Determination of Structural Successions in Migmatites and Gneisses

This is the first book to deal specifically with the procedures used in the analysis of structural relationships and the determination of structural successions in complexly deformed rocks such as migmatites and gneisses. The establishment of structural successions enables: The rigorous control of the dating of specific events in the deformational history by constraining the sites of the dated rocks within the structural succession; The establishment of the time span of orogenic events throughout the structural succession, and the rate of orogenic processes;Their comparison to be used as a basis for correlation between dismembered and separated crustal segments in continental reconstructions;The resolution of the complex relationships between deformed ore bodies and host rocks in high grade terranes, and hence determination of the structural control of ore bodies, an essential part of any successful geological exploration, and a precondition to efficient exploitation.

With its new approach, and the use of practical field examples from various parts of the world, this highly illustrated work will form an invaluable reference resource for postgraduates, lecturers and researchers in the structural and isotope geology of high-grade metamorphic terranes, as well as for exploration and survey geologists working in the field.

Dr Alaric M. Hopgood who holds an Honorary Readership at the University of St Andrews, Scotland, was a Reader in the Department of Geology there until 1995.

Contenu

1. General Characteristics of Migmatites and Migmatite Terranes. 2. Principles of Structural Analysis of Migmatites. 3. Development of Migmatite Structure: Overprinting. 4. The Role of Structures Interposed in the Succession. 5. Fold (Structure) Successions and Deformational Sequences. 6. Correlation. 7. Characteristic Features of Structure Successions. 8. Principles of Succession Determination. 9. Field Approach: Reconnaissance and Detailed Study. 10. Structural Observation. 11. Examples of Complex Structural Relationships. 12. Principles and Practice of Determining Structural Successions Summarized. 13. Analytical Procedure Summarized. 14. Broad Applications. 15. Conclusions. References. Index