The Study Of The Complexity Of Tectonic-Fluid-Mineralization System And Its Dynamic Mechanism

Ore-forming system is an important part of the material system of the Earth. Ore-forming is a complex dynamic system and a complex dynamic process coupled multicomponents and multi- processes. The dominant processes are tectonics and fluid, and the coupling of structural deformation, fluid flow and mineralization construct an unitive dynamic system-tectonic-fluid-mineralization system. Using fractal and chaotic theory, the paper researches the fractal and multifractal character of fractures, fractal and chaotic character of spatial distribution ore-forming element of Shuikoushan Pb-Zn-Au polymetallic ore field, Hunan, China. And what's more, along with the nonlinearity ore-forming dynamics numerical simulation, the complex of tectonic-fluid-mineralization system and its dynamic mechanism are analysed and discussed in this paper.The deposits in the Shuikoushan Pb-Zn-Au polymetallic ore field are epithermal deposit and their mineralizations have closed correlation with tectonic deformation and fluid processs. The geological and geochemical data indicate that ore-forming material major come from upper crust and a part of them come from anatectic magma and the ore-forming fluid major transfer along fractures from down to up and deposit at the appropriate site. The fractures in this ore field are multifractal distribution. Not only from all faults, uncertain property faults to reverse thrust faults, but also from all faults, ore bearing area faults to barren area faults, all of the maximum of f(a), the size of x(q) variation range, the size of a(q) variation range, the left point of intersection of f(a) and X axis show a decrease successively tendency and indicate their complex have the same change tendency.The geochemical exploration data of Mawangtang area and Xinmengshan area show fractal and multifractal distribution and the 2 D geochemical exploration curved surfaces have bifractal relation. The fractal values indicate that the Au distribution of Xinmengshanarea more complex than Mawangtang area and ore-forming elements of both two area have a high grade of concentration, and what's more, the geochemical field show a local enrichment superposition.The fractal analyses of element content of ore field stratum, granite body and fractute zone indicate stratum and granite body can only show the original element distribution but fractute zone show two geological processes control the element distribution. The deuteric superposition processes increse the enrichment of some high activity elements. Furthermore, the little fractal value can show mineralization and F5 and F16 fracture zones show a good ore prospecting forefround.Numerical simulating studies indicate that minerals grow in a relatively free space is a fractal aggregate process and the fractal dimension values will decrease increase along with the increase of sticking probability to the flat surface Pg and increase with the increase of gravitation field intension between ions. The fracture structure is an important role for controlling on hydrothermal mineralization. One of the most important sides is to increase remarkably rock permeability through all kinds of coupling and feedback processs among the tectonic-fluid dynamic system, furthermore, with the best structure-rock combination, to form a long time persistence high fracture permeability zone and therefore lead large scale deposition.In conclusion, the deposition of ore-forming material is a complex nonlinearity dynamics processs. Through all kinds of coupling and feedback processs among the tectonic stress, fluid flow, fluid-rock reaction, minerals deposition at the appropriate site in fault structures al last and then form epithermal deposits with fractal and chaotic character.