyphase fluid in the 2D dynamical structuralframe, it can't carry out the 3D experiment because of the limitation of the experimental conditions. But in virtue of the mutual complementaryadvantages of the three methods, the colligated application of those methods can discover the physicmechanism of transportation process of polyphase fluid in the 3D dynamical structuralframe.