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Permanent link (DOI): https://doi.org/10.7939/R37X4V

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Characterization of late-diagenetic calcites of the Devonian Southesk-Cairn Carbonate Complex (Alberta Basin): constraints from petrography, stable and radiogenic isotopes, fluid inclusion and organic matter maturity data Open Access

Descriptions

Other title
Subject/Keyword
Solid bitumen
Diagenesis
Geochemistry
Alberta Basin
Fluid inclusions
Carbonate reservoirs
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Aubet, Natalie
Supervisor and department
Richards, Jeremy (Earth and Atmospheric Sciences)
Machel, Hans G. (Earth and Atmospheric Sciences)
Examining committee member and department
Schmitt, Douglas (Physics)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2009-11-17T22:10:01Z
Graduation date
2010-06
Degree
Master of Science
Degree level
Master's
Abstract
The Alberta Basin has been the subject of various diagenetic studies but the precise understanding of the processes behind deep burial cementation remains unclear. This study investigates late-diagenetic calcites from the Devonian Southesk-Cairn Carbonate Complex with the purpose of constraining temperature, relative timing and chemistry of the paleo-fluids involved during calcite precipitation. Two types of late-diagenetic calcites were petrographically and geochemically characterized. Whereas calcite-I resulted from thermochemical sulfate reduction, calcite-II precipitated with no or little oxidized organic carbon present. As shown by the Sr isotopic signatures, some reservoirs were exposed to radiogenic Sr-bearing fluids. A slight trend of increasing fluid inclusion homogenization temperatures with depth is only seen in calcite-I, and bitumen reflectance also increases with depth following a normal burial gradient. These results, however, are not conclusive to interpret the influence of tectonically-driven fluids during deep burial.
Language
English
DOI
doi:10.7939/R37X4V
Rights
License granted by Natalie Aubet (aubet@ualberta.ca) on 2009-11-13T18:46:04Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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