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dc.contributor.authorHundelshaussen Rubio, Ricardo Josépt_BR
dc.contributor.authorKoppe, Vanessa Cerqueirapt_BR
dc.contributor.authorCosta, Joao Felipe Coimbra Leitept_BR
dc.contributor.authorCherchenevski, Pablo Kourypt_BR
dc.date.accessioned2016-01-29T02:48:10Zpt_BR
dc.date.issued2015pt_BR
dc.identifier.issn1807-0353pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/132523pt_BR
dc.description.abstractSome mineral deposits show mineralization along layers. These layers may pass through several subsequent geological events such as folding and/or severe erosional processes. Grades within these deposits tend to be correlated along orientations where the mineralization was originally deposited or along the same geological period (stratigraphic level). Consequently, some locations close to each other in terms of geographical coordinates can show uncorrelated grades. Spatial continuity analysis can also be affected by error inflicted by combining samples from different stratigraphic levels. This article uses the coordinate transformation (unfolding) to align the grades measured along the same stratigraphic level. The modification in coordinates improved the spatial continuity modeling and the grade estimates at non-sampled locations. The results showed that the mean of the relative error between the estimated value and the real value of the samples using unfolding is -0.10%. However, when using the original coordinates, the mean of the relative error is -0.65%. Furthermore, the correlation between the real and estimated value using crossvalidation is greater using stratigraphic coordinates. A complete case study in a manganese deposit illustrates the methodology.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofRem: revista Escola de Minas. Ouro Preto, MG. Vol. 68, n. 4 (Oct./Dec. 2015), p. 471-477pt_BR
dc.rightsOpen Accessen
dc.subjectDepósitos mineraispt_BR
dc.subjectChange of coordinatesen
dc.subjectStratigraphic coordinatesen
dc.subjectEstratigrafiapt_BR
dc.subjectKrigagempt_BR
dc.subjectGrade estimationen
dc.subjectKrigingen
dc.subjectGeoestatísticapt_BR
dc.titleHow the use of stratigraphic coordinates improves grade estimationpt_BR
dc.title.alternativeHow the use of stratigraphic coordinates improves grade estimation en
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000981797pt_BR
dc.type.originNacionalpt_BR


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