U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform
The results of a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating and a Hf isotope study of zircon crystals separated from small eclogite xenoliths found in Devonian kimberlites within the Prypyat horst, Ukraine, have been reported. The studied area is located in t...
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ftmdpi:oai:mdpi.com:/2076-3263/11/12/487/ 2023-08-20T04:06:26+02:00 U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform Leonid Shumlyanskyy Stepan Tsymbal Monika A. Kusiak Simon A. Wilde Alexander A. Nemchin Iryna Tarasko Liudmyla Shumlianska Mandy Hofmann agris 2021-11-25 application/pdf https://doi.org/10.3390/geosciences11120487 EN eng Multidisciplinary Digital Publishing Institute Geochemistry https://dx.doi.org/10.3390/geosciences11120487 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 11; Issue 12; Pages: 487 eclogite xenolith kimberlite zircon U–Pb age Hf isotopes Ukrainian Shield Devonian East European Platform Text 2021 ftmdpi https://doi.org/10.3390/geosciences11120487 2023-08-01T03:21:38Z The results of a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating and a Hf isotope study of zircon crystals separated from small eclogite xenoliths found in Devonian kimberlites within the Prypyat horst, Ukraine, have been reported. The studied area is located in the junction zone between the Sarmatian and Fennoscandian segments of the East European Platform. Four laser ablation sites on two zircon grains yielded Paleoproterozoic U–Pb ages between 1954 ± 24 and 1735 ± 54 Ma. In contrast, three of four Hf sites revealed negative εHf values and Paleoarchean to Mesoarchean model ages, excluding the possibility that the eclogite xenoliths represented segments of a juvenile Paleoproterozoic subducted slab or younger mafic melts crystallized in the subcontinental lithospheric mantle. A single laser ablation Hf spot yielded a positive εHf value (+3) and a Paleoproterozoic model age. Two models for eclogite origin can be proposed. The first foresees the extension of the Archean lower-crustal or lithospheric roots beneath the Sarmatia–Fennoscandia junction zone for over 200 km from the nearest known outcrop of Archean rocks in the Ukrainian Shield. The second model is that the Central Belarus Suture Zone represents a rifted-out fragment of the Kola–Karelian craton that was accreted to Sarmatia before the actual collision of these two segments of Baltica. Text Fennoscandia Fennoscandian karelian MDPI Open Access Publishing Geosciences 11 12 487 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
eclogite xenolith kimberlite zircon U–Pb age Hf isotopes Ukrainian Shield Devonian East European Platform |
spellingShingle |
eclogite xenolith kimberlite zircon U–Pb age Hf isotopes Ukrainian Shield Devonian East European Platform Leonid Shumlyanskyy Stepan Tsymbal Monika A. Kusiak Simon A. Wilde Alexander A. Nemchin Iryna Tarasko Liudmyla Shumlianska Mandy Hofmann U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform |
topic_facet |
eclogite xenolith kimberlite zircon U–Pb age Hf isotopes Ukrainian Shield Devonian East European Platform |
description |
The results of a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating and a Hf isotope study of zircon crystals separated from small eclogite xenoliths found in Devonian kimberlites within the Prypyat horst, Ukraine, have been reported. The studied area is located in the junction zone between the Sarmatian and Fennoscandian segments of the East European Platform. Four laser ablation sites on two zircon grains yielded Paleoproterozoic U–Pb ages between 1954 ± 24 and 1735 ± 54 Ma. In contrast, three of four Hf sites revealed negative εHf values and Paleoarchean to Mesoarchean model ages, excluding the possibility that the eclogite xenoliths represented segments of a juvenile Paleoproterozoic subducted slab or younger mafic melts crystallized in the subcontinental lithospheric mantle. A single laser ablation Hf spot yielded a positive εHf value (+3) and a Paleoproterozoic model age. Two models for eclogite origin can be proposed. The first foresees the extension of the Archean lower-crustal or lithospheric roots beneath the Sarmatia–Fennoscandia junction zone for over 200 km from the nearest known outcrop of Archean rocks in the Ukrainian Shield. The second model is that the Central Belarus Suture Zone represents a rifted-out fragment of the Kola–Karelian craton that was accreted to Sarmatia before the actual collision of these two segments of Baltica. |
format |
Text |
author |
Leonid Shumlyanskyy Stepan Tsymbal Monika A. Kusiak Simon A. Wilde Alexander A. Nemchin Iryna Tarasko Liudmyla Shumlianska Mandy Hofmann |
author_facet |
Leonid Shumlyanskyy Stepan Tsymbal Monika A. Kusiak Simon A. Wilde Alexander A. Nemchin Iryna Tarasko Liudmyla Shumlianska Mandy Hofmann |
author_sort |
Leonid Shumlyanskyy |
title |
U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform |
title_short |
U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform |
title_full |
U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform |
title_fullStr |
U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform |
title_full_unstemmed |
U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite Xenoliths in Devonian Kimberlites: Preliminary Data on the Archaean Roots in the Junction Zone between the Sarmatian and Fennoscandian Segments of the East European Platform |
title_sort |
u-pb age and hf isotope systematics of zircon from eclogite xenoliths in devonian kimberlites: preliminary data on the archaean roots in the junction zone between the sarmatian and fennoscandian segments of the east european platform |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/geosciences11120487 |
op_coverage |
agris |
genre |
Fennoscandia Fennoscandian karelian |
genre_facet |
Fennoscandia Fennoscandian karelian |
op_source |
Geosciences; Volume 11; Issue 12; Pages: 487 |
op_relation |
Geochemistry https://dx.doi.org/10.3390/geosciences11120487 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/geosciences11120487 |
container_title |
Geosciences |
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11 |
container_issue |
12 |
container_start_page |
487 |
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1774717467044610048 |