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Orange Pickeringite from the Algares 30-Level Adit, Aljustrel Mine, Iberian Pyrite Belt, Portugal

2021-10Journal article Open access
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dc.contributor.authorSilva, Teresa
dc.contributor.authorMatos, João Xavier
dc.contributor.authorDe Oliveira, Daniel Pipa Soares
dc.contributor.authorMorais, Igor
dc.contributor.authorGonçalves, Pedro
dc.contributor.authorAlbardeiro, Luís
dc.contributor.authorCarvalho, Fernanda
dc.contributor.authorMenda, Ugur Deneb
dc.contributor.authorVeiga, JP
dc.date.accessioned2022-01-18T12:30:53Z
dc.date.available2022-01-18T12:30:53Z
dc.date.issued2021-10
dc.description.abstractABSTRACT: The sheltered environment of the Algares +30 level adit (underground mine gallery) contributes to the preservation of secondary water-soluble minerals formed on the tunnel walls. The massive sulphide and related stockwork zone are hosted by the Mine Tuff volcanic unit and are exposed in the walls of the gallery, showing intense oxidation and hydrothermal alteration. Minerals from the halotrichite group were identified on the efflorescent salts, typically white fine-acicular crystals but also on aggregates with dark orange/brownish colour. Mineral characterization was performed using several methods and analytical techniques (XRD, XRF-WDS, SEM-EDS, DTA-TG), and the chemical formulas were calculated maintaining the ratio A:B ≅ 1:2 in accordance with the general formula of the halotrichite group, AB2(SO4)4·22H2O. This methodology allowed the assignment of the orange colour to the presence of trivalent iron on iron-rich pickeringite in partial substitution of aluminium.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSilva et al. 2021, ‘Orange Pickeringite from the Algares 30-level adit, Aljustrel mine, Iberian Pyrite Belt, Portugal’. Minerals, vol. 11, n.º 10, 1115. doi:10.3390/min11101115pt_PT
dc.identifier.doihttps://doi.org/10.3390/min11101115pt_PT
dc.identifier.eissn2075-163X
dc.identifier.issn2075-163X
dc.identifier.urihttp://hdl.handle.net/10400.9/3703
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationFEDER (Fundo Europeu de Desenvolvimento Regional)/INTERREG POCTEP GEO-FPI - (Ref. 0052-GEO-FPI-5-E).pt_PT
dc.relationEXPLORA, Op ALT20-03-0145-FEDER-000025.pt_PT
dc.relationAlentejo 2020, Portugal 2020 and the European Union (ERDF) is acknowledged.pt_PT
dc.relationJ.P. Veiga acknowledges FEDER funds through the COMPETE 2020 Programme and National Funds through the FCT-Portuguese Foundation for Science and Technology under the project UID/CTM/50025/2019, and SFRH/BD/145308/2019 (F.Carvalho) plus UIDP/50025/2020 (U.D. Menda), and funding from the European Institute of Innovation and Technology (EIT), a body of the European Union, under Horizon 2020, the EU Framework Programme for Research and Innovation, through the MineHeritage Project (PA 18111).pt_PT
dc.relation.publisherversionhttps://www.mdpi.com/2075-163X/11/10/1115pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectOrange Pickeringitept_PT
dc.subjectAlotrichitept_PT
dc.subjectEfflorescent mineralspt_PT
dc.subjectUnderground miningpt_PT
dc.subjectAlgares minept_PT
dc.subjectIberian Pyrite Belt sulphide orespt_PT
dc.titleOrange Pickeringite from the Algares 30-Level Adit, Aljustrel Mine, Iberian Pyrite Belt, Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceBasel, Switzerlandpt_PT
oaire.citation.issue10pt_PT
oaire.citation.titleMineralspt_PT
oaire.citation.volume11pt_PT
person.familyNameSilva
person.familyNameXavier Matos
person.familyNamede Oliveira
person.familyNameMorais
person.familyNameGonçalves
person.familyNameAlbardeiro
person.familyNameCarvalho
person.familyNameMenda
person.familyNameVeiga
person.givenNameTeresa
person.givenNameJoão Manuel
person.givenNameDaniel Pipa Soares
person.givenNameIgor
person.givenNamePedro
person.givenNameLuís
person.givenNameFernanda
person.givenNameUgur Deneb
person.givenNameJoão Pedro
person.identifier2216267
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person.identifier.ciencia-id2818-A4AD-3157
person.identifier.ciencia-idFD13-A02C-F7D6
person.identifier.ciencia-idD81C-9EE7-8B61
person.identifier.orcid0000-0002-0306-1015
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person.identifier.orcid0000-0002-6338-8845
person.identifier.orcid0000-0001-9806-7139
person.identifier.orcid0000-0002-6556-6086
person.identifier.orcid0000-0002-3826-260X
person.identifier.orcid0000-0002-3627-5060
person.identifier.orcid0000-0002-7733-8929
person.identifier.orcid0000-0001-5324-1586
person.identifier.ridL-9359-2013
person.identifier.ridJ-3681-2013
person.identifier.scopus-author-id55634591000
person.identifier.scopus-author-id7005146574
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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