Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia
SUMMARY: Geological mapping and stratigraphic anaylsis of the early Neoproterozoic Fifteenmile Group in the western Ogilvie Mountains of Yukon, Canada, has revealed large lateral facies changes in both carbonate and siliciclastic strata. Syn-sedimentary NNW-side-down normal faulting during depositio...
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/19397 2023-05-15T17:09:33+02:00 Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia Macdonald, Francis A. Halverson, Galen P. Strauss, Justin V. Smith, Emily F. Cox, Grant Sperling, Erik A. Roots, Charles F. 2012-10-23 application/pdf text/html https://journals.lib.unb.ca/index.php/GC/article/view/19397 eng eng Geological Association of Canada https://journals.lib.unb.ca/index.php/GC/article/view/19397/21849 https://journals.lib.unb.ca/index.php/GC/article/view/19397/21890 https://journals.lib.unb.ca/index.php/GC/article/view/19397 Copyright (c) 2015 Geoscience Canada Geoscience Canada; Volume 39, Number 2 (2012) 1911-4850 0315-0941 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2012 ftuninewbrunojs 2022-07-11T11:48:25Z SUMMARY: Geological mapping and stratigraphic anaylsis of the early Neoproterozoic Fifteenmile Group in the western Ogilvie Mountains of Yukon, Canada, has revealed large lateral facies changes in both carbonate and siliciclastic strata. Syn-sedimentary NNW-side-down normal faulting during deposition of the lower Fifteenmile Group generated local topographic relief and wedge-shaped stratal geometries. These strata were eventually capped by platformal carbonate after the establishment of a NNW-facing stromatolitic reef complex that formed adjacent to the coeval Little Dal Group of the Mackenzie Mountains, Northwest Territories. Correlations between specific formations within these groups are tested with carbon isotope chemostratigraphy. As there are no known 830-780 Ma stratigraphic successions south of 62°N, the basin-forming event that accommodated the Fifteenmile and Little Dal Groups of the Ogilvie and Mackenzie Mountains and equivalent strata in the Shaler Supergroup of Victoria Island was restricted to the northwest margin of Laurentia. Therefore, this event does not represent widespread rifting of the entire western margin of Laurentia and instead we propose that these strata were accommodated in a failed rift generated by localized subsidence associated with the emplacement of the coeval Guibei (China) and Gairdner (Australia) large igneous provinces. The northern margin of Laurentia was reactivated by renewed extension at ca. 720 Ma associated with the emplacement of the Franklin large igneous province. Significant crustal thinning and generation of a thermally subsiding passive margin on the western margin of Laurentia may not have occurred until the late Ediacaran.RÉSUMÉLe cartographiage géologique et l’analyse stratigraphique du groupe néoprotézoïque Fifteenmile situé à l’ouest des montagnes Ogilvie du Yukon, Canada, ont révélé de grands changements latéraux de faciès à la fois pour les strates carbonatées et silicoclastiques. La mise en place des failles normales syn-sédimentaires inclinées vers le ... Article in Journal/Newspaper Mackenzie mountains Northwest Territories Ogilvie Mountains Victoria Island victoria island Yukon University of New Brunswick: Centre for Digital Scholarship Journals Canada Northwest Territories Ogilvie ENVELOPE(-139.746,-139.746,63.563,63.563) Ogilvie Mountains ENVELOPE(-138.254,-138.254,64.583,64.583) Yukon |
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Open Polar |
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University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
SUMMARY: Geological mapping and stratigraphic anaylsis of the early Neoproterozoic Fifteenmile Group in the western Ogilvie Mountains of Yukon, Canada, has revealed large lateral facies changes in both carbonate and siliciclastic strata. Syn-sedimentary NNW-side-down normal faulting during deposition of the lower Fifteenmile Group generated local topographic relief and wedge-shaped stratal geometries. These strata were eventually capped by platformal carbonate after the establishment of a NNW-facing stromatolitic reef complex that formed adjacent to the coeval Little Dal Group of the Mackenzie Mountains, Northwest Territories. Correlations between specific formations within these groups are tested with carbon isotope chemostratigraphy. As there are no known 830-780 Ma stratigraphic successions south of 62°N, the basin-forming event that accommodated the Fifteenmile and Little Dal Groups of the Ogilvie and Mackenzie Mountains and equivalent strata in the Shaler Supergroup of Victoria Island was restricted to the northwest margin of Laurentia. Therefore, this event does not represent widespread rifting of the entire western margin of Laurentia and instead we propose that these strata were accommodated in a failed rift generated by localized subsidence associated with the emplacement of the coeval Guibei (China) and Gairdner (Australia) large igneous provinces. The northern margin of Laurentia was reactivated by renewed extension at ca. 720 Ma associated with the emplacement of the Franklin large igneous province. Significant crustal thinning and generation of a thermally subsiding passive margin on the western margin of Laurentia may not have occurred until the late Ediacaran.RÉSUMÉLe cartographiage géologique et l’analyse stratigraphique du groupe néoprotézoïque Fifteenmile situé à l’ouest des montagnes Ogilvie du Yukon, Canada, ont révélé de grands changements latéraux de faciès à la fois pour les strates carbonatées et silicoclastiques. La mise en place des failles normales syn-sédimentaires inclinées vers le ... |
format |
Article in Journal/Newspaper |
author |
Macdonald, Francis A. Halverson, Galen P. Strauss, Justin V. Smith, Emily F. Cox, Grant Sperling, Erik A. Roots, Charles F. |
spellingShingle |
Macdonald, Francis A. Halverson, Galen P. Strauss, Justin V. Smith, Emily F. Cox, Grant Sperling, Erik A. Roots, Charles F. Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia |
author_facet |
Macdonald, Francis A. Halverson, Galen P. Strauss, Justin V. Smith, Emily F. Cox, Grant Sperling, Erik A. Roots, Charles F. |
author_sort |
Macdonald, Francis A. |
title |
Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia |
title_short |
Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia |
title_full |
Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia |
title_fullStr |
Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia |
title_full_unstemmed |
Early Neoproterozoic Basin Formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia |
title_sort |
early neoproterozoic basin formation in yukon, canada: implications for the make-up and break-up of rodinia |
publisher |
Geological Association of Canada |
publishDate |
2012 |
url |
https://journals.lib.unb.ca/index.php/GC/article/view/19397 |
long_lat |
ENVELOPE(-139.746,-139.746,63.563,63.563) ENVELOPE(-138.254,-138.254,64.583,64.583) |
geographic |
Canada Northwest Territories Ogilvie Ogilvie Mountains Yukon |
geographic_facet |
Canada Northwest Territories Ogilvie Ogilvie Mountains Yukon |
genre |
Mackenzie mountains Northwest Territories Ogilvie Mountains Victoria Island victoria island Yukon |
genre_facet |
Mackenzie mountains Northwest Territories Ogilvie Mountains Victoria Island victoria island Yukon |
op_source |
Geoscience Canada; Volume 39, Number 2 (2012) 1911-4850 0315-0941 |
op_relation |
https://journals.lib.unb.ca/index.php/GC/article/view/19397/21849 https://journals.lib.unb.ca/index.php/GC/article/view/19397/21890 https://journals.lib.unb.ca/index.php/GC/article/view/19397 |
op_rights |
Copyright (c) 2015 Geoscience Canada |
_version_ |
1766065672789426176 |