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本文提出了构造成矿作用动力学研究的递增应力流变学方法。利用该方法将构造变形、应力、流体流动、地球化学反应及成岩成矿作用等多过程耦合起来,可以从多种地质过程的耦合与反馈作用对构造成矿的动力学演化过程进行1~3维数值模拟。模拟的主要内容是在各种过程耦合作用下,以下描述构造成矿体系的主要变量的时空演化:(1)与成矿流体的形成和性质有关的变量,如地层中矿物(包括成矿物质)的溶解速率、流体中各组分的浓度与饱和度、流体温度、压力、离子强度等;(2)与构造变形和流体运移有关的各变量,如应力与变形速率、岩石孔隙度、构造(断裂)渗透率等;(3)与沉淀成矿有关的变量,如矿物(金瞩矿物和脉石矿物)的成核速率、各矿物的沉淀量等;(4)上述各有关变量间的时空耦合关系,如断裂渗透率时空演化与流体流动、汇聚和成矿的耦合关系等。
This paper presents an incremental stress-rheological method to study the kinetics of mineralization. Using this method to couple multiple processes such as tectonic deformation, stress, fluid flow, geochemical reactions and diagenesis and mineralization, the dynamic evolution of mineralized formations can be characterized by coupling and feedback of various geological processes. Dimension value simulation. The main contents of the simulation are as follows: Under the coupling of various processes, the following describes the temporal and spatial evolution of the major variables that constitute the ore system: (1) variables related to the formation and properties of ore-forming fluids such as minerals in the strata (including metallogenic materials ), The concentration and saturation of each component in the fluid, fluid temperature, pressure, ionic strength, etc .; (2) variables related to tectonic deformation and fluid migration such as stress and deformation rate, rock porosity, (3) sedimentary mineralization-related variables such as the nucleation rate of minerals (gold-bearing minerals and gangue minerals), the amount of sedimentation of each mineral, etc .; (4) the above-mentioned relevant variables Such as the temporal and spatial evolution of fracture permeability and the fluid flow, the coupling relationship between convergence and mineralization, and so on.