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Abstract
R. Swennen, F. Roure, and J. W. Granath, eds., Deformation, fluid flow, and reservoir appraisal in foreland fold and thrust belts: AAPG Hedberg Series, no. 1, p.
DOI:10.1306/1025698H13124
Causes of Multiple Magnetizations in the Devonian Upper Member, Wabamun Group, Alberta, Canada: Fluid Flow and Diagenesis?
M. T. Cioppa,1 I. S. Al-Aasm,2 D. T. A. Symons,3 K. P. Gillen4
1Department of Earth Sciences, University of Windsor, Windsor, Ontario, Canada
2Department of Earth Sciences, University of Windsor, Windsor, Ontario, Canada
3Department of Earth Sciences, University of Windsor, Windsor, Ontario, Canada
4Vox Terrae International, Calgary, Alberta, Canada
ACKNOWLEDGMENTS
The authors thank Shell Canada Ltd. for permitting the paleomagnetic and geochemical sampling of their core. Julie Clarke and Jeff Lonnee aided in petrologic and geochemical sampling and analysis. Funding was provided by a Natural Sciences and Engineering Research Council grant to D. T. A. Symons and I. S. Al-Aasm. This chapter was improved greatly by the comments of K. Osadetz and P. Robion.
ABSTRACT
Geochemical and petrologic analysis of three wells from the upper Member of the Wabamun Group in the Limestone gas field indicates a complex diagenetic history, including several episodes of dolomitization, silicification, and calcite cementation. Paleomagnetic analysis showed that several 
magnetization
components are present in the reservoir rocks: (1) a high-temperature magnetization of probable Jurassic age (paleopole long. 81
E, lat. 78N) carried by magnetite; (2) at least one dominant reversed-polarity characteristic remanence of Late Jurassic or Tertiary age (paleopoles long. 172E, lat. 78N; long. 139E, lat. 79N) carried by magnetite and pyrrhotite; and (3) a low-temperature and coercivity reversed-polarity magnetization (paleopole long. 235E, lat. 77N) that is either an uplift-induced magnetization or a late chemical remanent magnetization
. The presence of several remagnetization events implies that the Laramide paleomagnetic history of the Cordillera is incompletely understood.
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