- ホーム
- > 洋書
- > 英文書
- > Science / Mathematics
Full Description
This book addresses the origin of gold deposits to answer questions of science and curiosity. These answers contribute in turn to the improved exploration and mining of gold. Initially there is a summary of the methods used to address the genesis of gold deposits including some of the essential science and concepts. Five basic observations follow that apply to many gold deposits and need to be considered in any genetic ideas. Magmatic processes enriching gold are discussed followed by the role of aqueous fluids during gold deposit formation at elevated temperatures and pressures. Modifying effects after deposit formation include high-grade metamorphism, retrogression, weathering, and erosion. The main types of gold deposits are then explained within the spectrum of viable genetic ideas, with informal names for these examples that include gold-only, gold-plus, Carlin, slate-belt, epithermal, porphyry, iron oxide copper gold, and Archean greenstone. Case histories are included inwhich the role of gold geology contributed directly to discoveries—one example is at the province-scale and another at the goldfield-scale.
Unlike other books on the subject, this one addresses virtually all gold deposit types rather than focusing on one type in isolation. The primary readership includes industry geologists, senior undergraduates, postgraduates, and those with some knowledge of science and an interest in the gold industry.
Contents
Chapter 1. Introduction.- Chapter 2. Mining and the nature of gold deposits.- Chapter 3. Data to processes, examples, and discovery.- Chapter 4. Provinciality of goldfields.- Chapter 5. Enrichment of gold above background.- Chapter 6. Segregation of gold from base metals.- Chapter 7. Timing of deposit formation.- Chapter 8. Ore fluid types as recorded in fluid inclusions.- Chapter 9. Commonality and diversity: both need explanation. Chapter 10. Magmatic processes that lead to gold-only deposits.- Chapter 11. Fluids in the earth's crust.- Chapter 12. Alteration in gold-only deposits.- Chapter 13. Case study: the formation of a giant goldfield: Kalgoorlie, Western Australia.- Chapter 14. Hydrothermal transport of gold.- Chapter 15. Metamorphic processes leading to gold-only deposits.- Chapter 16. Modification of deposits at high temperature.- Chapter 17. Formation and modification of deposits at lower temperatures.- Chapter 18. Carlin, Witwatersrand and some other gold-only examples.-Chapter 19. Gold-plus Copper-Gold deposits.- Chapter 20. Discoveries and the role of science in the Yilgarn goldfields of Western Australia.- Chapter 21. Discovery of Fosterville Deeps, Victorian Gold Province: long term science.- Chapter 22. Summary and conclusions.
