User:Catherine.McCammon

Introduction

Oxygen fugacity can be a challenging concept, so I have provided some additional materials to work through for those that are interested. They are based on a course on oxygen fugacity that I developed, and include both lecture material and self-guided practical exercises.

Lectures

Part I [|slides]

1. Introduction

2. Thermodynamics

3. Controlling oxygen fugacity at 1 bar

Part II [|slides]

4. Controlling oxygen fugacity at high pressure

5. Measuring oxygen fugacity: experiment

6. Measuring oxygen fugacity: nature

Practical exercises

Part I instructions

1. Glass synthesis under different fO2 conditions

2. Gas mixing experiment

3. Oxygen buffers for high pressure experiments and relative fO2

4. Further problems to explore at your leisure

Part II instructions

5. Oxygen barometry and Fe3+/ΣFe in melts/glasses

6. Oxygen barometry and Fe3+/ΣFe in spinel peridotite

7. Oxygen barometry and Fe3+/ΣFe in garnet peridotite

The Excel template for both parts of the practical exercises is here.

Background reading

Anderson, GM (2005) Thermodynamics of Natural Systems, 2nd edition. Cambridge University Press.

Chap 8: Fugacity and activity, pp. 198-233

Chap 12: Redox reactions, pp. 335-365

Edgar, AE (1973) Experimental Petrology: Basic Principles and Techniques. Clarendon Press, Oxford.

Chap. 4: Experiments at atmospheric pressure, pp. 87-93

Chap. 8: Control of partial pressures of volatile components at high total pressures, pp. 170-189

Lindsley, DH (1991) Oxide Minerals: Petrologic and Magnetic Significance. Mineralogical Society of America, Reviews in Mineralogy, Vol. 25.

Chap 1: BR Frost Introduction to oxygen fugacity and its petrologic importance, pp. 1-9

Chap 11: BJ Wood Oxygen barometery of spinel peridotites, pp. 417-431

Luth, RW (1993) Experiments at High Pressure and Applications to the Earth's Mantle. Mineralogical Association of Canada, Edmonton, Alberta.

Chap 2.5: RW Luth Control of oxidation state, pp. 26-31

MacPherson, GJ (2008) Oxygen in the Solar System. Mineralogical Society of America, Reviews in Mineralogy, Vol. 68.

Chap 19: CDK Herd Basalts as probes of planetary interior redox state, pp. 527-553

Ulmer, GC (1971) Research Techniques for High Pressure and High Temperature. Springer, Berlin.

Chap 2: RH Nafziger, GC Ulmer & E Woermann Gaseous buffering for the control of oxygen fugacity at one atmosphere, pp. 9-41

Chap 3: M Sato Electrochemical measurements and control of oxygen fugacity and other gaseous fugacities with solid electrolyte sensors, pp. 43-99

Ulmer, GC and Barnes, HL (1987) Hydrothermal Experimental Techniques. John Wiley & Sons, New York.

Chap 2: JS Huebner Use of gas mixtures at low pressure to specify oxygen and other fugacities of furnace atmospheres, pp. 20-60

Chap 3: I-M Chou Oxygen buffers and hydrogen sensor techniques at elevated pressures and temperatures, pp. 61-99