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Title: Development of secondary porosity in the Fairholme carbonate complex (southwest Alberta, Canada)
Authors: Vandeginste, Veerle
Swennen, Rudy
Gleeson, SA
Ellam, RM
Osadetz, K
Roure, F #
Issue Date: Apr-2006
Publisher: Elsevier science bv
Series Title: Journal of geochemical exploration vol:89 issue:1-3 pages:394-397
Abstract: Because of their economic importance as hydrocarbon reservoirs, the Upper Devonian dolomitized carbonate reefs in southwest Alberta have been the subject of several studies. Still, there is no consensus on the process of matrix dolomitization and furthermore, the process of vug development is not often addressed. The studied outcrops show features of an early diagenetic matrix-selective dolomitization by a Late Devonian seawater-derived fluid. Seepage reflux dolomitization combined with latent reflux is proposed, which best explains most chemical characteristics. The cements in the vugs are precipitated from warm saline, Sr-87-enriched fluids and testify to thermogenic sulphate reduction based on the presence of sulphur, CO2 and H2S in inclusions, relatively high homogenization temperatures and depleted delta C-13 values, which sets constraints on the timing of vug formation. Secondary porosity may be created by the mixing of formation water with a tectonically and topographically driven fluid and by the dissolution of anhydrite nodules. (C) 2006 Elsevier B.V. All rights reserved.
ISSN: 0375-6742
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Geology
# (joint) last author

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