Granite: From Segregation of Melt to Emplacement Fabrics

1. Front Matter

   Pages i-x

   PDF

2. Melt and Magmas: Properties and Segregation

   1. Front Matter

      Pages 1-1

      PDF

   2. Application of Information Theory to the Formation of Granitic Rocks

      • Nick Petford, John D. Clemens, Jean-Louis Vigneresse

      Pages 3-10

   3. Rheological Properties of Granitic Magmas in Their Crystallization Range

      • Bruno Scaillet, François Holtz, Michel Pichavant

      Pages 11-29

   4. Wetting Angles, Equilibrium Melt Geometry, and the Permeability Threshold of Partially Molten Crustal Protoliths

      • Didier Laporte, Cédric Rapaille, Ariel Provost

      Pages 31-54

   5. Magmatic Fracturing and Small-Scale Melt Segregation during Pluton Emplacement: Evidence from the Adamello Massif (Italy)

      • Barbara E. John, Holger Stünitz

      Pages 55-74

   6. Rheological Aspects of Magma Transport Inferred from Rock Structures

      • Carlos Fernández, Antonio Castro, J. D. De La Rosa, I. Moreno-Ventas

      Pages 75-91

3. Fabrics in Granite

   1. Front Matter

      Pages 93-93

      PDF

   2. Granite is Never Isotropic: An Introduction to AMS Studies of Granitic Rocks

      • Jean Luc Bouchez

      Pages 95-112

   3. Homogeneity of Granite Fabrics at the Metre and Dekametre Scales

      • Philippe Olivier, Michel de Saint Blanquat, Gérard Gleizes, Denis Leblanc

      Pages 113-127

   4. Analogue 3D Simple-Shear Experiments of Magmatic Biotite Subfabrics

      • Laurent Arbaret, Hervé Diot, Jean Luc Bouchez, Pierre Lespinasse, Michel de Saint-Blanquat

      Pages 129-143

   5. 3D Biotite Shape Fabric Experiments under Simple Shear Strain

      • Angel Fernandez, Javier Fernández-Catuxo

      Pages 145-157

   6. Perpendicular Linear Fabrics in Granite: Markers of Combined Simple Shear and Pure Shear Flows?

      • Karel Schulmann, Josef Jezek, Zdenek Venera

      Pages 159-176

   7. Rigid Particles in Simple Shear Flow: Is Their Preferred Orientation Periodic or Steady-State ?

      • Benoît Ildefonse, Laurent Arbaret, Hervé Diot

      Pages 177-185

4. Emplacement of Granite Plutons: Case Studies

   1. Front Matter

      Pages 187-187

      PDF

   2. Syntectonic Granites and the Principle of Effective Stress: A General Solution to the Space Problem?

      • Donald H. W. Hutton

      Pages 189-197

   3. Granite Pluton Geometry and Emplacement Mode Inferred from Combined Fabric and Gravity Data

      • Laurent Améglio, Jean Louis Vigneresse, Jean Luc Bouchez

      Pages 199-214

   4. The Los Pedroches Batholith (Southern Spain): Polyphase Interplay between Shear Zones in Transtension and Setting of Granites

      • Aitor Aranguren, Francisco Jose Larrea, Manuel Carracedo, Julia Cuevas, Jose Maria Tubía

      Pages 215-229

   5. Development of Magmatic to Solid-State Fabrics during Syntectonic Emplacement of the Mono Creek Granite, Sierra Nevada Batholith

      • Michel de Saint Blanquat, Basil Tikoff

      Pages 231-252

   6. Drainage and Emplacement of Magmas along an Inclined Transcurrent Shear Zone: Petrophysical Evidence from a Granite-Charnockite Pluton (Rahama, Nigeria)

      • Eric Ferré, Gérard Gleizes, M. Toufik Djouadi, Jean Luc Bouchez, Francis X. O. Ugodulunwa

      Pages 253-273

viii debate of those earlier days has been beautifully summarized by H. H. Read in his famous "Granite Controversy" (1957). Read's formulation of the controversy occurred at the time when geochemistry was as a new and powerful tool. The new techniques opened era during which emerging an granites were considered mainly from this new viewpoint. Geochemical signatures have shown that mantle and crustal origins for granites were both possible, but the debate on how and why granites are emplaced did not progress much. Meanwhile, structural geology was essentially geometrical and mechanistic. In the early 70's, the structural approach began to widen to include solid state physics and fluid dynamics. Detailed structural maps of granitic bodies were again published, mainly in France, and analysed in terms of magmatic and plastic flow. The senior editor of this volume and his students deserve much of the credit for this new development. Via microstructural and petrofabric studies, they were able to discriminate between strain in the presence of residual melt or in the solid-state, and, by systematically measuring magnetic fabrics (AMS), they have been able to map magmatic foliations and lineations in ever finer detail, using the internal markers within granites coming from different tectonic environments. The traditional debate has been shifted anew. The burning question now seems to be how the necessary, large-scale or local, crustal extension required for granite emplacement can be obtained.

• Batholith
• formation
• geology
• subduction
• structural geology

• Department of Earth Sciences, University of Toulouse, France

  J. L. Bouchez

• Department of Geological Sciences, University of Durham, UK

  D. H. W. Hutton

• Department of Geology, St. Andrews University, UK

  W. E. Stephens

Policies and ethics