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266
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Started by rcpa
Dear friends, I am interested in prospecting natural gold in Brazil. I have seen many sites advertising gold detection devices, but I am very suspicious about the effectiveness of these equipments. Could anyone give me a hint how I should start my...
Dear friends, I am interested in prospecting natural gold in Brazil. I have seen many sites advertising gold detection devices, but I am very suspicious about the effectiveness of these equipments. Could anyone give me a hint how I should start my...
Last commented on by sediment-hosted-minerals
That's crazy timing! great list though. I think bottom line is that folks need to know that you cant just buy any metal detector and expect to find gold with it. Thank you for compiling the list.
That's crazy timing! great list though. I think bottom line is that folks need to know that you cant just buy any metal detector and expect to find gold with it. Thank you for compiling the list.
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750
VIEWS
Started by Ravele
I am conducting a research on recovering strategic elements from tailings. I am looking for a drilling company that will help with drilling the tailings dam for sample collection from the top to the bottom of the tailings dam, about 20-30 m deep.
I am conducting a research on recovering strategic elements from tailings. I am looking for a drilling company that will help with drilling the tailings dam for sample collection from the top to the bottom of the tailings dam, about 20-30 m deep.
Last replied to by SIMetallurgist
We had success with sonic drilling.
We had success with sonic drilling.
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822
VIEWS
Started by banoda
I have started gold mining in Ethiopia and looking for advice and information relating gold wash machine up to 8 ton per hour, and am newly born in conducting gold mining and have lease for land to explore and extract gold sand. I need your advice t...
I have started gold mining in Ethiopia and looking for advice and information relating gold wash machine up to 8 ton per hour, and am newly born in conducting gold mining and have lease for land to explore and extract gold sand. I need your advice t...
Last replied to by sediment-hosted-minerals
Dear Banoda I just joined this site. Did you ever get your question answered? I can help.
Dear Banoda I just joined this site. Did you ever get your question answered? I can help.
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752
VIEWS
Started by mkdevarajan
Does the industry accept resource model of Laterite Nickel deposits where the samples were assayed using Handheld XRF ?
Does the industry accept resource model of Laterite Nickel deposits where the samples were assayed using Handheld XRF ?
2
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703
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Started by Millza79
Has anyone got any papers on the impact of ore variability (lithology, mineralogy, grade etc) on the financial performance of a process plant?
Has anyone got any papers on the impact of ore variability (lithology, mineralogy, grade etc) on the financial performance of a process plant?
4
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719
VIEWS
Started by ebnk15
Hi, Can someone provide me with any ideas, or help, on laying out a plan of operation for a BLM Prospecting Permit on National Forest Land in the Eastern Region? I am looking for gold, and have some ideas where I would like to search. Unfortunately,...
Hi, Can someone provide me with any ideas, or help, on laying out a plan of operation for a BLM Prospecting Permit on National Forest Land in the Eastern Region? I am looking for gold, and have some ideas where I would like to search. Unfortunately,...
1
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630
VIEWS
Started by Leonita
Hi I just want to know how would I go about to determine if the sample we are sending after processing a half core is representative of the lot it is from? We start with a whole core that is halfed, sampled in 1m samples that is equal to 2/3kg that...
Hi I just want to know how would I go about to determine if the sample we are sending after processing a half core is representative of the lot it is from? We start with a whole core that is halfed, sampled in 1m samples that is equal to 2/3kg that...
3
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1132
VIEWS
Started by Bluegene66
Combination of high grade Zinc/Gold in a VMS system is very rare ie: 5m of 12% Zinc 14g/t Gold 1%Cu in a core sample. Can someone explain the structure and the significance of this unusual occurrence. Thanks.
Combination of high grade Zinc/Gold in a VMS system is very rare ie: 5m of 12% Zinc 14g/t Gold 1%Cu in a core sample. Can someone explain the structure and the significance of this unusual occurrence. Thanks.
