成矿流体渗透过程的分形模拟

Fractal simulation of osmotic process of ore-forming fluids

随着地质研究工作的不断深入与完善,越来越多的研究人员发现地质过程中存在着大量的自相似结构。分形作为研究自相似结构的有利工具,已经在地质的各个研究领域取得了良好的应用效果。成矿流体作为成矿物质的重要来源,对矿床的形成起着重要作用。由于流体沿孔隙的运移过程具有随机性,并且其运移行迹在空间上的分布具有一定的自相似性,因此可以把成矿流体的运移视为一种分形生长过程。扩散受限聚集模型(简称DLA模型)可以对自然界中存在的复杂现象进行有效的模拟,是分形生长模拟研究的有利工具。本文利用DLA模型对不同情况下成矿流体的渗透过程进行模拟,并对所得结果进行解释,在一定程度上揭示了成矿流体渗透过程的分形生长机制。从模拟结果得出:成矿流体的渗透过程展现了一种随机且稳定的生长状态。

With the continuous improvement of geological research,more and more researchers find that there are many self-similar structures in geological process.As a useful tool for the self-similar structure studying,fractal has been applied well in various geological researches.As an important source of mineral material,mineral fluid plays an important role in ore-forming.The mineral fluid that along the pore is a random process,and its migration trajectory is geometrically self-similar.So the mineral fluid can be regarded as a fractal growth process.DLA model which is a useful tool for the study of fractal growth simulation can simulate the complex phenomena that existing in nature effectively.In this paper,DLA model is used to simulate the osmotic process of mineral fluids in different situations.With the result,the fractal growth mechanism of the mineral fluids is revealed.From the simulation results,it can be concluded that the infiltration process of the fluid is a random and stable growth state,which is consistent with the actual osmotic fluid infiltration process.