Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard
The fieldwork and subsequent analyses were funded by Natural Environment Research Council grant GR3/NE/H004963/1 within project GAINS (Glacial Activity In Neoproterozoic Svalbard). The Marinoan panglaciation (ca 650 to 635 Ma) is represented in north-east Svalbard by the 130 to 175 m thick Wilsonbre...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/10231 2023-07-02T03:33:49+02:00 Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard Fairchild, Ian J. Fleming, Edward J. Bao, Huiming Benn, Douglas I. Boomer, Ian Dublyansky, Yuri V. Halverson, Galen P. Hambrey, Michael J. Hendy, Chris McMillan, Emily A. Spötl, Christoph Stevenson, Carl T. E. Wynn, Peter M. University of St Andrews. Geography & Sustainable Development University of St Andrews. Bell-Edwards Geographic Data Institute 2017-02-04 application/pdf http://hdl.handle.net/10023/10231 https://doi.org/10.1111/sed.12252 eng eng Sedimentology Fairchild , I J , Fleming , E J , Bao , H , Benn , D I , Boomer , I , Dublyansky , Y V , Halverson , G P , Hambrey , M J , Hendy , C , McMillan , E A , Spötl , C , Stevenson , C T E & Wynn , P M 2016 , ' Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard ' , Sedimentology , vol. 63 , no. 2 , pp. 443-497 . https://doi.org/10.1111/sed.12252 1365-3091 PURE: 241163216 PURE UUID: 98dc5e8c-5383-4879-b856-9a061e588f10 Bibtex: urn:9a0f5591f80d99c668c31967436d6375 Scopus: 84957678533 WOS: 000372268900007 ORCID: /0000-0002-3604-0886/work/64697404 http://hdl.handle.net/10023/10231 https://doi.org/10.1111/sed.12252 © 2015 The Authors. Sedimentology © 2015 International Association of Sedimentologists. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1111/sed.12252 Carbon isotopes Cryogenian Ikaite pseudomorphs Lacustrine Oxygen isotopes Snowball Earth DAS SDG 13 - Climate Action Journal article 2017 ftstandrewserep https://doi.org/10.1111/sed.12252 2023-06-13T18:30:32Z The fieldwork and subsequent analyses were funded by Natural Environment Research Council grant GR3/NE/H004963/1 within project GAINS (Glacial Activity In Neoproterozoic Svalbard). The Marinoan panglaciation (ca 650 to 635 Ma) is represented in north-east Svalbard by the 130 to 175 m thick Wilsonbreen Formation which contains syn-glacial carbonates in its upper 100 m. These sediments are now known to have been deposited under a CO2-rich atmosphere, late in the glaciation, and global climate models facilitate testing of proposed analogues. Precipitated carbonates occur in four of the seven facies associations identified: Fluvial Channel (including stromatolitic and intraclastic limestones in ephemeral stream deposits); Dolomitic Floodplain (dolomite-cemented sand and siltstones, and microbial dolomites); Calcareous Lake Margin (intraclastic dolomite and wave-rippled or aeolian siliciclastic facies); and Calcareous Lake (slump-folded and locally re-sedimented rhythmic/stromatolitic limestones and dolomites associated with ice-rafted sediment). There is no strong cyclicity, and modern analogues suggest that sudden changes in lake level may exert a strong control on facies geometry. Both calcite and dolomite in stromatolites and rhythmites display either primary or early diagenetic replacive growth. Oxygen isotope values (−12 to +15‰VPDB) broadly covary with δ13C. High δ13C values of +3·5 to +4·5‰ correspond to equilibration with an atmosphere dominated by volcanically degassed CO2 with δ13C of −6 to −7‰. Limestones have consistently negative δ18O values, while rhythmic and playa dolomites preserve intermediate compositions, and dolocretes possess slightly negative to strongly positive δ18O signatures, reflecting significant evaporation under hyperarid conditions. Inferred meltwater compositions (−8 to −15·5‰) could reflect smaller Rayleigh fractionation related to more limited cooling than in modern polar regions. A common pseudomorph morphology is interpreted as a replacement of ikaite (CaCO3·H2O), which may ... Article in Journal/Newspaper Svalbard University of St Andrews: Digital Research Repository Svalbard Sedimentology 63 2 443 497 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Carbon isotopes Cryogenian Ikaite pseudomorphs Lacustrine Oxygen isotopes Snowball Earth DAS SDG 13 - Climate Action |
spellingShingle |
Carbon isotopes Cryogenian Ikaite pseudomorphs Lacustrine Oxygen isotopes Snowball Earth DAS SDG 13 - Climate Action Fairchild, Ian J. Fleming, Edward J. Bao, Huiming Benn, Douglas I. Boomer, Ian Dublyansky, Yuri V. Halverson, Galen P. Hambrey, Michael J. Hendy, Chris McMillan, Emily A. Spötl, Christoph Stevenson, Carl T. E. Wynn, Peter M. Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard |
