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Article: Amphibolite dissolution mechanism under chlorine-rich conditions during freeze-thaw cycles

TitleAmphibolite dissolution mechanism under chlorine-rich conditions during freeze-thaw cycles
Authors
KeywordsAmphibolite
Dissolution
Freeze-thaw cycles
Mg-hornblende
Weathering
Issue Date12-Apr-2023
PublisherElsevier
Citation
Applied Geochemistry, 2023, v. 152 How to Cite?
AbstractThe low-temperature weathering behavior of amphibolite is vital for revealing the cation source of groundwater and for understanding a wide range of geochemical evolution. This study aims to observe the macroscopic and microscopic characteristics of amphibolite dissolution under the freeze-thaw cycles (-25-25 degrees C) and chlorides (HCl, NaCl, KCl). The results show that Mg-hornblende was dissolved in chloride solutions of the same pH or concentration before albite. The change rule of the solution composition of freeze-thaw cycles is consistent with the results obtained from the dissolution experiment at room temperature. In addition, in an HCl solution of pH 1 and NaOH solutions of pH 11, 13, and 14, the dissolved amount of quartz in amphibolite can reach 11 wt %. KCl can powerfully dissolve quartz and efficiently dissolve Si in the silica-oxide tetrahedron (especially the T2 site) of Mg-hornblende. However, NaCl significantly dissolves cations in the Mg-hornblende octahedron. Analysis indicates that the leaching of Ca2+ and Mg2+ in proton-promoted dissolution strongly depended on the concentration of H+. At the same time, the release of Mg is closely related to Cl- . The results can help understand chemical element migration in the earth, especially providing a theoretical basis for groundwater cation in the Qaidam Basin.
Persistent Identifierhttp://hdl.handle.net/10722/340271
ISSN
2023 Impact Factor: 3.1
2023 SCImago Journal Rankings: 0.827
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, YL-
dc.contributor.authorHuang, F-
dc.contributor.authorGao, WY-
dc.contributor.authorLi, MY-
dc.contributor.authorJia, P-
dc.contributor.authorLiu, JC-
dc.contributor.authorZhu, Q-
dc.date.accessioned2024-03-11T10:42:55Z-
dc.date.available2024-03-11T10:42:55Z-
dc.date.issued2023-04-12-
dc.identifier.citationApplied Geochemistry, 2023, v. 152-
dc.identifier.issn0883-2927-
dc.identifier.urihttp://hdl.handle.net/10722/340271-
dc.description.abstractThe low-temperature weathering behavior of amphibolite is vital for revealing the cation source of groundwater and for understanding a wide range of geochemical evolution. This study aims to observe the macroscopic and microscopic characteristics of amphibolite dissolution under the freeze-thaw cycles (-25-25 degrees C) and chlorides (HCl, NaCl, KCl). The results show that Mg-hornblende was dissolved in chloride solutions of the same pH or concentration before albite. The change rule of the solution composition of freeze-thaw cycles is consistent with the results obtained from the dissolution experiment at room temperature. In addition, in an HCl solution of pH 1 and NaOH solutions of pH 11, 13, and 14, the dissolved amount of quartz in amphibolite can reach 11 wt %. KCl can powerfully dissolve quartz and efficiently dissolve Si in the silica-oxide tetrahedron (especially the T2 site) of Mg-hornblende. However, NaCl significantly dissolves cations in the Mg-hornblende octahedron. Analysis indicates that the leaching of Ca2+ and Mg2+ in proton-promoted dissolution strongly depended on the concentration of H+. At the same time, the release of Mg is closely related to Cl- . The results can help understand chemical element migration in the earth, especially providing a theoretical basis for groundwater cation in the Qaidam Basin.-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofApplied Geochemistry-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectAmphibolite-
dc.subjectDissolution-
dc.subjectFreeze-thaw cycles-
dc.subjectMg-hornblende-
dc.subjectWeathering-
dc.titleAmphibolite dissolution mechanism under chlorine-rich conditions during freeze-thaw cycles-
dc.typeArticle-
dc.identifier.doi10.1016/j.apgeochem.2023.105659-
dc.identifier.scopuseid_2-s2.0-85152143915-
dc.identifier.volume152-
dc.identifier.isiWOS:000981113600001-
dc.publisher.placeOXFORD-
dc.identifier.issnl0883-2927-

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