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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fterudit:oai:erudit.org:1062535ar 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 http://id.erudit.org/iderudit/1062535ar https://doi.org/10.4138/atlgeol.2019.009 en eng Atlantic Geoscience Society Érudit Atlantic Geology : Journal of the Atlantic Geoscience Society vol. 55 (2019) http://id.erudit.org/iderudit/1062535ar doi:10.4138/atlgeol.2019.009 All Rights Reserved ©, 2019Atlantic Geology text 2019 fterudit https://doi.org/10.4138/atlgeol.2019.009 2020-06-06T23:10:27Z 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. Text Ross Island Érudit.org (Université Montréal) Ross Island Canada Manan ENVELOPE(8.748,8.748,62.793,62.793) Atlantic Geology 265 274 |
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Open Polar |
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Érudit.org (Université Montréal) |
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fterudit |
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 |
Text |
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 |
http://id.erudit.org/iderudit/1062535ar https://doi.org/10.4138/atlgeol.2019.009 |
long_lat |
ENVELOPE(8.748,8.748,62.793,62.793) |
geographic |
Ross Island Canada Manan |
geographic_facet |
Ross Island Canada Manan |
genre |
Ross Island |
genre_facet |
Ross Island |
op_relation |
Atlantic Geology : Journal of the Atlantic Geoscience Society vol. 55 (2019) http://id.erudit.org/iderudit/1062535ar doi:10.4138/atlgeol.2019.009 |
op_rights |
All Rights Reserved ©, 2019Atlantic Geology |
op_doi |
https://doi.org/10.4138/atlgeol.2019.009 |
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Atlantic Geology |
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265 |
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274 |
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1766179487147360256 |