Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile
[EN]The oxidation of pyrite involves a series of chemical reactions that, depending on climatic conditions, can give rise to different mineral phases and morphologies. When oxidation takes place in semi-arid climate, the development of efflorescent salts on the surface of mine tailings is characteri...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Salamanca (USAL) |
| Repositorio: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/169537 |
| Acceso en línea: | http://hdl.handle.net/10366/169537 |
| Access Level: | acceso abierto |
| Palabra clave: | Salt efflorescence Tailings Metal storage Acid mine drainage Minerals Geology 2506.10 Yacimientos Minerales 2506.11 Mineralogía 5312.09 Minería 5902.08 Política del Medio Ambiente 3308 Ingeniería y Tecnología del Medio Ambiente 3308.11 Control de la Contaminación del Agua minerales geología |
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Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern ChileGerding, JavieraMorales Sánchez Migallón, JuanNovoselov, Alexey A.Barrios Sánchez, SantosSalt efflorescenceTailings Metal storageAcid mine drainageMineralsGeology2506.10 Yacimientos Minerales2506.11 Mineralogía5312.09 Minería5902.08 Política del Medio Ambiente3308 Ingeniería y Tecnología del Medio Ambiente3308.11 Control de la Contaminación del Aguamineralesgeología[EN]The oxidation of pyrite involves a series of chemical reactions that, depending on climatic conditions, can give rise to different mineral phases and morphologies. When oxidation takes place in semi-arid climate, the development of efflorescent salts on the surface of mine tailings is characteristic. These salts are mainly composed of Fe, Al and Mg sulfates and may accumulate valuable metals liberated through the dissolution of tailing minerals. This research aims to describe the evolution of salt precipitation from the economic and environmental perspective. For this purpose, we sampled efflorescent salts formed during the summer season on the surface of a tailing impoundment located in the north of Chile. The materials underwent comprehensive characterization utilizing X-ray techniques and scanning electron microscopy. The findings reveal a fractional precipitation in the crystallized salts. In an advanced oxidation system, characterized by multiple seasons of crystallization, dissolution and oxidation, the dry season begins with the precipitation of sulfates from a highly acidic solution dominated by Fe3+. This solution results from the dissolution and oxidation of the previous season sulfates. This initial stage is characterized by the presence of jarosite and gypsum, which are subsequently replaced by ferricopiapite. Towards the progress of the dry season, copiapite becomes more magnesian and precipitates alongside coquimbite and alunogen. Finally, halotrichite and pickeringite begin to crystallize. Base metal cations such as Co, Cu, Mn, Ni and Zn are preferentially incorporated into halotrichite-pickeringite sulfates during the most advanced evaporation phase.Agencia Nacional de Investigación y Desarrollo (ANID), Fondo Nacional de Desarrollo Científico and Tecnol´ogico, Project FONDECYT INICIACION N◦11241237.Elsevier202620262024info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionapplication/pdfhttp://hdl.handle.net/10366/169537reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésFONDECYT INICIACION N◦11241237Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1695372026-06-07T06:28:51Z |
| dc.title.none.fl_str_mv |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| title |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| spellingShingle |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile Gerding, Javiera Salt efflorescence Tailings Metal storage Acid mine drainage Minerals Geology 2506.10 Yacimientos Minerales 2506.11 Mineralogía 5312.09 Minería 5902.08 Política del Medio Ambiente 3308 Ingeniería y Tecnología del Medio Ambiente 3308.11 Control de la Contaminación del Agua minerales geología |
| title_short |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| title_full |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| title_fullStr |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| title_full_unstemmed |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| title_sort |
Fractional precipitation of copiapite-halotrichite efflorescent salts on Au–Cu mine tailings under semi-arid climates in northern Chile |
| dc.creator.none.fl_str_mv |
Gerding, Javiera Morales Sánchez Migallón, Juan Novoselov, Alexey A. Barrios Sánchez, Santos |
| author |
Gerding, Javiera |
| author_facet |
Gerding, Javiera Morales Sánchez Migallón, Juan Novoselov, Alexey A. Barrios Sánchez, Santos |
| author_role |
author |
| author2 |
Morales Sánchez Migallón, Juan Novoselov, Alexey A. Barrios Sánchez, Santos |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Salt efflorescence Tailings Metal storage Acid mine drainage Minerals Geology 2506.10 Yacimientos Minerales 2506.11 Mineralogía 5312.09 Minería 5902.08 Política del Medio Ambiente 3308 Ingeniería y Tecnología del Medio Ambiente 3308.11 Control de la Contaminación del Agua minerales geología |
| topic |
Salt efflorescence Tailings Metal storage Acid mine drainage Minerals Geology 2506.10 Yacimientos Minerales 2506.11 Mineralogía 5312.09 Minería 5902.08 Política del Medio Ambiente 3308 Ingeniería y Tecnología del Medio Ambiente 3308.11 Control de la Contaminación del Agua minerales geología |
| description |
[EN]The oxidation of pyrite involves a series of chemical reactions that, depending on climatic conditions, can give rise to different mineral phases and morphologies. When oxidation takes place in semi-arid climate, the development of efflorescent salts on the surface of mine tailings is characteristic. These salts are mainly composed of Fe, Al and Mg sulfates and may accumulate valuable metals liberated through the dissolution of tailing minerals. This research aims to describe the evolution of salt precipitation from the economic and environmental perspective. For this purpose, we sampled efflorescent salts formed during the summer season on the surface of a tailing impoundment located in the north of Chile. The materials underwent comprehensive characterization utilizing X-ray techniques and scanning electron microscopy. The findings reveal a fractional precipitation in the crystallized salts. In an advanced oxidation system, characterized by multiple seasons of crystallization, dissolution and oxidation, the dry season begins with the precipitation of sulfates from a highly acidic solution dominated by Fe3+. This solution results from the dissolution and oxidation of the previous season sulfates. This initial stage is characterized by the presence of jarosite and gypsum, which are subsequently replaced by ferricopiapite. Towards the progress of the dry season, copiapite becomes more magnesian and precipitates alongside coquimbite and alunogen. Finally, halotrichite and pickeringite begin to crystallize. Base metal cations such as Co, Cu, Mn, Ni and Zn are preferentially incorporated into halotrichite-pickeringite sulfates during the most advanced evaporation phase. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2026 2026 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion |
| format |
article |
| status_str |
submittedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10366/169537 |
| url |
http://hdl.handle.net/10366/169537 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
FONDECYT INICIACION N◦11241237 |
| dc.rights.none.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier |
| publisher.none.fl_str_mv |
Elsevier |
| dc.source.none.fl_str_mv |
reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca instname:Universidad de Salamanca (USAL) |
| instname_str |
Universidad de Salamanca (USAL) |
| reponame_str |
GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| collection |
GREDOS. Repositorio Institucional de la Universidad de Salamanca |
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1869403766586867712 |
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15,81155 |