Exposed cross-sections of the continental crust : [proceedings of the NATO Advanced Study Institute on Exposed Cross-Sections of the Continental Crust, Killarney, Ontario, Canada, 17-27 September 1988

In the Fall of 1988, 64 geologists and geophysicists from 11 countries met in Killarney, Ontario, on the north shore of Lake Huron to examine evidence that suggests that the continental crust is exposed in cross-section at several key locations on the Earth's surface. The meeting, which was held under NATO auspices as an Advanced Study Institute, was a landmark event in that it was the first time that many of the lead scientists working on these complexes in relative isolation around the world had' ever gathered together to compare results. The present volume is a compendium of the invited lectures given on the principle sections, plus an array of supporting papers on these and other sections as well as on related topics such as crustal emplacement mechanisms, deformation and rheology. Nearly all of the best known sections are represented, including the Ivrea Zone, Calabria, the Kapuskasing Zone, Fiordland and many others. It is our hope that this Volume will serve as a reference for Earth scientists who are trying to understand levels of the crust not normally exposed to view, as well as a point of departure for new research and a teaching aid to new entrants in this relatively new field of study. Front Matter....Pages i-ix The Ivrea Crustal Cross-Section (Northern Italy and Southern Switzerland)....Pages 1-19 The Exposed Crustal Cross Section of Southern Calabria, Italy: Structure and Evolution of a Segment of Hercynian Crust....Pages 21-42 An Exposed Cross-Section of Continental Crust, Doubtful Sound Fiordland, New Zealand; Geophysical & Geological Setting....Pages 43-69 Uplift and Exhumation of Middle and Lower Crustal Rocks in an Extensional Tectonic Setting, Fiordland, New Zealand....Pages 71-101 A Crustal Cross-Section for a Terrain of Superimposed Shortening and Extension: Ruby Mountains-East Humboldt Range Metamorphic Core Complex, Nevada....Pages 103-135 Progress in Tectonic and Petrogenetic Studies in an Exposed Cross-Section of Young (~100 Ma) Continental Crust, Southern Sierra Nevada, California....Pages 137-158 Characteristics of a Continental Margin Magmatic Arc as a Function of Depth: The Skagit-Methow Crustal Section....Pages 159-173 The Evolution of the Kamila Shear Zone, Kohistan, Pakistan....Pages 175-214 Crustal Formation at Depth During Continental Collision....Pages 215-225 A Field Guide to the Kapuskasing Uplift, a Cross Section through the Archean Superior Province....Pages 227-283 Major Thrust Faults and the Vertical Zonation of the Middle to Upper Proterozoic Crust in Central Australia....Pages 285-304 The Late Archean High-Grade Terrain of South India and the Deep Structure of the Dharwar Craton....Pages 305-326 An oblique cross section of Archean continental crust at the northwestern margin of Superior Province, Manitoba, Canada....Pages 327-341 Two Transects Across the Grenville Front, Killarney and Tyson Lake Areas, Ontario....Pages 343-400 Basaltic Composition Xenoliths and the Formation, Modification and Preservation of Lower Crust....Pages 401-420 Average Composition of Lower and Intermediate Continental Crust, Kapuskasing Structural Zone, Ontario....Pages 421-436 Fluid-Rock Interactions in the Ivrea Zone and the Origin of High Lower Crustal Conductivities....Pages 437-452 Electrical Conductivity: The Story of an Elusive Parameter, and of How it Possibly Relates to the Kapuskasing Uplift (Lithoprobe, Canada)....Pages 453-468 Deformation Sequence in the Southeastern Kapuskasing Structural Zone, Ivanhoe Lake, Ontario, Canada....Pages 469-484 The Exhumation of Cross Sections of the Continental Crust: Structure, Kinematics and Rheology....Pages 485-507 The Fluid Crustal Layer and Its Implications for Continental Dynamics....Pages 509-544 Geophysical Interpretation of Astrogravimetric Data in the Ivrea Zone....Pages 545-561 The Nature of the Kapuskasing Structural Zone: Results from the 1984 Seismic Refraction Experiment....Pages 563-586 Exposed Continental Crust: Seismic Results to be Tested....Pages 587-602 The Structure of the Crust and Uppermost Mantle Offshore Britain: Deep Seismic Reflection Profiling and Crustal Cross-Sections....Pages 603-621 Intracrustal Detachment and Wedging Along a Detailed Cross Section in Central Europe....Pages 623-643 Strategy for Exploration of the Buried Continental Crust....Pages 645-651 Exposed Cross Sections of the Continental Crust - Synopsis....Pages 653-662 Proceedings of the NATO Advanced Study Institute, Killarney, Ontario, Canada, September 17-27, 1988