Publicação
AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal)
| Resumo: | This work presents the AMD-precipitates from supergenic neoformation in a mine waste-dumps located in the North of Portugal (Penedono mine). The waste dumps resulted from exploitation of gold occurring in quartz veins with sulfides, mainly pyrite and arsenopyrite. As a result, the mine wastes are composed by detrital minerals, mainly quartz, feldspar, micas, and pyrite that coexist with supergenic phases, formed by evolution of the acid mine drainage solutions. Mineral-water interaction lead to neoformation processes, including salinization (formation of soluble salts efflorescences) and crustification, consisting of the layering of crusts of minerals deposited successively. Jarosite, scorodite, and several soluble salts, such as gypsum and rhomboclase were identified as the most abundant precipitates. In addition, mineralogical analyses revealed the abundant occurrence of poorly crystalline iron-oxyhydroxides as well as amorphous nanoprecipitates, mainly composed by iron and arsenic. Mobilization or fixation of toxic elements can be strongly regulated by these neoformation processes. The obtained results indicated that arsenic is retained either by crystalline phases, such as scorodite, or by amorphous iron arsenates. Jarosite also play an important role in controlling mobilization of metals and arsenic by assuring crustification of mine wastes. |
|---|---|
| Autores principais: | Valente, Teresa Maria Fernandes |
| Outros Autores: | Gomes, Patrícia; Santisteban, M.; Torre, M. L. de la; Grande, J. A. |
| Assunto: | AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| Ano: | 2016 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1867438462149328896 |
|---|---|
| author | Valente, Teresa Maria Fernandes |
| author2 | Gomes, Patrícia Santisteban, M. Torre, M. L. de la Grande, J. A. |
| author2_role | author author author author |
| author_facet | Valente, Teresa Maria Fernandes Gomes, Patrícia Santisteban, M. Torre, M. L. de la Grande, J. A. |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Valente, Teresa Maria Fernandes\"},{\"Person.name\":\"Gomes, Patrícia\"},{\"Person.name\":\"Santisteban, M.\"},{\"Person.name\":\"Torre, M. L. de la\"},{\"Person.name\":\"Grande, J. A.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Valente, Teresa Maria Fernandes Gomes, Patrícia Santisteban, M. Torre, M. L. de la Grande, J. A. |
| datacite.date.Accepted.fl_str_mv | 2016-09-01T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| datacite.titles.title.fl_str_mv | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) Precipitados de drenaje ácido de mina en un ambiente rico en arsénico: el caso de la escombrera de Penedono (N Portugal) |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Valente, Teresa Maria Fernandes Gomes, Patrícia Santisteban, M. Torre, M. L. de la Grande, J. A. |
| dc.date.Accepted.fl_str_mv | 2016-09-01T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/50449 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Sociedad Geológica de España |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| dc.title.fl_str_mv | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) Precipitados de drenaje ácido de mina en un ambiente rico en arsénico: el caso de la escombrera de Penedono (N Portugal) |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_5794 |
| description | This work presents the AMD-precipitates from supergenic neoformation in a mine waste-dumps located in the North of Portugal (Penedono mine). The waste dumps resulted from exploitation of gold occurring in quartz veins with sulfides, mainly pyrite and arsenopyrite. As a result, the mine wastes are composed by detrital minerals, mainly quartz, feldspar, micas, and pyrite that coexist with supergenic phases, formed by evolution of the acid mine drainage solutions. Mineral-water interaction lead to neoformation processes, including salinization (formation of soluble salts efflorescences) and crustification, consisting of the layering of crusts of minerals deposited successively. Jarosite, scorodite, and several soluble salts, such as gypsum and rhomboclase were identified as the most abundant precipitates. In addition, mineralogical analyses revealed the abundant occurrence of poorly crystalline iron-oxyhydroxides as well as amorphous nanoprecipitates, mainly composed by iron and arsenic. Mobilization or fixation of toxic elements can be strongly regulated by these neoformation processes. The obtained results indicated that arsenic is retained either by crystalline phases, such as scorodite, or by amorphous iron arsenates. Jarosite also play an important role in controlling mobilization of metals and arsenic by assuring crustification of mine wastes. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | conferencePaper |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/f584d18f-895f-4196-bda0-0c609065a2c6/download |
| id | rum_37985f7de062ac2c5dbe3b6de1d4bbbf |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/50449 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/50449 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Valente, Teresa Maria Fernandes Gomes, Patrícia Santisteban, M. Torre, M. L. de la Grande, J. A. |
| publishDate | 2016 |
| publisher.none.fl_str_mv | Sociedad Geológica de España |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engSociedad Geológica de EspañaporThis work presents the AMD-precipitates from supergenic neoformation in a mine waste-dumps located in the North of Portugal (Penedono mine). The waste dumps resulted from exploitation of gold occurring in quartz veins with sulfides, mainly pyrite and arsenopyrite. As a result, the mine wastes are composed by detrital minerals, mainly quartz, feldspar, micas, and pyrite that coexist with supergenic phases, formed by evolution of the acid mine drainage solutions. Mineral-water interaction lead to neoformation processes, including salinization (formation of soluble salts efflorescences) and crustification, consisting of the layering of crusts of minerals deposited successively. Jarosite, scorodite, and several soluble salts, such as gypsum and rhomboclase were identified as the most abundant precipitates. In addition, mineralogical analyses revealed the abundant occurrence of poorly crystalline iron-oxyhydroxides as well as amorphous nanoprecipitates, mainly composed by iron and arsenic. Mobilization or fixation of toxic elements can be strongly regulated by these neoformation processes. The obtained results indicated that arsenic is retained either by crystalline phases, such as scorodite, or by amorphous iron arsenates. Jarosite also play an important role in controlling mobilization of metals and arsenic by assuring crustification of mine wastes.application/pdfporAMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal)AlternativeTitleporPrecipitados de drenaje ácido de mina en un ambiente rico en arsénico: el caso de la escombrera de Penedono (N Portugal)Valente, Teresa Maria FernandesGomes, PatríciaSantisteban, M.Torre, M. L. de laGrande, J. A.HostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.pt2016-092016-09-01T00:00:00ZHandlehttps://hdl.handle.net/1822/50449http://purl.org/coar/access_right/c_16ecrestricted accessAMD-precipitatesscoroditejarositePenedonoPortugalPrecipitados-AMDscorodita460294 bytesother research producthttp://purl.org/coar/resource_type/c_5794conference paperhttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://repositorium.uminho.pt/bitstreams/f584d18f-895f-4196-bda0-0c609065a2c6/download |
| spellingShingle | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) Valente, Teresa Maria Fernandes AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| status | SINGLETON |
| subject.fl_str_mv | AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| title | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) |
| title_full | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) |
| title_fullStr | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) |
| title_full_unstemmed | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) |
| title_short | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) |
| title_sort | AMD-precipitates formed in an arsenic-rich environment: the case of the Penedono mine waste-dumps (N Portugal) |
| topic | AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| topic_facet | AMD-precipitates scorodite jarosite Penedono Portugal Precipitados-AMD scorodita |
| url | https://hdl.handle.net/1822/50449 |
| visible | 1 |