Last commented on by
Do you have any gold or zinc in quantities you want to sell
Do you have any gold or zinc in quantities you want to sell
2
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970
VIEWS
Started by aufinder
Trying to Identify Ore pics attached close up and angles I believe this ore to be Cavarite ...(Krennerite or Sylvanite or Combo? or least gold Telluride Calaverite? I have acid washed this Specimen once 2 weeks ago with muratic and it stayed ...
Trying to Identify Ore pics attached close up and angles I believe this ore to be Cavarite ...(Krennerite or Sylvanite or Combo? or least gold Telluride Calaverite? I have acid washed this Specimen once 2 weeks ago with muratic and it stayed ...
9
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1136
VIEWS
Started by montsep
I'm an environmental journalist and I'm preparing an article on photovoltaic cells. I would like to know the degree of exploitation of world quartz resources, and the current trend of this figure, given nowadays extraction rate. I'd like to know als...
I'm an environmental journalist and I'm preparing an article on photovoltaic cells. I would like to know the degree of exploitation of world quartz resources, and the current trend of this figure, given nowadays extraction rate. I'd like to know als...
Last replied to by Robert W Schafer
On a commercial scale metallurgical silicon metal is produced by the carbothermic reaction of silica (quartz) in an electric arc furnace using carbon electrodes where the temperature in the main react...
On a commercial scale metallurgical silicon metal is produced by the carbothermic reaction of silica (quartz) in an electric arc furnace using carbon electrodes where the temperature in the main react...
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954
VIEWS
Started by NGVirginia
I have access to a Copper-Molybdenum tailings site with the following mineral content present (grams/ton): Bismuth - Bi (0.9), Selenium - Se (0.7), Tellurium - Te (0.4), Rhenium - Re (0.15), Gold - Au (0.015), and Silver - Ag (0.5). I am having diffi...
I have access to a Copper-Molybdenum tailings site with the following mineral content present (grams/ton): Bismuth - Bi (0.9), Selenium - Se (0.7), Tellurium - Te (0.4), Rhenium - Re (0.15), Gold - Au (0.015), and Silver - Ag (0.5). I am having diffi...
2
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869
VIEWS
Started by Nish
Hi guys, I've recently been given an opportunity to work on a geo metallurgy focused project, I however am a geologist and not very familiar with geo metallurgical processes. Could the metallurgists on here please advise on synthesis gold doped sy...
Hi guys, I've recently been given an opportunity to work on a geo metallurgy focused project, I however am a geologist and not very familiar with geo metallurgical processes. Could the metallurgists on here please advise on synthesis gold doped sy...
2
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1310
VIEWS
Started by lkperumal
Dear all, I am searching about the magnetic properties of ferrosilicon ( 15% or 20% Si content). Anyone, please send me complete magnetic property details of FeSi with various composition. Thanks in advance
Dear all, I am searching about the magnetic properties of ferrosilicon ( 15% or 20% Si content). Anyone, please send me complete magnetic property details of FeSi with various composition. Thanks in advance
0
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855
VIEWS
Started by oluwatunmise
Hi everyone, Have been given an opportunity to talk on different approaches to gold exploration in basement terrain (i.e Geochemical, Geophysical, Geological, Mineralogical, etc). However, am a geologist but not well inclined to this approaches. plea...
Hi everyone, Have been given an opportunity to talk on different approaches to gold exploration in basement terrain (i.e Geochemical, Geophysical, Geological, Mineralogical, etc). However, am a geologist but not well inclined to this approaches. plea...
2
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900
VIEWS
Started by Mattiel
Hello Everyone, we have recently acquired a claim with an old mine on it. We took some grab samples from inside the mine. We took samples from both the vein, and altered wall rock. We have done roughly 5 sets of testing with an average grade of ~15g/...
Hello Everyone, we have recently acquired a claim with an old mine on it. We took some grab samples from inside the mine. We took samples from both the vein, and altered wall rock. We have done roughly 5 sets of testing with an average grade of ~15g/...
1
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1003
VIEWS
Started by PJ
I work in a very heterogeneous, nuggety narrow vein gold deposit, and I am looking for a way to catch jumbo or longhole cuttings as a slurry before they land on the sill and become contaminated, and the gold separates. Has anyone here solved this iss...
