On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden
We report a significant new database on the carbon and oxygen isotopic analyses (233 whole-rock, and 43 microcored samples) obtained from sedimentary dolostones in the Kalix Greenstone Belt from the Fennoscandian Shield of Sweden. This characterises the second half of the prominent Palaeoproterozoic...
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ftuglasgow:oai:eprints.gla.ac.uk:40597 2023-05-15T16:13:01+02:00 On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden Melezhik, V.A. Fallick, A. 2010-05 http://eprints.gla.ac.uk/40597/ http://www.elsevier.com/locate/precamres unknown Melezhik, V.A. and Fallick, A. <http://eprints.gla.ac.uk/view/author/1774.html> (2010) On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden. Precambrian Research <http://eprints.gla.ac.uk/view/journal_volume/Precambrian_Research.html>, 179(1-4), pp. 165-190. (doi:10.1016/j.precamres.2010.03.002 <http://dx.doi.org/10.1016/j.precamres.2010.03.002>) GE Environmental Sciences Articles PeerReviewed 2010 ftuglasgow https://doi.org/10.1016/j.precamres.2010.03.002 2021-09-23T22:23:28Z We report a significant new database on the carbon and oxygen isotopic analyses (233 whole-rock, and 43 microcored samples) obtained from sedimentary dolostones in the Kalix Greenstone Belt from the Fennoscandian Shield of Sweden. This characterises the second half of the prominent Palaeoproterozoic Lomagundi-Jatuli positive carbon-isotope excursion. Within a 600 m-thick succession of alternating volcanic, volcaniclastic, siliciclastic and dolomitic rocks from greenschist–epidote-amphibolite metamorphic facies, the least altered dolostone samples show a gentle oscillation between +2‰ and +4‰ throughout stratigraphy with a second-order positive excursion from +4‰ through +8‰, and gradually back again to +4‰ in the c. 150 m-thick unit in the middle and upper parts of the succession. This second-order excursion is superimposed on the general relatively rapid δ13C decline at the second half of the Lomagundi-Jatuli isotopic event and coincides with the transition from a marine-influenced rift to a passive margin setting. If the excursion is global, it would reveal internal fine structure of the Lomagundi-Jatuli isotopic excursion; if not, basinal local factors are the main players. Lithostratigraphic and C-isotope correlation between Kalix and neighbouring Peräpohja Schist Belt successions, 40-km-apart, suggest an incomplete geological record in both successions despite the absence of obvious non-depositional unconformities. Article in Journal/Newspaper Fennoscandian University of Glasgow: Enlighten - Publications Kalix ENVELOPE(23.156,23.156,65.853,65.853) Precambrian Research 179 1-4 165 190 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
topic |
GE Environmental Sciences |
spellingShingle |
GE Environmental Sciences Melezhik, V.A. Fallick, A. On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden |
topic_facet |
GE Environmental Sciences |
description |
We report a significant new database on the carbon and oxygen isotopic analyses (233 whole-rock, and 43 microcored samples) obtained from sedimentary dolostones in the Kalix Greenstone Belt from the Fennoscandian Shield of Sweden. This characterises the second half of the prominent Palaeoproterozoic Lomagundi-Jatuli positive carbon-isotope excursion. Within a 600 m-thick succession of alternating volcanic, volcaniclastic, siliciclastic and dolomitic rocks from greenschist–epidote-amphibolite metamorphic facies, the least altered dolostone samples show a gentle oscillation between +2‰ and +4‰ throughout stratigraphy with a second-order positive excursion from +4‰ through +8‰, and gradually back again to +4‰ in the c. 150 m-thick unit in the middle and upper parts of the succession. This second-order excursion is superimposed on the general relatively rapid δ13C decline at the second half of the Lomagundi-Jatuli isotopic event and coincides with the transition from a marine-influenced rift to a passive margin setting. If the excursion is global, it would reveal internal fine structure of the Lomagundi-Jatuli isotopic excursion; if not, basinal local factors are the main players. Lithostratigraphic and C-isotope correlation between Kalix and neighbouring Peräpohja Schist Belt successions, 40-km-apart, suggest an incomplete geological record in both successions despite the absence of obvious non-depositional unconformities. |
format |
Article in Journal/Newspaper |
author |
Melezhik, V.A. Fallick, A. |
author_facet |
Melezhik, V.A. Fallick, A. |
author_sort |
Melezhik, V.A. |
title |
On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden |
title_short |
On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden |
title_full |
On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden |
title_fullStr |
On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden |
title_full_unstemmed |
On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden |
title_sort |
on the lomagundi-jatuli carbon isotopic event: the evidence from the kalix greenstone belt, sweden |
publishDate |
2010 |
url |
http://eprints.gla.ac.uk/40597/ http://www.elsevier.com/locate/precamres |
long_lat |
ENVELOPE(23.156,23.156,65.853,65.853) |
geographic |
Kalix |
geographic_facet |
Kalix |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
Melezhik, V.A. and Fallick, A. <http://eprints.gla.ac.uk/view/author/1774.html> (2010) On the Lomagundi-Jatuli carbon isotopic event: the evidence from the Kalix Greenstone Belt, Sweden. Precambrian Research <http://eprints.gla.ac.uk/view/journal_volume/Precambrian_Research.html>, 179(1-4), pp. 165-190. (doi:10.1016/j.precamres.2010.03.002 <http://dx.doi.org/10.1016/j.precamres.2010.03.002>) |
op_doi |
https://doi.org/10.1016/j.precamres.2010.03.002 |
container_title |
Precambrian Research |
container_volume |
179 |
container_issue |
1-4 |
container_start_page |
165 |
op_container_end_page |
190 |
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1765998626665922560 |