| Title | Quaternary geology of northern Melville Peninsula, District of Franklin, Northwest Territories: surface deposits, glacial history, environmental geology, and till geochemistry |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Dredge, L A |
| Source | Geological Survey of Canada, Bulletin 484, 1995, 114 pages; 1 CD-ROM, https://doi.org/10.4095/205729  Open Access |
| Links | Canadian Database of Geochemical Surveys, downloadable
files
|
| Links | Banque de données de levés géochimiques du Canada,
fichiers téléchargeables
|
| Year | 1995 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | Publication contains 1 map |
| Map Info. | surficial geology, landforms, lithological, 1:200,000 |
| Media | paper; on-line; digital; CD-ROM |
| Related | This publication is related to Till geochemistry, and
results of lithological, carbonate and textural analyses, northern Melville Peninsula, Nunavut (NTS 47A,B,C,D) |
| Related | This publication is accompanied by Surficial Geology,
Northern Melville Peninsula, District of Franklin, Northwest Territories |
| File format | readme / lisez-moi
|
| File format | pdf |
| Province | Nunavut |
| NTS | 47A/02; 47A/03; 47A/04; 47A/05; 47A/06; 47A/07; 47A/10; 47A/11; 47A/12; 47A/13; 47A/14; 47A/15; 47B/01; 47B/02; 47B/07; 47B/08; 47B/09; 47B/10; 47B/15; 47B/16; 47C/01; 47C/02; 47C/07; 47C/08; 47C/09; 47C/10;
47C/15; 47C/16; 47D/02; 47D/03; 47D/04; 47D/05; 47D/06; 47D/07; 47D/10; 47D/11; 47D/12; 47D/13; 47D/14; 47D/15 |
| Area | Melville Peninsula; Committee Bay; Garry Bay; Baker Bay; Brevoort River; Purfur Cove; Fury and Hecla Strait; Kingora River; Ajaqutalik River; Hall Beach |
| Lat/Long WENS | -86.0000 -81.0000 70.0000 68.0000 |
| Subjects | surficial geology/geomorphology; geochronology; environmental geology; deglaciation; glaciation; glacial deposits; Wisconsinian Glacial Stage; glacial stages; ice sheets; eskers; tills; till
geochemistry; glacial history; landforms; glaciolacustrine deposits; glaciofluvial deposits; marine deposits; dispersal patterns; ice movement directions; radiocarbon dates; radiometric dates; climatic fluctuations; sea level fluctuations;
paleoenvironment; climate; isostasy; ground ice; permafros; gossans; Melville Moraine; Quaternary |
| Illustrations | sketch maps; cross-sections; photographs; aerial photographs; analyses |
| Released | 1995 12 01; 2009 03 02 |
| Abstract | This map and report are the first comprehensive summaries of Quaternary geology and landscape evolution for the area. Melville Peninsula was glaciated from the Foxe Dome (Wisconsin Laurentide Ice). Ice
centred on Foxe Basin flowed westwards across the northern peninsula, while an ice cap occupied the central plateau. Cold-based cap ice preserved preglacial landscapes beneath it, but warm-based ice from the Foxe Basin centre scoured bedrock and left
various glacial landforms, including till veneer and blanket deposits. Till reflects the composition of underlying granitoid rocks, but plumes of carbonate drift were mapped out and document ice streams. The Melville Moraine developed on the western
peninsula in response to changing ice dynamics. It was re-oriented by late ice flow from Baffin Island.
Deglaciation began 9100 BP on the west coast, and about 6900 BP in the east coast, although ice remained for another 700 years near Hall Lake.
The plateau ice cap also persisted after regional ice had disappeared. Abundant ice-marginal meltwater channels indicate downwasting into preglacial valleys.
Following deglaciation, lowland areas were inundated by the sea. Well-controlled sea
level curves illustrate trifold patterns of crustal rebound and emergence. Flights of raised limestone beaches cover the eastern lowland. Postglacial frost shattering of carbonate bedrock produced felsenmeer.
Geochemical elements in till were
mapped and analyzed. Sites beneath the former ice cap reflect the geochemistry of underlying rock, whereas sites beneath Foxe Ice reflect glacial dispersal effects and nearby rock types. High copper, chromium, iron, and nickel are related to Prince
Albert Group. Comparison of elements in till, regolith, and gossans indicates postglacial reactiveness. Ice streams within the Laurentide Ice Sheet, mapped here, indicate that exponential drift prospecting models need major revision. |
| GEOSCAN ID | 205729 |
|
|