Mining investment in Argentina.- Bolivia - its potential and recent activity.- Investment in mining: the Canadian experience.- Restructuring of Mexico's mining sector: an international model.- Application of advanced computer-based systems in open-pit evaluation.- Myth and reality: status report on computer open-pit optimization algorithms in the 1990s.- Construction of the Kori Kollo gold plant, Bolivia.- La Coipa modified grinding circuit, Chile.- Optimization of control systems for mineral processing.- Practical implementation of the bacterial oxidation process of refractory gold ores.- The Geoscan Airborne Multispectral Scanner as an exploration tool applied to El Halcón prospect, Chile.- Silver mineralization at San Bartolomé, Azuay, Ecuador.- Development of the Collahuasi copper deposits - a world-class copper project in the Andes of northern Chile.- Sulphuric acid plant installation - Ilo smelter, Peru.- Reduction of leach-solvent extraction - electrowinning plant costs by attention to engineering.- Southern Peru Copper Corporation's Toquepala and Cuajone leach projects, Peru.- Advanced methods of coalescing and filtration.- From mine to customer - the marine connection.- Mean and lean - conveyor design for the 1990s.- Economic advantages of belt conveying in open-pit mining.- Future of pneumatics in percussive drilling - the South African experience.- Aplicación de un modelo de fragmentación de rocas en la reducción de los costos de voladura en minería.- Quality excavation with instrumented and automated drilling equipment.- Lower costs and higher productivity by use of mechanization in Chilean underground mining.- Tunnel-boring machine for Magma Copper Co. mine development.- Environmental management in the mining sector.- Reconciliation of mining with the concept of sustainable development: Minas Gerais, Brazil.- Arsenic removal in anode refining by flux injection.- Scrap melting in a rotary furnace with use of oxy-fuel burners.- Ausmelt's top submerged lance technology applied to copper smelting.- Investigation of silver extraction from a silver-sulphur flotation concentrate from the electrolytic zinc plant of Companhia Paraibuna de Metais, Juiz de Fora, Brazil.