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TitleMineral resource assessment of the Pacific Margin sponge reef areas of interest
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBarrie, J VORCID logo
SourceGeological Survey of Canada, Open File 6915, 2012, 18 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is related to Petroleum resource potential of the Hecate Strait / Queen Charlotte Sound Glass Sponge Reef areas of interest, Pacific Margin of Canada
File formatpdf
ProvinceWestern offshore region
AreaHecate Strait; Queen Charlotte Sound; Pacific Margin
Lat/Long WENS-131.5000 -128.0000 53.5000 51.0000
Subjectsfossil fuels; paleontology; marine geology; economic geology; petroleum resources; petroleum exploration; hydrocarbon potential; source rocks; sedimentary basins; oil; gas; basin analyses; reefs; reef deposits; sea level changes; sea level fluctuations; oceanography; marine organisms; marine environments; marine deposits; aggregates; carbonates; Hecate Basin; Queen Charlotte Basin; Sponges; Cenozoic; Quaternary
Illustrationslocation maps; photographs; tables
ProgramMineral and Energy Resource Assessment (MERA)
Released2012 08 17 (13:00)
AbstractGlass sponge reefs (Hexactinellida, Hexactinosida) off the Pacific Margin of Canada are both geologically and ecologically unique and represent the only global occurrence. In order to provide protection to these unique living cold-water reefs, the Department of Fisheries and Oceans under the Oceans Act have made the four large reefs within the Pacific North Coast Integrated Management Area (PNCIMA) designates for protection as Marine Protected Areas (MPA). The federal government's process for evaluation of a MPA of Interest requires an assessment of the non-renewable resource potential, including marine minerals. Based on the limited knowledge of the offshore British Columbia surficial mineral potential, two settings that may contain mineral placers of gold and titanium include drowned beach and reworked shelf deposits at water depths of 150 m to the modern beach. In addition, extensive areas of construction aggregate and calcium carbonate occur on the shelf. The deep water sponge reefs within the Areas of Interest occur in depths below 150 m within glacial sediments and, therefore, outside the potential setting for mineral placers or industrial minerals. Consequently, the enactment of the sponge reef Marine Protected Areas will not include any surficial mineral deposits of economic potential.

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