| 矿床模型法在吉林省镍矿资源总量预测中的应用 |
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| 引用本文：.1985.The application of the ore deposit modeling to the prediction of the nickel resource totality in Jilin province[J].Mineral Deposits,4(2):77~87 |
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| The application of the ore deposit modeling to the prediction of the nickel resource totality in Jilin province |
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| Abstract:The ore deposit modeling is an excellent method widely used both at home and abroad in that it depends intimately upon the theory and regularity of mineralization. In studying and predicting the nickel resource totality in Jilin Province, the authors have proposed ore field model, ore zone model and the unit model for the whole province. Through analyzing the data from the First Regional Planning, and adopting various mathematical methods, they have calculated E, F and G classes of the nickel resource totality, redivided the prospecting areas and made a quantitative correlation between the main controlling factors of mineralization and indicators for prospecting. Two models of ore fields, the H ore field and the Z ore field, have been established according respectively to the ore-bearing units and the ore-bearing rock masses. Three calculation methods of characteristic analysis have been used for the quantification of the characteristics of the above two models, whereby the simplified models Can be established．With the equation, the degree of match of the predicting units(or rock masses)can be calculated. With the aid of the equations, the ore-detection probability of each predicting unit can be calculated so as to select favorably the target areas for further exploration．The quantitative prediction of the ore field has been carried out by means of an unary linear regression equation derived from the relationship between the degree of match and the reserves(109arithm)calculated by the product matrix(main weight method), of the characteristic analysis. The ore zone model, established under the condition of discordance of the data level of the ore field model, is a prediction model with intermediate precision. The geosynclines and platform areas are included, and the model for the former area(model of the Siping-Yanbian ore belt)is established by characteristic analysis in combination with the Monte-Carlo method. With the computer simulation, the nickel resource totality of this ore belt is obtained by the equation: M=T.C.L where L is the normalized value of the degree of match of the characteristic analysis. The unit model for the whole province is a model of regional mineralization, which is established by the unit prediction method. A table of initial data has been drawn up by selecting the values of logical regular operation. Finally, the authors have predicted six units of potential resources. The establishment of the above-mentioned three kinds of model permits the materials and data of different precision to be used comprehensively, and three classes(E, F and G)of nickel resource totality to be predicted. It is helpful to use the greatest possible varieties of mathematical methods, and the study of the variables as well as the simplification is of key importance in prediction. The simplified model serves to be aⅡimportant approach in predicting an area of less investigation, and therefore deserves detailed study. The results of the study presented in this paper indicate that the method of ore deposit model is an important approach which can deepen the study of the traditional ore deposit prediction and turn it to a quantitative prediction. The prediction corresponds to the geological regularities, and the method is hence worthy to be popularized. |
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