Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy and Utilities Board
Originator: Alberta Geological Survey
Originator: Pawlowicz, J.G.
Originator: Fenton, M.M.
Originator: Hickin, A.S.
Originator: Nicoll, T.J.
Originator: Paulen, R.C.
Originator: Plouffe, A.
Originator: Smith, I.R.
Publication Date: 200512
Title: Drift Thickness of Zama Lake Area, Alberta (NTS 84L)
Geospatial Data Presentation Form: map
Series Information:
Series Name: Maps
Issue Identification: MAP 329
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: Scale 1:250000.
Description:
Abstract:
The drift thickness map shows the variation in thickness of unconsolidated sediment lying between the bedrock surface and the present-day land surface, and complements the Drift Thickness of Alberta map (Pawlowicz and Fenton, 1995). Throughout the map area drift covers the bedrock, with the exception of a few outcrops. The drift tends to be thin in the uplands, which generally correspond to elevated bedrock topography, and thick in areas where buried valleys are present. The bedrock topography map of the Zama Lake area shows the location of the major buried valleys (Figure 2; Pawlowicz et al., 2005). Drift is thinnest on the uplands of Rainbow Ridge, Bassett Hill, the Chinchaga Plain and the Rainbow Plain. In the buried valleys the drift thickens markedly. In Township 110, Range 3, west of the 6th Meridian drift thickness exceeds 300 m, filling a township-sized depression in the Zama Valley. The thickest drift in the map area, however, is found in the buried Rainbow Valley south of Bassett Hill in Township 105, Range 4, west of the 6th Meridian. The thick drift clearly shows the course of the Rainbow Valley from southeast to northwest. The land surface shows little evidence of these large drift-filled paleovalleys.
Purpose:
To map the drift thickness of map area NTS 84L at 1:250,000 scale in support of northern Alberta mapping.
Supplemental Information:

The Zama Lake (NTS 84L) bedrock topography and drift thickness maps were completed as an Alberta Geological Survey and Geological Survey of Canada collaborative contribution to Northern Resources Development Project 4450, Shallow Gas and Diamond Opportunities in Northern Alberta and British Columbia 2003-2007, with funding support from the second phase of the Targeted Geoscience Initiative program. The drift thickness map represents the difference between the land surface and the bedrock surface. Petrophysical logs from oil and gas wells were the primary source of information used for constructing the bedrock topography. A suite of the common well logs (gamma, resistivity, spontaneous potential, density, neutron, sonic and caliper) were useful in making the pick for top of bedrock; however, the gamma and resistivity logs proved to be the most useful. In this region the drift typically displays lower gamma values and higher resistivity values than the underlying bedrock. Other sources of data were drill cuttings, water well lithologs and surficial geological mapping that provided information on bedrock outcrop locations and till veneers over shallow bedrock (EUB/AGS Maps 315 and 316, GSC Open Files 4637 and 4754).

Mapping the bedrock surface was difficult in some areas where data were sparse. In many of the wells, log traces are not available for the upper part of the hole. The depth of surface casing set in bedrock provides a limit on the maximum possible drift thickness. Conversely, water wells and gas wells that did not intersect bedrock provide minimum drift thickness values. The drift thickness interpretation was made after completion of the bedrock topography contouring. Bedrock topography contours were initially generated from bedrock surface picks using a computer-contouring program with subsequent modifications to better reflect the geological model. The bedrock topography surface, in a digital grid format, was subtracted from a digital elevation model of the land surface. The resulting grid was then contoured to form an isopach map of the drift.

Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 2003
Ending Date: 2005
Currentness Reference: process date
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -118
North Bounding Coordinate: 59
South Bounding Coordinate: 58
Keywords:
Theme:
Theme Keyword Thesaurus:
Theme Keyword: buried valley
Theme Keyword: drift thickness
Theme Keyword: glacial drift
Theme Keyword: overburden
Theme Keyword: shallow gas
Theme Keyword: thalweg
Place:
Place Keyword Thesaurus:
Place Keyword: 84l
Place Keyword: alberta
Place Keyword: canada
Place Keyword: rainbow lake
Place Keyword: zama lake
Access Constraints: AGS
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 Set Credit: M.C. Price; Base data provided by Spatial Data Warehouse Ltd.
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: 20051107
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