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## Messages from Adrian Martínez Vargas

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• For unknown reasons, three messages from Adrian Martínez Vargas which were sent to the list didn t arrive in the archives. These
Message 1 of 1 , Aug 8, 2002
For unknown reasons, three messages from Adrian Martínez Vargas
<amvargas@...> which were sent to the list didn't arrive in
the archives. These messages can be found here under.

Gregoire (Owner/Moderator of AI-GEOSTATS)

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1) AI-GEOSTATS: Kriging in folded ore body

I m looking for information for Kriging in folded ore body; I need
some articles, freeware and examples. It can be good some information
related to the use of geologic to increase the precision in
estimation.

2) AI-GEOSTATS: data for different genetic types of ore bodies

Where can I get data for different genetic types of ore bodies, that
must be accompanied with a complete geologic information, maps etc.
It is for educational purposes.

3) AI-GEOSTATS: Question about the Theory of Lognormal Kriging.

Looking for information about the Theory of Lognormal Kriging
(block kriging) I have a read a papers from ISATIS reference guide
book that use these formula.

1) They assume that the distribution is lognormal with the
distribution.

Zv = exp [a(1/V * Volumen_Integral{Y[x]dx}) +b]

2) a and b are calculate for achúrate the estimation of mean and
variance of Zv.

The problem is the meaning of the integral used to calculate a
wish is needed to transform Yv to Zv and its relative variance of
estimation. The equation of a is:

a^2= (S_y^2 + J)/(Sy^2-Ganma_y_v,v)

J=log(1/v^2 Volumen_DobleIntegral{exp[-Ganma_y_(x-y)] dxdy}

These is what I don't understand Ganma_y_(x-y).
I think that can be
a. variogram of the block V
b. Variogram of the Block and the neighborhood data.

Someone can tell me what is the meaning of these, and if is possible
to estimate with the classics numerical solution.

I hoop the notation is enough legible

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