Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica)
International audience The origin of the first continents is still poorly constrained due to the great scarcity of >3.7 Ga rocks. The Napier Complex (East Antarctica) hosts such rocks but the extreme metamorphic conditions it experienced have compromised most isotopic systematics. Here we have st...
Published in: | Geochemical Perspectives Letters |
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ftclermontuniv:oai:HAL:hal-02399658v1 2024-06-23T07:46:43+00:00 Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) Guitreau, Martin Boyet, M. Paquette, Jean-Louis Gannoun, Abdelmouhcine Konc, Z. Benbakkar, M. Suchorski, K. Hénot, J.-M. Laboratoire Magmas et Volcans (LMV) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) ANR-10-LABX-0006,CLERVOLC,Clermont-Ferrand centre for research on volcanism(2010) ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016) 2019-11-08 https://uca.hal.science/hal-02399658 https://uca.hal.science/hal-02399658/document https://uca.hal.science/hal-02399658/file/Guitreau%20M%20GPL%202019.pdf https://doi.org/10.7185/geochemlet.1927 en eng HAL CCSD European Assoication of Geochemistry info:eu-repo/semantics/altIdentifier/doi/10.7185/geochemlet.1927 hal-02399658 https://uca.hal.science/hal-02399658 https://uca.hal.science/hal-02399658/document https://uca.hal.science/hal-02399658/file/Guitreau%20M%20GPL%202019.pdf doi:10.7185/geochemlet.1927 info:eu-repo/semantics/OpenAccess ISSN: 2410-339X EISSN: 2410-3403 Geochemical Perspectives Letters https://uca.hal.science/hal-02399658 Geochemical Perspectives Letters, 2019, 12, pp.7-11. ⟨10.7185/geochemlet.1927⟩ [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2019 ftclermontuniv https://doi.org/10.7185/geochemlet.1927 2024-06-11T00:01:32Z International audience The origin of the first continents is still poorly constrained due to the great scarcity of >3.7 Ga rocks. The Napier Complex (East Antarctica) hosts such rocks but the extreme metamorphic conditions it experienced have compromised most isotopic systematics. Here we have studied Mount Sones and Gage Ridge orthogneisses from the Napier complex using microbeam (LA-MC-ICP-MS) U-Pb and Lu-Hf isotope measurements in zircon, together with 146,147Sm-143,142Nd isotope systematics in the corresponding whole rocks to uncover primary information about their origin. Our U-Pb results reveal that these orthogneisses formed at 3794 ± 40 and 3857 ± 39 Ma, respectively, by reworking of 4456-4356 Ma mafic protocrust, as testified to by 176Lu-176Hf and 147,146Sm-143,142Nd systematics. Other Eoarchean terranes in Greenland, Canada, and China also show involvement of Hadean crust(s) in their formation which suggests that protocrusts were massively reworked to form new continents around the Hadean-Eoarchean boundary. Such a mechanism would account for the absence of early-formed protocrust from the geological record despite recent models proposing rapid crustal growth in the Hadean (~25 % of present day volume or surface). Article in Journal/Newspaper Antarc* Antarctica East Antarctica Greenland HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) Canada East Antarctica Gage ENVELOPE(-118.503,-118.503,56.133,56.133) Gage Ridge ENVELOPE(51.250,51.250,-66.900,-66.900) Greenland Mount Sones ENVELOPE(51.483,51.483,-67.033,-67.033) Napier ENVELOPE(-58.440,-58.440,-62.167,-62.167) Geochemical Perspectives Letters 12 7 11 |
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 |
spellingShingle |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Guitreau, Martin Boyet, M. Paquette, Jean-Louis Gannoun, Abdelmouhcine Konc, Z. Benbakkar, M. Suchorski, K. Hénot, J.-M. Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) |
topic_facet |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience The origin of the first continents is still poorly constrained due to the great scarcity of >3.7 Ga rocks. The Napier Complex (East Antarctica) hosts such rocks but the extreme metamorphic conditions it experienced have compromised most isotopic systematics. Here we have studied Mount Sones and Gage Ridge orthogneisses from the Napier complex using microbeam (LA-MC-ICP-MS) U-Pb and Lu-Hf isotope measurements in zircon, together with 146,147Sm-143,142Nd isotope systematics in the corresponding whole rocks to uncover primary information about their origin. Our U-Pb results reveal that these orthogneisses formed at 3794 ± 40 and 3857 ± 39 Ma, respectively, by reworking of 4456-4356 Ma mafic protocrust, as testified to by 176Lu-176Hf and 147,146Sm-143,142Nd systematics. Other Eoarchean terranes in Greenland, Canada, and China also show involvement of Hadean crust(s) in their formation which suggests that protocrusts were massively reworked to form new continents around the Hadean-Eoarchean boundary. Such a mechanism would account for the absence of early-formed protocrust from the geological record despite recent models proposing rapid crustal growth in the Hadean (~25 % of present day volume or surface). |
author2 |
Laboratoire Magmas et Volcans (LMV) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) ANR-10-LABX-0006,CLERVOLC,Clermont-Ferrand centre for research on volcanism(2010) ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016) |
format |
Article in Journal/Newspaper |
author |
Guitreau, Martin Boyet, M. Paquette, Jean-Louis Gannoun, Abdelmouhcine Konc, Z. Benbakkar, M. Suchorski, K. Hénot, J.-M. |
author_facet |
Guitreau, Martin Boyet, M. Paquette, Jean-Louis Gannoun, Abdelmouhcine Konc, Z. Benbakkar, M. Suchorski, K. Hénot, J.-M. |
author_sort |
Guitreau, Martin |
title |
Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) |
title_short |
Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) |
title_full |
Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) |
title_fullStr |
Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) |
title_full_unstemmed |
Hadean protocrust reworking at the origin of the Archean Napier Complex (Antarctica) |
title_sort |
hadean protocrust reworking at the origin of the archean napier complex (antarctica) |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://uca.hal.science/hal-02399658 https://uca.hal.science/hal-02399658/document https://uca.hal.science/hal-02399658/file/Guitreau%20M%20GPL%202019.pdf https://doi.org/10.7185/geochemlet.1927 |
long_lat |
ENVELOPE(-118.503,-118.503,56.133,56.133) ENVELOPE(51.250,51.250,-66.900,-66.900) ENVELOPE(51.483,51.483,-67.033,-67.033) ENVELOPE(-58.440,-58.440,-62.167,-62.167) |
geographic |
Canada East Antarctica Gage Gage Ridge Greenland Mount Sones Napier |
geographic_facet |
Canada East Antarctica Gage Gage Ridge Greenland Mount Sones Napier |
genre |
Antarc* Antarctica East Antarctica Greenland |
genre_facet |
Antarc* Antarctica East Antarctica Greenland |
op_source |
ISSN: 2410-339X EISSN: 2410-3403 Geochemical Perspectives Letters https://uca.hal.science/hal-02399658 Geochemical Perspectives Letters, 2019, 12, pp.7-11. ⟨10.7185/geochemlet.1927⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.7185/geochemlet.1927 hal-02399658 https://uca.hal.science/hal-02399658 https://uca.hal.science/hal-02399658/document https://uca.hal.science/hal-02399658/file/Guitreau%20M%20GPL%202019.pdf doi:10.7185/geochemlet.1927 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.7185/geochemlet.1927 |
container_title |
Geochemical Perspectives Letters |
container_volume |
12 |
container_start_page |
7 |
op_container_end_page |
11 |
_version_ |
1802647747088613376 |