I work in a very heterogeneous, nuggety narrow vein gold deposit, and I am looking for a way to catch jumbo or longhole cuttings as a slurry before they land on the sill and become contaminated, and the gold separates. Has anyone here solved this iss...
Last replied to by Sylvain Tremblay
The solution would be very quick if your production drill was an In the Hole drill rig as you would be able to transform it, without a great investment into an RC drill rig and therefore catch your dr...
The solution would be very quick if your production drill was an In the Hole drill rig as you would be able to transform it, without a great investment into an RC drill rig and therefore catch your dr...
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5754
VIEWS
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).
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 OberstGruppen
About ore blending & stockpiles: Since the function of the stockpile is to act as an ore reservoir rather than as an ore processor, the action of forming a stockpile should have as little effect as ...
About ore blending & stockpiles: Since the function of the stockpile is to act as an ore reservoir rather than as an ore processor, the action of forming a stockpile should have as little effect as ...
3
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856
VIEWS
Started by louwrens
Hi all we have a mining operation, and our lab cannot explain the fire assay results provided, we did quite extensive test work on the ore and have received inconsistent results. Once the ore is delivered to our site the ore tests at 40-60 g AU per ...
Hi all we have a mining operation, and our lab cannot explain the fire assay results provided, we did quite extensive test work on the ore and have received inconsistent results. Once the ore is delivered to our site the ore tests at 40-60 g AU per ...
1
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859
VIEWS
Started by Moneer_Noor
we have several quality issues at magnesite mine (ultramafic alteratoin type). we are sampling 1 sample from blasthole material which depth in 4 meter for each hole to grade conrolling ROM. several quality issue is recorded. the mine material qualit...
we have several quality issues at magnesite mine (ultramafic alteratoin type). we are sampling 1 sample from blasthole material which depth in 4 meter for each hole to grade conrolling ROM. several quality issue is recorded. the mine material qualit...
Last replied to by Marshal Meru
I think it is also important to know the location of the sample. Blast hole sampling is the only one that gives you the location information. So I will keep this one for sure. I will try to reconcile ...
I think it is also important to know the location of the sample. Blast hole sampling is the only one that gives you the location information. So I will keep this one for sure. I will try to reconcile ...
3
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4870
VIEWS
Started by oro
Modern geophysical methods of mineral exploration are still too expensive for many small commercial scale placer miners, and seem to require a high level of learning and deployment. I sometimes think / dream about a simple device that would measure...
Modern geophysical methods of mineral exploration are still too expensive for many small commercial scale placer miners, and seem to require a high level of learning and deployment. I sometimes think / dream about a simple device that would measure...
1
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901
VIEWS
Started by Happiness
I need a scenarion where gravity method is deployed for inverstigating an ore body in contrast to the surrounding
I need a scenarion where gravity method is deployed for inverstigating an ore body in contrast to the surrounding
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1003
VIEWS
Started by Witzcat
Dear experts, I would like to summarize all metals used for producing a car by calculating the mineral raw materials needed for each metal contained in a car. Of course I understand that each location and lagerstatte is different and there is not re...
Dear experts, I would like to summarize all metals used for producing a car by calculating the mineral raw materials needed for each metal contained in a car. Of course I understand that each location and lagerstatte is different and there is not re...
Last replied to by David
This is a tough one. I did something similar just for the iPhone 6. https://www.usgs.gov/ was useful. I never did find what you are looking for exactly. I had to do math and plugin basic assumptions....
This is a tough one. I did something similar just for the iPhone 6. https://www.usgs.gov/ was useful. I never did find what you are looking for exactly. I had to do math and plugin basic assumptions....
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1607
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Started by Nugget-hunter
identification of nugget of native metal found on the edge of granite country in northern Queensland Australia. SG of 5.4 and does not attract a magnet.
identification of nugget of native metal found on the edge of granite country in northern Queensland Australia. SG of 5.4 and does not attract a magnet.
