哈萨克斯坦中部乌什卡廷III型矿床重晶石-铅成矿作用形成的数学模型

IF 0.8 Q4 METALLURGY & METALLURGICAL ENGINEERING
N. Askarova, V. Portnov, G. Rakhimova, A. Maussymbayeva, R. Madisheva
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引用次数: 0

摘要

沉积岩中铅、重晶石层状矿床的成因对补充多金属矿石储量具有重要意义。基于含矿溶液在孔隙中的运动和特征的数学模型,在考虑孔隙和裂缝纳米表面影响的情况下,建立灰岩中矿石的含氢形成规律。计算了含矿地层中灰岩、含矿矿物和硫化物矿物的表层厚度。结果表明,它们是具有不同于其他物质的特殊物理性质的纳米结构,并且在不同结构类型的矿石中形成重硫同位素的规律也证实了这一点。估计了不同密度、运动粘度和速度的热液对石灰岩裂缝和孔隙中矿化形成强度的影响,以及肢解裂隙周围新羽状裂纹的发生。建立了热液流动密度与液体扩散的关系。在确定吉布斯能的热力学条件下,由溶液流动中的压力、运动速度、成矿元素颗粒的质量和硫同位素导出了运动粘度方程。溶液的黏度与裂缝和孔隙中纳米层石灰石颗粒的表面张力的关系表明,该能量越大,成矿溶液的运动速度越大,解剖裂纹周围新形成的裂纹分支越少。该数学模型适用于裂隙中矿化规律的数值分析,考虑了裂隙纳米结构层和石灰岩孔隙对含矿地层赋存热力学条件的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mathematical model of the formation of barite-lead mineralization of the Ushkatyn III deposit (Central Kazakhstan)
The genesis of stratiform deposits of lead and barite in sedimentary rocks is of great interest from the point of view of replenishing reserves of polymetallic ores. The aim of the work is to establish the regularity of the hydrogenic formation of ores in limestones, taking into account the influence of the nanosurface of pores and cracks based on a mathematical model of the movement and characteristics of ore-bearing solutions in the pores. The thicknesses of the surface layer of limestones and minerals included in the ore-containing strata and sulfide minerals are calculated. The results indicate that they are nanostructures with special physical properties different from the rest of the substance, which is confirmed by the regularity of the formation of a heavy sulfur isotope in ores of various textural types. The influence of hydrotherms with different densities, kinematic viscosity, and velocity on the intensity of mineralization formation in cracks and pores of limestone, as well as the occurrence of new feathering cracks around the fractures of dismemberment, is estimated. The dependence of the hydrothermal flow density on the diffusion of the liquid is established. The equation of kinematic viscosity is derived from the pressure in the solution flow, the velocity of its movement, the mass of particles of ore-forming elements, and sulfur isotopes under thermodynamic conditions of determined Gibbs energies. The relationship of the viscosity of the solution with the surface tension of the nanolayer of limestone particles in cracks and pores is shown, indicating that the greater this energy, the greater the velocity of movement of ore-forming solutions, the fewer branches of newly formed cracks around the dissection crack. The mathematical model is applicable for the numerical analysis of the regularity of mineralization in cracks, taking into account the influence of the nanostructural layer of cracks and pores of limestone in the thermodynamic conditions of the occurrence of an ore-bearing formation.
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