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