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CB Gold Inc. Announces Average Combined Gravity Flotation Gold and Silver Recoveries of 88.6% and 81.4%, Respectively From Additional Metallurgical Results for Its Vetas Gold Project

22.05.2014  |  Marketwired

VANCOUVER, BC--(Marketwired - May 22, 2014) - CB Gold Inc. (TSX VENTURE: CBJ)? ("CB Gold" or the "Company") is very pleased to report additional positive results from its second run of metallurgical testwork on material from the Company's Vetas Gold project. The results confirm the excellent recovery for gold and silver. The 40 Vetas ore samples tested responded well to the gravity-flotation process, achieving combined average recoveries of 88.6% Au and 81.4% Ag, with a large portion of the samples reporting Au recoveries in the high 90% range and up to 99.8%.

A laboratory testing program was conducted on forty (40) drill core samples collected by CB Gold from their Vetas Gold project to determine their amenability to gold and silver recovery via centrifugal gravity concentration followed by sulphide flotation processes. The samples were selected from various areas and drill holes so as to be as representative of the deposit as possible. The tests were conducted using the optimized process conditions from the 2013 test work program.

The results from the 2014 testing indicate:

  • Combined gravity / flotation concentrate recoveries of up to 99.8%;
  • Recoveries of up to 91.4%+ for traditional gravity gold recovery;
  • Strong recoveries occurred at relatively coarse grind sizes of P80 100 microns;
  • The Vetas samples were not found to be sensitive to grind size with respect to metal recoveries;
  • Sulphur concentration was found to be proportional to overall metal recovery;

For further information the reader is directed to CB Gold's website at www.cbgoldinc.com where the metallurgical testing reports entitled "Project Report For Metallurgical Testing on Samples From the CB Gold Inc. Vetas Gold Project, August 7th, 2013" and "Metallurgical Testing On 40 Drill Core Samples From the Vetas Gold Project, May 16th, 2014" can be found.

Fabio Capponi, CEO, commented, "We are very pleased with the additional test results which not only confirms the strong recoveries for gold and silver throughout the deposit but even more the processing options, including the possibility to produce a high-grade concentrate for direct smelting. The Company will advance with additional metallurgical testwork as may be required by the different processing options".

Gravity-Flotation Test Methodology

The gravity-flotation tests were carried out to evaluate the variability between each of the Vetas samples' response to this method of recovering gold and silver. The grind size target used for these tests was P80 100 ?m, which was determined in the previous test program to be optimal. A grind time of 20 minutes was used for each sample to provide data on the variability of ore hardness between the samples.

For each test, a 2 kg ground sample was pulped to 20% solids and fed through a 3" laboratory Knelson concentrator. The concentrate from the first pass was cleaned by panning, and the pan tails were combined with the first-pass tails and run through the Knelson for a second pass. The pan concentrates from both passes were assayed for Au and Ag.

Rougher-cleaner flotation tests were conducted on the combined second-pass Knelson tails and second pan tails to recover precious metals that are associated with the sulphide minerals. Each test consisted of four (4) rougher stages followed by two stages of cleaning. All tests were run at pH ~8 and used Potassium Amyl Xanthate (PAX) and Aeropromoter 208 as collectors, along with frother methyl isobutyl carbinol (MIBC).

Gold recovery data is provided in the following table:

