Abstract
Geostatistics resources estimation of the copper (Cu) grade values was carried out in the “Hierro Mantua” mineral deposit, which is located at the northwest of Pinar del Río province, Cuba. The geologic complexities in the region of the deposit indicate the nonexistence of homogeneity in the Cu values. The structural analysis showed a high asymmetric distribution in the variable studied. The nonexistence of normality was verified by different mean and median values, a coefficient of variability greater than one, and the moving windows statistics of the mean was different. Under the previous conditions, the data was log transformed to assure the necessary stationarity in them and consequently to achieve an adequate accuracy in the resources estimation, using a rational selective mining unit (SMU). The log-transformed data revealed a homogeneous behavior in Cu grade values, demonstrated by better results in basic and moving windows statistics. Semivariograms showed defined structures with anisotropy in the 0° and 90° directions (considering 0 to the north). To apply the lognormal kriging estimation is the main objective of this work, because of the complexities of the geology in the studied area.
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Díaz-Carmona, A., Cuador-Gil, J.Q., Giménez-Palomares, F., Monosoriu-Serra, J.A. (2017). Complexities in the Geostatistical Estimation of Besshi-Type Mineral Deposits on the Northwest of Pinar del Río, Cuba. In: Gómez-Hernández, J., Rodrigo-Ilarri, J., Rodrigo-Clavero, M., Cassiraga, E., Vargas-Guzmán, J. (eds) Geostatistics Valencia 2016. Quantitative Geology and Geostatistics, vol 19. Springer, Cham. https://doi.org/10.1007/978-3-319-46819-8_11
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