Earth Science Frontiers ›› 2021, Vol. 28 ›› Issue (3): 97-111.DOI: 10.13745/j.esf.sf.2021.1.5

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A two-way forecasting method based on numerical simulation of mineralization process for the prediction of concealed ore deposits

AN Wentong1,2(), CHEN Jianping1,2,*(), ZHU Pengfei3   

  1. 1. School of Earth Sciences and Resources,China University of Geosciences (Beijing), Beijing 100083, China
    2. Beijing Key Laboratory of Land Resources Information Research & Development, Beijing 100083, China
    3. Beijing Research Institute of Uranium Geology, Beijing 100029, China
  • Received:2021-01-10 Revised:2021-03-18 Online:2021-05-20 Published:2021-05-23
  • Contact: CHEN Jianping

Abstract:

In this paper, we propose a two-way forecasting method for locating blind orebodies based on numerical simulation of mineralization process and 3D quantitative predication. The parameters used in predicting blind orebodies were obtained by numerical simulation, and the methodology involves 3D geological modeling of large-scale blind orebodies, 3D quantitative prediction, numerical simulation, and two-way forecast and evaluation. Using this novel forecasting method, we established seven favorable prospective targets in a project test zone of the Yidinan gold deposit in Gansu Province. In the 3D quantitative prediction, we calculated the ore-forming probabilities of prospective blocks using the techniques of weigh of evidence and information value; by numerical simulation of mineralization process, we delineated the metallogenic favorable area based on the simulated distributions of prospective blocks with favorable pore pressures (pp values) and volumetric strain rates (vsr values). These application results show that using the two-way forecasting method can effectively reduce prediction uncertainty in the deep blind orebody prediction and evaluation.

Key words: 3D quantitative prediction, numerical simulation, mineralization process, two-way forecasting

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