The structural setting of mineralisation at Kolomela Mine, Northern Cape, South Africa, based on fully-constrained, implicit 3D modelling

3D structural control and spatial distribution of Zn-Pb-Cu grades in the Palmeirópolis VMS deposit, Brazil

“…A planar trend was fitted in each part and modelled independently with its own RBF interpolant. The main trends used for each ore body are in Table 3. The RBF interpolant used is called Intrusion in software platform (Basson et al 2016, 2018). The full workflow consists of extracting points from the drill core logs and assigning them a distance from the contact of interest, the ore body in this case.…”

“…The values are then used to calculate a spatial variogram for continuity and interpolated by RBF. A similar approach using Leapfrog software tools was used by Basson et al (2016) and Basson et al (2018) to model different geological units. As the Zn-Pb-Cu ore bodies were interpreted as occurring along with the contact between the acid and the basic metavolcanic units, two geological contact surfaces were generated with the Intrusion tool. First a contact surface between the acid metavolcanic unit (‘older’) and the ore body (‘younger’), and a second contact surface between the ore body (‘older’) and the basic metavolcanic unit (‘younger’). Finally, for detailing purposes, the interpreted cross-section polylines are added to the interpolant as control points. …”

“…(3) The RBF interpolant used is called Intrusion in software platform (Basson et al 2016(Basson et al , 2018.…”

“…The values are then used to calculate a spatial variogram for continuity and interpolated by RBF. A similar approach using Leapfrog software tools was used by Basson et al (2016) and Basson et al (2018) to model different geological units.…”

Depicting the 3D geometry of ore bodies using implicit lithological modeling: An example from the Horto-Baratinha iron deposit, Guanhães block, MG

“…It is possible to see that most of the outcrops are not in agreement with the lithological model of Figure 5, but they best-fit with the model of Figure 4. As demonstrated by Basson et al (2018), although most lithologies of the deposit are sedimentary in origin, Leapfrog Geo ® creates the models according to their geometry. In order to obtain realistic shapes in the present article, we adopted the Deposit Contact Surface for the more extensive metasedimentary lithology (XIS), and the discontinuous layers were modeled as Intrusion or Vein.…”