Granite Genesis: In Situ Melting and Crustal Evolution

• Κύριοι συγγραφείς: Chen, Guo-Neng (Συγγραφέας), Grapes, Rodney (Συγγραφέας)
• Συγγραφή απο Οργανισμό/Αρχή: SpringerLink (Online service)
• Μορφή: Ηλεκτρονική πηγή Ηλ. βιβλίο
• Γλώσσα: English
• Έκδοση: Dordrecht : Springer Netherlands, 2007.
• Θέματα: Earth sciences.; Geochemistry.; Geology.; Mineralogy.; Geophysics.; Earth Sciences.; Geophysics/Geodesy.

Granitic rocks are a major component of the continental crust and the many and complex problems of their origin that have challenged geologists over some 200 years still are presenting challenges today. Current ideas of granite formation involve lower crustal melting, segregation, ascent (as dykes o...

Πίνακας περιεχομένων:

• Preface
• Acknowledgements
• 1 Introduction
• 1.1 Rock genesis and its relationship to geosystems
• 1.2 Granites, migmatites and granite problems
• 2 Crustal melting: experiments and conditions
• 2.1 Introduction
• 2.2 Mineral melting
• 2.3 Rock melting – experimental evidence
• 2.4 Structure and composition of the crust
• 2.5 Water in the crust
• 2.6 Crustal heat and partial melting
• 3. In-situ melting and intracrustal convection: granite magma layers
• 3.1 Introduction
• 3.2 Crustal melting I: Initial melting and partial melt layer
• 3.3 Crustal melting II: Convection and formation of magma layer
• 3.4 Compositional variation within magma layer
• 3.5 Magma layer, granite layer and granite bodies
• 3.6 MI fluctuation (remelting) and granite sequence
• 3.7 Conclusion
• 4. Geological evidence for in-situ melting origin of granite layers
• 4.1 Migmatite to granite
• 4.2 Contact metamorphism
• 4.3 Xenoliths and mafic enclaves
• 4.4 Granite layer and granite exposures
• 4.5 Fluctuation of MI and downward younging granite sequence
• 5. Differentiation of magma layer: geochemical considerations
• 5.1 Introduction
• 5.2 Compositional variation
• 5.3 Strontium isotopes
• 5.4 Oxygen isotopes
• 5.5 Rare earth elements
• 5.6 Summary
• 6. Mineralisation related to in-situ granite formation
• 6.1 Introduction
• 6.2 Source of ore-forming elements
• 6.3 Formation and evolution of ore-bearing fluid
• 6.4 Types of mineral deposits
• 6.5 Age relationships
• 6.6 Temperature distribution
• 6.7 Formation and distribution of hydrothermal mineral deposits
• 6.8 Mineralised depth horizons
• 6.9 Mineralisation during elevated crustal temperatures
• 6.10 Mineralisation during granite remelting
• 6.11 Patterns of element redistribution and element fields
• 6.12 Summary
• 7. Heat source for crustal magma layers: tectonic models
• 7.1 Introduction
• 7.2 Crustal temperature disturbance related to plate convergence
• 7.3 Subduction and granite formation: western Pacific continental margin
• 7.4 Continental collision and granite formation: Tethys Belt
• 7.5 Concluding statement
• 8. Geological effects of crystallisation of a crustal granite magma layer: SE China
• 8.1 Fault-block basins
• 8.2. Volcanism
• 9. Material and element cycling of the continental crust and summary
• 9.1. Rock cycling of continental material
• 9.2. Element cycling of the continental crust
• 9.3. Overview
• References
• Appendix 1 map of SE China
• Appendix 2 Results of experimental rock melting
• Index .