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TitleSurficial sediments and placer gold on the inner shelf and coast of northeast Newfoundland
AuthorShaw, J; Forbes, D L; Edwardson, K A
SourceGeological Survey of Canada, Bulletin 532, 1999, 104 pages (2 sheets); 1 CD-ROM,
PublisherNatural Resources Canada
MapsPublication contains 2 maps
Map Info.location, survey and sample locations, 1:250,000
Map Info.surficial geology, landforms, lithology, 1:250,000
Mediapaper; CD-ROM; on-line; digital
File formatpdf
ProvinceEastern offshore region; Newfoundland and Labrador
NTS2E; 2F/03; 2F/04; 2F/05; 2F/06; 2F/11; 2F/12; 2F/13; 2F/14; 2L/01; 2L/02; 2L/03; 2L/04; 2L/05; 2L/06; 2L/07; 2L/08; 12H/01; 12H/02; 12H/07; 12H/08; 12H/09; 12H/10; 12H/15; 12H/16; 12I/01; 12I/02; 12I/07; 12I/08
AreaBaie Verte Peninsula; Cape Freels; White Bay; Baie Verte; Halls Bay; Green Bay; Badger Bay; New Bay; Bay of Exploits; Notre Dame Bay
Lat/Long WENS-57.0000 -53.0000 50.5000 49.0000
Subjectsmarine geology; economic geology; geochemistry; geochronology; geophysics; gold; placer deposits; mineral deposits; stratigraphic analyses; glaciation; deglaciation; sea level fluctuations; ice movement directions; landforms; shorelines; shoreline changes; gold geochemistry; coastal environment; depositional environment; coastal studies; modelling; fiords; acoustic surveys; acoustic surveys, marine; seismic surveys; seismic reflection surveys; seismic surveys, marine; side-scan sonar; bathymetry; cores; seismic profiles; geophysical interpretations; lithology; glaciomarine deposits; muds; mineralization; continental shelf; radiocarbon dates; radiometric dates; Quaternary
Illustrationssketch maps; seismic profiles; analyses; photographs; sonargrams
ProgramCanada-Newfoundland Cooperation Agreement on Mineral Development, 1994-1995
Released1999 04 01; 2009 05 29
AbstractThe inner Northeast Newfoundland Shelf and coast were mapped to determine the potential of the region to host marine placer minerals, particularly gold. Five units were mapped: unit 1, bedrock; unit 2, glacial diamicton; unit 3, glaciomarine mud; unit 4, postglacial mud; and unit 5, postglacial sand and gravel. These units occur in five zones defined by depth, as follows: 1) deep, offshore basins contain thick deposits of glaciomarine, gravelly, sandy mud overlain by postglacial mud; 2) in shallower water, these units have been winnowed by currents; 3) above a depth of about 200 m, the seabed has been furrowed and pitted by grounded icebergs; 4) above a depth of 70 m the seabed is highly mobile; 5) the intertidal/supratidal zone is narrow and rocky, except along The Straight Shore. Relative sea level has been falling throughout postglacial time in the west, but in the east it dropped to -20 m about 8.7 ka before rising again. Fiords contain thick deposits of glaciomarine mud, capped by thin, postglacial mud. Shallow, outer-fiord areas are heavily imprinted by iceberg furrows and pits. In zone 4, which has the highest potential to host marine placers, extensive gravel and sand deposits occur on the wide, shallow, inner shelf between Cape Freels and Hamilton Sound, but no gold has been found in samples, likely because of a lack of gold mineralization onshore. Some gold was found at Deer Cove in Baie Verte, although the volume is small and the grades low.