"The first chapter provides an overview of current leach operations while the next two examine the treatment of problem ores (carbonaceous, sulfidic and manganiferous). The next group of papers deals with heap leaching, an approach now gaining favor due to its low cost, rapid implementation and relative simplicity. These are followed by a paper on combined flotation and leaching. All these commercial leach operations utilize cyanide lixiviants and the next two chapters deal with treatment of such solutions to recover the values and avoid discharge of hazardous wastes. Use of thiourea as an alternative to cyanide is discussed in the following papers while assay methods and problems are covered in the twelfth paper. Substantive contributors by bankers, consultants and commodity traders have [also] been included in this volume."--Preface.