407 On the other hand, since the metallurgical response of each MTA is known, the extraction or recovery percentages can be optimized at lower costs, as the content block by block of critical minerals will also be known; furthermore, this version of Geometallurgy also allows, through GFUs, the optimization of blasting and consequently reduction of mechanical comminution costs. ACKNOWLEDGEMENTS I must sincerely thank José Vizquerra, Miroslav Kalinaj and Percy Salazar of MINSUR SA, for the permission granted to mention Pucamarca; as well as Roque Benavides and JC Salazar, of Compañía de Minas Buenaventura SAA for authorization to include San Gabriel as an example in this paper. REFERENCES Canchaya S. (2008) El Modelo Geometalúrgico. XVII Congreso Peruano de Geología and XIII Congreso Latinoamericano de Geología; Lima 29 de Set. a 3 de Oct. 2008; 6 p. Canchaya S. (2012) Density and Mechanical Competence, main physical and mechanical variables in Geometallurgical Models. Proceedings GEOMET 2012 International Seminar on Geometallurgy; Santiago de Chile 5 al 7 Dic. 2012: 24-25. Canchaya S. (2016) Espectrometría FTNIR semi-cuantitativa, herramienta principal para implementar la data geometalúrgica. Proceedings GEOMET 2016 International Seminar on Geometallurgy; Lima-Perú. Canchaya S. (2019) Geometallurgical block model based on mineralogical-textural assemblages (MTA) and geological fragmentation units (GFU).- Procemin – GEOMET 2019; Sgo de Chile, 20 al 22 de Nov. Canchaya S. & Arias V & Dávila L & Gómez K & Grados B & Morales M & Pretell R & Salinas E & Terrones L & Valdivia A & Valverde J & Zulueta T (2019) Caracterización y modelado geo-metalúrgico del yac. Pucamarca; Tacna-Perú; Corte 2019-23.- Rep. priv. Tacna. Marzo 2019; 71 p. Canchaya S. & Baumgarntner R. & Gaibor A. & Trueman A. (2013) Bulk density for Resource Estimation and Geometallurgical Purposes - Canahuire Au-Cu-Ag Deposit, Southern Peru. 6th World Conference on Sampling and Blending (WCSB6); Lima 19 al 22 Nov. 2013; 1 p. Fennel M. & Guevara J. & Canchaya S. & Baum W. & Velarde G. & Gotlieb P. (2005) QEMSCAN Mineral Analysis for Ore Characterization and Plant Support at Cerro Verde. XXVII Conv. Minera; 11 p. Gy P. (1992) Sampling of Heterogeneous and Dynamic Material Systems. Theories of Heterogeneity, Sampling and Homogenizing. Elsevier, New York; ISBN 0-444-896015. Gy P. (1999) Sampling for Analytical Purposes. John Wiley & Sons, New York; 153 p.
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