- Identification Information:
- Citation:
- Citation Information:
- Originator: Alberta Geological Survey
- Originator: Post, Ryan
- Originator: Alberta Energy and Utilities Board
- Publication Date: 20041225
- Title:
- Stratigraphy and sedimentology of the Athabasca Group in the Net Lake-Maybelle River area, northeastern Alberta
- Geospatial Data Presentation Form: document
- Series Information:
- Series Name: Earth Science Report
- Issue Identification: ESR 2003-01
- Publication Information:
- Publication Place: Edmonton, Alberta, Canada
- Publisher: Alberta Geological Survey
- Description:
- Abstract:
- The stratigraphy and sedimentology of the unconformity-bounded Fair Point, Manitou Falls and Lazenby Lake formations of the Athabasca Group were examined in the Maybelle River-Net Lake area of northeastern Alberta. The lowermost Fair Point Formation is subdivided into two members: the lower and upper Fair Point Formation. The lower Fair Point Formation consists of locally occurring, massive to planar-laminated siltstone units, interbedded with and overlain by matrix- and clast-supported pebble conglomerate and pebbly sandstone. It is conformably overlain by massive and crudely crossbedded, coarse-grained sandstone of the upper Fair Point Formation. Deposition of the Fair Point Formation commenced with shallow lacustrine sedimentation in fault-controlled paleovalleys that were subsequently infilled with locally derived pebble conglomerate. These valleys are overlain by progradational alluvial-plain deposits. The overlying Manitou Falls Formation consists of a basal, crossbedded, medium- to coarse-grained sandstone unit and an upper, ripple-laminated to crossbedded, medium-grained sandstone unit. These are assigned to the Manitou Falls 'c' and 'd' members, respectively. Deposition of the Manitou Falls Formation occurred in relatively low velocity, perennial, braided river system tracts that are traceable across the basin. The uppermost Lazenby Lake Formation is incompletely preserved within the study area. This unit consists of massive and ripple-laminated, pebble-bearing sandstone with convolute bedding. Initial sedimentation of the Fair Point Formation was fault controlled and probably affected by extensional tectonics related to regional thermal activity that postdated the Trans-Hudson Orogeny. The sedimentological characteristics and distribution of the overlying Manitou Falls and Lazenby Lake formations suggest a significant change in the regional tectonic regime. The exact mechanism is unclear, but may be related to late-stage post-Trans-Hudson Orogeny intrusions or the effects of dynamic loading combined with regional, thermally induced subsidence.
- Purpose:
- The main goals of this study were to 1) examine and reassess the regional stratigraphy in these areas, 2) study the regional diagenesis in the area, and 3) place the stratigraphy of the Net Lake-Maybelle River area into the context of a depositional and tectonostratigraphic model for the western Athabasca Basin.
- Supplemental Information: in English
- Time Period of Content:
- Time Period Information:
- Range of Dates/Times:
- Beginning Date: 2002
- Ending Date: 2003
- Currentness Reference: ground condition
- Status:
- Progress: Complete
- Maintenance and Update Frequency: None planned
- Spatial Domain:
- Bounding Coordinates:
- West Bounding Coordinate: -112
- East Bounding Coordinate: -110
- North Bounding Coordinate: 59
- South Bounding Coordinate: 57
- Keywords:
- Theme:
- Theme Keyword Thesaurus:
- Theme Keyword: geology
- Theme Keyword: stratigraphy
- Theme Keyword: sedimentology
- Theme Keyword: athabasca group
- Theme Keyword: uranium
- Place:
- Place Keyword Thesaurus:
- Place Keyword: 74e
- Place Keyword: 74l
- Place Keyword: alberta
- Place Keyword: canada
- Place Keyword: maybelle river
- Place Keyword: net lake
- Access Constraints: Public
- Use Constraints: Credit to originator/source required. Commerical reporduction is not allowed
- Point of Contact:
- Contact Information:
- Contact Organization Primary:
- Contact Organization: Alberta Geological Survey
- Contact Person: Information Specialist
- Contact Position: Information Specialist
- Contact Address:
- Address Type: mailing and physical
- Address: Alberta Energy and Utilities Board
- Address: 4th Floor, Twin Atria Building
- Address: 4999-98 Avenue
- City: Edmonton
- State or Province: Alberta
- Postal Code: T6B 2X3
- Country: Canada
- Contact Voice Telephone: (780) 422-3767
- Contact Facsimile Telephone: (780) 422-1918
- Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
- Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
- Data Set Credit: Dinu Pana, Reg Olson, Barb Kupsch, Brent Collier
- Distribution Information:
- Distributor:
- Contact Information:
- Contact Organization Primary:
- Contact Organization: Alberta Geological Survey
- Contact Person: Information Sales Coordinator
- Contact Position: Information Sales Coordinator
- Contact Address:
- Address Type: mailing and physical
- Address: Alberta Energy and Utilities Board
- Address: 4th Floor, Twin Atria Building
- Address: 4999-98 Avenue
- City: Edmonton
- State or Province: Alberta
- Postal Code: T6B 2X3
- Country: Canada
- Contact Voice Telephone: (780) 422-3767
- Contact Facsimile Telephone: (780) 422-1918
- Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
- Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
- Distribution Liability:
- The Alberta Energy and Utilities Board/Alberta Geological Survey (EUB/AGS) and its employees and contractors make no warranty, guarantee or representation, express or implied, or assume any legal liability regarding the correctness, accuracy, completeness or reliability of this publication. The data are supplied on the understanding that they are for the sole use of the user and will not be redistributed in any form, in whole or in part, to third parties. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the EUB/AGS of any manufacturer's product.
- Metadata Reference Information:
- Metadata Date: 20041216
- Metadata Contact:
- Contact Information:
- Contact Organization Primary:
- Contact Organization: Alberta Geological Survey
- Contact Person: Information Specialist
- Contact Position: Information Specialist
- Contact Address:
- Address Type: mailing and physical
- Address: Alberta Energy and Utilities Board
- Address: 4th Floor, Twin Atria Building
- Address: 4999-98 Avenue
- City: Edmonton
- State or Province: Alberta
- Postal Code: T6B 2X3
- Country: Canada
- Contact Voice Telephone: (780) 422-3767
- Contact Facsimile Telephone: (780) 422-1918
- Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
- Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
- Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
- Metadata Standard Version: FGDC-STD-001-1998
- Metadata Time Convention: local time
- Metadata Access Constraints: none
- Metadata Use Constraints: none