Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada.
The Middle-Upper Devonian Kee Scarp Formation at Norman Wells consists of a carbonate platform and an overlying reefal buildup. Episodic increases in the rate of sea-level rise produced multiple cycles of reef growth, with a backstepping character. Reservoir porosity of these reefs is mostly represe...
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University of Windsor
1992
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ftunivwindsor:oai:scholar.uwindsor.ca:etd-4663 2023-05-15T17:46:43+02:00 Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. Azmy, Karem. 1992-01-01T08:00:00Z application/pdf https://scholar.uwindsor.ca/etd/3664 https://scholar.uwindsor.ca/cgi/viewcontent.cgi?article=4663&context=etd eng eng University of Windsor https://scholar.uwindsor.ca/etd/3664 https://scholar.uwindsor.ca/cgi/viewcontent.cgi?article=4663&context=etd info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Electronic Theses and Dissertations Geology info:eu-repo/semantics/masterThesis 1992 ftunivwindsor 2022-01-17T12:15:26Z The Middle-Upper Devonian Kee Scarp Formation at Norman Wells consists of a carbonate platform and an overlying reefal buildup. Episodic increases in the rate of sea-level rise produced multiple cycles of reef growth, with a backstepping character. Reservoir porosity of these reefs is mostly represented by micropores of various types developed during diagenesis by the action of aggrading neomorphism and dissolution. The microporosity was developed as intercrystalline microvoids within the present low-magnesium calcite (LMC) stromatoporoid, algal and matrix components. SEM studies show that microporosity development responded to neomorphism at various rates. Reef margins, grain shoals and lower, middle and upper foreslope facies have the highest and best developed microporosity compared to lagoon, reef flat and tidal flat facies. The micropores in Kee Scarp limestone can be classified into four categories based on their shapes: (1) stepwise rhombic, about 1$\mu$m to 2$\mu$m in diameter; mainly developed in stromatoporoids; (2) intercrystalline rhombic, about 1$\mu$m in diameter; mainly in algal aggregates; (3) microvugs, 4$\mu$m to 10 $\mu$m in diameter; mainly in algal aggregates; (4) microchannels, 12$\mu$m length and 0.5$\mu$m width; in algal aggregates and stromatoporoids. (Abstract shortened by UMI.)Dept. of Geology and Geological Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1992 .A958. Source: Masters Abstracts International, Volume: 31-04, page: 1695. Thesis (M.Sc.)--University of Windsor (Canada), 1992. Master Thesis Northwest Territories University of Windsor, Ontario: Scholarship at UWindsor Canada Kee Scarp ENVELOPE(-126.725,-126.725,65.310,65.310) Leddy ENVELOPE(-117.519,-117.519,56.367,56.367) Norman Wells ENVELOPE(-126.833,-126.833,65.282,65.282) Northwest Territories |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
English |
topic |
Geology |
spellingShingle |
Geology Azmy, Karem. Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. |
topic_facet |
Geology |
description |
The Middle-Upper Devonian Kee Scarp Formation at Norman Wells consists of a carbonate platform and an overlying reefal buildup. Episodic increases in the rate of sea-level rise produced multiple cycles of reef growth, with a backstepping character. Reservoir porosity of these reefs is mostly represented by micropores of various types developed during diagenesis by the action of aggrading neomorphism and dissolution. The microporosity was developed as intercrystalline microvoids within the present low-magnesium calcite (LMC) stromatoporoid, algal and matrix components. SEM studies show that microporosity development responded to neomorphism at various rates. Reef margins, grain shoals and lower, middle and upper foreslope facies have the highest and best developed microporosity compared to lagoon, reef flat and tidal flat facies. The micropores in Kee Scarp limestone can be classified into four categories based on their shapes: (1) stepwise rhombic, about 1$\mu$m to 2$\mu$m in diameter; mainly developed in stromatoporoids; (2) intercrystalline rhombic, about 1$\mu$m in diameter; mainly in algal aggregates; (3) microvugs, 4$\mu$m to 10 $\mu$m in diameter; mainly in algal aggregates; (4) microchannels, 12$\mu$m length and 0.5$\mu$m width; in algal aggregates and stromatoporoids. (Abstract shortened by UMI.)Dept. of Geology and Geological Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1992 .A958. Source: Masters Abstracts International, Volume: 31-04, page: 1695. Thesis (M.Sc.)--University of Windsor (Canada), 1992. |
format |
Master Thesis |
author |
Azmy, Karem. |
author_facet |
Azmy, Karem. |
author_sort |
Azmy, Karem. |
title |
Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. |
title_short |
Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. |
title_full |
Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. |
title_fullStr |
Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. |
title_full_unstemmed |
Subsurface diagenetic evolution and porosity evaluation of Middle-Upper Devonian Kee Scarp reef, Norman Wells, Northwest Territories, Canada. |
title_sort |
subsurface diagenetic evolution and porosity evaluation of middle-upper devonian kee scarp reef, norman wells, northwest territories, canada. |
publisher |
University of Windsor |
publishDate |
1992 |
url |
https://scholar.uwindsor.ca/etd/3664 https://scholar.uwindsor.ca/cgi/viewcontent.cgi?article=4663&context=etd |
long_lat |
ENVELOPE(-126.725,-126.725,65.310,65.310) ENVELOPE(-117.519,-117.519,56.367,56.367) ENVELOPE(-126.833,-126.833,65.282,65.282) |
geographic |
Canada Kee Scarp Leddy Norman Wells Northwest Territories |
geographic_facet |
Canada Kee Scarp Leddy Norman Wells Northwest Territories |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Electronic Theses and Dissertations |
op_relation |
https://scholar.uwindsor.ca/etd/3664 https://scholar.uwindsor.ca/cgi/viewcontent.cgi?article=4663&context=etd |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766150537403695104 |