Deep Drilling in Crystalline Bedrock -

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Résumé :
Opening Remarks.- Welcoming at the 3rd International Symposium on Observation of the Continental Crust through Drilling, Mora and Orsa, Sweden, September 7-10, 1987.- Opening Speech of the 3rd International Symposium on Observation of the Continental Crust through Drilling, Mora and Orsa, Sweden, September 7-10, 1987 County governor Lilly Hansson.- Drilling for Deep Gas in the Siljan Impact Structure.- Opening Ceremony Remarks.- Continental Scientific Drilling - A Scientific Frontier.- International Review of Deep Drilling Projects.- Experience from Crystalline Rock Drilling and Technology Directions for Effective Ultra-deep Coring and Drilling.- Deep Structure of Early Precambrian Continental Crust (Kola Super-deep Well).- The German Continental Deep Drilling Program, Targets and State of Work.- The Ocean Drilling Program.- DOSECC's Deep Scientific Drilling Project at Cajon Pass, California.- Problems of Ultra Deep Exploration in the Alpine Region of Central Europe.- The Deep Geology of France Programme. The First Three Boreholes in Crystalline Rocks.- The Appalachian Ultradeep Core Hole (ADCOH) Project.- Deep Crustal Drilling, Texas Gulf Coast, United States of America.- Results from Shallow Research Drilling at Inyo Domes, Long Valley Caldera, California, and the Salton Sea Geothermal Field, Salton Trough, California.- Scientific Drilling in Canada - Past and Future.- The Contribution of Drilling to British Deep Geology.- Technical Papers.- Cajon Pass Scientific Drilling Project: Phase I Overview.- The Drilling Concept of the Continental Deep Drilling Program of the Federal Republic of Germany (KTB).- Bit Design for Crystalline Rock.- Coring Tools for Application in Crystalline Rock.- Modern Exploration by Deep Slim Hole Drilling and Wire LineCoring.- Deep Hole Drilling with Wireline Equipment.- Future Development of Ultraslim Hole Drilling Technique and its Place in Deeper Exploration Drilling.- A New High Temperature Stable Drilling Mud Additive for Geological and Deep Drilling Operations.- Formation Microscanner Tool Imaging and Laterolog Resistivity Measurements in Interpretation of Crystalline Terrains.- Comparison of Rotating Times for Deep Wells.- Significance of Material Softening for the Analysis of Deep Borehole Stability.- Scientific Papers.- Project Upper Crust: A Program to Sample the Precambrian Basement of the Midcontinent Region of North America Using Industrial Drill Holes.- Scientific Exploration of an Active Magma-Hydrothermal System in the Valles Caldera, New Mexico, through Drilling.- Initial Results of the Salton Sea Scientific Drilling Project (SSSDP): A Research Borehole in an Active Hydrothermal System in Southern California, U.S.A..- The Swedish Hot-Dry-Rock Project...

Sommaire:
Some Preliminary Achievements.- Geophysical Aspects of Recent Deep Seismic Soundings of the German Crust.- A Pilot Vertical Seismic Profiling Experiment in the Cajon Pass Deep Scientific Drillhole.- The Logging Strategy for the Continental Deep Drilling Programme of the Federal Republic of Germany.- Frictional Sliding and the Crustal Stresses.- General Considerations of the Flow of Gases through the Crust.- New Concepts of Earth Structure and Potential Hydrocarbon Reserves.- Permeability and Paleoporosity in Crystalline Bedrocks of the Central European Basement - Studies of Cathodoluminescence.- Prospects for the Future of Deep Drilling.- Frontiers in Hydrocarbon Exploration.- Why Drill Deep Holes in Precambrian Basement?.- The Future of Scientific Drilling.- Quantifying the Mass-Energy Fluxes Across the Geospheres:The New Challenge for the Earth Sciences....