Geostatistical modeling
- Postgraduate student G.V. Plekhanov Saint Petersburg Mining University
Abstract
The results of geostatistical modeling of the upper ore horizon of Koashvin apatite-nepheline deposit are shown. The study is based on the processing of sampling data from 402 exploration wells. In addition, a reference network of 551 points was created on the basis of interpolated data with the cell dimension of 100 x 100 m. All further calculations were carried out within the exploration contour based on the use of an additional network. Kriging was chosen as a valid interpolation technique. Among the geostatistical methods, it is the most flexible and allows to process any geological data. A number of variogram models were built based on the sampling data. The presence of a significant trend was established, which led to the necessity of applying the universal kriging procedure. Data processing was carried out on the basis of the original software (ed. G.S.Porotov) according to the following algorithm - calculation of Z-coordinate in each point of the screen for each boundary as a sum of trend and kriging. The computer model of the roof of ore horizon i is similar in geological meaning to the interpretation given by geologist E.A.Kamenev to the structure of this horizon. Research results indicate the possibility of using geostatistics to solve geological problems, including objects of considerable complexity, such as the Koashva deposit.
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