Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada
A new three-dimensional (3D) inversion strategy is applied to new compilations of gravity and magnetic data to reassess the role of crustal lineaments in the development of the western Laurentian margin, Selwyn Basin, and associated sediment-hosted zinc–lead (Zn–Pb) deposits. The region’s history is...
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crcansciencepubl:10.1139/cjes-2021-0003 2024-04-28T08:20:24+00:00 Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada Hayward, Nathan Paradis, Suzanne 2021 http://dx.doi.org/10.1139/cjes-2021-0003 https://cdnsciencepub.com/doi/full-xml/10.1139/cjes-2021-0003 https://cdnsciencepub.com/doi/pdf/10.1139/cjes-2021-0003 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 58, issue 12, page 1283-1300 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjes-2021-0003 2024-04-09T06:56:29Z A new three-dimensional (3D) inversion strategy is applied to new compilations of gravity and magnetic data to reassess the role of crustal lineaments in the development of the western Laurentian margin, Selwyn Basin, and associated sediment-hosted zinc–lead (Zn–Pb) deposits. The region’s history is obscured by multiple tectonic overprints, including terrane accretion, plutonism, and thrust faulting. Regionally continuous, broadly northeast-trending crustal lineaments, including the Liard line, Fort Norman structure, and Leith Ridge fault, were interpreted as having had long-standing influence on craton, margin, and sedimentary basin development. An east–northeast-trending lineament, Mackenzie River, traced from the Misty Creek Embayment to Great Bear Lake, is interpreted as the southern edge of a cratonic promontory. The location of the Liard line, associated with a transfer fault that bounds the Macdonald Platform promontory, is refined. New geophysical results support the continuity of the Fort Norman structure below the Selwyn Basin, but limited evidence exists for the Leith Ridge fault in this area. A northwest-trending lineament that bounds the craton is interpreted as a crustal manifestation of lithospheric thinning of the Laurentian margin, as echoed by a change in the depth of the lithosphere–asthenosphere boundary. The structure delimits the eastern extent of mid- to Late Cretaceous granitic intrusions and is straddled by Mississippi Valley-type Zn–Pb occurrences, following their palinspastic restoration. Clastic-dominated Zn–Pb occurrences are aligned along another northwest-trending lineament interpreted to be associated with a shallowing of lower crustal rocks. Article in Journal/Newspaper Great Bear Lake Mackenzie river Northwest Territories Yukon Canadian Science Publishing Canadian Journal of Earth Sciences |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Hayward, Nathan Paradis, Suzanne Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
A new three-dimensional (3D) inversion strategy is applied to new compilations of gravity and magnetic data to reassess the role of crustal lineaments in the development of the western Laurentian margin, Selwyn Basin, and associated sediment-hosted zinc–lead (Zn–Pb) deposits. The region’s history is obscured by multiple tectonic overprints, including terrane accretion, plutonism, and thrust faulting. Regionally continuous, broadly northeast-trending crustal lineaments, including the Liard line, Fort Norman structure, and Leith Ridge fault, were interpreted as having had long-standing influence on craton, margin, and sedimentary basin development. An east–northeast-trending lineament, Mackenzie River, traced from the Misty Creek Embayment to Great Bear Lake, is interpreted as the southern edge of a cratonic promontory. The location of the Liard line, associated with a transfer fault that bounds the Macdonald Platform promontory, is refined. New geophysical results support the continuity of the Fort Norman structure below the Selwyn Basin, but limited evidence exists for the Leith Ridge fault in this area. A northwest-trending lineament that bounds the craton is interpreted as a crustal manifestation of lithospheric thinning of the Laurentian margin, as echoed by a change in the depth of the lithosphere–asthenosphere boundary. The structure delimits the eastern extent of mid- to Late Cretaceous granitic intrusions and is straddled by Mississippi Valley-type Zn–Pb occurrences, following their palinspastic restoration. Clastic-dominated Zn–Pb occurrences are aligned along another northwest-trending lineament interpreted to be associated with a shallowing of lower crustal rocks. |
format |
Article in Journal/Newspaper |
author |
Hayward, Nathan Paradis, Suzanne |
author_facet |
Hayward, Nathan Paradis, Suzanne |
author_sort |
Hayward, Nathan |
title |
Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada |
title_short |
Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada |
title_full |
Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada |
title_fullStr |
Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada |
title_full_unstemmed |
Geophysical reassessment of the role of ancient lineaments on the development of the western Laurentian margin and its sediment-hosted Zn–Pb deposits, Yukon and Northwest Territories, Canada |
title_sort |
geophysical reassessment of the role of ancient lineaments on the development of the western laurentian margin and its sediment-hosted zn–pb deposits, yukon and northwest territories, canada |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjes-2021-0003 https://cdnsciencepub.com/doi/full-xml/10.1139/cjes-2021-0003 https://cdnsciencepub.com/doi/pdf/10.1139/cjes-2021-0003 |
genre |
Great Bear Lake Mackenzie river Northwest Territories Yukon |
genre_facet |
Great Bear Lake Mackenzie river Northwest Territories Yukon |
op_source |
Canadian Journal of Earth Sciences volume 58, issue 12, page 1283-1300 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2021-0003 |
container_title |
Canadian Journal of Earth Sciences |
_version_ |
1797583336917434368 |