topic_facet |
Carbon isotopes Cryogenian Ikaite pseudomorphs Lacustrine Oxygen isotopes Snowball Earth DAS SDG 13 - Climate Action |
description |
The fieldwork and subsequent analyses were funded by Natural Environment Research Council grant GR3/NE/H004963/1 within project GAINS (Glacial Activity In Neoproterozoic Svalbard). The Marinoan panglaciation (ca 650 to 635 Ma) is represented in north-east Svalbard by the 130 to 175 m thick Wilsonbreen Formation which contains syn-glacial carbonates in its upper 100 m. These sediments are now known to have been deposited under a CO2-rich atmosphere, late in the glaciation, and global climate models facilitate testing of proposed analogues. Precipitated carbonates occur in four of the seven facies associations identified: Fluvial Channel (including stromatolitic and intraclastic limestones in ephemeral stream deposits); Dolomitic Floodplain (dolomite-cemented sand and siltstones, and microbial dolomites); Calcareous Lake Margin (intraclastic dolomite and wave-rippled or aeolian siliciclastic facies); and Calcareous Lake (slump-folded and locally re-sedimented rhythmic/stromatolitic limestones and dolomites associated with ice-rafted sediment). There is no strong cyclicity, and modern analogues suggest that sudden changes in lake level may exert a strong control on facies geometry. Both calcite and dolomite in stromatolites and rhythmites display either primary or early diagenetic replacive growth. Oxygen isotope values (−12 to +15‰VPDB) broadly covary with δ13C. High δ13C values of +3·5 to +4·5‰ correspond to equilibration with an atmosphere dominated by volcanically degassed CO2 with δ13C of −6 to −7‰. Limestones have consistently negative δ18O values, while rhythmic and playa dolomites preserve intermediate compositions, and dolocretes possess slightly negative to strongly positive δ18O signatures, reflecting significant evaporation under hyperarid conditions. Inferred meltwater compositions (−8 to −15·5‰) could reflect smaller Rayleigh fractionation related to more limited cooling than in modern polar regions. A common pseudomorph morphology is interpreted as a replacement of ikaite (CaCO3·H2O), which may ... |
author2 |
University of St Andrews. Geography & Sustainable Development University of St Andrews. Bell-Edwards Geographic Data Institute |
format |
Article in Journal/Newspaper |
author |
Fairchild, Ian J. Fleming, Edward J. Bao, Huiming Benn, Douglas I. Boomer, Ian Dublyansky, Yuri V. Halverson, Galen P. Hambrey, Michael J. Hendy, Chris McMillan, Emily A. Spötl, Christoph Stevenson, Carl T. E. Wynn, Peter M. |
author_facet |
Fairchild, Ian J. Fleming, Edward J. Bao, Huiming Benn, Douglas I. Boomer, Ian Dublyansky, Yuri V. Halverson, Galen P. Hambrey, Michael J. Hendy, Chris McMillan, Emily A. Spötl, Christoph Stevenson, Carl T. E. Wynn, Peter M. |
author_sort |
Fairchild, Ian J. |
title |
Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard |
title_short |
Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard |
title_full |
Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard |
title_fullStr |
Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard |
title_full_unstemmed |
Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard |
title_sort |
continental carbonate facies of a neoproterozoic panglaciation, north-east svalbard |
publishDate |
2017 |
url |
http://hdl.handle.net/10023/10231 https://doi.org/10.1111/sed.12252 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_relation |
Sedimentology Fairchild , I J , Fleming , E J , Bao , H , Benn , D I , Boomer , I , Dublyansky , Y V , Halverson , G P , Hambrey , M J , Hendy , C , McMillan , E A , Spötl , C , Stevenson , C T E & Wynn , P M 2016 , ' Continental carbonate facies of a Neoproterozoic panglaciation, north-east Svalbard ' , Sedimentology , vol. 63 , no. 2 , pp. 443-497 . https://doi.org/10.1111/sed.12252 1365-3091 PURE: 241163216 PURE UUID: 98dc5e8c-5383-4879-b856-9a061e588f10 Bibtex: urn:9a0f5591f80d99c668c31967436d6375 Scopus: 84957678533 WOS: 000372268900007 ORCID: /0000-0002-3604-0886/work/64697404 http://hdl.handle.net/10023/10231 https://doi.org/10.1111/sed.12252 |
op_rights |
© 2015 The Authors. Sedimentology © 2015 International Association of Sedimentologists. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1111/sed.12252 |
op_doi |
https://doi.org/10.1111/sed.12252 |
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Sedimentology |
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63 |
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443 |
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