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SPE 056

Catalogue of Selected Regional Gravity and Magnetic Maps of Northern Alberta

Abstract: Steep crystalline-basement faults in the Alberta and Athabasca basins are commonly expressed as potential-field lineaments. A practical tool for identifying brittle basement faults in northern Alberta was created by detailed processing of public-domain gravity and magnetic data to highlight subtle linear features. Lineaments can be gradient zones, alignments of separate local anomalies of various types and shapes, straight breaks or discontinuities in the anomaly pattern, etc.Two fundamentally different types of crystalline-basement structure, formed in different tectonic conditions, are recognized in the cratonic, platformal Alberta Basin:Archean and Early Proterozoic (Hudsonian and older) ductile orogenic structuresMiddle Proterozoic to Recent cratonic onesThe latter are usually brittle, high-angle, block-bounding faults. Brittle cratonic structures sometimes follow the older orogenic ones, but commonly cut across them. Brittle block-bounding faults, far more than ancient ductile basement structures, had a controlling influence on basin evolution. In the search for steep brittle faults in Alberta, many of the largest gravity and, especially, magnetic anomalies are undesirable because they represent the ductile, healed, ancient orogenic basement structures. These undesirable, strong anomalies commonly obscure the desirable subtle features. Steep brittle faults, formed and reactivated at different times after cratonization, are marked by potential-field anomalies that tend to be straight and very subtle. Detection of subtle gravity and magnetic lineaments was the primary purpose of making this atlas.The common subtlety of the desirable, fault-related anomalies necessitates detailed and careful processing of potential-field data, using a wide range of anomaly-enhancement techniques and display parameters. Different processing and display methods reveal different aspects of the anomaly field. Which methods of anomaly enhancement will yield the most geologically meaningful results is often hard to predict in advance. A good practice is to process the data with a multitude of procedures and parameters. Such extensive experimentation, coupled with prior experience, helps to reveal many anomalies of practical interest.The most geologically meaningful maps, which best highlight subtle potential-field lineaments and anomaly fabrics that could be related to faults, were selected for inclusion in this compilation. This atlas contains 17 gravity and 17 magnetic maps. Each map is accompanied by a text annotation, explaining the processing methods employed and suggesting practical uses of these maps for geological interpetation. Place Keywords 73m 74d 74e 74l 74m 83m 83n 83o 83p 84a 84b 84c 84d 84e 84f 84g 84h 84i 84j 84k 84l 84m 84n 84o 84p alberta canada northern alberta Theme Keywords catalogues digital data fault geology gravity gravity map magnetic magnetic map

Lyatsky, H.V.  Pana, D.I.  2003-08-01

SPE 054

An Investigation of Geological Applications of Archival Lightning Strike Data in the Province of Alberta (North of Latitude 54° North)

Lightning detection instruments were initially deployed to protect aerospace launch vehicles and solid-state electronics. [...]because of the large area involved in the study, interpretation of possible lightning strike linears was focused on the ... Show Abstract

Robertson, K.  2003-11-01

SPE 006

Athabasca Oil Sands Data McMurray/Wabiskaw Oil Sands Deposit - Electronic Data

Athabasca Oil Sands Data McMurray/Wabiskaw Oil Sands Deposit - Electronic Data The database is implemented on a VAX station 4000 using INGRES, a commercially available database management system. The data that accompany this report are one of the ... Show Abstract

Wynne, D.A.  Attalla, M.  Berezniuk, T.  Brulotte, M.  Cotterill, D.K.  Strobl, R.  Wightman, D.  2002-01-01

SPE 071

Preliminary Release of Geochemical, Mineralogical and Kimberlite Indicator Mineral Electron Microprobe Data from Silts, Heavy Mineral Concentrates and Waters from a National Geochemical Reconnaissance Stream Sediment and Water Survey

Preliminary Release of Geochemical, Mineralogical and Kimberlite Indicator Mineral Electron Microprobe Data from Silts, Heavy Mineral Concentrates and Waters from a National Geochemical Reconnaissance Stream Sediment and Water Survey A regional ... Show Abstract

McCurdy, M.W.  Prior, G.J.  Friske, P.W.B.  McNeil, R.J.  Weiss, J.A.  Day, S.J.A.  2004-08-01

SPE 066

Stream Sediment and Water Survey in the Buffalo Head Hills Area, Northern Alberta (parts of 84B, 84C, 84F and 84G) Including Analytical, Mineralogical and Kimberlite Indicator Mineral Data from Silts, Heavy Mineral Concentrates & Waters

Stream Sediment and Water Survey in the Buffalo Head Hills Area, Northern Alberta (parts of 84B, 84C, 84F and 84G) Including Analytical, Mineralogical and Kimberlite Indicator Mineral Data from Silts, Heavy Mineral Concentrates & Waters Place ... Show Abstract

Friske, P.W.B.  Prior, G.J.  McNeil, R.J.  McCurdy, M.W.  Day, S.J.A.  2003-06-01

GEO 2002-15

Structural Control of Lead-Zinc Mineralization In Carbonate Sequences of Northern Alberta: A Contribution to the Carbonate-Hosted Pb-Zn (MVT) Targeted Geoscience Initiative

Field investigations of the Devonian carbonate stratigraphy and deformation pattern in the Interior Plains of northern Alberta, corroborated with existing data on MVT deposits and prospects in the Rocky Mountains fold-and-thrust belt and on the Pine ... Show Abstract

Pana, D.I.  2003-08-01

GEO 2002-20

Metallogenic Considerations for Devonian Carbonates in the Fort McMurray and Fort Vermilion Areas, Alberta: A Contribution to the Carbonate-Hosted Pb-Zn (MVT) Targeted Geoscience Initiative

Field observations confirmed that the investigated areas are part of the Alberta Basin basinal fluids discharge system inferred to have economic potential for metallic minerals accumulation. Updip, bedding-parallel fluid migration through the ... Show Abstract

Eccles, D.R.  Pana, D.I.  2003-08-01

GEO 2003-02

Carbonate-Hosted Pb-Zn (MVT) in Northeastern Alberta - 2002 Core Program: A Contribution to the Carbonate-Hosted Pb-Zn (MVT) Targeted Geoscience Initiative

A short, faulted and brecciated, intersection was encountered in one well, but no thicker intervals displaying classic MVT features, such as collapse breccia with hydrothermal dolomite, were found. Small amounts of pyrite were common, almost ... Show Abstract

Rice, R.J.  Zerbe, T.  2003-12-01

GEO 2003-37

Radiogenic Isotope Geochemistry of Kimberlitic Rocks in Northern Alberta: Constraints for Source of Magmatism and Emplacement Age

Radiogenic Isotope Geochemistry of Kimberlitic Rocks in Northern Alberta: Constraints for Source of Magmatism and Emplacement Age Kimberlitic rocks from the K4 and K6, and Legend, Phoenix and Kendu pipes from the Buffalo Head Hills and Birch ... Show Abstract

Eccles, D.R.  Heaman, L.M.  Creaser, R.A.  2003-11-01

GEO 2000-04

Quaternary Geology Northern Alberta: Information Sources and Implications for Diamond Exploration

Quaternary Geology Northern Alberta: Information Sources and Implications for Diamond Exploration Information is provided on the physiography, bedrock topography, drift thickness, Quaternary stratigraphy, surficial geology, features which differs ... Show Abstract

Fenton, M.M.  Pawlowicz, J.G.  2000-09-01