Geology of Ore Deposits

, Volume 53, Issue 1, pp 84-92

First online:

Reliability of volumetric geological structural models

  • B. T. KochkinAffiliated withInstitute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences Email author 

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The results of theoretical analysis of the data commonly used for development of volumetric geological structural models, and the uncertainties that arise interpreting these data, are discussed. Such uncertainties are caused by restricted technical capabilities of structural analysis, necessity in model assumptions, and subjective experience of interpreter. To minimize the uncertainties introduced by the interpreter in the presentation of 3D structure of geological models, a formalized procedure based on methodology of expert judgment has been elaborated. This procedure comprises several stages: compilation of the database of local structural intersections, integration of all structural elements in the block volume, and comparison of alternative models suggested by several interpreters for the given state of knowledge on the studied block. The compilation of the database and integration of intersections and structural elements is accompanied by an estimation of the reliability of decisions made, using specially prepared formal scales. The stages may be cyclically repeated until the knowledge on the block will achieve a degree, which rules out alternative models on the accepted scale.