1887

Abstract

Summary

The soft Champlain Sea sediments of the Ottawa Valley, Canada are susceptible to earthquake-triggered ground failure and contribute to significant amplification of earthquake shaking. We investigate the geophysical and geotechnical properties of Champlain Sea sediments and the underlying shape of the bedrock basin. The objective of the multidisciplinary approach is to characterize the geophysical and geotechnical signatures of high sensitivity clay and silt, and to improve understanding of how these sediments respond to earthquake shaking. Geophysical techniques employed in this study include microtremor recordings, high-resolution seismic profiling, electrical resistivity imaging, and downhole geophysical logging. Geophysical and geotechnical data suggest a bedrock basin up to 98 m deep with a soft sediment fill that exhibits localized evidence of leaching and high sensitivity. Results are consistent with the presence of retrogressive landslide scars in the Breckenridge study area.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201702121
2017-09-03
2024-03-28
Loading full text...

Full text loading...

References

  1. Brooks, G.R.
    [2013] A massive sensitive clay landslide, Quyon Valley, southwestern Quebec, Canada, and evidence for a paleoearthquake triggering mechanism. Quaternary Research, 80, 425–434.
    [Google Scholar]
  2. Brooks, G.R., Medioli, B.E., Aylsworth, J.M. and Lawrence, D.E.
    [2013] A compilation of radiocarbon dates relating to the age of sensitive clay landslides in the Ottawa Valley, Ontario-Québec. Geological Survey of Canada, Open File 7432.
    [Google Scholar]
  3. Crow, H., Alpay, S., Hinton, M., Knight, R., Oldenborger, G., Percival, J.P., Pugin, A.J.-M. and Pelchat, P.
    [2017] Geophysical, geotechnical, geochemical, and mineralogical datasets collected in Champlain Sea sediments in the Municipality of Pontiac, Québec. Geological Survey of Canada, Open File 7881.
    [Google Scholar]
  4. Lundstrom, K., Larsson, R. and Dahlin, T.
    [2009] Mapping of quick clay formations using geotechnical and geophysical methods. Landslides, 6, 1–15.
    [Google Scholar]
  5. Solberg, I.-L., Long, M., Baranwal, V.C., Gylland, A.S. and Rønning, J.S.
    [2016] Geophysical and geotechnical studies of geology and sediment properties at a quick-clay landslide site at Esp, Trondheim, Norway. Engineering Geology, 208, 214–230.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201702121
Loading
/content/papers/10.3997/2214-4609.201702121
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error