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构造-流体耦合有限元模拟:以石英脉型钨矿为例
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  • 英文篇名:FINITE-ELEMENT SIMULATIONS OF STRUCTURE-FLUID COUPLING:A CASE STUDY IN VEIN-TYPE TUNGSTEN DEPOSITS
  • 作者:刘向冲
  • 英文作者:LIU Xiangchong;Institute of Geomechanics,Chinese Academy of Geological Sciences;The Laboratory of Dynamic Digenesis and Metallogenesis,Institute of Geomechanics,CAGS;
  • 关键词:钨矿 ; 数值模拟 ; 聚焦流动 ; 五层楼 ; 水力破裂 ; 黑钨矿沉淀 ; CO2逃逸
  • 英文关键词:tungsten deposits;;numerical simulation;;fluid focusing;;five-floor zonation;;hydraulic fracturing;;wolframite precipitation;;CO2 escaping
  • 中文刊名:地质力学学报
  • 英文刊名:Journal of Geomechanics
  • 机构:中国地质科学院地质力学研究所;中国地质科学院地质力学研究所动力成岩成矿实验室;
  • 出版日期:2019-05-15
  • 出版单位:地质力学学报
  • 年:2019
  • 期:S1
  • 基金:国家自然科学基金(41602088);; 中国地质科学院基本科研业务费(JYYWF20180602,DZLXJK201603)
  • 语种:中文;
  • 页:168-174
  • 页数:7
  • CN:11-3672/P
  • ISSN:1006-6616
  • 分类号:P618.67
摘要
热液矿床成矿作用动力学过程涉及多时空高度耦合的物理和化学过程。数值模拟是研究这一复杂动力学过程的重要而有效的工具之一,也可在找矿预测等方面发挥重要作用。以南岭地区石英脉钨矿床为例,利用计算机求解控制构造-流体的物理和化学方程,定量揭示成矿热液聚焦流动与"五层楼"成矿的对应关系,正演高压成矿流体致使围岩发生水力破裂及其成矿效应。模拟结果与石英脉型钨矿床的构造地球化学特征相符。
        The dynamic process of hydrothermal ore-forming involves highly coupled physical and chemical processes at different spatial and temporal scales. Numerical simulation is one of important and effective tools to decipher these complex processes and aids in prospecting. The vein-type tungsten deposits in the Nanling Range are taken examples to show how to solve the physical and chemical equations controlling the coupled structure-fluids using numerical simulation,decipher the relationships between fluid focusing and the tungsten mineralization in the five-floor vertically morphological zonation quantitatively,and reproduce the influences of hydraulic fracturing driven by high-pressure fluids on wolframite precipitation. The numerical results are consistent with the geochemical characteristics constrained by previous studies.
引文
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