Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy and Utilities Board
Originator: Alberta Geological Survey
Originator: Prior, G.J.
Originator: Paulen, R.C.
Originator: Pawlowicz, J.G.
Originator: Fenton, M.M.
Publication Date: 2005
Title:
Kimberlite-Indicator Mineral Till Survey of the Sawn Lake Area (NTS 84B/13), Southern Buffalo Head Hills, Alberta
Geospatial Data Presentation Form: document
Series Information:
Series Name: Geo-Note
Issue Identification: GEO 2005-02
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Description:
Abstract:
The Sawn Lake (NTS 84B/13) map area covers the northwestern part of the Buffalo Head Hills kimberlite field, within which 38 kimberlites have been discovered since 1997. During the 2002 program, 55 till samples (with an average weight of 29 kg) were collected within map area 84B/13, representing an average density of approximately one sample per 16 km2. Heavy mineral concentrates were prepared and picked for kimberlite-indicator minerals, including pyrope, eclogitic garnet, Cr-diopside, olivine, picroilmenite and chromite. In addition, data were obtained on epidote, spinel, apatite, tourmaline, chlorite, rutile, monazite, sulphide and Cr-amphibole.

Within the central and southwestern parts of the Sawn Lake map area, high counts of pyrope, chromite and olivine grains in till occur in a west-southwest-trending zone up to 6 km wide with a minimum length of 15 km. The most anomalous sample returned 418 pyropes, 190 chromites and 137 olivines (picked grain counts). To the south and east of the anomalous pyrope-chromite-olivine trend, the kimberlite-indicator mineral assemblage tends to be dominated by olivine (50% to 100% olivine) with counts of up to 150 picked olivine grains per sample.

The northeastern part of map area 84B/13, which contains a number of kimberlites, including the K252 kimberlite (estimated diamond grade of 55 carats per hundred tonnes), is characterized by tills lacking pyrope and containing relatively modest amounts of olivine +/- chromite +/- Cr-diopside (up to 20 picked olivine grains per sample). A strong pyrope-olivine-chromite anomaly in till was identified east of Sawn Lake, in the north-central part of NTS map area 84B/13 (123 pyrope, 53 olivine and 28 chromite grains recovered from one sample). These grains may indicate the presence of an undiscovered kimberlite nearby. Glacial dispersal is most likely to have been in a southwesterly direction, and there are no known kimberlites northeast of this anomaly.

Purpose:
To release information related to the distribution of kimberlite-indicator minerals in till in an area of known kimberlites in north-central Alberta.
Supplemental Information: In English.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 2002
Ending Date: 2005
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -116
East Bounding Coordinate: -115.5
North Bounding Coordinate: 57
South Bounding Coordinate: 56.75
Keywords:
Theme:
Theme Keyword Thesaurus:
Theme Keyword: geology
Theme Keyword: kimberlite
Theme Keyword: indicator mineral
Theme Keyword: cretaceous
Place:
Place Keyword Thesaurus:
Place Keyword: 84b
Place Keyword: alberta
Place Keyword: buffalo head hills
Place Keyword: canada
Place Keyword: peerless lake
Place Keyword: sawn lake
Access Constraints: Public
Use Constraints: Credit to originator/source required. Commercial reproduiction 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.
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: 20050329
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