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Title13. Follow-up on the transfrontier Quebec-Ontario Abitibi surficial geology map compilation project: Smooth Rock Falls-Cochrane area (NTS 42H)
AuthorVeillette, J JORCID logo; St-Jacques, G; Roy, M; Paradis, S J; Boivin, R
SourceSummary of field work and other activities 2008; by Baker, C L (ed.); Debicki, E J (ed.); Kelly, R I (ed.); Ayer, J A (ed.); Stott, G M (ed.); Ontario Geological Survey, Open File Report 6226, 2008 p. 13.1-13.8 Open Access logo Open Access
LinksOnline - En ligne (PDF, 80 MB)
Alt SeriesEarth Sciences Sector, Contribution Series 20080403
Documentopen file
Mediapaper; on-line; digital
File formatpdf (Adobe® Reader®)
NTS42H; 32E/04; 32E/05; 32E/12; 32E/13
Lat/Long WENS-82.0000 -79.5000 50.0000 49.0000
Subjectssurficial geology/geomorphology; geochronology; tills; glacial deposits; glacial striations; glaciation; glacial history; remote sensing; ice movement directions; satellite imagery; depositional environment; stratigraphic analyses; structural features; sands; silts; sediments; Pinard Moraine; Quaternary
IllustrationsSRTM imagery; photographs
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010
Released2008 01 01
AbstractField mapping and sampling of glacial and glaciolacustrine sediments undertaken in 2007 in National Topographic System (NTS) 42H and in part of 32E was continued during the summer of 2008. The interpretation of conventional black and white airphotos was supplemented by analysis of Shuttle Radar Topography Mission (SRTM) satellite imagery. In addition to the mapping of surficial geology units emphasis was placed on deciphering the complex ice-flow chronology of the area which is in many ways similar to that of NTS 32D and 32E (located in sectors Abitibi South and Abitibi NW in Quebec, Figure 16.1). Glacial lineament analysis using SRTM images (Farr and Kobrick 2000) proved to be useful to map terrain lineation produced by former ice flows. Examples of cross-cutting relationships between landforms resulting from the Cochrane surges and those formed by earlier ice flows are shown here to illustrate the potential of SRTM imagery to reconstruct the evolution of ice masses through time. Knowledge of this evolution is a basic requirement to develop a rational approach to mineral exploration methods applicable in glaciated terrain. Adequate ground control using methods of assessing ice-flow chronology such as cross-cutting striations on outcrops and glacial transport of erratics from known lithological source areas, is however, required to correctly assess the age relationship of the intersecting lineaments and the sense of movement of the glacier that formed them. Other aspects of the project included dating of sand and fine sand overlain by Cochrane Till by the optical luminescence method to correlate with current Quaternary stratigraphic investigation carried out further north in the

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