Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada
The Hudson Bay Basin is the largest intracratonic basin in North America, but remains a frontier area for our knowledge of its stratigraphy and sedimentology and its hydrocarbon potential. Large domal reefs (up to 10 m thick and 500 m wide) in the Upper Ordovician Red Head Rapids Formation on Southa...
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Université d'Ottawa / University of Ottawa
2016
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ftunivottawa:oai:ruor.uottawa.ca:10393/35374 2023-05-15T16:35:23+02:00 Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada Castagner, Ariane Desrochers, André 2016 application/pdf http://hdl.handle.net/10393/35374 https://doi.org/10.20381/ruor-332 en eng Université d'Ottawa / University of Ottawa http://hdl.handle.net/10393/35374 http://dx.doi.org/10.20381/ruor-332 reef Ordovician Southampton Island Thesis 2016 ftunivottawa https://doi.org/10.20381/ruor-332 2021-01-04T18:26:34Z The Hudson Bay Basin is the largest intracratonic basin in North America, but remains a frontier area for our knowledge of its stratigraphy and sedimentology and its hydrocarbon potential. Large domal reefs (up to 10 m thick and 500 m wide) in the Upper Ordovician Red Head Rapids Formation on Southampton Island developed on the margin of this shallow-marine evaporitic basin in which physical and chemical seawater parameters were distinct from the open ocean and in which a diverse community of reef-building and dwelling metazoans was unable to flourish. The main reef facies comprise boundstone and cementstone composed of various proportions of early-calcified sponge tissues, microbial encrusters, synsedimentary cement and small colonial metazoans. The accretionary mechanisms of the Red Head Rapids reefs were mainly the result of framebuilding by early-calcified sponges and small colonial corals and binding by calcimicrobial elements for the boundstone facies, and of massive aragonitic cement precipitation near the seafloor for the cementstone facies. These Upper Ordovician reefs, in which microbialites dominate but coexist with metazoans, were more widespread in the Early Ordovician immediately prior to the Middle to Late Ordovician expansion of skeletal-dominant reefs. The Upper Ordovician reefs on Southampton Island, porous and locally bitumen impregnated, underwent early marine, near-surface and progressive burial diagenesis; reducing its primary porosity but significantly increasing its secondary porosity. They represent one of the major untested petroleum play types identified in the Hudson Bay Basin. Thesis Hudson Bay Nunavut Southampton Island uO Research (University of Ottawa - uOttawa) Canada Hudson Hudson Bay Nunavut Red Head Rapids ENVELOPE(-94.525,-94.525,58.158,58.158) Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) |
institution |
Open Polar |
collection |
uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
reef Ordovician Southampton Island |
spellingShingle |
reef Ordovician Southampton Island Castagner, Ariane Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada |
topic_facet |
reef Ordovician Southampton Island |
description |
The Hudson Bay Basin is the largest intracratonic basin in North America, but remains a frontier area for our knowledge of its stratigraphy and sedimentology and its hydrocarbon potential. Large domal reefs (up to 10 m thick and 500 m wide) in the Upper Ordovician Red Head Rapids Formation on Southampton Island developed on the margin of this shallow-marine evaporitic basin in which physical and chemical seawater parameters were distinct from the open ocean and in which a diverse community of reef-building and dwelling metazoans was unable to flourish. The main reef facies comprise boundstone and cementstone composed of various proportions of early-calcified sponge tissues, microbial encrusters, synsedimentary cement and small colonial metazoans. The accretionary mechanisms of the Red Head Rapids reefs were mainly the result of framebuilding by early-calcified sponges and small colonial corals and binding by calcimicrobial elements for the boundstone facies, and of massive aragonitic cement precipitation near the seafloor for the cementstone facies. These Upper Ordovician reefs, in which microbialites dominate but coexist with metazoans, were more widespread in the Early Ordovician immediately prior to the Middle to Late Ordovician expansion of skeletal-dominant reefs. The Upper Ordovician reefs on Southampton Island, porous and locally bitumen impregnated, underwent early marine, near-surface and progressive burial diagenesis; reducing its primary porosity but significantly increasing its secondary porosity. They represent one of the major untested petroleum play types identified in the Hudson Bay Basin. |
author2 |
Desrochers, André |
format |
Thesis |
author |
Castagner, Ariane |
author_facet |
Castagner, Ariane |
author_sort |
Castagner, Ariane |
title |
Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada |
title_short |
Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada |
title_full |
Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada |
title_fullStr |
Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada |
title_full_unstemmed |
Carbonate Sedimentology and Diagenesis of an Upper Ordovician Sponge-microbe-cement Mound on Southampton Island, Nunavut, Canada |
title_sort |
carbonate sedimentology and diagenesis of an upper ordovician sponge-microbe-cement mound on southampton island, nunavut, canada |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2016 |
url |
http://hdl.handle.net/10393/35374 https://doi.org/10.20381/ruor-332 |
long_lat |
ENVELOPE(-94.525,-94.525,58.158,58.158) ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Canada Hudson Hudson Bay Nunavut Red Head Rapids Southampton Island |
geographic_facet |
Canada Hudson Hudson Bay Nunavut Red Head Rapids Southampton Island |
genre |
Hudson Bay Nunavut Southampton Island |
genre_facet |
Hudson Bay Nunavut Southampton Island |
op_relation |
http://hdl.handle.net/10393/35374 http://dx.doi.org/10.20381/ruor-332 |
op_doi |
https://doi.org/10.20381/ruor-332 |
_version_ |
1766025597364994048 |