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Started by Simon-Flotation
During a recent visit to a copper mine in Chile, plant metallurgists mentioned they got colloidal silica in their ore, and it cause some process problems. I guess it is non-crystalline silica or amorphous silica, it has the same chemical structure wi...
Last replied to by jedreiergeo
The question here is what type of copper operation did you visit - one using heap/vat leaching or one using flotation? A...
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Started by Rahil Khan
It is common to find readily usable drill core sampling policies that many exploration sites use as part of their assay and prep labs procedures.Drill core being in many cases the only sample material available for early metallurgical testing.
Last replied to by Aminpro
At Aminpro Labs we do quite a few geomet studies per year.  With help from geologists we first select ore domains by al...
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Started by Chifita
I recently came across such a mineralisation from an area with a lot of Hematite-Magnetite and just on the peripheral zones of the Lufilian Arc in Kasempa District of Zambia. I carried out a research which indicated that it was acicular malachite! ...
Last replied to by Mathias
Regarding the weird looking malachite, this mineral is readily soluble in weak acids. So it should reacht with hydrochlo...
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Started by Charlie
Hello guys, does anybody know what variables are needed/ taken into account to establish an optimum ratio for ore blending? I'm blending two different Pb-Zn ROM samples (low and high grade).
Last replied to by Sugar Watkins
Are you trying to process "average" quality for process stability, tonnage, etc or are you blending to a target metal th...
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Started by Oberfuhrer
What is the maximum and minimum sampling interval that is suitable for drill cores from a first phase drilling in a porphyry Cu-Au deposit?
Last replied to by Paul Morrow
There is no simple answer to sample length, you need to consider geology, mineralisation, structural controls, drilling ...
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Started by Kumar Choudhry
I am wondering about correct sampling procedure from a Full 30 tonnes Dump-truck of Iron ore with the top size of 30-35 Cm. would someone kindly help me to provide any literature.This sampling is required to provide the proper feed to the beneficiati...
Last replied to by Jean Rasczak
What you are suggesting is a very tough sampling problem at that top-size - much like the problem of draw-point sampling...
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Started by Subhash-Kumar-Roy
Please could any one assist me in sampling procedure of Tailing dumps and low grade plies?
Last replied to by Ace Levy
It is essential to separate tailings, or other fine-grained material amenable to easy coring, from low grade stockpiles,...
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Started by Obersturmbann
I’m just wondering if anyone knows any good papers on the QA/QC of assay data.To date I have only been able to find one "Quality Control of Assay Data: A Review of Procedures for Measuring and Monitoring Precision and Accuracy" by Marat Abzalov, wh...
Last replied to by Obersturmbann
Thank you for the suggestions and help gentlemen, I'll follow them up in the next few days. If I come across any similar...
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Started by Helena Russell
Can anyone help me understand how to pin down possible reasons for getting only 37% of my original assays vs. pulp duplicates data plotting within 10% when I generate a HARD plot? I have over 400 pairs of data from three different labs. At each of th...
Last replied to by Ace Levy
Unless your gold is very fine then you are likely to get a fair bit of noise from the pulp duplicates. The first thing t...
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Started by Oberstorm
What is the maximum and minimum sampling interval suitable for cores in a porphyry Cu-Au deposit?
Last replied to by John Koenig
That is a good question. Porphyry Cu deposits are of very substantial size, and thus are typically mined using large-sca...
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Started by Marshal Meru
I need some advice, in different process to sampling (croncretly), so determination of QA/QAC.
Last replied to by Marshal Meru
I will visit this website. Do you know? I've some experience years in geologist. But now I want to be complete in differ...
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Started by Obergruppenfuhrer
I am among those with serious doubts about statements of absolute scientific truth. In reality we only process models of truth to enable us to rationally predict outcomes and connections to currently accepted science. This point of view categorically...
Last replied to by Alan Carter
I was curious as to whether there would be much comment on this.Given that you went to the conference on Sampling Theory...
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Started by Tony Verdeschi
http://is.gd/mQyFQ0. - I was contacted by this start-up the other day and wondering if anybody has been involved in any testing and could give some independent feedbackUnique Volume Instruments for Drill Core Scanning. Minalyze develop volume instru...
Last replied to by Ace Levy
The question about the thickness of investigation of pXRF is essential, and can be easily linked with the statistical me...
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Started by Tony Verdeschi
Today I updated to sampling site image to a thing still done on may mine sites - sampling a dumped load of ore anything from 50 to 100 t or more in a pile.The usual process is collect a number of fragments from the pile then assign the "maybe" materi...
Last replied to by Carl Jenkins
Some time ago I had to design a sampling exercise for a large old (more than 30 years since the mine closed) waste rock ...
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Started by Carl Jenkins
RC Open pit grade control - how many benches? How far ahead in space and timeWhat's a workable number of benches to drill using RC or grade control? Say the benches to mine are 5 m. Three benches or four in one pass? Why? How much to drill in front o...
Last replied to by Bob Mathias
Provided the Resource holes are done with a similar drill method and hole size as your grade control drilling (ultimatel...