Here we go again list! Welcome to the world of Jan Merks, "Mach"
Perry Collier
Senior Geologist
Rio Tinto Technical Services
Phone: +61 7 3327 7676
Mobile: 0408 015 837
-Original Message-
From: Mach Nife [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 8 February 2006 4:59 AM
To: ai-g
Hi Mach (?) Jan Merks is a consultant with a formidable and well-earned reputation in sampling theory and applications. I understand he sits on many committees in Canada which define standards for sampling and evaluation. The first of his "geostatistics scam" articles appeared under the title
machnife,
This has been discussed. You can search the archives to read the discussion.
My best guess is that people posting regularly on AI-Geostats do not agree
that Geostatistics is a scam :-). You can also read what A. Journel had to
say about the argument in material Merks has posted on his web
Hi,
This guy (Jan W Merks) seems to devote his life trying
to prove that Geostatistics is a scam... If it's true
I'm gonna start looking for alternatives.
http://www.geostatscam.com
Anyone has a point of vue on this?
machnife
__
Do You Yahoo!?
Ti
Colin, I suggest you don't have to complicate yourself. If using alternative a), do not touch the nugget; and there;s no need for "scaling" anything. The zonal anis. takes the form of an additional structure, valid only in the direction you're interested in, as you point out with the same range a
Hi All,
Thanks for the many replies thus far. Just
to make it clear: the data has not been normalised. The samples (from drill core)
have simply been composited to equal support lengths. Sorry about the confusion
between gamma and rho, but I think you know what I mean – the left hand
ax
yes- but shouldn't use 'gamma' to mean correlation,
it confuses me.
'rho' is the usual symbol.
In which case, the correlogram shouldn't 'reach a
plateau at gamma = 0.9'
Would expect correlation (and covariance) to
decrease with lag.
Colin- we need a clearer description of your
problem!
Dan
Dear list,
I just want to know if anybody could hint me with some
references or books regarding the relationship between
geostatistics and geology (of ore deposit).
Furthermore, I want to know explicitly how
geostatistics can explain the geology of ore deposit,
for example about: coal deposition
nugget + sill = sample variance
unless you have normalized the data prior to
analysis.
So you could get any value from raw
data.
Dan Bebber
- Original Message -
From:
Colin Badenhorst
To: ai-geostats@unil.ch
Sent: Tuesday, February 07, 2006 9:17
AM
Subject: [ai-ge
Hi All,
I am performing estimation for Ni as a penalty
element to our main ore, using nested spherical correlogram models. One of
these shows abundant and robust experimental data reaching a plateau at gamma =
0.90, and is thus modelled in such a way that the sill of this spherical mode
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