Navegação Produção Científica por Assunto "Kriging"

Resultados 1-6 de 6

    • Benefício do adensamento amostral com perfilagem geofísica no planejamento de lavra a curto prazo 

      Oliveira, Leandro José de; Souza, Fabricio Souza de; Costa, Joao Felipe Coimbra Leite; Koppe, Jair Carlos; Salvadoretti, Paulo; Bastiani, Gustavo Antônio; Carvalho Junior, José Adolfo de (2008) [Artigo de periódico]
      Sondagens com amostragem são comumente utilizadas e de extrema importância para o desenvolvimento da pesquisa e do planejamento da lavra. No entanto, esse tipo de informação é cara de ser obtida e, freqüentemente, sondagem ...

    • Field parametric geostatistics : an alternative to tackle gold grade estimations 

      Machado, Rochana da Silva; Costa, Joao Felipe Coimbra Leite (2019) [Artigo de periódico]
      High anomalous grades are very common in gold deposits, whose presence requires careful treatment to prevent overestimation of metal content. Mineral resource analysts have worked on the estimation of several gold deposits, ...

    • How the use of stratigraphic coordinates improves grade estimation 

      Hundelshaussen Rubio, Ricardo José; Koppe, Vanessa Cerqueira; Costa, Joao Felipe Coimbra Leite; Cherchenevski, Pablo Koury (2015) [Artigo de periódico]
      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 ...

    • Improving short-term grade block models: alternative for correcting soft data 

      Araújo, Cristina da Paixão; Costa, Joao Felipe Coimbra Leite; Koppe, Vanessa Cerqueira (2018) [Artigo de periódico]
      Short-term mining planning typically relies on samples obtained from channels or less-accurate sampling methods. The results may include larger sampling errors than those derived from diamond drill hole core samples. The ...

    • Integration of different-quality data in short-term mining planning 

      Araújo, Cristina da Paixão; Costa, Joao Felipe Coimbra Leite (2015) [Artigo de periódico]
      Decisions, from mineral exploration to mining operations, are based on grade block models obtained from samples. This study evaluates the impact of using imprecise data in short-term planning. The exhaustive Walker Lake ...

    • Minimum/maximum autocorrelation factors applied to grade estimation 

      Silva, Camilla Zacché da; Costa, Joao Felipe Coimbra Leite (2014) [Artigo de periódico]
      It is frequent to face estimation problems when dealing with mineral deposits involving multiple correlated variables. The resulting model is expected to reproduce data correlation. However, is not guaranteed that the ...