Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada
The Horn Plateau Formation, composed of isolated reefs, is part of the Devonian strata that formed in the Mackenzie Basin in the Northwest Territories, Canada. The reefs stretch over a ∼350 m northeast–southwest trend and are dominated by tabulate and rugose corals in the northeast, near exposed Can...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2011
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e11-056 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e11-056 http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-056 |
id |
crcansciencepubl:10.1139/e11-056 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e11-056 2024-09-09T19:51:35+00:00 Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada Corlett, Hilary Jones, Brian Jin, Jisuo 2011 http://dx.doi.org/10.1139/e11-056 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e11-056 http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-056 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 48, issue 12, page 1543-1560 ISSN 0008-4077 1480-3313 journal-article 2011 crcansciencepubl https://doi.org/10.1139/e11-056 2024-08-01T04:10:04Z The Horn Plateau Formation, composed of isolated reefs, is part of the Devonian strata that formed in the Mackenzie Basin in the Northwest Territories, Canada. The reefs stretch over a ∼350 m northeast–southwest trend and are dominated by tabulate and rugose corals in the northeast, near exposed Canadian Shield rocks, and stromatoporoids further out in the basin. Detailed facies analyses of each reef type shows distinct differences in their biological makeup, energy regimes, and carbonate sedimentation rates. Geochemical analyses (stable isotopes and rare-earth elements) set against established paleogeography in the Mackenzie Basin reveal that the coral-dominated and stromatoporoid-dominated reefs grew under different ecological conditions. Separations in the data imply that the coral-dominated reefs grew in waters that were relatively enriched in nutrients and the stromatoporoid-dominated reefs, further down the ramp, were in oligotrophic conditions. With no current established method to directly measure Paleozoic nutrient levels or to detect where they were sourced from, it is unclear why the coral-dominated reefs experienced higher nutrient levels. The paleogeography of the Mackenzie Basin could have affected the apparent stratification of nutrients on the carbonate ramp. Possible nutrient sources in the area are from coastal upwelling from the open ocean northwest of the ramp, or locally sourced nutrients from runoff on the adjacent exposed Canadian Shield rocks. Article in Journal/Newspaper Mackenzie Basin Northwest Territories Canadian Science Publishing Canada Horn Plateau ENVELOPE(-119.253,-119.253,62.250,62.250) Northwest Territories The Ramp ENVELOPE(-38.305,-38.305,-53.990,-53.990) Canadian Journal of Earth Sciences 48 12 1543 1560 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The Horn Plateau Formation, composed of isolated reefs, is part of the Devonian strata that formed in the Mackenzie Basin in the Northwest Territories, Canada. The reefs stretch over a ∼350 m northeast–southwest trend and are dominated by tabulate and rugose corals in the northeast, near exposed Canadian Shield rocks, and stromatoporoids further out in the basin. Detailed facies analyses of each reef type shows distinct differences in their biological makeup, energy regimes, and carbonate sedimentation rates. Geochemical analyses (stable isotopes and rare-earth elements) set against established paleogeography in the Mackenzie Basin reveal that the coral-dominated and stromatoporoid-dominated reefs grew under different ecological conditions. Separations in the data imply that the coral-dominated reefs grew in waters that were relatively enriched in nutrients and the stromatoporoid-dominated reefs, further down the ramp, were in oligotrophic conditions. With no current established method to directly measure Paleozoic nutrient levels or to detect where they were sourced from, it is unclear why the coral-dominated reefs experienced higher nutrient levels. The paleogeography of the Mackenzie Basin could have affected the apparent stratification of nutrients on the carbonate ramp. Possible nutrient sources in the area are from coastal upwelling from the open ocean northwest of the ramp, or locally sourced nutrients from runoff on the adjacent exposed Canadian Shield rocks. |
author2 |
Jin, Jisuo |
format |
Article in Journal/Newspaper |
author |
Corlett, Hilary Jones, Brian |
spellingShingle |
Corlett, Hilary Jones, Brian Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada |
author_facet |
Corlett, Hilary Jones, Brian |
author_sort |
Corlett, Hilary |
title |
Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada |
title_short |
Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada |
title_full |
Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada |
title_fullStr |
Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada |
title_full_unstemmed |
Ecological controls on Devonian stromatoporoid-dominated and coral-dominated reef growth in the Mackenzie Basin, Northwest Territories, Canada |
title_sort |
ecological controls on devonian stromatoporoid-dominated and coral-dominated reef growth in the mackenzie basin, northwest territories, canada |
publisher |
Canadian Science Publishing |
publishDate |
2011 |
url |
http://dx.doi.org/10.1139/e11-056 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e11-056 http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-056 |
long_lat |
ENVELOPE(-119.253,-119.253,62.250,62.250) ENVELOPE(-38.305,-38.305,-53.990,-53.990) |
geographic |
Canada Horn Plateau Northwest Territories The Ramp |
geographic_facet |
Canada Horn Plateau Northwest Territories The Ramp |
genre |
Mackenzie Basin Northwest Territories |
genre_facet |
Mackenzie Basin Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 48, issue 12, page 1543-1560 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e11-056 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
48 |
container_issue |
12 |
container_start_page |
1543 |
op_container_end_page |
1560 |
_version_ |
1809920839392428032 |