Geochemistry of Sedimentary Ore Deposits

ISBN-13: 9781461394952 / Angielski / Miękka / 2011 / 305 str.

J. B. Maynard

Opis

This book is an outgrowth of my interest in the chemistry of sedimentary rocks. In teaching geochemistry, I realized that the best examples for many chemical processes are drawn from the study of ore deposits. Consequently, we initiated a course at The University of Cincinnati entitled "Sedimentary Ore Deposits," which serves as the final quarter course for both our sedimentary petrology and our ore deposits sequence, and this book is based on that teaching experience. Because of my orientation, the treatment given is perhaps more sedimentological than is usually found in books on ore deposits, but I hope that this proves to be an advantage. It will also be obvious that I have drawn heavily on the ideas and techniques of Robert Garrels. A number of people have helped with the creation of this book. I am especially grateful to my students and colleagues at Cincinnati and The Memorial University of Newfoundland for suffering through preliminary versions in my courses. I particularly thank Bill Jenks, Malcolm Annis, and Dave Strong. For help with field work I thank A. Hallam, R. Hiscott, J. Hudson, R. Kepferle, P. O'Kita, A. Robertson, C. Stone, and R. Stevens. I am also deeply indebted to Bob Stevens for many hours of insightful discussion.

Spis treści

1. Introduction.- 2. Iron.- I. Iron-Formations.- Mineralogy.- Oxides.- Carbonates and sulfides.- Silicates.- Metamorphism.- Supergene Enrichment.- Geochemistry.- Petrography.- Vertical Sequence.- Theories of Origin.- II. Ironstones.- Mineralogy.- Oxides.- Carbonates.- Sulfides.- Silicates.- Geochemistry.- Pyrite-siderite.- Chamosite-glauconite.- Oxides and hyroxides.- Stable isotopes.- Petrography.- Vertical Sequence.- Theories of Origin.- 3. Copper and Silver.- Mineralogy.- Geochemistry.- Supergene Enrichment.- Examples.- White Pine, Michigan.- Creta, Oklahoma.- The Kupferschiefer.- Central African Copperbelt.- Summary.- 4. Aluminum and Nickel.- I. Aluminum.- Mineralogy.- Geochemistry.- Petrography.- Vertical Sequence.- Theories of Origin.- Summary.- II. Nickel.- Mineralogy.- Geochemistry.- Petrography.- Vertical Sequence.- Theories of Origin.- Summary.- 5. Manganese.- Mineralogy.- Geochemistry.- Petrography.- Vertical Sequence.- Nikopol.- Morocco.- Deposits associated with iron-formations.- Manganese in Modem Sediments.- Mn nodules in modern sediments.- Mn carbonates in modern sediments.- Summary.- 6. Uranium.- Mineralogy.- Geochemistry.- Examples of Types of Deposits.- Early Proterozoic Au-U deposits.- Late Proterozoic unconformity-vein deposits.- Black shale deposits.- Sandstone-hosted deposits.- Calcrete deposits of Australia.- Summary.- 7. Lead and Zinc.- I. Carbonate-Hosted Deposits.- Mississippi Valley-type Deposits.- Alpine Deposits.- Irish Base-Metal Deposits.- Discussion.- II. Clastic-Hosted Deposits.- Sullivan.- McArthur River.- Discussion.- 8. Volcanic-Sedimentary Ores.- I. Deposits of Divergent Plate Boundaries.- Divergent Boundaries: Modern Examples.- Divergent Boundaries: Ancient Examples.- The Red Sea.- II. Deposits of Convergent Plate Boundaries.- Convergent Boundaries: Modern Examples.- Convergent Boundaries: Ancient Examples.- References.- Author Index.- Index of Deposits and Localities.