『(Abstract)
Unlike other branches of geosciences, exploratory drilling has
not been investigated within the framework of an information system;
so, the expression “value of exploratory drilling information”
(despite its common usage) is vague. This article presents a model
for the evaluation of value of the information gathered from exploratory
drilling after studying different mineral exploration and exploratory
drilling systems within the framework of an “information system.”
Although this model does not present the economic value of information,
it is a suitable tool for comparing different drilling patterns.
The model was verified on the basis of drilling data for the Gol-Gohar
XIIA anomaly.
Key words: mineral exploration information system; exploratory
drilling; entropy; realistic value of information; statistical
value of information.』
Introduction
“Mineral exploration” as an “Information system”
Information system of exploratory drilling
Data gathered from exploratory drillholes
Different processing of exploratory drilling data
Data tabulation
Data desurveying
Compositing
Studying the “Outliers”
Basic statistical studies
Mineral deposit estimation
Classification of deposits
Information value
Literature review
Normative value of information
Realistic value of information
Subjective value of information
Statistical value of information (Quantitative approach)
Economic value of information
Evaluating the information obtained from exploratory drilling
Determining the statistical value of information obtained from
drilling
Value of information before any drilling activity
Value of information after exploratory drillings
Determination of the realistic value of information obtained
from exploratory drillings
Choosing exploratory drilling pattern using the information value
parameter
Selecting the additional drilling pattern based on the statistical
value of information
Selecting the additional drilling pattern based on the realistic
value of information
Conclusions
References