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TitleReconnaissance sub-bottom profiling survey at Lac Opasatica, 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 7984, 2016, 19 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
NTS32D/03; 32D/06
AreaLac Opasatica
Lat/Long WENS -79.5333 -79.2000 48.3500 48.0000
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 a part of reconnaissance sub-bottom acoustic profiling (SAP) survey on Lac Opasatica, Quebec, 19 SAP were collected from the northern bay area and 27 SAP were collected within Baie Lamy on July 15 and 18, 2014, respectively. Good penetration of the sub-bottom was obtained in most of the two profiled areas. Three facies can be identified within the SAP returns that represent lacustrine, glaciolacustrine and mass movement deposits. The profiles collected from Lac Opasatica demonstrate the widespread presence of mass movement deposits within this basin. Baie Lamy is the better location for any follow-up detailed profiling and core collection because of water depths that are generally shallower than the northern bay.
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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