| Title | Surficial geology, Lefroy Bay (southwest), Nunavut |
| Download | Downloads |
| Author | Campbell, J E; McMartin, I |
| Source | Geological Survey of Canada, Canadian Geoscience Map 152, 2014, 1 sheet, https://doi.org/10.4095/293975 (Open Access) |
| Image |  |
| Year | 2014 |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, glacial deposits and landforms, 1:100,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 16 (NAD83) |
| Media | on-line; digital |
| Related | NRCan photo(s) in this
publication |
| File format | readme
|
| File format | pdf; rtf; shp; xml; jpg; JPEG2000; xls |
| Province | Nunavut |
| NTS | 46M/03; 46M/04; 46M/05; 46M/06; 46M/12 |
| Area | Miles Lake; Lefroy Bay; Salt Lake; Saputit Lake; Committee Bay |
| Lat/Long WENS | -88.0000 -87.3167 67.6333 67.0000 |
| Subjects | surficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; glaciofluvial deposits; glaciomarine deposits; organic deposits; alluvial deposits; eolian
deposits; colluvial deposits; marine deposits; ice flow; flow trajectories; moraines; Cenozoic; Quaternary |
| Illustrations | location maps |
| Program | GEM: Geo-mapping for Energy and
Minerals, Multiple Metals - Melville Peninsula (Nunavut) |
| Released | 2014 06 19 |
| Abstract | Diverse Quaternary sediments and depositional environments with notable landforms characterise the map area. Till blankets and till veneers are scattered through the area but are dominant above the
marine limit. Sand and gravel deposits above the marine limit mainly occur in pro-glacial outwash trains, glaciofluvial aprons/deltas and icecontact landforms (eskers, kames) concentrated in valleys. The marine sequence includes, from the limit of
marine incursion to the present-day coastline, thick deposits of deltaic sands and gravels, extensive areas of exposed and gullied clayey silts, marine offlap sands and silts, and sand and gravel littoral sediments. Sand veneers and patches of
wave-washed tills are present below the marine limit. Extensive areas of exposed bedrock occur south of Committee Bay. Multiple ice-flow directions indicate a north to northwest flow that predates the dominant northeast then northward flows. Major
end moraines (part of the Chantrey Moraine System) are present in the map area with divergent ice-flow directions on either side (northeast versus north). Marine limit elevation drops significantly from ~ 240 m a.s.l. north of the moraine
(Giangioppi, M. et al. 2003) to ~170 m a.s.l. in the south map area suggesting a major stillstand at the Chantrey Moraines during deglaciation. |
| Summary | (Plain Language Summary, not published)
The Lefroy Bay (southwest) map (NTS 46-M SW) identifies surficial materials and associated landforms formed by the last glacier ice that covered the area
until about 6000 years ago. The surficial geology is based on aerial photograph interpretation and fieldwork. This work was undertaken to provide new geological knowledge and improve our understanding of the distribution, nature and glacial history
of surficial materials. This contributes to effective mineral exploration and supports informed decision making for resource development and land use. |
| GEOSCAN ID | 293975 |
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