Observation of the Continental Crust Through Drilling I: Proceedings of the International Symposium Held in Tarrytown, May 20-25, 1984

ISBN-13: 9783642456039 / Angielski / Miękka / 2012 / 364 str.

C. Barry Raleigh

Opis

Drilling deep into the earth holds a fascination for earth scientists derived in part from the fact that the drill hole is the ultimate test of a hypothesis. When surface exploration methods have been fully uti lized and all the geological inferences drawn about the structure be neath the surface, we must finally drill to sample directly the third dimension of the crust of the earth. The drill is thus the tool of choice of the energy and minerals re sources industry. Because of high cost, drilling has been only sparing ly used for solving fundamental problems in the earth sciences. But now, having used the quite sophisticated methodology of exploration geophysics, the exciting structural detail emerging from seismic re flection profiling in particular has led several nations to begin a major program of scientific drilling to solve some of the major prGb lems in the earth sciences. Hhat is described in this volume are the blueprints for national re search programs in France, the Federal Republic of Germany, Japan and the United States. The Soviet Union has already embarked on a major drilling effort, the results of which are soon to be published. Results, of course, are still few, and this first volume is more concerned with the problems to be solved."

Spis treści

Review of National Drilling Programs.- A U. S. National Continental Scientific Drilling Program.- German Approaches to Continental Deep Drilling.- Programme on the Deep Geology of France.- Deep Drilling Programs in Belgium.- Scientific Continental Drilling Project in Japan and Scientific Goals.- Programme for Deep Drilling in Sweden.- Thermal Regimes.- Characterizing Thermal Energy and Mass Transport in Volcanic Caldera Complexes; The Role of Scientific Drilling.- Models for Volcanic Processes in Long Valley California: Testing by Continental Drilling.- Geochemistry and Mineral Resources.- Continental Scientific Drilling to Investigate Brine Evolution and Fluid Circulation in Active Hydrothermal Systems.- Scientific Drilling to Study the Roots and Margins of Hydrothermal Mineral Systems.- In Situ Borehole Measurements.- Scientific Drilling to Study Physical Properties and the State of Stress in the Earth’s Crust: An Opportunity for Mid-Crustal Measurements Near the San Andreas Fault.- Deep-Borehole Techniques for Continuous Monitoring of Crustal Activity and In-Situ Stress Measurement in Japan.- Advances in Drilling and Logging Technology.- Deep Drilling for Science Contraints/Challenge.- Geoscience Experiments in Boreholes: Instrumentation.- Logging Technology for High-Temperature Geothermal Boreholes.- Use of Geophysical Logs for Quantitative Determination of Fracturing, Alteration, and Lithology in the Upper Oceanic Crust.- Research and Development Activities in Geothermal Drilling, Completion and Logging.- Vertical Electromagnetic Profiling (VEMP).- Recent Results from Scientific drilling.- Results of Deep Drilling in Austria.- Deep Drilling Technology for Hot Crystalline Rock.- Observations in an Active Hydrothermal System Through Deep Drilling: Valles Caldera, New Mexico.- Deep Structures of Continents.- Rationale for a Deep Drill Hole Into’ the Seismically Active Area of the Hohenzollerngraben, Southwestern Germany.- Rationale for Selecting a Site for an Ultra-Deep Dedicated Scientific Drill Hole in the Southern Appalachians.- Discovery of Two Proterozoic Granite-Rhyolite Terranes in the Buried Midcontinental Basement: The Case for Shallow Drill Holes.