| 流体包裹体研究对成矿流体动力学模式的制约 |
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| 引用本文： | 池国祥.流体包裹体研究对成矿流体动力学模式的制约[J].岩石学报,2015,31(4):907-917. |
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| 作者姓名： | 池国祥 |
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| 作者单位： | 加拿大里贾纳大学地质系 |
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| 基金项目： | 本文受NSERC-Discovery资助. |
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| 摘 要： | 热液矿床的形成既包括地球化学过程也包括流体动力学过程,后者主要研究成矿流体的驱动力、流动方向、速度及持续时间。流体及金属的来源,金属在热液中的溶解度及溶解机制,以及矿石的沉淀机制等可以通过多种地球化学手段来研究,而流体动力学过程的确定相对比较困难。流体包裹体分析不仅可以为成矿地球化学过程,而且可为流体动力学过程提供制约,因为流体包裹体研究所得到的流体P-V-T-X性质与流体流动、热传导及质量迁移等控制方程直接相关。本文阐述流体包裹体与流体动力学研究的理论关系,流体包裹体研究对已有成矿流体动力学模式的贡献,以及未来的研究方向。从流体包裹体研究得出的流体压力状态为岩浆热液及造山型成矿系统的超压驱动模式提供了关键的证据。流体包裹体均一温度及其分布为沉积盆地成矿流体动力学模式提供了重要的制约。流体包裹体研究在揭示流体混合及流体相分离等重要成矿过程方面提到了至关重要的作用,但它们在研究流体混合及多相流体流动的物理过程方面的潜力有待进一步开发。精心设计的流体包裹体研究有可能应用于古流体流动数值模型的调试。
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| 关 键 词： | 流体包裹体 流体动力学 成矿作用 流体流动 流体压力状态 |
| 收稿时间： | 4/6/2013 12:00:00 AM |
| 修稿时间： | 2013/11/24 0:00:00 |
Constraints from fluid inclusion studies on hydrodynamic models of mineralization |
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| CHI GuoXiang.Constraints from fluid inclusion studies on hydrodynamic models of mineralization[J].Acta Petrologica Sinica,2015,31(4):907-917. |
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| Authors: | CHI GuoXiang |
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| Institution: | Department of Geology, University of Regina, Regina, Saskatchewan S4S 0A2, Canada |
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| Abstract: | The formation of hydrothermal mineral deposits involves both geochemical and hydrodynamic processes, the latter dealing with the driving forces of fluid flow, flow direction, velocity and duration. While the sources of fluids and metals, the solubility of metals and their speciation in hydrothermal solutions, and the ore deposition mechanisms can be examined with many different geochemical methods, the hydrodynamic processes are relatively difficult to evaluate. Fluid inclusion analysis is a powerful tool that not only can provide constraints on geochemical processes of mineralization, but also bears directly on the dynamics of fluid flow. This is because fluid inclusion studies can provide information about the P-V-T-X properties of the fluids, which are explicitly involved in the governing equations of fluid flow, heat transfer and mass transport. This paper examines the fundamental relationships between fluid inclusion and hydrodynamic studies, reviews various contributions that fluid inclusion studies have made on current hydrodynamic models of mineralization, and discusses research directions in the future. Fluid pressure regimes inferred from fluid inclusion studies have provided key evidence for overpressure-driven fluid flow models in magmatic-hydrothermal and orogenic mineralization systems, while fluid inclusion homogenization temperature data have made important contributions to fluid flow models associated with mineralization in sedimentary basins. Fluid inclusion studies have been pivotal in revealing fluid mixing and fluid phase separation as important mineralization processes, but their potential roles in deciphering the physical processes of fluid mixing and multiphase flow have yet to be explored. Fluid inclusion studies may be purposely designed to verify hydrodynamic models, with the ultimate goal of "calibrating" numerical models of paleo-fluid flow. |
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| Keywords: | Fluid inclusions Hydrodynamic Mineralization Fluid flow Fluid pressure regime |
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