Skip to Main Content
Book Chapter

Solubility of Ore Minerals and Complexation of Ore Metals in Hydrothermal Solutions

By
Scott A. Wood
Scott A. Wood
Department of Geology and Geological Engineering, University of Idaho
,
Moscow, Idaho 83844-3022
Search for other works by this author on:
Iain M. Samson
Iain M. Samson
Earth Sciences, University of Windsor
,
Windsor; Ontario, Canada N9B 3P4
Search for other works by this author on:
Published:
January 01, 1998

Abstract

Knowledge of the solubility of ore minerals and the speciation of ore metals in hydrothermal solutions is required for a complete understanding of the genesis of hydrothermal ores. In this chapter, we explore the factors that control solubility and speciation, demonstrate how to carry out quantitative calculations, and review the current state of knowledge for a number of economically important metals. The term solubility refers to the sum of the concentrations of all dissolved forms of a given metal in a hydrothermal solution in equilibrium with a mineral (or minerals) containing that metal. We use the term speciation to denote the relative concentrations of the various forms of a metal in solution.

The solubility of a mineral provides an upper limit to the amount of dissolved metal that a hydrothermal fluid can transport, assuming thermodynamic equilibrium. Although a given solution may temporarily carry more metal than permitted by the equilibrium solubility of relevant minerals owing to sluggish reaction kinetics, the equilibrium solubility is nevertheless an important benchmark. Given enough time, equilibrium solubility cannot be exceeded, and systems will proceed in a direction toward the equilibrium state. Also, knowledge of equilibrium solubilities is required for modeling rate processes. Metal concentrations may be maintained below the equilibrium solubility either by sorption processes, which remove metals from solution before saturation is reached with respect to a given mineral, or if there is insufficient metal available in the system to saturate the solution. pointed out in Chapter 1, the extent to which a solution

You do not currently have access to this article.

Figures & Tables

Contents

Reviews in Economic Geology

Techniques in Hydrothermal Ore Deposits Geology

Jeremy P. Richards
Jeremy P. Richards
Department of Earth and Atmospheric Sciences University of Alberta Edmonton, Alberta, Canada T6G 2E3
Search for other works by this author on:
Peter B. Larson
Peter B. Larson
Department of Geology Washington State University Pullman, Washington 99164
Search for other works by this author on:
Society of Economic Geologists
Volume
10
ISBN electronic:
9781629490175
Publication date:
January 01, 1998

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal