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Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment pp 11–14Cite as

Compositionally Compliant Contact Analysis

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Abstract

Contact analysis assesses the evolution of the average value along boreholes of a given variable at increasing distances from the contact between two facies or domains. The concept is long established in the geostatistical literature and software, albeit for studying the behavior of a single variable. This contribution explores practical ways for studying this transient behavior of a set of variables forming a composition, in such a way that spurious correlation effects are avoided. This is obtained with contact diagrams for each possible pairwise logratio of two components, as well as with a contact analysis of the centered-logratio transformed components. This approach is particularly promising when the set of components considered account for a considerable amount of the total mass, or dilution effects are suspected to have affected only a subset of the components. These concepts are illustrated with data from Murrin Murrin, WA, a Ni-Co laterite deposit where intensive remobilization of both value and deleterious components is known to have occurred.

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Author information

Authors and Affiliations

  1. HIF, Helmholtz Institute Freiberg for Resource Technology, Freiberg, Germany

    R. Tolosana-Delgado

  2. ECU, Edith Cowan University, Joondalup, WA6027, Australia

    U. Mueller

  3. HIF, Department of Modelling and Valuation, Helmholtz Institute Freiberg for Resource Technology, Freiberg, Germany

    K. G. van den Boogaart

  4. TUBAF, Institute of Stochastics, Technical University “Bergakademie”, Freiberg, Germany

    K. G. van den Boogaart

Authors
  1. R. Tolosana-Delgado
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  2. U. Mueller
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  3. K. G. van den Boogaart
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Corresponding author

Correspondence to R. Tolosana-Delgado .

Editor information

Editors and Affiliations

  1. School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India

    N. Janardhana Raju

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© 2016 Capital Publishing Company

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Tolosana-Delgado, R., Mueller, U., van den Boogaart, K.G. (2016). Compositionally Compliant Contact Analysis. In: Raju, N. (eds) Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment. Springer, Cham. https://doi.org/10.1007/978-3-319-18663-4_2

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