Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada
International audience The relationship between law-grade metasedimentary and high-grade paragneissic Precambrian rock units in the Bras d'Or terrane of central Cape Breton Island is a long-standing geological problem. Whole rock geochemical and Nd isotopie data from representative components...
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Online Access: | https://hal.science/hal-01066804 https://doi.org/10.4138/atlgeol.2013.002 |
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ftclermontuniv:oai:HAL:hal-01066804v1 2023-05-15T15:46:45+02:00 Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada Barr, Sandra M. Pin, Christian Mcmullin, David W.A. White, Chris E. Department of Earth and Environmental Science Acadia University Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Nova Scotia Department of Natural Resources 2013 https://hal.science/hal-01066804 https://doi.org/10.4138/atlgeol.2013.002 en eng HAL CCSD Atlantic Geology info:eu-repo/semantics/altIdentifier/doi/10.4138/atlgeol.2013.002 hal-01066804 https://hal.science/hal-01066804 doi:10.4138/atlgeol.2013.002 Atlantic Geology https://hal.science/hal-01066804 Atlantic Geology, 2013, 49, pp.57-69. ⟨10.4138/atlgeol.2013.002⟩ [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2013 ftclermontuniv https://doi.org/10.4138/atlgeol.2013.002 2023-03-15T00:01:29Z International audience The relationship between law-grade metasedimentary and high-grade paragneissic Precambrian rock units in the Bras d'Or terrane of central Cape Breton Island is a long-standing geological problem. Whole rock geochemical and Nd isotopie data from representative components of these units in the Kellys Mountain area, the Glen Tosh formation and Kellys Mountain Gneiss, show strong similarity. Major and trace element characteristics suggest that protolith sediments for both units were wackes derived from felsic igneous sources and deposited at an active continental margin. Samarium-Nd isotopie data in combination with previously published detrital zircon ages show that the sediments contained an ancient (ca. 2 Ga) end-member of recycled continental crust mixed with a juvenile component of Late Neoproterozoic age. The similarities suggest that the rocks represent the same sedimentary unit at different grades of metamorphism, implying a major crustal break under the area of mixed dioritic and granitic rocks that separates the gneissic and lower grade rocks. Article in Journal/Newspaper Breton Island HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) Canada Breton Island ENVELOPE(141.383,141.383,-66.800,-66.800) Atlantic Geology 49 57 |
institution |
Open Polar |
collection |
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) |
op_collection_id |
ftclermontuniv |
language |
English |
topic |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes Barr, Sandra M. Pin, Christian Mcmullin, David W.A. White, Chris E. Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada |
topic_facet |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The relationship between law-grade metasedimentary and high-grade paragneissic Precambrian rock units in the Bras d'Or terrane of central Cape Breton Island is a long-standing geological problem. Whole rock geochemical and Nd isotopie data from representative components of these units in the Kellys Mountain area, the Glen Tosh formation and Kellys Mountain Gneiss, show strong similarity. Major and trace element characteristics suggest that protolith sediments for both units were wackes derived from felsic igneous sources and deposited at an active continental margin. Samarium-Nd isotopie data in combination with previously published detrital zircon ages show that the sediments contained an ancient (ca. 2 Ga) end-member of recycled continental crust mixed with a juvenile component of Late Neoproterozoic age. The similarities suggest that the rocks represent the same sedimentary unit at different grades of metamorphism, implying a major crustal break under the area of mixed dioritic and granitic rocks that separates the gneissic and lower grade rocks. |
author2 |
Department of Earth and Environmental Science Acadia University Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Nova Scotia Department of Natural Resources |
format |
Article in Journal/Newspaper |
author |
Barr, Sandra M. Pin, Christian Mcmullin, David W.A. White, Chris E. |
author_facet |
Barr, Sandra M. Pin, Christian Mcmullin, David W.A. White, Chris E. |
author_sort |
Barr, Sandra M. |
title |
Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada |
title_short |
Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada |
title_full |
Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada |
title_fullStr |
Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada |
title_full_unstemmed |
Whole-rock chemical and Sm-Nd isotopie composition of a Late Proterozoic metasedimentary sequence in Ganderia: Kellys Mountain, Bras d'Or terrane, Nova Scotia, Canada |
title_sort |
whole-rock chemical and sm-nd isotopie composition of a late proterozoic metasedimentary sequence in ganderia: kellys mountain, bras d'or terrane, nova scotia, canada |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-01066804 https://doi.org/10.4138/atlgeol.2013.002 |
long_lat |
ENVELOPE(141.383,141.383,-66.800,-66.800) |
geographic |
Canada Breton Island |
geographic_facet |
Canada Breton Island |
genre |
Breton Island |
genre_facet |
Breton Island |
op_source |
Atlantic Geology https://hal.science/hal-01066804 Atlantic Geology, 2013, 49, pp.57-69. ⟨10.4138/atlgeol.2013.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.4138/atlgeol.2013.002 hal-01066804 https://hal.science/hal-01066804 doi:10.4138/atlgeol.2013.002 |
op_doi |
https://doi.org/10.4138/atlgeol.2013.002 |
container_title |
Atlantic Geology |
container_volume |
49 |
container_start_page |
57 |
_version_ |
1766381460730675200 |