Browsing by Subject "semiwariogramy"

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Access status: Open Access ,
Trójwymiarowe modelowanie wartości parametrów złożowych metodą krigingu zwyczajnego 3D
(Wydawnictwa AGH, 2009) Mucha, Jacek; Wasilewska-Błaszczyk, Monika
The principles of 3D modelling of deposit parameters by means of geostatistical procedure of 3D ordinary kriging were outlined. The use of the procedure was illustrated by example of Cu content assessment in exploitation blocks in a one of the deposits Cu-Ag from Fore-Sudetic Monocline. A new classification of accuracy of mean Cu content estimation in exploitation blocks was proposed.
Access status: Metadata only ,
Zasoby konkrecji - procedury i wymagania dla ich szacowania na przykładzie obszaru IOM w polu Clarion-Clipperton
(Wydawnictwa AGH, 2011) Mucha, Jacek; Kotliński, Ryszard; Wasilewska-Błaszczyk, Monika
International Joint Organization (IOM) is the contractor of International Seabed Authority since 2001 and has the exclusive rights for exploration of polymetallic nodules within a 75000 km square area situated in the Clarion-Clipperton fracture zone in the Pacific. The main factors affecting estimation accuracy of the nodules resources in the IOM area have been described and particularly: distinctive feature of deposit, structure of nodules variability and strategy of deposit exploration. The results of the geostatistical analysis of nodule accumulation variability and the nodule resources estimation using of the ordinary kriging procedure have been presented. The variability of the nodule accumulation is high with the coefficient of variation about 60-70% and reveals a strong contribution of the random component and small range of autocorrelation. In the great scale observation (> 50 km) the week anisotropic style of nodule accumulation variability has been observed with the N-S direction of minimal variability, compatible with the elongations of the ore fields. The accuracy of the nodule resources estimation is very differentiated in dependence on the dimensions of the calculation blocks with the median of the kriging errors (for the 95% confidence level) from 70% (for blocks 0.5 X 0.5 km) to 10% for the large blocks (4000 $km^{2}$) The results of two phases of sampling in a part of the IOM area have been compared. The assessments of nodules resources for data of both sampling are very close. The need of the accuracy analysis of the nodule fields surface assessment for more reliable nodule resources estimation has been emphasized. Increasing resource estimation accuracy can be achieved by the implementation of the results of the multi-beam echo sounding and seafloor photographic surveys.