| 基于证据权重法广西金牙-明山一带金矿产定量预测 |
| 投稿时间：2024-09-29 修订日期：2024-12-16 点此下载全文 |
| 引用本文：魏根强.基于证据权重法广西金牙-明山一带金矿产定量预测[J].地质与勘探,2025,61(1):40-53 |
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| 基金项目:中国地质调查局地质调查项目（编号：DD20242629）资助 |
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| 中文摘要:广西金牙-明山一带存在多个大中型卡林型金矿床，具备良好的金矿找矿潜力。前人工作获得了该地区地质、矿产、物、化探等多元资料，但缺乏对相关资料找矿信息的深度定量挖掘。本文基于证据权重法在广西金牙-明山一带开展卡林型金矿矿产定量预测。在系统分析金牙-明山一带区域地质背景与卡林型金矿成矿地质条件的基础上，建立研究区区域找矿模型。依据此模型选择并利用MRAS软件系统提取了成矿有利地层、岩浆岩、断裂、断裂交点、围岩蚀变和Au、As、Sb、Hg元素化探异常等多个证据因子；并基于这些证据因子计算区内各单元格（500 m × 500 m） 的成矿后验概率。综合成矿后验概率和已有的资料，在研究区圈定出19个找矿靶区。这些靶区包含了区内绝大多数矿床点所在位置，表明该预测成果的可信度较高；同时多处靶区范围包含重点矿区外围及空白区，这为该区的卡林型金矿后续找矿部署提供依据。 |
| 中文关键词:卡林型金矿 证据权法 定量预测 金牙-明山 广西 |
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| Quantitative prediction of gold deposits in the Jinya-Mingshan area of Guangxi based on evidence weighting method |
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| Abstract:There are multiple large and medium-sized carlin type gold deposits in the Jinya-Mingshan area of Guangxi, which have good potential for gold exploration. Previous work has obtained diverse data on geology, mineral resources, geophysics, and geochemical exploration in the region, but lacks in-depth quantitative exploration of relevant mineral information. This article is based on the evidence weighting method to conduct quantitative prediction of carlin type gold deposits in the Jinya-Mingshan area of Guangxi. Based on a systematic analysis of the regional geological background and carlin type gold mineralization conditions in the Jinya-Mingshan area, a regional prospecting model for the study area was established. Based on this model, multiple evidence factors were selected and extracted using the MRAS software system, including favorable mineralization strata, magmatic rocks, faults, fault intersections, surrounding rock alteration, and geochemical anomalies of Au, As, Sb, and Hg elements; And based on these evidence factors, the posterior probability of mineralization for each cell (500 m × 500 m) within the area was calculated. Based on the comprehensive posterior probability of mineralization and existing data, 19 prospecting target areas have been delineated in the study area. These target areas contain the locations of the vast majority of mineral deposits within the region, indicating a high level of reliability in the predicted results. At the same time, multiple target areas include the periphery of key mining areas and blank areas, providing a basis for the subsequent exploration and deployment of carlin type gold deposits in the area. |
| keywords:carlin type gold deposit, evidence weighting method, quantitative prediction, Jinya-Mingshan, Guangxi Province |
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