(1. 中南大學(xué) 有色金屬成礦預(yù)測教育部重點實驗室，長沙 410083；
2. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長沙 410083；
3. 山金西部地質(zhì)礦產(chǎn)勘查有限公司，西寧 810016；
4. 湖南科技大學(xué)，湘潭 411201)
摘 要: 針對隱伏礦體立體定量預(yù)測結(jié)果的可靠性問題，以及磁法正反演模型一直存在的地質(zhì)依據(jù)不足和多解性問題，提出隱伏礦體立體預(yù)測體元模型與磁法正演模型在定量層面上相結(jié)合的新方法。利用體元模型的特點，結(jié)合磁荷面積分公式，推導(dǎo)出基于隱伏礦體立體預(yù)測體元模型的總磁場異常的數(shù)學(xué)模型，并進(jìn)行算法設(shè)計和軟件開發(fā)。以福建省尤溪縣丁家山鉛鋅礦床為實例，計算得到研究區(qū)域的總磁場異常，繪制基于已知礦化體、預(yù)測礦化體及已知礦化體總體的理論總磁場異常等值線圖，分別與實測等值線圖進(jìn)行比較分析。研究結(jié)果表明：以體元模型為紐帶，可實現(xiàn)隱伏礦體立體定量預(yù)測結(jié)果與磁性體正演結(jié)果的耦合與互補，檢驗隱伏礦體立體定量預(yù)測結(jié)果的正確性，有效地降低隱伏礦體立體定量預(yù)測的風(fēng)險。
關(guān)鍵字: 隱伏礦體立體預(yù)測；體元模型；磁法正演模型
stereoscopic prediction of concealed ore body
（1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,
Central South University, Changsha 410083, China;
2. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
3. Shanjin Western Geological and Mineral Exploration Co., Ltd., Xining 810016, China;
4. Hunan University of Science and Technology, Xiangtan 411201, China）
Abstract:Aiming at the problem of reliability in stereoscopic quantitative prediction of concealed ore body, and the problem of geological basis shortage and multi-solutions in magnetic forward and inverse models, a new method combining the voxel model of stereoscopic prediction of concealed ore body with magnetic forward model at the quantitative level was put forward. By use of the voxel model and the formula for magnetic charge surface integral, the mathematical model of the total magnetic field anomalies based on the voxel model of stereoscopic prediction of concealed ore bodies was deduced, the algorithm and software for solving the model were designed and developed. A case study was performed in Dingjiashan lead-zinc deposit in Youxi County, Fujian Province, China. The total magnetic field anomalies of the study area were achieved, the contour maps about theoretical total magnetic field anomalies were drawn on the basis of the known mineralization bodies, the amalgam of the predictive mineralization bodies and the known mineralization bodies, and the comparison analysis between the theoretical contour maps and the actual contour maps was made. The results show that this method, taking the voxel model as the link bridge, can achieve the coupling and complementarities of the stereoscopic quantitative prediction results of concealed ore bodies with the magnetic body forward results, and test the accuracy of the prediction results, and effectively lower the risk of the prediction of concealed ore bodies.
Key words: stereoscopic prediction of concealed ore body; voxel model; magnetic forward model
