Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield
The growing knowledge of the geological record reveals evidence of crustal recycling in the Archean eon. In order to assess the role of recycling of crust into the mantle we have analyzed radiogenic Hf-in-zircon as well as whole-rock Nd and Pb isotope compositions of mantle-derived granitoids of the...
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/4b2db6c2-5f61-4cc7-970f-47e1c07da472 2024-10-13T14:07:09+00:00 Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield Heilimo, Esa Halla, Jaana Andersen, Tom Huhma, Hannu 2013-05 https://researchers.mq.edu.au/en/publications/4b2db6c2-5f61-4cc7-970f-47e1c07da472 https://doi.org/10.1016/j.precamres.2012.01.015 http://www.scopus.com/inward/record.url?scp=84874092044&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Heilimo , E , Halla , J , Andersen , T & Huhma , H 2013 , ' Neoarchean crustal recycling and mantle metasomatism : Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield ' , Precambrian Research , vol. 228 , pp. 250-266 . https://doi.org/10.1016/j.precamres.2012.01.015 Crustal recycling Karelian province Neoarchean Oxygen isotopes Radiogenic isotopes Sanukitoid Zircon article 2013 ftmacquarieunicr https://doi.org/10.1016/j.precamres.2012.01.015 2024-10-03T00:23:11Z The growing knowledge of the geological record reveals evidence of crustal recycling in the Archean eon. In order to assess the role of recycling of crust into the mantle we have analyzed radiogenic Hf-in-zircon as well as whole-rock Nd and Pb isotope compositions of mantle-derived granitoids of the sanukitoid series in the Neoarchean Karelian province, Fennoscandian shield. Homogeneous initial Hf and Nd values suggest that sanukitoids are derived from well-mixed source(s). Limited scatter in the initial Pb isotope data within intrusions as well as in other radiogenic isotopes point to effective mixing processes in the mantle. O isotope data for zircon from Karelian sanukitoids indicate a dominant mantle source (δ 18 O=+5.5-6.1‰) with minor contributions from sources with elevated δ 18 O (+7.0‰ to +8.5‰), such as sediments and altered upper oceanic crust. Our results suggest that the parental melts of sanukitoids are mixtures of depleted mantle and recycled crustal components. A slab breakoff at the end-stage of subduction is a plausible trigger mechanism for sanukitoid magmatism and it explains variable contributions from different δ 18 O sources. Article in Journal/Newspaper Fennoscandian karelian Macquarie University Research Portal Precambrian Research 228 250 266 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
Crustal recycling Karelian province Neoarchean Oxygen isotopes Radiogenic isotopes Sanukitoid Zircon |
spellingShingle |
Crustal recycling Karelian province Neoarchean Oxygen isotopes Radiogenic isotopes Sanukitoid Zircon Heilimo, Esa Halla, Jaana Andersen, Tom Huhma, Hannu Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield |
topic_facet |
Crustal recycling Karelian province Neoarchean Oxygen isotopes Radiogenic isotopes Sanukitoid Zircon |
description |
The growing knowledge of the geological record reveals evidence of crustal recycling in the Archean eon. In order to assess the role of recycling of crust into the mantle we have analyzed radiogenic Hf-in-zircon as well as whole-rock Nd and Pb isotope compositions of mantle-derived granitoids of the sanukitoid series in the Neoarchean Karelian province, Fennoscandian shield. Homogeneous initial Hf and Nd values suggest that sanukitoids are derived from well-mixed source(s). Limited scatter in the initial Pb isotope data within intrusions as well as in other radiogenic isotopes point to effective mixing processes in the mantle. O isotope data for zircon from Karelian sanukitoids indicate a dominant mantle source (δ 18 O=+5.5-6.1‰) with minor contributions from sources with elevated δ 18 O (+7.0‰ to +8.5‰), such as sediments and altered upper oceanic crust. Our results suggest that the parental melts of sanukitoids are mixtures of depleted mantle and recycled crustal components. A slab breakoff at the end-stage of subduction is a plausible trigger mechanism for sanukitoid magmatism and it explains variable contributions from different δ 18 O sources. |
format |
Article in Journal/Newspaper |
author |
Heilimo, Esa Halla, Jaana Andersen, Tom Huhma, Hannu |
author_facet |
Heilimo, Esa Halla, Jaana Andersen, Tom Huhma, Hannu |
author_sort |
Heilimo, Esa |
title |
Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield |
title_short |
Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield |
title_full |
Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield |
title_fullStr |
Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield |
title_full_unstemmed |
Neoarchean crustal recycling and mantle metasomatism:Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield |
title_sort |
neoarchean crustal recycling and mantle metasomatism:hf-nd-pb-o isotope evidence from sanukitoids of the fennoscandian shield |
publishDate |
2013 |
url |
https://researchers.mq.edu.au/en/publications/4b2db6c2-5f61-4cc7-970f-47e1c07da472 https://doi.org/10.1016/j.precamres.2012.01.015 http://www.scopus.com/inward/record.url?scp=84874092044&partnerID=8YFLogxK |
genre |
Fennoscandian karelian |
genre_facet |
Fennoscandian karelian |
op_source |
Heilimo , E , Halla , J , Andersen , T & Huhma , H 2013 , ' Neoarchean crustal recycling and mantle metasomatism : Hf-Nd-Pb-O isotope evidence from sanukitoids of the Fennoscandian shield ' , Precambrian Research , vol. 228 , pp. 250-266 . https://doi.org/10.1016/j.precamres.2012.01.015 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.precamres.2012.01.015 |
container_title |
Precambrian Research |
container_volume |
228 |
container_start_page |
250 |
op_container_end_page |
266 |
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1812813441978597376 |