Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada
Zircon grains from a granitic pegmatite clast from conglomerate at the base of the Ross Island Formation on Grand Manan Island indicate an igneous crystallization age of 664.1 ± 4.6 Ma. The clast also contains abundant older inherited grains back to the Archean. Muscovite in the same clast and an ad...
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/28889 2023-05-15T18:07:23+02:00 Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada Barr, Sandra M. Mortensen, James K. 2019-07-28 text/html application/pdf https://journals.lib.unb.ca/index.php/ag/article/view/28889 eng eng Atlantic Geoscience Society https://journals.lib.unb.ca/index.php/ag/article/view/28889/1882524503 https://journals.lib.unb.ca/index.php/ag/article/view/28889/1882524465 https://journals.lib.unb.ca/index.php/ag/article/view/28889 Copyright (c) 2019 Atlantic Geology Atlantic Geoscience; Vol. 55 (2019); 265 - 274 2564-2987 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2019 ftuninewbrunojs 2022-07-11T11:42:13Z Zircon grains from a granitic pegmatite clast from conglomerate at the base of the Ross Island Formation on Grand Manan Island indicate an igneous crystallization age of 664.1 ± 4.6 Ma. The clast also contains abundant older inherited grains back to the Archean. Muscovite in the same clast and an additional similar clast yielded cooling ages of 607.0 ± 3.7 Ma and 619.6 ± 4.1 Ma, respectively, providing a maximum depositional age for the host conglomerate of the Ross Island Formation. The similarity in age to pegmatite in the Seven Hundred Acre Island Formation in Penobscot Bay, Maine, supports earlier correlations between the two areas based on similarities in Neoproterozoic quartzite and carbonate units. Article in Journal/Newspaper Ross Island University of New Brunswick: Centre for Digital Scholarship Journals Canada Manan ENVELOPE(8.748,8.748,62.793,62.793) Ross Island |
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Open Polar |
collection |
University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
Zircon grains from a granitic pegmatite clast from conglomerate at the base of the Ross Island Formation on Grand Manan Island indicate an igneous crystallization age of 664.1 ± 4.6 Ma. The clast also contains abundant older inherited grains back to the Archean. Muscovite in the same clast and an additional similar clast yielded cooling ages of 607.0 ± 3.7 Ma and 619.6 ± 4.1 Ma, respectively, providing a maximum depositional age for the host conglomerate of the Ross Island Formation. The similarity in age to pegmatite in the Seven Hundred Acre Island Formation in Penobscot Bay, Maine, supports earlier correlations between the two areas based on similarities in Neoproterozoic quartzite and carbonate units. |
format |
Article in Journal/Newspaper |
author |
Barr, Sandra M. Mortensen, James K. |
spellingShingle |
Barr, Sandra M. Mortensen, James K. Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada |
author_facet |
Barr, Sandra M. Mortensen, James K. |
author_sort |
Barr, Sandra M. |
title |
Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada |
title_short |
Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada |
title_full |
Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada |
title_fullStr |
Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada |
title_full_unstemmed |
Neoproterozoic U–Pb (zircon) and ⁴⁰Ar/³⁹Ar (muscovite) ages from granitic pegmatite clasts, basal Ross Island Formation, Grand Manan Island, New Brunswick, Canada |
title_sort |
neoproterozoic u–pb (zircon) and ⁴⁰ar/³⁹ar (muscovite) ages from granitic pegmatite clasts, basal ross island formation, grand manan island, new brunswick, canada |
publisher |
Atlantic Geoscience Society |
publishDate |
2019 |
url |
https://journals.lib.unb.ca/index.php/ag/article/view/28889 |
long_lat |
ENVELOPE(8.748,8.748,62.793,62.793) |
geographic |
Canada Manan Ross Island |
geographic_facet |
Canada Manan Ross Island |
genre |
Ross Island |
genre_facet |
Ross Island |
op_source |
Atlantic Geoscience; Vol. 55 (2019); 265 - 274 2564-2987 |
op_relation |
https://journals.lib.unb.ca/index.php/ag/article/view/28889/1882524503 https://journals.lib.unb.ca/index.php/ag/article/view/28889/1882524465 https://journals.lib.unb.ca/index.php/ag/article/view/28889 |
op_rights |
Copyright (c) 2019 Atlantic Geology |
_version_ |
1766179486964908032 |