Magma Redox Geochemistry. Группа авторов

      

      Table of Contents

      1  Cover

      2  Series Page

      3  Title Page

      4  Copyright Page

      5  List of Contributors

      6  Preface

      7  1 Redox Equilibria 1.1. GENERAL ASPECTS AND RATIONALE 1.2. OXYGEN FUGACITY: THE CENTRALITY OF AN ELUSIVE PARAMETER 1.3. CONCLUDING REMARKS AND PERSPECTIVES ACKNOWLEDGMENTS REFERENCES

      8  Part I: Redox from the Earth’s Accretion to Global Geodynamics 2 Redox Processes Before, During, and After Earth’s Accretion Affecting the Deep Carbon Cycle 2.1. THE REDOX STATE OF PLANETARY INTERIORS AND THE SPECIATION OF CARBON IN THE EARTH 2.2. OXIDATION STATE OF EARTH’S BUILDING BLOCKS AND EARLY DIFFERENTIATION 2.3. MANTLE OXIDATION STATE OVER TIME AND ITS EFFECT ON THE C–O–H VOLATILE SPECIATION 2.4. THE MANTLE GREAT OXIDATION EVENT: FACT OR ARTEFACT? ACKNOWLEDGMENTS REFERENCES 3 Oxygen Fugacity Across Tectonic Settings 3.1. INTRODUCTION 3.2. SAMPLE SELECTION, METHODOLOGY, AND DESIGN OF THIS STUDY 3.3. RESULTS 3.4. DISCUSSION 3.5. CONCLUSIONS AND FUTURE DIRECTIONS ACKNOWLEDGMENTS METHODS APPENDIX REFERENCES 4 Redox Variables and Mechanisms in Subduction Magmatism and Volcanism 4.1. INTRODUCTION 4.2. REDOX VARIABLES 4.3. MECHANISMS 4.4. DISCUSSION ACKNOWLEDGMENTS REFERENCES 5 Redox Melting in the Mantle 5.1. INTRODUCTION 5.2. MANTLE MELTING WITH VOLATILE COMPONENTS 5.3. REDOX MELTING 5.4. COMPOSITIONS OF MELTS FORMED BY REDOX MELTING 5.5. THE OXIDATION STATE IN THE MANTLE LITHOSPHERE, ASTHENOSPHERE, AND SUBDUCTION ZONES 5.6. DISCUSSION 5.7. CLOSING COMMENTS ACKNOWLEDGMENTS REFERENCES

      9  Part II: Redox at Work: From Magma Sources to Volcanic Phenomena 6 Ionic Syntax and Equilibrium Approach to Redox Exchanges in Melts: Basic Concepts and the Case of Iron and Sulfur in Degassing Magmas 6.1. INTRODUCTION 6.2. IONIC SYNTAX, SPECIATION STATE AND THE MELT/GLASS NETWORK: STATE OF THE ART AND CONCEPTUAL FRAMEWORK 6.3. REDOX EVOLUTION AND MAGMATIC DEGASSING 6.4. DISCUSSION 6.5. CONCLUSIONS CODE AVAILABILITY ACKNOWLEDGMENTS REFERENCES 7 The Petrological Consequences of the Estimated Oxidation State of Primitive MORB Glass 7.1. INTRODUCTION 7.2. MODELING METHODS AND SAMPLE SELECTION 7.3. RESULTS 7.4. SUMMARY AND PROSPECTS ACKNOWLEDGMENTS REFERENCES 8 Oxygen Content, Oxygen Fugacity, the Oxidation State of Iron, and Mid‐Ocean Ridge Basalts 8.1. OXYGEN CONTENT, OXYGEN FUGACITY, AND THE OXIDATION STATE OF IRON 8.2. MID‐OCEAN RIDGE BASALTS ACKNOWLEDGMENTS REFERENCES 9 Chromium Redox Systematics in Basaltic Liquids and Olivine 9.1.