The tectonic context of hafnium isotopes in zircon
Highlights • Zircon Hf is predictable based on tectonic context. • Global Hf records are geographically and temporally biased. • All major Hf excursions can be linked to regional orogenic events. • Zircon Hf is modulated by the amalgamation, tenure, and breakup of supercontinents. The assembly and d...
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Online Access: | https://oceanrep.geomar.de/id/eprint/55826/ https://oceanrep.geomar.de/id/eprint/55826/1/Sundell%20et%20al.pdf https://doi.org/10.1016/j.epsl.2022.117426 |
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ftoceanrep:oai:oceanrep.geomar.de:55826 2024-02-11T09:58:48+01:00 The tectonic context of hafnium isotopes in zircon Sundell, K.E. Macdonald, F.A. 2022-04 text https://oceanrep.geomar.de/id/eprint/55826/ https://oceanrep.geomar.de/id/eprint/55826/1/Sundell%20et%20al.pdf https://doi.org/10.1016/j.epsl.2022.117426 en eng Elsevier https://oceanrep.geomar.de/id/eprint/55826/1/Sundell%20et%20al.pdf Sundell, K. E. and Macdonald, F. A. (2022) The tectonic context of hafnium isotopes in zircon. Earth and Planetary Science Letters, 584 . Art.Nr. 117426. DOI 10.1016/j.epsl.2022.117426 <https://doi.org/10.1016/j.epsl.2022.117426>. doi:10.1016/j.epsl.2022.117426 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1016/j.epsl.2022.117426 2024-01-15T00:25:24Z Highlights • Zircon Hf is predictable based on tectonic context. • Global Hf records are geographically and temporally biased. • All major Hf excursions can be linked to regional orogenic events. • Zircon Hf is modulated by the amalgamation, tenure, and breakup of supercontinents. The assembly and dispersion of continental crust are first-order controls on paleogeography and geochemical cycles. The associated reworking of Earth's crust can be tracked with zircon initial hafnium (εHfT) through space and time. Here we apply a new method of quantitative analysis using εHfT density estimates based on a compilation of 155,329 εHfT values. Investigation of the global database reveals significant geographic and temporal bias in the εHfT record associated with sampling and regional tectonic events. Recent research has attempted to address global εHfT bias using resampling methods to augment gaps of low εHfT data density, which in turn obfuscates tectonic signals and artificially weights outliers. Instead, we evaluate εHfT density patterns for both igneous and detrital zircon on eight continental zones demarcated by Paleozoic sutures: Africa, Antarctica, Asia, Australia, Baltica, North America, Peri-Gondwana, and South America. Pairwise two-dimensional quantitative comparison highlights similarity in timing and εHfT values between zones, all of which can be linked to documented shared regional tectonism. Integration of all pairwise comparisons reveals that peak similarity corresponds to the timing of supercontinent amalgamation, and that the associated εHfT differs depending on the style of supercontinent amalgamation, particularly internal versus external orogenesis. The three most recent supercontinents produced distinctive εHfT signals, shared by the constituent continental zones. The supercontinents Rodinia and Pangea were constructed through collisions of marginal arc terranes, peripheral to ancient crust, and did not produce highly enriched εHfT values. In contrast, Ediacaran to Cambrian formation of the Gondwana ... Article in Journal/Newspaper Antarc* Antarctica OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Earth and Planetary Science Letters 584 117426 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
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English |
description |
Highlights • Zircon Hf is predictable based on tectonic context. • Global Hf records are geographically and temporally biased. • All major Hf excursions can be linked to regional orogenic events. • Zircon Hf is modulated by the amalgamation, tenure, and breakup of supercontinents. The assembly and dispersion of continental crust are first-order controls on paleogeography and geochemical cycles. The associated reworking of Earth's crust can be tracked with zircon initial hafnium (εHfT) through space and time. Here we apply a new method of quantitative analysis using εHfT density estimates based on a compilation of 155,329 εHfT values. Investigation of the global database reveals significant geographic and temporal bias in the εHfT record associated with sampling and regional tectonic events. Recent research has attempted to address global εHfT bias using resampling methods to augment gaps of low εHfT data density, which in turn obfuscates tectonic signals and artificially weights outliers. Instead, we evaluate εHfT density patterns for both igneous and detrital zircon on eight continental zones demarcated by Paleozoic sutures: Africa, Antarctica, Asia, Australia, Baltica, North America, Peri-Gondwana, and South America. Pairwise two-dimensional quantitative comparison highlights similarity in timing and εHfT values between zones, all of which can be linked to documented shared regional tectonism. Integration of all pairwise comparisons reveals that peak similarity corresponds to the timing of supercontinent amalgamation, and that the associated εHfT differs depending on the style of supercontinent amalgamation, particularly internal versus external orogenesis. The three most recent supercontinents produced distinctive εHfT signals, shared by the constituent continental zones. The supercontinents Rodinia and Pangea were constructed through collisions of marginal arc terranes, peripheral to ancient crust, and did not produce highly enriched εHfT values. In contrast, Ediacaran to Cambrian formation of the Gondwana ... |
format |
Article in Journal/Newspaper |
author |
Sundell, K.E. Macdonald, F.A. |
spellingShingle |
Sundell, K.E. Macdonald, F.A. The tectonic context of hafnium isotopes in zircon |
author_facet |
Sundell, K.E. Macdonald, F.A. |
author_sort |
Sundell, K.E. |
title |
The tectonic context of hafnium isotopes in zircon |
title_short |
The tectonic context of hafnium isotopes in zircon |
title_full |
The tectonic context of hafnium isotopes in zircon |
title_fullStr |
The tectonic context of hafnium isotopes in zircon |
title_full_unstemmed |
The tectonic context of hafnium isotopes in zircon |
title_sort |
tectonic context of hafnium isotopes in zircon |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/55826/ https://oceanrep.geomar.de/id/eprint/55826/1/Sundell%20et%20al.pdf https://doi.org/10.1016/j.epsl.2022.117426 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://oceanrep.geomar.de/id/eprint/55826/1/Sundell%20et%20al.pdf Sundell, K. E. and Macdonald, F. A. (2022) The tectonic context of hafnium isotopes in zircon. Earth and Planetary Science Letters, 584 . Art.Nr. 117426. DOI 10.1016/j.epsl.2022.117426 <https://doi.org/10.1016/j.epsl.2022.117426>. doi:10.1016/j.epsl.2022.117426 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2022.117426 |
container_title |
Earth and Planetary Science Letters |
container_volume |
584 |
container_start_page |
117426 |
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1790594570576199680 |