P.A.VASILEV
Nowadays it is accepted that properties of the ore deposit are
changed gently between any two adjacent exploration works. In this way a
straight line limits the ore deposit.
However in reality the thickness of the ore deposit does not
always change gently between each two adjacent exploration works. This is why
it could be accepted that the thickness of the ore deposit in both exploration
works can be considered as a constant on up to the middle point at the distance
between the adjacent works. Under this assumption there are two more possible
configurations of the ore deposit:
-
one with a maximum surface (and correspondingly with maximum reserves),
and
-
a second one with minimum surface (and minimum reserves).
The way they are limited
will be illustrated by an example.
Therefore - when evaluating the exploration works in the situation
where data are available from several trenches only – it is suggested to
estimate the area of the ore deposit and of the reserves in three variants
through
-
maximal,
-
normal, and
-
minimal area.
A preliminary geological and economic evaluation of the hypothetical
ore deposit should be realized in the same three variants.
The above given suggestions want to increase the
responsibility of evaluation what should be considered also from the geoethical
point of view.