Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ...
Neoproterozoic to Cretaceous age strata in the Mackenzie Mountains of the northern Canadian Cordillera record many geological events that affected the western margin of Ancestral North America. Two of these events that are the focus of this study are; (1) the development of a thick long-lived passiv...
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ftdatacite:10.14288/1.0052744 2023-08-27T04:10:31+02:00 Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... Leslie, Christopher Dean 2009 https://dx.doi.org/10.14288/1.0052744 https://doi.library.ubc.ca/10.14288/1.0052744 en eng University of British Columbia Text article-journal ScholarlyArticle 2009 ftdatacite https://doi.org/10.14288/1.0052744 2023-08-07T14:24:23Z Neoproterozoic to Cretaceous age strata in the Mackenzie Mountains of the northern Canadian Cordillera record many geological events that affected the western margin of Ancestral North America. Two of these events that are the focus of this study are; (1) the development of a thick long-lived passive margin sequence of sedimentary rocks; and (2) continental rifting of this passive margin in Ordovician time that was accompanied with alkaline volcanism of the Marmot Formation. Sedimentary units from throughout the Mackenzie Mountains stratigraphy contain ubiquitous detrital zircons with U-Pb ages of 2800 – 2415 Ma and 2080 – 1700 Ma; these reflect a component of sediment derived from basement sources of western Laurentia. More surprising is the abundance of “anomalous” detrital zircons ages (e.g., 1800 – 1000 Ma) in these units that cannot be linked to known local sources. The most likely source for detrital zircons of these ages are felsic igneous rocks now exposed in southern and eastern North America. We ... Text Mackenzie mountains Northwest Territories DataCite Metadata Store (German National Library of Science and Technology) Northwest Territories |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
Neoproterozoic to Cretaceous age strata in the Mackenzie Mountains of the northern Canadian Cordillera record many geological events that affected the western margin of Ancestral North America. Two of these events that are the focus of this study are; (1) the development of a thick long-lived passive margin sequence of sedimentary rocks; and (2) continental rifting of this passive margin in Ordovician time that was accompanied with alkaline volcanism of the Marmot Formation. Sedimentary units from throughout the Mackenzie Mountains stratigraphy contain ubiquitous detrital zircons with U-Pb ages of 2800 – 2415 Ma and 2080 – 1700 Ma; these reflect a component of sediment derived from basement sources of western Laurentia. More surprising is the abundance of “anomalous” detrital zircons ages (e.g., 1800 – 1000 Ma) in these units that cannot be linked to known local sources. The most likely source for detrital zircons of these ages are felsic igneous rocks now exposed in southern and eastern North America. We ... |
format |
Text |
author |
Leslie, Christopher Dean |
spellingShingle |
Leslie, Christopher Dean Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... |
author_facet |
Leslie, Christopher Dean |
author_sort |
Leslie, Christopher Dean |
title |
Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... |
title_short |
Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... |
title_full |
Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... |
title_fullStr |
Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... |
title_full_unstemmed |
Detrital zircon geochronology and rift-related magmatism : central Mackenzie Mountains, Northwest Territories ... |
title_sort |
detrital zircon geochronology and rift-related magmatism : central mackenzie mountains, northwest territories ... |
publisher |
University of British Columbia |
publishDate |
2009 |
url |
https://dx.doi.org/10.14288/1.0052744 https://doi.library.ubc.ca/10.14288/1.0052744 |
geographic |
Northwest Territories |
geographic_facet |
Northwest Territories |
genre |
Mackenzie mountains Northwest Territories |
genre_facet |
Mackenzie mountains Northwest Territories |
op_doi |
https://doi.org/10.14288/1.0052744 |
_version_ |
1775352618666688512 |