Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy and Utilities Board
Originator: Alberta Geological Survey
Originator: Lyatsky, H.V.
Originator: Pana, D.
Originator: Grobe, M.
Publication Date: 200510
Title: Basement structure in central and southern Alberta: insights from gravity and magnetic maps
Geospatial Data Presentation Form: atlas
Series Information:
Series Name: Special Report
Issue Identification: SPE 072
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Description:
Abstract:

Identification of brittle faults in the Alberta Basin is critical to hydrocarbon and mineral exploration, as well as to greenhouse-gas geological sequestration studies. Many faults affecting the Phanerozoic sedimentary rocks of this basin are well known to be basement controlled. Potential-field data can give valuable information on the location of faults in the basement. These faults may have propagated into the overlying sedimentary rocks and influenced fluid flow and distribution of hydrocarbon traps and mineralization zones, as well as salt dissolution and carbonate alteration. The present study used regional, publicly available gravity and aeromagnetic data compiled and levelled by the Geological Survey of Canada to identify geophysical lineaments that may represent basement faults in the central and southern Alberta (south of 56 degress N latitude).

The crystalline basement in central and southern Alberta includes Archean and Early Proterozoic ductile orogenic structures and Middle Proterozoic to Recent cratonic structures.

Although anomaly signatures of the ancient ductile basement structures predominate in potential-field maps, it is brittle, high-angle block-bounding faults that had the most influence on the evolution of the Alberta Basin. These steep, brittle basement faults are much more subtle and less easily detectable; many of them are sub-resolution seismically. Gravity and magnetic data processing and anomaly-enhancement experiments revealed many gravity and magnetic lineaments defined by gradient zones, alignments of separate local anomalies of various types and shapes, aligned breaks or discontinuities in the anomaly pattern, etc. Such lineaments are commonly associated with brittle basement faults.

The results of gravity and magnetic data processing are provided here as a catalogue of maps with inferred lineaments, as well as geographically referenced geotiff files (potential-field maps) and DXF files (lineament maps).

Purpose:
Identification of brittle faults in the Alberta Basin is critical to hydrocarbon and mineral exploration, as well as to greenhouse-gas geological sequestration studies.
Supplemental Information: In English
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 200408
Ending Date: 200508
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -110
North Bounding Coordinate: 56
South Bounding Coordinate: 49
Keywords:
Theme:
Theme Keyword Thesaurus:
Theme Keyword: basement
Theme Keyword: fault
Theme Keyword: geophysical study
Theme Keyword: gravity field
Theme Keyword: magnetic field
Place:
Place Keyword Thesaurus:
Place Keyword: alberta
Place Keyword: alberta plains
Place Keyword: canada
Place Keyword: south central alberta
Access Constraints: Public
Use Constraints: Credit to originator/source required. Commercial reproduction not allowed.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Communications Advisor
Contact Position: Communications Advisor
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 Quality Information:
Logical Consistency Report: WARNING - not available
Completeness Report: WARNING - not available
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: 20050919
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Communications Advisor
Contact Position: Communications Advisor
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