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The AAPG/Datapages Combined Publications Database

CSPG Bulletin

Abstract


Journal of the Alberta Society of Petroleum Geologists
Vol. 9 (1961), No. 8. (August), Pages 253-253

Abstracts of Theses: Anhydritization in the Mississippian Souris Valley Beds of the Broadview Area, Saskatchewan

J. G. McCamis

Dolomitization and anhydritization have occurred in the Mississippian Souris Valley Beds of the Broadview area immediately below the Mississippian-Jurassic erosion surface. These secondary changes are expressed in a relatively impermeable zone of dolomite with a high proportion of Previous HitanhydriteNext Hit and some gypsum that ranges in thickness from 8 feet in the south to 123 feet in the north. Evidence for the replacement of dolomite by Previous HitanhydriteNext Hit is manifold: inclusions of dolomite are contained within anhydritic bodies; gypsum-Previous HitanhydriteNext Hit veins cut the dolomite with irregular contacts; and rhombs of dolomite are corroded by Previous HitanhydriteNext Hit. It is contended that, during Watrous Previous HitAnhydriteTop times, ground waters rich first in magnesium and then in calcium sulfate percolated through the uncompacted silts of the Watrous Red Beds and attacked the carbonates of the Souris Valley Beds. Accompanying maps and cross sections illustrate the relationship which exists between the Watrous Red Beds and the anyhydritized zone of the Mississippian immediately below the unconformity.

End_of_Record - Last_Page 253-------

ACKNOWLEDGMENTS AND ASSOCIATED FOOTNOTES

M.Sc. Thesis, University of Saskatchewan, 1958.

Copyright © 2004 by The Society of Canadian Petroleum Geologists. All Rights Reserved.

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