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 det...
Published in: | Comptes Rendus Geoscience |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2018
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/85566/ https://authors.library.caltech.edu/85566/2/1-s2.0-S1631071318300221-main.pdf https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:85566 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:85566 2023-05-15T17:39:51+02:00 Salinity of the Archaean oceans from analysis of fluid inclusions in quartz Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. 2018-05 application/pdf https://authors.library.caltech.edu/85566/ https://authors.library.caltech.edu/85566/2/1-s2.0-S1631071318300221-main.pdf https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688 en eng Elsevier https://authors.library.caltech.edu/85566/2/1-s2.0-S1631071318300221-main.pdf Marty, Bernard and Avice, Guillaume and Bekaert, David V. and Broadley, Michael W. (2018) Salinity of the Archaean oceans from analysis of fluid inclusions in quartz. Comptes Rendus Geoscience, 350 (4). pp. 154-163. ISSN 1631-0713. doi:10.1016/j.crte.2017.12.002. https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688 <https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688> cc_by_nc_nd CC-BY-NC-ND Article PeerReviewed 2018 ftcaltechauth https://doi.org/10.1016/j.crte.2017.12.002 2021-11-18T18:45:25Z 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. Article in Journal/Newspaper North Pole Caltech Authors (California Institute of Technology) North Pole Comptes Rendus Geoscience 350 4 154 163 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. |
spellingShingle |
Marty, Bernard Avice, Guillaume Bekaert, David V. Broadley, Michael W. Salinity of the Archaean oceans from analysis of fluid inclusions in quartz |
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://authors.library.caltech.edu/85566/ https://authors.library.caltech.edu/85566/2/1-s2.0-S1631071318300221-main.pdf https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688 |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
North Pole |
genre_facet |
North Pole |
op_relation |
https://authors.library.caltech.edu/85566/2/1-s2.0-S1631071318300221-main.pdf Marty, Bernard and Avice, Guillaume and Bekaert, David V. and Broadley, Michael W. (2018) Salinity of the Archaean oceans from analysis of fluid inclusions in quartz. Comptes Rendus Geoscience, 350 (4). pp. 154-163. ISSN 1631-0713. doi:10.1016/j.crte.2017.12.002. https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688 <https://resolver.caltech.edu/CaltechAUTHORS:20180402-134647688> |
op_rights |
cc_by_nc_nd |
op_rightsnorm |
CC-BY-NC-ND |
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 |
_version_ |
1766140628010270720 |