Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping
Various analytical techniques have been developed to determine the solution composition of fluid inclusions, including destructive, non-destructive, single-inclusion, and bulk-inclusion methods. Cryogenic Raman spectroscopy, as a non-destructive and single-inclusion method, has emerged as a potentia...
Published in: | Minerals |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2020
|
Subjects: | |
Online Access: | https://doi.org/10.3390/min10111043 |
id |
ftmdpi:oai:mdpi.com:/2075-163X/10/11/1043/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2075-163X/10/11/1043/ 2023-08-20T04:01:58+02:00 Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping Haixia Chu Guoxiang Chi Chunji Xue agris 2020-11-23 application/pdf https://doi.org/10.3390/min10111043 EN eng Multidisciplinary Digital Publishing Institute Mineral Deposits https://dx.doi.org/10.3390/min10111043 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 10; Issue 11; Pages: 1043 H 2 O-NaCl-CaCl 2 cryogenic Raman spectroscopy 2D mapping fused silica capillary glass-sandwiched solution film Text 2020 ftmdpi https://doi.org/10.3390/min10111043 2023-08-01T00:31:04Z Various analytical techniques have been developed to determine the solution composition of fluid inclusions, including destructive, non-destructive, single-inclusion, and bulk-inclusion methods. Cryogenic Raman spectroscopy, as a non-destructive and single-inclusion method, has emerged as a potentially powerful tool of quantitative analysis of fluid inclusion composition. A method of point analysis using cryogenic Raman spectroscopy has been previously proposed to quantitatively estimate the solute composition of H2O-NaCl-CaCl2 solutions, but there are uncertainties related to heterogeneity of frozen fluid inclusions and potential bias in the processing of Raman spectra. A new method of quantitative analysis of solute composition of H2O-NaCl-CaCl2 solutions using Raman mapping technology is proposed in this study, which can overcome the problems encountered in the point analysis. It is shown that the NaCl/(NaCl + CaCl2) molar ratio of the solution, X(NaCl, m), can be related to the area fraction of hydrohalite over hydrohalite plus antarcticite, Fhydrohalite, by the equation X(NaCl, m) = 1.1435 Fhydrohalite − 0.0884, where Fhydrohalite = hydrohalite area/(hydrohalite area + antarcticite area). This equation suggests that the molar fraction of a salt component may be estimated from the fraction of the Raman peak area of the relevant hydrate. This study has established a new way of estimating solute composition of fluid inclusions using cryogenic Raman mapping technique, which may be extended to other solutions. Text Antarc* MDPI Open Access Publishing Minerals 10 11 1043 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
H 2 O-NaCl-CaCl 2 cryogenic Raman spectroscopy 2D mapping fused silica capillary glass-sandwiched solution film |
spellingShingle |
H 2 O-NaCl-CaCl 2 cryogenic Raman spectroscopy 2D mapping fused silica capillary glass-sandwiched solution film Haixia Chu Guoxiang Chi Chunji Xue Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping |
topic_facet |
H 2 O-NaCl-CaCl 2 cryogenic Raman spectroscopy 2D mapping fused silica capillary glass-sandwiched solution film |
description |
Various analytical techniques have been developed to determine the solution composition of fluid inclusions, including destructive, non-destructive, single-inclusion, and bulk-inclusion methods. Cryogenic Raman spectroscopy, as a non-destructive and single-inclusion method, has emerged as a potentially powerful tool of quantitative analysis of fluid inclusion composition. A method of point analysis using cryogenic Raman spectroscopy has been previously proposed to quantitatively estimate the solute composition of H2O-NaCl-CaCl2 solutions, but there are uncertainties related to heterogeneity of frozen fluid inclusions and potential bias in the processing of Raman spectra. A new method of quantitative analysis of solute composition of H2O-NaCl-CaCl2 solutions using Raman mapping technology is proposed in this study, which can overcome the problems encountered in the point analysis. It is shown that the NaCl/(NaCl + CaCl2) molar ratio of the solution, X(NaCl, m), can be related to the area fraction of hydrohalite over hydrohalite plus antarcticite, Fhydrohalite, by the equation X(NaCl, m) = 1.1435 Fhydrohalite − 0.0884, where Fhydrohalite = hydrohalite area/(hydrohalite area + antarcticite area). This equation suggests that the molar fraction of a salt component may be estimated from the fraction of the Raman peak area of the relevant hydrate. This study has established a new way of estimating solute composition of fluid inclusions using cryogenic Raman mapping technique, which may be extended to other solutions. |
format |
Text |
author |
Haixia Chu Guoxiang Chi Chunji Xue |
author_facet |
Haixia Chu Guoxiang Chi Chunji Xue |
author_sort |
Haixia Chu |
title |
Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping |
title_short |
Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping |
title_full |
Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping |
title_fullStr |
Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping |
title_full_unstemmed |
Quantification of Solute Composition in H2O-NaCl-CaCl2 Solutions Using Cryogenic 2D Raman Mapping |
title_sort |
quantification of solute composition in h2o-nacl-cacl2 solutions using cryogenic 2d raman mapping |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/min10111043 |
op_coverage |
agris |
genre |
Antarc* |
genre_facet |
Antarc* |
op_source |
Minerals; Volume 10; Issue 11; Pages: 1043 |
op_relation |
Mineral Deposits https://dx.doi.org/10.3390/min10111043 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min10111043 |
container_title |
Minerals |
container_volume |
10 |
container_issue |
11 |
container_start_page |
1043 |
_version_ |
1774712358037356544 |