STOCKPILE ORE
SORTING PROGRAM
1,000,000 Tonne Stockpile Available for Immediate Processing
Clayton Mine Stockpile Potential
Highlights
- The success of TOMRA’s ore-sorting to enhance the grade of the metals of interest in the stockpile is confirmed by the excellent assay results
- Unprocessed material of 1,000,000 tonnes or more.
- TOMRA X-Ray Transmission (XRT) sorters present a transformative solution for the company with its 1M tonne Stockpile at the Clayton Silver Mine. They bring about significant cost reductions and this innovative approach will also generate an extra source of income for CMX Gold & Silver Corp.
Clayton Mine Stockpile Potential
Highlights
- Excellent assay results from successful 2023 TOMRA XRT Ore-Sorting test program on the Clayton Mine stockpile
- Unprocessed material of 1,000,000 tonnes or more.
- TOMRA X-Ray Transmission (XRT) sorters present a transformative solution for the company with it’s 1M tonne Stockpile at the Clayton Silver Mine. They bring about significant cost reductions and this innovative approach will also generate an extra source of income for CMX Gold & Silver Corp.
Clayton Mine Stockpile
Evaluation Program
In August 2014, representatives of the Company collected samples from 16 locations on the Mine Stockpile situated immediately adjacent to the old Clayton Mine workings and extending to the south. An aggregate of over 3,000 kilograms of sample material was collected. Sample locations were selected to ensure representative samples. CMX representatives were on site during sampling to ensure random sample selection. A tracked backhoe was used to trench to a maximum depth of approximately 12 feet and five representative samples, each weighing roughly 33 kg, were taken at 2-3 foot intervals for each location.
The results from analysis of the stockpile samples confirmed the presence of a suite of metals of potential interest.
Clayton Mine Stockpile Evaluation Program
In August 2014, representatives of the Company collected samples from 16 locations on the Mine Stockpile situated immediately adjacent to the old Clayton Mine workings and extending to the south. An aggregate of over 3,000 kilograms of sample material was collected. Sample locations were selected to ensure representative samples. CMX representatives were on site during sampling to ensure random sample selection. A tracked backhoe was used to trench to a maximum depth of approximately 12 feet and five representative samples, each weighing roughly 33 kg, were taken at 2-3 foot intervals for each location.
The results from analysis of the stockpile samples confirmed the presence of a suite of metals of potential interest.
Clayton Mine Stockpile
Evaluation Potential
The stockpile consists of rock that was not processed through the mill as the grade was not considered high enough at the time it was mined. The stockpile is estimated to contain 1,000,000 tonnes or more of mineralized material readily available for immediate processing.
Dual Energy X-Ray Transmission technologies differentiate between rocks based on small fluctuations in density profiles and are effective at removing sulphides and concentrating valuable metals. The sorted rock can be treated at existing mills/smelters where valuable metals will be extracted and sulphides will be safely handled.
Approximately 500 kilograms of sample material was shipped to the TOMRA ore-sorting laboratory in Sydney, Australia for analysis and process testing. The concentrate produced by sorting was subsequently assayed at Bureau Veritas Australia Pty Ltd.’s laboratory in Sydney. The initial test of the ore-sorting technology comprised a 395-kilogram sample.
Clayton Mine Stockpile Evaluation Potential
The stockpile consists of rock that was not processed through the mill as the grade was not considered high enough at the time it was mined. The stockpile is estimated to contain 1,000,000 tonnes or more of mineralized material readily available for immediate processing.
Dual Energy X-Ray Transmission technologies differentiate between rocks based on small fluctuations in density profiles and are effective at removing sulphides and concentrating valuable metals. The sorted rock can be treated at existing mills/smelters where valuable metals will be extracted and sulphides will be safely handled.
Approximately 500 kilograms of sample material was shipped to the TOMRA ore-sorting laboratory in Sydney, Australia for analysis and process testing. The concentrate produced by sorting was subsequently assayed at Bureau Veritas Australia Pty Ltd.’s laboratory in Sydney. The initial test of the ore-sorting technology comprised a 395-kilogram sample.
TOMRA Ore-Sorting Test
- Successful test results recovered 70%+ of stockpile metals in high grade concentrate from sorted product of 10% of original mass
- Increased silver grade by 6.4 times and the lead and zinc grades by 7 times
- Ore sorting expected to capture gold in stockpile
Assay Results on the Clayton Stockpile
| SILVER | LEAD | ZINC | COPPER | GOLD |
|---|---|---|---|---|
|
oz/t |
% |
% |
% |
g/t |
|
5.02 |
3.1 |
1.91 |
0.096 |
0.1 |
Increase in XRT Ore Sorting Grades
| SILVER | LEAD | ZINC |
|---|---|---|
540% |
600% |
600% |
Clayton Mine Stockpile
Ore-Sorting Program
Compared to average grades documented in the Company’s 2014 stockpile evaluation program, ore-sorting increased the silver grade by 6.4 times and the lead and zinc grades by 7 times. The success of TOMRA’s ore-sorting to enhance the grade of the metals of interest in the stockpile is confirmed by the excellent assay results. Ore-sorting is a proven technology utilized successfully around the world to recover metals from historically mined material. Testing confirmed the Company’s expectation that it would work well on the stockpile material.
The Company’s 2014 stockpile evaluation program returned an average gold grade of 0.80 g/t for samples collected from 16 locations. The 2014 assay results indicated that the gold grade in the stockpile is variable. CMX believes the low grade for gold assayed in the 2023 ore-sorted product is probably representative of the “nugget effect”, which means the sample recovered from the stockpile may or may not have contained more significant gold. Ore-sorting is expected to capture gold in the concentrate when it is present in the stockpile.
Clayton Mine Stockpile Ore-Sorting Program
Compared to average grades documented in the Company’s 2014 stockpile evaluation program, ore-sorting increased the silver grade by 6.4 times and the lead and zinc grades by 7 times. The success of TOMRA’s ore-sorting to enhance the grade of the metals of interest in the stockpile is confirmed by the excellent assay results. Ore-sorting is a proven technology utilized successfully around the world to recover metals from historically mined material.
Testing confirmed the Company’s expectation that it would work well on the stockpile material.
The Company’s 2014 stockpile evaluation program returned an average gold grade of 0.80 g/t for samples collected from 16 locations. The 2014 assay results indicated that the gold grade in the stockpile is variable. CMX believes the low grade for gold assayed in the 2023 ore-sorted product is probably representative of the “nugget effect”, which means the sample recovered from the stockpile may or may not have contained more significant gold. Ore-sorting is expected to capture gold in the concentrate when it is present in the stockpile.
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