Salinity of the Archaean oceans from analysis of fluid inclusions in quartz
Fluids trapped in inclusions in well-characterized Archaean hydrothermal quartz crystals were analyzed by the extended argon–argon method, which permits the simultaneous measurement of chlorine and potassium concentrations. Argon and nitrogen isotopic compositions of the trapped fluids were also d...
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ftcaltechauth:oai:authors.library.caltech.edu:mxxvm-s7141 2024-09-09T19:58:41+00:00 Salinity of the Archaean oceans from analysis of fluid inclusions in quartz Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. 2018-05 https://doi.org/10.1016/j.crte.2017.12.002 unknown Elsevier https://doi.org/10.1016/j.crte.2017.12.002 oai:authors.library.caltech.edu:mxxvm-s7141 eprintid:85566 resolverid:CaltechAUTHORS:20180402-134647688 info:eu-repo/semantics/openAccess Other Comptes Rendus Geoscience, 350(4), 154-163, (2018-05) Salinity Archean oceans Noble gases info:eu-repo/semantics/article 2018 ftcaltechauth https://doi.org/10.1016/j.crte.2017.12.002 2024-08-06T15:35:00Z Fluids trapped in inclusions in well-characterized Archaean hydrothermal quartz crystals were analyzed by the extended argon–argon method, which permits the simultaneous measurement of chlorine and potassium concentrations. Argon and nitrogen isotopic compositions of the trapped fluids were also determined by static mass spectrometry. Fluids were extracted by stepwise crushing of quartz samples from North Pole (NW Australia) and Barberton (South Africa) 3.5–3.0-Ga-old greenstone belts. The data indicate that fluids are a mixture of a low salinity end-member, regarded as the Archaean oceanic water, and several hydrothermal end-members rich in Cl, K, N, and radiogenic parentless ^(40)Ar. The low Cl–K end-member suggests that the salinity of the Archaean oceans was comparable to the modern one, and that the potassium content of the Archaean oceans was lower than at present by about 40%. A constant salinity of the oceans through time has important implications for the stabilization of the continental crust and for the habitability of the ancient Earth. © 2018 Académie des sciences. Published by Elsevier Masson SAS.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Received 27 November 2017, Accepted 12 December 2017, Available online 2 April 2018. This study was funded by the European Research Council (FP/7 2007–2013, grant agreement 267255). Ray Burgess is thanked for mentorship and assistance during Ar–Ar experiments. Samples were made available through collaborations with Pascal Philippot, Axel Hofmann, and Nick Arndt. We are grateful to Mark Kendricks and Romain Tartèse for detailed and constructive comments, and to Marc Chaussidon for edition and suggestions. This is CRPG contribution # 2558. Published - 1-s2.0-S1631071318300221-main.pdf Article in Journal/Newspaper North Pole Caltech Authors (California Institute of Technology) North Pole Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) Hofmann ENVELOPE(160.600,160.600,-82.667,-82.667) Comptes Rendus Geoscience 350 4 154 163 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
Salinity Archean oceans Noble gases |
spellingShingle |
Salinity Archean oceans Noble gases Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
topic_facet |
Salinity Archean oceans Noble gases |
description |
Fluids trapped in inclusions in well-characterized Archaean hydrothermal quartz crystals were analyzed by the extended argon–argon method, which permits the simultaneous measurement of chlorine and potassium concentrations. Argon and nitrogen isotopic compositions of the trapped fluids were also determined by static mass spectrometry. Fluids were extracted by stepwise crushing of quartz samples from North Pole (NW Australia) and Barberton (South Africa) 3.5–3.0-Ga-old greenstone belts. The data indicate that fluids are a mixture of a low salinity end-member, regarded as the Archaean oceanic water, and several hydrothermal end-members rich in Cl, K, N, and radiogenic parentless ^(40)Ar. The low Cl–K end-member suggests that the salinity of the Archaean oceans was comparable to the modern one, and that the potassium content of the Archaean oceans was lower than at present by about 40%. A constant salinity of the oceans through time has important implications for the stabilization of the continental crust and for the habitability of the ancient Earth. © 2018 Académie des sciences. Published by Elsevier Masson SAS.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Received 27 November 2017, Accepted 12 December 2017, Available online 2 April 2018. This study was funded by the European Research Council (FP/7 2007–2013, grant agreement 267255). Ray Burgess is thanked for mentorship and assistance during Ar–Ar experiments. Samples were made available through collaborations with Pascal Philippot, Axel Hofmann, and Nick Arndt. We are grateful to Mark Kendricks and Romain Tartèse for detailed and constructive comments, and to Marc Chaussidon for edition and suggestions. This is CRPG contribution # 2558. Published - 1-s2.0-S1631071318300221-main.pdf |
format |
Article in Journal/Newspaper |
author |
Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. |
author_facet |
Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. |
author_sort |
Marty, Bernard |
title |
Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
title_short |
Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
title_full |
Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
title_fullStr |
Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
title_full_unstemmed |
Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
title_sort |
salinity of the archaean oceans from analysis of fluid inclusions in quartz |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://doi.org/10.1016/j.crte.2017.12.002 |
long_lat |
ENVELOPE(76.128,76.128,-69.415,-69.415) ENVELOPE(160.600,160.600,-82.667,-82.667) |
geographic |
North Pole Burgess Hofmann |
geographic_facet |
North Pole Burgess Hofmann |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
Comptes Rendus Geoscience, 350(4), 154-163, (2018-05) |
op_relation |
https://doi.org/10.1016/j.crte.2017.12.002 oai:authors.library.caltech.edu:mxxvm-s7141 eprintid:85566 resolverid:CaltechAUTHORS:20180402-134647688 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1016/j.crte.2017.12.002 |
container_title |
Comptes Rendus Geoscience |
container_volume |
350 |
container_issue |
4 |
container_start_page |
154 |
op_container_end_page |
163 |
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1809929735503872000 |