Repository logo
 
Publication

Innovative seismic imaging of volcanogenic massive sulfide deposits, Neves-Corvo, Portugal — Part 2: Surface array

2021-05Journal article Open access
Simple item page
dc.contributor.authorDonoso, George
dc.contributor.authorMALEHMIR, Alireza
dc.contributor.authorBrodic, Bojan
dc.contributor.authorPacheco, Nelson Bruno Monteiro
dc.contributor.authorCarvalho, João
dc.contributor.authorAraújo, Vítor
dc.date.accessioned2022-01-10T16:52:25Z
dc.date.available2023-05-01T00:30:17Z
dc.date.issued2021-05
dc.description.abstractABSTRACT: Seismic methods are an affordable and effective way of studying the subsurface for mineral exploration. With the goal of testing new technologies for mineral exploration in highly challenging mining areas, in early 2019, an innovative seismic survey was conducted at the Neves-Corvo mine, south Portugal. We have focused on the data and results from the surface array data, whereas other work deals with the underground seismic data. The surface seismic survey consisted of two perpendicular 2D profiles positioned above the known world-class tier-1 Lombador deposit. Simultaneously, a survey inside the active underground mine took place, being unique because it included the testing of a prototype system that enabled accurate GPS-time (microsecond accuracy) synchronization inside the mine tunnels, approximately 650 m below the surface profiles. Due to the active mining operations, the surface data are noisy. To handle this, a carefully tailored processing algorithm was developed and applied to enhance reflections in the data, interpreted to originate from lithologic contacts and the Lombador deposit. The results and interpretations from 2D processing were validated taking advantage of the known deposit geometry using 3D exploding reflector modeling and pseudo-3D cross-dip analysis. These analyses suggest that there is an out-of-plane signature of the Lombador deposit on the surface data. Additionally, source points activated in the exploration tunnels and simultaneously recorded on the surface profiles allowed for the creation of a 2D velocity model that was used for migration and time-to-depth conversion, providing a reliable 2D seismic section of the subsurface under the surface profiles. We determine that limited surface coverage 2D surveys and a velocity model derived from the tunnel-to-surface seismic recordings allow for imaging of key subsurface geologic structures and delineating mineral deposits of economic interest.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDonoso et al. 2021, ‘Innovative seismic imaging of volcanogenic massive sulfide deposits, Neves-Corvo, Portugal. Part 2: Surface array’, Geophysics, vol. 86, nº 3, pp. B181-B191. doi:10.1190/geo2020-0336.1pt_PT
dc.identifier.doihttps://doi.org/10.1190/geo2020-0336.1pt_PT
dc.identifier.eissn1942-2156
dc.identifier.issn0016-8033
dc.identifier.urihttp://hdl.handle.net/10400.9/3681
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociety of Exploration Geophysicistspt_PT
dc.relationSmart Exploration project is funding from the European Union’s Horizon 2020 research and innovation program under grant agreement n.º 775971.pt_PT
dc.relation.publisherversionhttps://library.seg.org/doi/10.1190/geo2020-0336.1pt_PT
dc.subjectSeismic imagingpt_PT
dc.subjectSeismic surveypt_PT
dc.subjectNeves-Corvo minept_PT
dc.subjectLombador depositpt_PT
dc.subjectPortugalpt_PT
dc.titleInnovative seismic imaging of volcanogenic massive sulfide deposits, Neves-Corvo, Portugal — Part 2: Surface arraypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceHouston, USApt_PT
oaire.citation.endPageB191pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPageB181pt_PT
oaire.citation.titleGeophysicspt_PT
oaire.citation.volume86pt_PT
person.familyNameDonoso
person.familyNameMALEHMIR
person.familyNameBrodic
person.familyNamePacheco
person.familyNameCarvalho
person.givenNameGeorge
person.givenNameAlireza
person.givenNameBojan
person.givenNameNelson Bruno Monteiro
person.givenNameJoão
person.identifier.ciencia-id1D16-E24A-F4E4
person.identifier.orcid0000-0002-7087-4163
person.identifier.orcid0000-0003-1241-2988
person.identifier.orcid0000-0003-4694-9847
person.identifier.orcid0000-0002-3478-6991
person.identifier.orcid0000-0003-2227-3918
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4e8c5339-2619-4ca1-a734-17ed0da97fbe
relation.isAuthorOfPublication3cce4c3b-a71e-49fc-b9f2-868dbae47386
relation.isAuthorOfPublication847fb120-c164-40d7-bf32-09f9993cefa1
relation.isAuthorOfPublication09c2d03e-04d9-415f-a85c-51001d762f11
relation.isAuthorOfPublication363e9adf-6808-4881-bbe7-41a6fe7da470
relation.isAuthorOfPublication.latestForDiscovery09c2d03e-04d9-415f-a85c-51001d762f11

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
innovative-seismic-imaging-of-volcanogenic-massive-sulfide-deposits-2.pdf
Size:
53.99 KB
Format:
Adobe Portable Document Format
Download

Collections

GF - Artigos em revistas internacionais