Author: Ed DeWitt
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 44

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Book Description

Author: Neil Phillips
Publisher: Springer Nature
ISBN: 981163081X
Category : Science
Languages : en
Pages : 294

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Book 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 in which 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.

Author: John Parnell
Publisher: Springer Science & Business Media
ISBN: 3642858066
Category : Science
Languages : en
Pages : 567

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Book Description
This volume covers the occurrence, interpretation and significance of bitumens (hydrocarbon residues) in ore deposits. Bitumens occur with a wide variety of ores, including deposits of base metals, mercury, uranium, gold and other precious metals. The papers included reflect this variety of bitumen occurrences and the potential for obtaining useful data from them. The contributions are written by acknowledged experts in this field, who cover analytical techniques and case studies using diverse petrographic and geochemical approaches which will give ore geologists and geochemists an excellent insight into the interpretation of bitumens during mineral exploration. The large number of plates in particular will help the non-specialist to make good use of the volume through the application to new deposits. This is the most comprehensive set of contributions published on a subject of growing interest; at a time when explorationists are increasingly recognising the occurrence of bitumens in ore deposits and the fact that the evolution of mineralising fluids and hydrocarbon fluids may be closely interlinked.

Author: Jeffrey W. Hedenquist
Publisher:
ISBN: 9781887483018
Category :
Languages : en
Pages : 0

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Book Description

Author: Steffen Gerd Hagemann
Publisher:
ISBN:
Category : Gold
Languages : en
Pages : 584

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Book Description

Author: A. C. Colvine
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 164

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Book Description

Author: Warren E. Yeend
Publisher:
ISBN:
Category : Gold mines and mining
Languages : en
Pages : 28

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Book Description

Author:
Publisher:
ISBN: 9781629493121
Category : Geology, Economic
Languages : en
Pages : 845

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Book Description

Author: Ted G. Theodore
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 308

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Book Description

Author: G.R.T. Jenkin
Publisher: Geological Society of London
ISBN: 1862396264
Category : Science
Languages : en
Pages : 335

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Book Description
Ore deposits form by a variety of natural processes that concentrate elements into a volume that can be economically mined. Their type, character and abundance reflect the environment in which they formed and thus they preserve key evidence for the evolution of magmatic and tectonic processes, the state of the atmosphere and hydrosphere, and the evolution of life over geological time. This volume presents 13 papers on topical subjects in ore deposit research viewed in the context of Earth evolution. These diverse, yet interlinked, papers cover topics including: controls on the temporal and spatial distribution of ore deposits; the sources of fluid, gold and other components of orogenic gold deposits; the degree of oxygenation in the Neoproterozoic ocean; bacterial immobilization of gold in the semi-arid near-surface environment; and mineral resources for the future, including issues of resource estimation, sustainability of supply and the criticality of certain elements to society.