Tata AIG General Insurance Company - Insurer Innovation Award 2024
Slides Chile
1. Application of categorical variables to improve estimation in the Amapari Lateritic Gold Mine, Brazil Francisco J. da Silva(UFRRJ) Luis P. Braga(UFRJ) Claudio G. Porto(UFRJ) Alfredo R. Nunes(MPBA) Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008
4. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 The Amapari gold mine is situated in the Amapá Estate, North Brazil, where humid equatorial climatic conditions prevail. Under these conditions weathering is extremely aggressive resulting in thick regolith profiles of lateritic nature where the gold distribution differs substantially from that observed in the fresh ore.
5. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 The complexity of the lateritic profile is due to the multiform characteristics of the alteration process which makes it difficult to properly define geological boundaries.
6. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 The redistribution of the gold grades due to weathering factors creates a geometry for the mineralization which hardly conforms with mapeable units in a more traditional sense. In reality, the alteration process creates an intricate geological framework which strongly conditions the spatial modelling.
31. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 SET 2 VALIDATION BLOCK “ TRUE VALUES” F HOLE CLUSTER 1 F HOLE CLUSTER 2 FD HOLE TRUE VALUES = KRIGING BLOCK VALUES F + FD HOLES
32. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 SET 2 VALIDATION BLOCK “ TRUE VALUES F HOLE USUAL KRIGING NEIGHBOURHOOD (KP) F HOLES
33. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 SET 2 VALIDATION BLOCK F HOLE CLUSTER 1 F HOLE CLUSTER 2 CLUSTER 2 BASED NEIGHBOURHOOD (KMCKP)
34. Eight International Geostatistics Congress. Santiago, Chile, December 1-5, 2008 SET 2 VALIDATION BLOCK F HOLE CLUSTER 1 F HOLE CLUSTER 2 CLUSTER 2 BASED NEIGHBOURHOOD (KMCKP)