Comparison of ordinary and disjunctive kriging in an Indian iron ore deposit |
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| Authors: | P S N Murthy |
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| Institution: | (1) NMDC Ltd, PO: Donimalai Township, 583 118 Bellary District, Karnataka State, India |
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| Abstract: | This paper presents the results of disjunctive kriging applied to a supergene iron ore deposit of Bailadila Range of India. Disjunctive kriging is applied firstly to compare estimates of the blocks by ordinary kriging and secondly to estimate benchwise local recoverable reserves of the orebody. Good agreement exists between block estimates by ordinary kriging and disjunctive kriging except for peripheral blocks with less borehole information. Estimation of benchwise reserves shows that the behavior of the distribution of grades is different in various benches. The study shows that disjunctive kriging can be applied successfully for estimation of local recoverable reserves in the case of a good grade hematite iron ore deposit. |
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| Keywords: | Hermitian polynomials change of support local recoverable reserves Gaussian covariance |
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