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1011
VIEWS
Started by jlpalacios
Hi, My name is José Luis, and I am doing my PhD about the assessment of mining/metallurgical processes by applying the Second Law of Thermodynamics. I am on the stage where I need to start to model a mining process. Would you mind telling me, w...
Hi, My name is José Luis, and I am doing my PhD about the assessment of mining/metallurgical processes by applying the Second Law of Thermodynamics. I am on the stage where I need to start to model a mining process. Would you mind telling me, w...
Last replied to by David
https://www.911metallurgist.com/blog/mineral-processing-extractive-metallurgy-methods https://www.911metallurgist.com/blog/mineral-processing-flowsheets
https://www.911metallurgist.com/blog/mineral-processing-extractive-metallurgy-methods https://www.911metallurgist.com/blog/mineral-processing-flowsheets
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1383
VIEWS
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...
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...
3
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1378
VIEWS
Started by Biglizer
Hello everyone I have some few questions to ask: I encounter an outcrop of quartz vein larger more than 5 feet wide,first assay of a sample shows about 0.4ppm,i decided to do trenching and pit sampling...few samples by sorting show few gold by pa...
Hello everyone I have some few questions to ask: I encounter an outcrop of quartz vein larger more than 5 feet wide,first assay of a sample shows about 0.4ppm,i decided to do trenching and pit sampling...few samples by sorting show few gold by pa...
Last replied to by mkdevarajan
There are many places where isolated small quartz veins may give high grade gold mineralization which may support artisanal gold mining. But they may be far placed from each other that commercial mini...
There are many places where isolated small quartz veins may give high grade gold mineralization which may support artisanal gold mining. But they may be far placed from each other that commercial mini...
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2748
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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! ...
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! ...
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1291
VIEWS
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?
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 methods, mining methods, sample preparation techniques and ultimately is the cop...
There is no simple answer to sample length, you need to consider geology, mineralisation, structural controls, drilling methods, mining methods, sample preparation techniques and ultimately is the cop...
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1924
VIEWS
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...
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 in underground cave mining methods.Unfortunately sampling theory would indicate...
What you are suggesting is a very tough sampling problem at that top-size - much like the problem of draw-point sampling in underground cave mining methods.Unfortunately sampling theory would indicate...
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1311
VIEWS
Started by Subhash-Kumar-Roy
Please could any one assist me in sampling procedure of Tailing dumps and low grade plies?
Please could any one assist me in sampling procedure of Tailing dumps and low grade plies?
Last replied to by
It is essential to separate tailings, or other fine-grained material amenable to easy coring, from low grade stockpiles, or any other waste rock heap, which is particularly challenging to sample. It m...
It is essential to separate tailings, or other fine-grained material amenable to easy coring, from low grade stockpiles, or any other waste rock heap, which is particularly challenging to sample. It m...
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2377
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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...
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 open source papers I will share them through this forum.
Thank you for the suggestions and help gentlemen, I'll follow them up in the next few days. If I come across any similar open source papers I will share them through this forum.
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2114
VIEWS
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...
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
Unless your gold is very fine then you are likely to get a fair bit of noise from the pulp duplicates. The first thing to check is how is the duplicate pulp collected - if is taken from jus the top of...
Unless your gold is very fine then you are likely to get a fair bit of noise from the pulp duplicates. The first thing to check is how is the duplicate pulp collected - if is taken from jus the top of...
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1470
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Started by Oberstorm
What is the maximum and minimum sampling interval suitable for cores in a porphyry Cu-Au deposit?
What is the maximum and minimum sampling interval suitable for cores in a porphyry Cu-Au deposit?
Last replied to by
That is a good question. Porphyry Cu deposits are of very substantial size, and thus are typically mined using large-scale bulk tonnage methods. Consequently, ore blocks are usually estimated that are...
That is a good question. Porphyry Cu deposits are of very substantial size, and thus are typically mined using large-scale bulk tonnage methods. Consequently, ore blocks are usually estimated that are...
I picked rubble from the ground and took 100g sample for fire assay. The result was 26g/ton. That is quite encouraging