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Field geology of high-grade gneiss terrains Libro electrónico autores: Cees W. Passchier, John Stuart Myers, Alfred Kröner

Tipo de material: Libro en línea Libro en línea Idioma: Inglés Detalles de publicación: New York, New York, United States Springer-Verlag c1990Descripción: ix, 150 páginas ilustraciones 25 centímetrosISBN:
  • 3540530533
  • 0387530533
  • 9783540530534 (Print)
  • 9783642760136 (Online)
Tema(s) en español: Recurso en línea: Formatos físicos adicionales disponibles:
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Although there are numerous publications on the geology of high-grade gneiss terrains, few descriptions exist of how to map and carry out structural analysis in these terrains. Textbooks on structural geology concentrate on technIques appli­ cable to low-grade terrains. Geologists who have no experience of mapping high-grade gneisses are often at a loss as to how to apply techniques to high­ grade rocks that were developed for low to medium grade metamorphic terrains. Any study of deep crustal processes and their development through time should begin with examination of the primary data source - outcrops of high­ grade metamorphic terrains. We feel that the urge to apply advanced techniques of fabric analysis, petrology, geochemistry, isotope geochemistry and age deter­ mination to these rocks often results in brief sampling trips in which there is little, if any analysis of the structural and metamorphic history revealed by outcrop patterns. Many studies of the metamorphic petrology and geochemistry of high-grade gneiss terrains make ineffective use of available field data, often because the authors are unaware of structural complexities and of the ways to recognise and use them. This is unfortunate, because much data can be collected in the field at minimal cost that cannot easily, if at all, be obtained from material in the laboratory. The primary igneous or sedimentary nature of a rock, the relative age of intrusive veins, and the sequence of deformation that they under­ went, can usually best be determined by straightforward observation in the field.

Número de sistema: 56151
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Libros Biblioteca Electrónica Recursos en línea (RE) Acervo General Recurso digital ECO400561513737

Incluye bibliografía e índice: páginas 139-147

1. Introduction.. 2. Mapping in gneiss terrains.. 3. Fabric development in gneiss terrains.. 4. Interpretation of structures and fabrics recognition and interpretation of fabric patterns in outcrop.. 5. Metamorphic history of gneiss terrains.. 6. Geochemistry, isotope geochemistry and geochronology: application to field studies.. 7. Origin and evolution of high-grade gneiss terrains.. 8. Problem section.. 9. References.. Index

Disponible para usuarios de ECOSUR con su clave de acceso

Although there are numerous publications on the geology of high-grade gneiss terrains, few descriptions exist of how to map and carry out structural analysis in these terrains. Textbooks on structural geology concentrate on technIques appli­ cable to low-grade terrains. Geologists who have no experience of mapping high-grade gneisses are often at a loss as to how to apply techniques to high­ grade rocks that were developed for low to medium grade metamorphic terrains. Any study of deep crustal processes and their development through time should begin with examination of the primary data source - outcrops of high­ grade metamorphic terrains. We feel that the urge to apply advanced techniques of fabric analysis, petrology, geochemistry, isotope geochemistry and age deter­ mination to these rocks often results in brief sampling trips in which there is little, if any analysis of the structural and metamorphic history revealed by outcrop patterns. Many studies of the metamorphic petrology and geochemistry of high-grade gneiss terrains make ineffective use of available field data, often because the authors are unaware of structural complexities and of the ways to recognise and use them. This is unfortunate, because much data can be collected in the field at minimal cost that cannot easily, if at all, be obtained from material in the laboratory. The primary igneous or sedimentary nature of a rock, the relative age of intrusive veins, and the sequence of deformation that they under­ went, can usually best be determined by straightforward observation in the field. Inglés

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