Numerical simulation study on ore-forming factors of the Gejiu ore deposit, China

Fan, Xin; Hu, Zhengwang; Xu, Shun-fang; Chen, Chao; Yang, Nan

doi:10.1016/j.oregeorev.2021.104209

Cited by 11 publications

(14 citation statements)

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“…Alternatively, a common practice is to directly simulate a portion of the hydrothermal ore‐forming system in a deposit model, without considering the influence of the regional model on the deposit model 9–11,33,35 . In this situation, the boundary conditions of the deposit model are roughly determined from the regional geology, without ensuring the consistency with the regional model.…”

Section: The Fem‐based Dual Length‐scale Simulation Procedures For Si...mentioning

confidence: 99%

“…With the drive of finding new mineral resources in nature, computational simulation methods have been broadly used to simulate hydrothermal ore‐forming systems within the upper crust of the Earth 1–11 . From the scientific point of view, a hydrothermal ore‐forming system usually involves the following four main processes: a pore‐fluid flow process, a heat transfer process, a mass transport process and a chemical reaction process in the fluid‐saturated porous medium.…”

Section: Introductionmentioning

confidence: 99%

“…With the drive of finding new mineral resources in nature, computational simulation methods have been broadly used to simulate hydrothermal ore-forming systems within the upper crust of the Earth. [1][2][3][4][5][6][7][8][9][10][11] From the scientific point of view, a hydrothermal ore-forming system usually involves the following four main processes: a pore-fluid flow process, a heat transfer process, a mass transport process and a chemical reaction process in the fluid-saturated porous medium. This means that for the purpose of computationally simulating a hydrothermal ore-forming system, it is necessary to mathematically consider a nonlinearly coupled problem containing the abovementioned four main processes, 6,7 so as to derive mathematical governing equations of the coupled problem in the fluid-saturated porous medium.…”

Section: Introductionmentioning

confidence: 99%

“…Although computational simulation methods have been broadly used to simulate hydrothermal ore-forming systems within the upper crust of the Earth, [9][10][11][33][34][35] they were mainly concentrated on the deposit length-scale simulations. This can lead to the following fundamental issue that it is very difficult to determine both the initial and boundary conditions of a hydrothermal ore-forming system because the ore-forming process is a past event in geology.…”

Section: Introductionmentioning

confidence: 99%

“…This means that the determined boundary conditions of a deposit model alone from considering the regional geology are inconsistent with the predicted boundary conditions of the deposit model from considering the simulation results of the corresponding regional model. Since this issue was commonly neglected, [9][10][11]33,35 it needs to be addressed in this study. Therefore, the main purpose of this study is to address this issue through conducting FEM-based dual length-scale simulation of hydrothermal ore-forming systems involving pore-fluid convective flow in fluid-saturated porous media.…”

Section: Introductionmentioning

confidence: 99%

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FEM‐based dual length‐scale simulation of hydrothermal ore‐forming systems involving convective flow in fluid‐saturated porous media

Zhao,

Liu

2023

Num Anal Meth Geomechanics

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Hydrothermal ore‐forming systems usually involve coupled processes among pore‐fluid flow, heat transfer, mass transport and chemical reactions in fluid‐saturated porous media. The finite element method (FEM) has provided a powerful tool to solve hydrothermal ore‐forming problems associated with pore‐fluid convective flow. Depending on different interests of research, a hydrothermal ore‐forming system may be simulated at two different length‐scale models, such as a regional (i.e., large length‐scale) model or a deposit (i.e., small length‐scale) model. However, there is an unsolved issue to guarantee the consistency between the applied boundary conditions to a deposit model and the predicted results, at exactly the same location as the boundary of the deposit model, from using the regional model. This paper proposes a FEM‐based dual length‐scale simulation procedure to address this issue. In the proposed procedure, a regional model of coarse mesh is first simulated by the FEM. Since a deposit model is located within the regional model, the applied boundary conditions to the deposit model of fine mesh can be determined from the simulation results of the regional model, so that the consistency can be guaranteed at the common boundary between the deposit model and the regional model. Main outcomes of this study have demonstrated that: (1) the proposed FEM‐based dual length‐scale simulation procedure is suitable and applicable for solving coupled problems involving pore‐fluid flow, heat transfer, mass transport and chemical reactions in fluid‐saturated porous media; (2) the proposed procedure is predictive because it is unnecessary to know the location of an ore deposit prior to the simulation of a hydrothermal ore‐forming system; (3) the boundary condition of a deposit model of fine mesh is consistent with the simulation results obtained from the regional model of coarse mesh, so that the reliability of the simulation results obtained from the deposit model can be ensured.

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Section: The Fem‐based Dual Length‐scale Simulation Procedures For Si...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%