Renard and Beucher reported in June 2012 that a method has been developed to construct a three-dimensional (3D) block within units whose spatial characteristics are similar to those of a uranium roll-front deposit. In order to mimic the particular uranium roll-front deposits, a specific stochastic model has been developed, using some geostatistical simulation concepts. They refer to the well-established PluriGaussian Simulation model which has been rephrased in order to produce the specific ore body shapes.
The Shadow PGS is a new method developed to generate apicture of a uranium roll-front deposit. It is constructed asan extension of the traditional PGSs which ensures thepossibility to generate several outcomes using a modelbased on a limited set of parameters while honouring a set of facies data. It takes advantage of the usual tools such asthe proportion matrix for the oxidised facies, but alsointroduces a few additional parameters such as the lightincidence and the different thresholds.
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