Identification_Information: Citation: Citation_Information: Originator: Plouffe, A. Originator: Paulen, R.C. Originator: Smith, I.R. Publication_Date: 2006 Title: Tinahtea Creek Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open File Issue_Identification: 5070 Publication_Information: Publication_Place: Ottawa, Ontario Publisher: Geological Survey of Canada, Natural Resources Canada Other_Citation_Details: Recommended citation: Plouffe, A., Paulen, R.C., and Smith, I.R. 2006: Surficial geology, Tinahtea Creek, Alberta; Geological Survey of Canada, Open File 5070; Alberta Energy and Utilities Board, Alberta Geological Survey, Map 395, scale 1:100 000. Online_Linkage: Description: Abstract: The Tinahtea Creek map area is located in northwest Alberta adjacent to British Columbia to the west and to the Northwest Territories to the north. The region is generally flat with an average elevation of approximately 560 m above sea level (asl) with the exception of Bootis Hill which reaches an elevation of 780 m asl. The entire map area is part of the Fort Nelson Lowland physiographic region. The region dominantly drains to the west through the Petitot River. Till comes to surface in limited places: Bootis Hill and the northwest and north central sector of the map area. The till contains a low clast content (less than 5 % in most samples) with a matrix varying from 7 to 25% sand, 30 to 60% silt, and 5 to 15% clay resulting from the reworking of the shale bedrock and unconsolidated sediments. Most of the clasts present in till consist of granitic lithologies derived from the Shield with small amount of Paleozoic limestone derived from the northeast. Clasts of the local bedrock (poorly indurated and flat-lying Cretaceous Shaftesbury shale) are rare to absent in the till. Glaciofluvial sand and gravel deposits are found in small amount east of Bootis Hill and northwest of Bistcho Lake where they occur as glaciofluvial terraces. Ice-contact deposits are present in the northwest sector of the map area, including one esker north of Lake May. A glacial lake sediment veneer has been identified in the field in only one location northeast of Bootis Hill. Lacustrine sediments are present at the periphery of several lakes including Bistcho Lake. These sediments were deposited at a time when the lake levels were slightly higher than present. Organic deposits, dominantly occurring in the form of bogs, is the most areally extensive surficial unit of the map area. The presence of collapse scars and peat plateaus attest of the presence of discontinuous permafrost within the organic deposits. During the Late Wisconsinan glaciation, ice derived from the Keewatin Sector of the Laurentide Ice Sheet advanced to the west to southwest over most of the area. The ice front configuration during ice retreat can be reconstructed from the position of abundant minor and major moraines dominantly found in the periphery of Bootis Hill and in the northwest part of the map area. In addition, lateral and direct overflow meltwater channels, incised in glacial sediments, provide some indication of the pattern of ice retreat. From the interpretation of these landforms, it is thought that most of the region was deglaciated by ice flowing to the west and southwest, except in the northwest sector where ice was flowing to the south. No bedrock exposure was discovered within the map area during the field investigation, including the Petitot River valley where the river is flowing on till. One till sample collected approximately 10 km west of Creighton Lake contains high Pb and Zn levels (Plouffe et al. 2006) derived from an unknown source. REFERENCE: Plouffe, A., Paulen, R. C. and Smith, I. R. 2006: Indicator mineral content and geochemistry of glacial sediments from northwest Alberta (NTS 84L, M): new opportunities for mineral exploration; Ottawa, Geological Survey of Canada, Open File 5121, Alberta Energy and Utilities Board, Special Report 77, CD-ROM. Purpose: Supplemental_Information: Data set is in English. Map is published in conjunction with the following organizations: Alberta Energy and Utilities Board, Alberta Geological Survey, Map 395 Magnetic declination stated in degrees and minutes. Annual change stated in minutes. Magnetic declination at NW corner of map: 22°25'E, changing 24.7'W annually. Magnetic declination at SW corner of map: 22°8'E, changing 23.8'W annually. Magnetic declination at NE corner of map: 22°2'E, changing 24.7'W annually. Magnetic declination at SE corner of map: 21°45'E, changing 23.9'W annually. Magnetic declination at center of map: 22°5'E, changing 24.3'W annually. Number of base data sets used: 1 Base data set 1: Source is NTDB, ID is 84 M, scale 1:250000 Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Range_of_Dates/Times: Beginning_Date: 2004 Ending_Date: 2005 Currentness_Reference: Field work years are 2004. Compilation years are 2005. Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -120 East_Bounding_Coordinate: -119 North_Bounding_Coordinate: 60 South_Bounding_Coordinate: 59.500 Data_Set_G-Polygon: Data_Set_G-Polygon_Outer_G-Ring: G-Ring_Point: G-Ring_Latitude: 60.0000 G-Ring_Longitude: -119.6805 G-Ring_Point: G-Ring_Latitude: 60.0000 G-Ring_Longitude: -120.0000 G-Ring_Point: G-Ring_Latitude: 59.5000 G-Ring_Longitude: -120.0000 G-Ring_Point: G-Ring_Latitude: 59.5000 G-Ring_Longitude: -119.0000 G-Ring_Point: G-Ring_Latitude: 59.8578 G-Ring_Longitude: -119.0000 G-Ring_Point: G-Ring_Latitude: 60.0000 G-Ring_Longitude: -119.0000 G-Ring_Point: G-Ring_Latitude: 60.0000 G-Ring_Longitude: -119.6805 Keywords: Theme: Theme_Keyword: geoscientificInformation Theme_Keyword: Geological and geophysical Theme_Keyword: Surficial geology Theme_Keyword_Thesaurus: None Place: Place_Keyword: Thinahtea Creek Place_Keyword: Petitot River Place_Keyword: Kakisa River Place_Keyword: Lake May Place_Keyword: Dickins Lake Place_Keyword: Bootis Hill Place_Keyword: Creighton Lake Place_Keyword: Bistcho Lake Place_Keyword: Alberta Place_Keyword_Thesaurus: None Access_Constraints: None Use_Constraints: Her Majesty the Queen in Right of Canada 2006 For more information, please contact the Copyright Officer at the following address: ESS Copyright Officer Business Development Office Earth Sciences Sector 615 Booth St., Ottawa, Ontario K1A 0E9 Sa Majesté la Reine du chef du Canada 2006 Pour plus d'information, prière de communiquer avec le responsable du droit d'auteur à l'adresse suivante : Responsable du droit d'auteur du SST Bureau d'expansion des affaires Secteur des sciences de la Terre 615, rue Booth Ottawa (Ontario) K1A 0E9 Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Alain Plouffe Contact_Organization: Natural Resources Canada Contact_Address: Address_Type: Physical Address: 601 Booth Street City: Ottawa State_or_Province: Ontario Postal_Code: K1A 0E8 Country: Canada Contact_Voice_Telephone: 613-995-4390 Contact_Facsimile_Telephone: 613-992-0190 Contact_Electronic_Mail_Address: aplouffe@NRCan.gc.ca Data_Set_Credit: Affiliated with NR4450, Shallow Gas and Diamond Opportunities in northern Alberta and British Columbia. Digital cartography by Dohar, J.L. 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