Repositório Digital

A- A A+

How the use of stratigraphic coordinates improves grade estimation

.

How the use of stratigraphic coordinates improves grade estimation

Mostrar registro completo

Estatísticas

Título How the use of stratigraphic coordinates improves grade estimation
Outro título How the use of stratigraphic coordinates improves grade estimation
Autor Hundelshaussen Rubio, Ricardo José
Koppe, Vanessa Cerqueira
Costa, Joao Felipe Coimbra Leite
Cherchenevski, Pablo Koury
Abstract Some 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.
Contido em Rem: revista Escola de Minas. Ouro Preto, MG. Vol. 68, n. 4 (Oct./Dec. 2015), p. 471-477
Assunto Depositos minerais
Estratigrafia
Geoestatistica
Krigagem
[en] Change of coordinates
[en] Grade estimation
[en] Kriging
[en] Stratigraphic coordinates
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/132523
Arquivos Descrição Formato
000981797.pdf (2.037Mb) Texto completo Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.