Seawater signatures in the supracrustal Lewisian Complex, Scotland
Marble in the supracrustal rocks of the Lewisian Complex, Tiree, includes chlorine-bearing amphiboles, chlorine-rich apatite, sulphur-rich scapolite, albite and phlogopite, all of which are regarded as evidence for evaporites in other metamorphosed sequences. Titanite yields U-Pb ages of ∼1.6 Ga, i....
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Cambridge University Press
2022
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ftulundlup:oai:lup.lub.lu.se:d2d33381-2955-4e39-b1d5-257a21c6e1a6 2023-05-15T17:31:26+02:00 Seawater signatures in the supracrustal Lewisian Complex, Scotland Parnell, J. Boyce, A. J. Næraa, T. 2022-09-02 https://lup.lub.lu.se/record/d2d33381-2955-4e39-b1d5-257a21c6e1a6 https://doi.org/10.1017/S0016756822000474 eng eng Cambridge University Press https://lup.lub.lu.se/record/d2d33381-2955-4e39-b1d5-257a21c6e1a6 http://dx.doi.org/10.1017/S0016756822000474 scopus:85138264993 Geological Magazine; 159(9), pp 1638-1646 (2022) ISSN: 0016-7568 Geology evaporites Lewisian marble Palaeoproterozoic scapolite Scotland Tiree titanite contributiontojournal/article info:eu-repo/semantics/article text 2022 ftulundlup https://doi.org/10.1017/S0016756822000474 2023-02-01T23:39:29Z Marble in the supracrustal rocks of the Lewisian Complex, Tiree, includes chlorine-bearing amphiboles, chlorine-rich apatite, sulphur-rich scapolite, albite and phlogopite, all of which are regarded as evidence for evaporites in other metamorphosed sequences. Titanite yields U-Pb ages of ∼1.6 Ga, i.e. late Laxfordian, which excludes a younger imprint of sodium metasomatism. Traces of anhydrite, and isotopically heavy pyrite, also indicate deposition from seawater. Elsewhere in the Hebrides, tourmaline in Lewisian Complex marbles may represent seafloor exhalative deposits. Combined, the evidence suggests Lewisian Complex supracrustal marbles formed in an evaporative environment, like other Palaeoproterozoic successions across the North Atlantic region. Article in Journal/Newspaper North Atlantic Lund University Publications (LUP) Geological Magazine 159 9 1638 1646 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology evaporites Lewisian marble Palaeoproterozoic scapolite Scotland Tiree titanite |
spellingShingle |
Geology evaporites Lewisian marble Palaeoproterozoic scapolite Scotland Tiree titanite Parnell, J. Boyce, A. J. Næraa, T. Seawater signatures in the supracrustal Lewisian Complex, Scotland |
topic_facet |
Geology evaporites Lewisian marble Palaeoproterozoic scapolite Scotland Tiree titanite |
description |
Marble in the supracrustal rocks of the Lewisian Complex, Tiree, includes chlorine-bearing amphiboles, chlorine-rich apatite, sulphur-rich scapolite, albite and phlogopite, all of which are regarded as evidence for evaporites in other metamorphosed sequences. Titanite yields U-Pb ages of ∼1.6 Ga, i.e. late Laxfordian, which excludes a younger imprint of sodium metasomatism. Traces of anhydrite, and isotopically heavy pyrite, also indicate deposition from seawater. Elsewhere in the Hebrides, tourmaline in Lewisian Complex marbles may represent seafloor exhalative deposits. Combined, the evidence suggests Lewisian Complex supracrustal marbles formed in an evaporative environment, like other Palaeoproterozoic successions across the North Atlantic region. |
format |
Article in Journal/Newspaper |
author |
Parnell, J. Boyce, A. J. Næraa, T. |
author_facet |
Parnell, J. Boyce, A. J. Næraa, T. |
author_sort |
Parnell, J. |
title |
Seawater signatures in the supracrustal Lewisian Complex, Scotland |
title_short |
Seawater signatures in the supracrustal Lewisian Complex, Scotland |
title_full |
Seawater signatures in the supracrustal Lewisian Complex, Scotland |
title_fullStr |
Seawater signatures in the supracrustal Lewisian Complex, Scotland |
title_full_unstemmed |
Seawater signatures in the supracrustal Lewisian Complex, Scotland |
title_sort |
seawater signatures in the supracrustal lewisian complex, scotland |
publisher |
Cambridge University Press |
publishDate |
2022 |
url |
https://lup.lub.lu.se/record/d2d33381-2955-4e39-b1d5-257a21c6e1a6 https://doi.org/10.1017/S0016756822000474 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geological Magazine; 159(9), pp 1638-1646 (2022) ISSN: 0016-7568 |
op_relation |
https://lup.lub.lu.se/record/d2d33381-2955-4e39-b1d5-257a21c6e1a6 http://dx.doi.org/10.1017/S0016756822000474 scopus:85138264993 |
op_doi |
https://doi.org/10.1017/S0016756822000474 |
container_title |
Geological Magazine |
container_volume |
159 |
container_issue |
9 |
container_start_page |
1638 |
op_container_end_page |
1646 |
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1766128977071570944 |