Language selection

Government of Canada / Gouvernement du Canada

Search

Microstructure of billings shale and biochemical alteration products, Ottawa, Canada

From National Research Council Canada

Download
  1. (PDF, 3.6 MiB)
AuthorSearch for: ; Search for: 1; Search for:
Affiliation
  1. National Research Council of Canada
FormatText, Article
Subjectshale
Abstract
A microstructural analysis has been made of altered and unaltered black shale from a site where foundation heave has occurred. Jarosite framboids composed of very small interlocking crystals, much larger crystals of gypsum and microorganisms are described in the altered shale. The relative roles of jarosite, gypsum, and other hydrated sulphates in the generation of heave forces is not fully understood. If jarosite is responsible, most black shales have a heave potential; if gypsum is responsible only black shales which contain carbonate need be of concern. Recognition of fungi and other microbes suggests a more complex biogeochemical cycle than previously supposed; the use of microorganisms as a method of controlling heave warrants more investigation.
Publication date
In
  • Canadian Geotechnical Journal 11, no. 4 (November 1974): 482–489.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-RP-625
NRC numberNRCC 14422
NRC-IRC-2747
NPARC number20374813
Export citationExport as RIS
Report a correctionReport a correction (opens in a new tab)
Record identifier34246159-6916-4583-a03d-e88f6c0c9139
Record created2012-07-23
Record modified2024-01-11
Date modified: