Fracture mapping in clays, using gas geochemistry : Background, design of a mobile laboratory and surveys in England and Italy
Integrated soil gas analyses for helium, radon, carbon dioxide and oxygen allow the accurate interpretation of soil gas signatures as indicators of underlying structure, due to large variations over faults and fractures. Structures such as these provide channelways for fluid movement in the upper crust. A mobile gas geochemistry laboratory for the analysis of soil gases was constructed and surveys were carried out at sites in England and Italy. At the Down Ampney site, Gloucestershire, gas was injected into a fault plane, and recorded some hours later at the surface. Refinement of this experiment would allow a full characterisation of permeable pathways at a site. The soil gas technique is shown to be a viable independent site investigation method for the study of fracturing and groundwater movement around potential waste repository sites.
Bibliographic Reference: EUR 13150 EN (1991) 150 pp., FS, ECU 12.50
ISBN: ISBN 92-826-2222-3
Record Number: 199110293 / Last updated on: 1994-12-02
Original language: en
Available languages: en