高校地质学报2025，Vol.31Issue(3)：346-362,17.DOI:10.16108/j.issn1006-7493.2024045
甘肃早子沟金矿区构造应力场数值模拟研究
Numerical Simulation of Tectonic Stress Field in Zaozigou Gold Mining Area,Gansu Province,China
摘要
Abstract
The Zaozigou gold deposit in Gansu Province is situated within the Xiahe-Hezuo area of the West Qinling Mountains.It represents a significant polymetallic gold deposit within the West Qinling metallogenic belt,exhibiting a high degree of mineralization that is closely associated with the regional tectonic activity.By examining the tectonic and geological characteristics of the mining area,with a particular focus on faults,joints,and scuff marks,the evolutionary sequence of the ore-controlling structures and the principal stress directions of the Zaozigou gold deposit have been determined.It is hypothesized that the tectonic evolution of the gold deposits in Zaozigou underwent three phases and six stages.In order to comprehend the distribution pattern and extent of the tectonic stress field within the mining region,a structural stress field analysis and a series of rock mechanics experiments were conducted,with the objectives of determining the mechanical parameters of the rocks and establishing a geologically logical mechanical model.A two-dimensional structural stress field numerical simulation of the Zaozigou gold mining area was conducted using the Finite Element Method(FEM),with the objective of predicting favorable sites for mineralization.The results demonstrate that the distribution of the tectonic stress field in the mining area is governed by the rupture.Furthermore,the maximum and minimum stress values in each period are predominantly concentrated at the periphery of the rupture.The intensity of stress is the primary factor in governing tectonic activity,with high stress areas exhibiting heightened structural activity and rock fragmentation,thereby creating pathways and sites conducive to mineralization.It is hypothesized that the two ends of the near-north-south faults and the intersection of the north-east and north-west faults represent optimal locations for mineralization.关键词
构造演化/构造应力场/有限元法/数值模拟/早子沟金矿床Key words
tectonic evolution/tectonic stress field/finite-element method/numerical simulation/Zaozigou gold deposit分类
地质学引用本文复制引用
杨剑,张卫雄,陈爱兵,翟向华,张元,姜鑫,胡杨,李永恒..甘肃早子沟金矿区构造应力场数值模拟研究[J].高校地质学报,2025,31(3):346-362,17.基金项目
国家自然科学基金项目(42072094) （42072094）
校企合作项目(2023FW62)联合资助 （2023FW62）
