Feltrin, Leonardo, and Scott, Margaretha (2010) Considering missing information in 3D weights of evidence modelling, an example from the Drummond Basin, Queensland, Australia. In: Proceedings of the 10th Biennial Meeting of the the SGA 2009 (2) pp. 889-891. From: 10th Biennial Meeting of the SGA 2009, 17-20 August 2009, Townsville, QLD, Australia.

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Abstract

This work discusses an application of GEOPAT3D, a software tool designed to integrate indicator patterns in three-dimensional space by using the Bayes' rule of combination. Bayesian logic is used to combine spatial evidence as in the Weights of Evidence method, a geostatistical approach that has seen extensive application in GIS analysis in several fields of science, including medicine and geology. A case study is considered here to illustrate the software usage and discuss advantages and limitations encountered when performing this type of spatial analysis in 3D. A posterior probability model was developed by 3D Weights of Evidence analysis of a 3D data set representative of the northern part of the Drummond Basin. Scope of this analysis was to estimate favourability indexes indicating the likelihood of finding a mineral deposit of low-sulphidation style in the selected region. Recent results led to the inclusion of a MI (Missing Information) class, which improves OT and NOT test results for the statistical acceptance of the CI (Conditional Independence) level of violation.

Item ID:	22978
Item Type:	Conference Item (Research - E1)
ISBN:	978-0-9805-5868-5
Keywords:	3D modelling, weights of evidence, missing information, Bayesian approach, Epithermal Au-Ag
Related URLs:	Organisation
Date Deposited:	15 Aug 2012 05:32
FoR Codes:	04 EARTH SCIENCES > 0403 Geology > 040301 Basin Analysis @ 100%
SEO Codes:	97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%
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