Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America
Detrital zircon U-Pb geochronology and Hf isotope geochemistry provide new insights into the provenance, sedimentary transport, and tectonic evolution of the Roberts Mountains allochthon strata of north-central Nevada. Using laser-ablation inductively coupled plasma mass spectrometry, a total of 115...
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Online Access: | http://hdl.handle.net/11714/6235 https://doi.org/10.1130/GES01252.1 |
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ftunivnevadair:oai:scholarworks.unr.edu:11714/6235 2023-05-15T17:54:49+02:00 Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America Linde, Gwen M. Trexler, James H. Cashman, Patricia H. Gehrels, George Dickinson, William R. 2016 PDF http://hdl.handle.net/11714/6235 https://doi.org/10.1130/GES01252.1 unknown Linde, G. M., Trexler, J. H., Cashman, P. H., Gehrels, G., & Dickinson, W. R. (2016). Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America. Geosphere, 12(3), 1016–1031. doi:10.1130/ges01252.1 1553-040X http://hdl.handle.net/11714/6235 doi:10.1130/GES01252.1 In Copyright (All Rights Reserved) http://www.geosociety.org/gsa/pubs/openaccess.aspx Geological Society of America https://doi.org/10.1130/GES01252.1 Article 2016 ftunivnevadair https://doi.org/10.1130/GES01252.1 2020-12-09T10:19:35Z Detrital zircon U-Pb geochronology and Hf isotope geochemistry provide new insights into the provenance, sedimentary transport, and tectonic evolution of the Roberts Mountains allochthon strata of north-central Nevada. Using laser-ablation inductively coupled plasma mass spectrometry, a total of 1151 zircon grains from six Ordovician to Devonian arenite samples were analyzed for U-Pb ages of these, 228 grains were further analyzed for Hf isotope ratios. Five of the units sampled have similar U-Pb age peaks and Hf isotope ratios, while the ages and ratios of the Ordovician lower Vinini Formation are significantly different. Comparison of our data with that of igneous basement rocks and other sedimentary units supports our interpretation that the lower Vinini Formation originated in the north-central Laurentian craton. The other five units sampled, as well as Ordovician passive margin sandstones of the western Laurentian margin, had a common source in the Peace River Arch region of western Canada. We propose that the Roberts Mountains allochthon strata were deposited near the Peace River Arch region, and subsequently tectonically transported south along the Laurentian margin, from where they were emplaced onto the craton during the Antler orogeny. Article in Journal/Newspaper Peace River University of Nevada, Reno: ScholarWorks Repository Canada Geosphere 12 3 1016 1031 |
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Open Polar |
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University of Nevada, Reno: ScholarWorks Repository |
op_collection_id |
ftunivnevadair |
language |
unknown |
description |
Detrital zircon U-Pb geochronology and Hf isotope geochemistry provide new insights into the provenance, sedimentary transport, and tectonic evolution of the Roberts Mountains allochthon strata of north-central Nevada. Using laser-ablation inductively coupled plasma mass spectrometry, a total of 1151 zircon grains from six Ordovician to Devonian arenite samples were analyzed for U-Pb ages of these, 228 grains were further analyzed for Hf isotope ratios. Five of the units sampled have similar U-Pb age peaks and Hf isotope ratios, while the ages and ratios of the Ordovician lower Vinini Formation are significantly different. Comparison of our data with that of igneous basement rocks and other sedimentary units supports our interpretation that the lower Vinini Formation originated in the north-central Laurentian craton. The other five units sampled, as well as Ordovician passive margin sandstones of the western Laurentian margin, had a common source in the Peace River Arch region of western Canada. We propose that the Roberts Mountains allochthon strata were deposited near the Peace River Arch region, and subsequently tectonically transported south along the Laurentian margin, from where they were emplaced onto the craton during the Antler orogeny. |
format |
Article in Journal/Newspaper |
author |
Linde, Gwen M. Trexler, James H. Cashman, Patricia H. Gehrels, George Dickinson, William R. |
spellingShingle |
Linde, Gwen M. Trexler, James H. Cashman, Patricia H. Gehrels, George Dickinson, William R. Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America |
author_facet |
Linde, Gwen M. Trexler, James H. Cashman, Patricia H. Gehrels, George Dickinson, William R. |
author_sort |
Linde, Gwen M. |
title |
Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America |
title_short |
Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America |
title_full |
Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America |
title_fullStr |
Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America |
title_full_unstemmed |
Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America |
title_sort |
detrital zircon u-pb geochronology and hf isotope geochemistry of the roberts mountains allochthon: new insights into the early paleozoic tectonics of western north america |
publishDate |
2016 |
url |
http://hdl.handle.net/11714/6235 https://doi.org/10.1130/GES01252.1 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Peace River |
genre_facet |
Peace River |
op_source |
https://doi.org/10.1130/GES01252.1 |
op_relation |
Linde, G. M., Trexler, J. H., Cashman, P. H., Gehrels, G., & Dickinson, W. R. (2016). Detrital zircon U-Pb geochronology and Hf isotope geochemistry of the Roberts Mountains allochthon: New insights into the early Paleozoic tectonics of western North America. Geosphere, 12(3), 1016–1031. doi:10.1130/ges01252.1 1553-040X http://hdl.handle.net/11714/6235 doi:10.1130/GES01252.1 |
op_rights |
In Copyright (All Rights Reserved) http://www.geosociety.org/gsa/pubs/openaccess.aspx Geological Society of America |
op_doi |
https://doi.org/10.1130/GES01252.1 |
container_title |
Geosphere |
container_volume |
12 |
container_issue |
3 |
container_start_page |
1016 |
op_container_end_page |
1031 |
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1766162664540602368 |