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3D Constrained Gravity Inversion and TEM, Seismic Reflection and Drill-Hole Analysis for New Target Generation in the Neves-Corvo VMS Mine Region, Iberian Pyrite Belt

2022-06Journal article Open access
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dc.contributor.authorMarques, Fábio
dc.contributor.authorDias, Pedro
dc.contributor.authorCarvalho, João
dc.contributor.authorRepresas, Patricia
dc.contributor.authorSpicer, Bill
dc.contributor.authorAraújo, Vítor
dc.contributor.authorMatos, João Xavier
dc.contributor.authorMorais, Igor
dc.contributor.authorAlbardeiro, Luís
dc.contributor.authorSousa, Pedro
dc.contributor.authorPacheco, Nelson
dc.contributor.authorGonçalves, Pedro
dc.contributor.authorBarbosa, Diego
dc.date.accessioned2022-08-03T14:21:10Z
dc.date.available2022-08-03T14:21:10Z
dc.date.issued2022-06
dc.description.abstractABSTRACT: Located in the Iberian pyrite belt, the Neves-Corvo mine is a world-class massive sulfide deposit and the largest operating mine in Portugal with underground mining down to 1000 m depth focused on massive and stockwork Cu, Zn, Pb rich ores. Gravimetric data have had a leading role in the discovery of the seven known deposits, together with time-domain electromagnetic (TEM) ground data. In this work, we present the results of a 3D constrained gravity inversion carried out with legacy ground gravity data. The 3D gravity inversions were carried out using an updated density database containing approximately 142,000 measurements. A recently constructed 3D geological model based on reprocessed 2D seismic reflection, 3D seismic, TEM and updated geology from detailed surface mapping and drill-hole data, was used to constrain the inversions. The results show multiple high-density anomalies that may indicate the presence of mineralization at depth. These anomalies were therefore cross-checked with holes previously drilled. Approximately 97% of more than 1000 available surface drill-holes located on or at a distance of less than 200 m from the high-density anomalies intersected mineralization. However, gravity anomalies have been drilled in the past and particularly dense black shales or rhyolitic/gabbroic rocks have been intersected. To increase the success of future drilling, gravimetric anomalies have been correlated spatially with high-conductivity TEM zones and strong-amplitude seismic reflections, because igneous rocks usually present weak-to-moderate conductivity and a massive column of black shales presents a seismic signature quite different from that of mineralization. We concluded that some of these locations represent high-quality targets to consider following up with drilling and further exploration.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMarques, Fábio... [et.al.] - 3D Constrained Gravity Inversion and TEM, Seismic Reflection and Drill-Hole Analysis for New Target Generation in the Neves-Corvo VMS Mine Region, Iberian Pyrite Belt. In: Natural Resources Research, 2022, Early Accesspt_PT
dc.identifier.doi10.1007/s11053-022-10081-4pt_PT
dc.identifier.eissn1573-8981
dc.identifier.issn1520-7439
dc.identifier.urihttp://hdl.handle.net/10400.9/3895
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationEXPLORA/Alentejo2020 (Op ALT20-03-0145-FEDER-000025)pt_PT
dc.relationSustainable mineral resources by utilizing new Exploration technologies
dc.relation.publisherversionhttps://doi.org/10.1007/s11053-022-10081-4pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectIberian Pyrite Beltpt_PT
dc.subjectNeves-Corvo minept_PT
dc.subject3D geological modellingpt_PT
dc.subjectDrill-holespt_PT
dc.subjectTime-domain electromagnetic datapt_PT
dc.subjectSeismic refection datapt_PT
dc.title3D Constrained Gravity Inversion and TEM, Seismic Reflection and Drill-Hole Analysis for New Target Generation in the Neves-Corvo VMS Mine Region, Iberian Pyrite Beltpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSustainable mineral resources by utilizing new Exploration technologies
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/775971/EU
oaire.citation.titleNatural Resources Researchpt_PT
oaire.fundingStreamH2020
person.familyNameMarques
person.familyNameCarvalho
person.familyNameRepresas
person.familyNameXavier Matos
person.familyNameMorais
person.familyNameAlbardeiro
person.familyNamePacheco
person.familyNameGonçalves
person.givenNameFábio
person.givenNameJoão
person.givenNamePatricia
person.givenNameJoão Manuel
person.givenNameIgor
person.givenNameLuís
person.givenNameNelson
person.givenNamePedro
person.identifierA-8080-2008
person.identifier.ciencia-idB514-EE2B-870D
person.identifier.ciencia-id1D16-E24A-F4E4
person.identifier.ciencia-id901F-FDE9-581F
person.identifier.ciencia-idFE16-BE78-D4EA
person.identifier.ciencia-idB81A-A94B-E72A
person.identifier.ciencia-idCC13-E59F-611B
person.identifier.orcid0000-0002-4278-8348
person.identifier.orcid0000-0003-2227-3918
person.identifier.orcid0000-0002-2987-2836
person.identifier.orcid0000-0002-6108-1030
person.identifier.orcid0000-0001-9806-7139
person.identifier.orcid0000-0002-3826-260X
person.identifier.orcid0000-0002-2109-8006
person.identifier.orcid0000-0002-6556-6086
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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