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TitleReconnaissance sub-bottom profiling survey at Lac Dufresnoy, Quebec
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBrooks, G RORCID logo
SourceGeological Survey of Canada, Open File 7990, 2016, 15 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedFor all publications in this group, see the following publications
File formatreadme
File formatpdf; bmp; rtf
AreaLac Dufresnoy
Lat/Long WENS -79.5000 -79.0000 48.5000 48.2500
Subjectssedimentology; surficial geology/geomorphology; lakes; lake sediments; lake sediment geochemistry; lake sediment thickness; lacustrine deposits; lacustrine environments; glaciolacustrine deposits; sediment transport
Illustrationslocation maps; profiles; tables
ProgramPublic Safety Geoscience Western Canada Geohazards Project
Released2016 01 12
AbstractAs part of a reconnaissance sub-bottom acoustic profiling (SAP) survey, twenty-two and one SAP were collected from lakes Dufresnoy and Lac Petit Dufresnoy, Quebec, respectively, on July 19, 2014. There is good penetration of the sub-bottom along many of the profiles. Three depositional facies can be identified within the SAP returns that represent lacustrine, glaciolacustrine and mass movement deposits. In many profiles, multiple occurrences of mass movement deposits can be identified. The profiling reveals that Lac Dufresnoy is a suitable basin for follow-up detailed profiling and core collection to further investigate the mass movement deposit(s).
Summary(Plain Language Summary, not published)
This report is one of eight that are being released concurrently. All contain the results of geophysical surveys of the bed of a selected lakes in the area of Rouyn-Noranada-Kirkland Lake, Quebec-Ontario. The results from some of the lakes show evidence of ancient landslides that occurred in a large glacial lake. These results will be used in a study that is investigating whether the landslides were triggered by an ancient earthquake.

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