Alan Boudreau is Professor of Geology at Duke University, North Carolina and an expert on the origins of layered intrusions. He has worked on numerical modeling of crystallization processes such as crystal aging and compaction, and how they give rise to the variety of features observed in these intrusions. He is also interested in the role of igneous fluids in the petrogenesis of platinum-group element (PGE) deposits in layered intrusions, including the understanding of interaction of igneous fluids with liquid-crystal assemblages to produce the observed features.

Texte du rabat

A comprehensive overview of the evidence for fluid-crystal-liquid (hydromagmatic) interactions in layered intrusions, for academic researchers and professional geologists.

Résumé
The role of hydrothermal fluids during the crystallization of layered intrusions and the ore deposits they contain has long been debated. This book, for academic researchers and professional geologists, summarizes the evidence for fluid-crystal-liquid (hydromagmatic) interactions in layered intrusions.

Contenu

Preface; 1. Introduction; 2. Layered intrusions: an overview; 3. Magmatic volatiles and fluids; 4. Geochemistry of the platinum-group elements; 5. Generation and movement of bubbles and volatile fluids in a crystal-liquid mush; 6. Halogens in layered intrusions; 7. Melt and fluid inclusion evidence; 8. Pegmatoids, pipes, and potholes; 9. The effects of volatiles on mineral stability and volatile fluxing; 10. Chromatographic effects; 11. Compaction-driven stratigraphic traps and the formation of Great Dyke-type deposits; 12. Chromitites; 13. Isotopic evidence; 14. Some objections considered; References; Index.