Deep Drilling in Crystalline Bedrock: The Deep Gas Drilling in the Siljan Impact Structure, Sweden and Astroblemes

ISBN-13: 9783642734540 / Angielski / Miękka / 2011 / 364 str.

A. Boden; K. G. Eriksson

Opis

This book presents the results of the Third International Symposium on Observation of the Continental Crust through Drilling held in Mora and Orsa, Sweden, September 7 - 10, 1987. Volume 2 reviews new and general information on geology, geophysics, rock mechanics, geochemistry, drilling techniques and drilling problems in very deep holes of the FRG, USA and the Soviet Union. The proceedings are invaluable for earth scientists as well as for exploiters of geoenergy and other natural resources in the crust. Volume 1 summarizes the results of the Deep Gas Project in the Siljan impact structure, Sweden, including papers dealing with general aspects of astroblemes. It is of interest to all researchers working in the drilling industry and those interested in the problem of "deep gas."

Spis treści

General Papers.- Siljan Drilling Experiment: Participation of the Gas Research Institute.- Preparatory Investigations — an Overview.- The Deep Earth Gas Theory with Respect to the Results from the Gravberg-1 Well.- Major Questions About Deep Continental Structures.- Conclusions — Exploratory Work.- Technical Papers.- Gravberg-1: Well Design and Drilling Preparations.- Scientific Programme of Well Investigations — an Overview.- Drilling of the Gravberg-1 — Review and Operational Problems.- Scientific Papers.- The Gravity Field of the Siljan Ring Structure.- Electrical Conductivity Structure Around the Gravberg Well.- Early Results of the Electric Wireline Logging in the Gravberg-1 Well.- Interpretation of the Seismic Reflectors in the Gravberg-1 Well.- Geochemical Studies, Gravberg-1 Well, Sweden; Integration of Well Site and External Laboratory Analyses.- Analysis of Gases in the Gravberg-1 Well.- Light Hydrocarbons in Drill Cuttings from the Gravberg-1 Borehole.- Trace Elements in Gravberg Drillhole Samples.- Calcite Crack Cements in Granite from the Siljan Ring, Sweden: Stable Isotopic Results.- Fluid Inclusions in Granite from the Siljan Ring Impact Structure and Surrounding Regions.- Low Temperature Alterations in Granitic Rocks from the Siljan Ring Structure, Central Sweden.- Mössbauer Spectroscopic Data of Granitic Rocks from Gravberg-1 Well, Siljan Ring Structure, Central Sweden.- Investigations of Rocks from the Gravberg-1 Well: Petrological and Geochemical Results.- Geochemical Logging in the Siljan Ring.- Capture of Deep Earth Gas in Water-Filled Fractures.- Astroblemes.- Physical Aspects on Cratering and Slumping.- Structural Deformation, Breccia Formation, and Shock Metamorphism in the Basement of Complex Terrestrial Impact Craters: Implications for the Cratering Process.- Possible Impact Structures in Sweden.- The Formation of Large Impact Structures and Constraints on the Nature of Siljan.- Geological Setting of the Siljan Ring Structure.- Deep Crustal Structure in the Vicinity of the Siljan Ring.