Gestatistical Case Studies / Геостатистические тематические исследования

The objective of this paper is to show how well known the structure is for a particular uranium deposit. After presenting the average vertical variogram for all the holes, some of the individual variograms will be studied and we will show the influence of a few very rich holes on the overall variogram. This turns out to be poorly defined. The first order variogram, which also has been considered, is curiously similar to the usual variogram, whereas the structure of the translated logarithm proves to be better known. <...>

J. RIVOIRARD / Computing Variograms on Uranium Data 

P. CHAUVET / The Comparison Between the Gamma Logs and the Grades in the Estimation of a Uranium Deposit

P. A. DOWD and D. W. MILTON / Geostatistical Estimation of a Section of the Perseverance Nickel Deposit

G. CAPELLO, M. GUARASCIO, A. LIBERTA, L. SALVATO, and G. SANNA / Multipurpose Geostatistical Modelling of a Bauxite Ore body in Sardinia 

L. MOINARD / Application of Kriging to the Mapping of a Reef from Wireline Logs and Seismic Data; A Case History 

A. GALLI and G. MEUNIER / Study of a Gas Reservoir Using the External Drift Method 

CH. KA VOURINOS / The Grade-Tonnage Curves for a Zinc Mine in France 

A. ZAUPA REMACRE / Conditioning by the Panel Grade for Recovery Estimation of Non-Homogeneous Orebodies 

D. GUIBAL / Recoverable Reserves Estimation at an Australian Gold Project 

H. SANS and J. R. BLAISE / Comparing Estimated Uranium Grades with Production Figures 

C. DEMANGE, CH. LAJAUNIE, CH. LANTUEJOUL, and 1. RIVOIRARD / Global Recoverable Reserves: Testing Various Changes of Support Models on Uranium Data 

L. DE CHAMBURJ;, CH. DE FOUQUET, and H. FRAISSE / Calculating Ore Reserves Subject to Mining Constraints, for a Uranium Deposit