                   Gold Grade, g/t Au  Gold Recovery, %  Overall Recovery
                   Flotation     Flotation   
Test No Drill Hole From(m) To(m) P80 Size (mm) Sulphur Grade, %  Meas. Head   Gravity Conc. 2nd Cl. Conc.  1st Cl. Conc.  Total Flotation Conc.   Gravity Conc. 2nd Cl. Conc.  1st Cl. Conc.  Total Flotation Conc.  Au, %
GF1  RM-DDH12-119  98.20  100.25  79  1.08   0.55  175.5  15.1  7.9  1.9  37.2  52.8  54.4  58.2  95.4
GF2  RM-DDH12-119  123.12  125.39  99  1.76   18.41  1024.5  289.8  211.3  81.2  11.6  67.7  72.2  77.3  88.9
GF3  RM-DDH12-119  160.11  164.00  73  2.01   4.75  2293.9  57.0  38.9  12.9  59.3  39.1  39.5  40.1  99.3
GF4  RM-DDH11-046  124.48  127.00  67  2.54   0.90  84.2  18.6  12.3  4.9  9.4  77.6  80.0  86.3  95.7
GF5  RM-DDH12-110  222.67  226.48  84  2.74   3.51  222.9  52.1  37.8  16.3  10.4  85.9  86.9  88.5  98.8
GF6  RM-DDH12-113  101.75  103.04  68  0.62   0.50  223.8  22.7  10.1  2.1  32.8  23.4  26.9  39.9  72.7
GF7  RM-DDH12-113  438.10  441.06  103  1.26   1.23  103.0  52.4  39.7  14.6  9.8  82.8  85.6  88.4  98.2
GF8  RM-DDH12-117  318.20  321.08  113  3.05   0.48  20.6  9.5  6.6  2.2  6.3  55.2  57.9  77.3  83.5
GF9  SI-DDH12-116  61.68  64.11  80  4.65   2.14  137.4  23.8  18.3  8.3  9.9  78.7  82.3  86.5  96.4
GF10  ED-DDH11-028  80.00  81.88  111  3.30   1.29  215.2  20.1  15.3  4.6  17.8  31.4  34.2  47.8  65.5
GF11  ED-DDH11-028  362.00  363.70  116  3.53   1.52  36.6  15.0  12.6  7.4  3.3  82.8  85.9  90.8  94.1
GF12  ED-DDH11-032  419.85  421.85  86  3.82   2.04  108.7  22.3  20.6  11.7  6.9  69.0  72.6  84.9  91.8
GF13  AR-DDH11-039  164.73  166.15  81  4.17   2.87  60.2  32.9  27.1  12.9  3.3  87.5  90.1  93.8  97.1
GF14  AR-DDH11-041  54.50  56.85  88  4.35   1.71  17.3  19.0  16.1  7.5  1.5  65.2  71.2  84.6  86.1
GF15  LD-DDH11-051  124.41  127.73  140  5.17   4.59  129.6  65.4  51.9  25.6  4.6  65.8  74.9  84.9  89.5
GF16  LD-DDH11-054  162.10  164.00  165  6.14   4.21  176.9  13.8  13.7  13.9  7.5  23.3  32.3  54.9  62.4
GF17  RM-DDH13-161  139.79  143.60  91  3.20   4.43  1665.2  40.3  34.8  18.3  49.0  47.8  48.5  49.4  98.4
GF18  RM-DDH13-159  159.27  161.54  95  1.84   1.42  532.5  14.8  10.1  2.9  48.7  41.6  45.8  48.8  97.5
GF19  RM-DDH13-158  257.50  259.50  83  2.01   1.97  107.3  60.7  36.2  9.4  7.3  85.7  88.6  91.1  98.4
GF20  RM-DDH13-156  75.40  78.19  61  0.57   2.36  731.5  52.9  19.4  2.4  45.0  15.4  17.0  31.3  76.3
GF21  RM-DDH13-156  269.30  272.70  86  0.98   1.77  13342.8  293.0  226.5  60.1  79.9  15.7  18.0  19.9  99.8
GF22  RM-DDH13-154  155.00  158.01  83  3.32   2.45  48.8  41.8  34.3  15.3  2.3  86.8  91.3  95.6  97.9
GF23  RM-DDH13-152  83.47  86.31  90  0.48   0.70  25.8  6.6  1.7  0.9  2.2  5.8  12.2  38.4  40.6
GF24  RM-DDH13-152  143.90  147.90  83  3.63   1.62  529.6  15.7  14.1  6.6  39.8  55.9  56.7  58.3  98.2
GF25  RM-DDH12-143  105.30  107.00  78  0.57   2.37  55.5  16.3  11.3  7.2  2.1  4.8  11.2  36.2  38.3
GF26  RM-DDH12-141  96.80  99.15  76  1.83   3.05  2113.1  55.0  43.4  16.3  56.7  31.2  32.9  35.6  92.3
GF27  RM-DDH12-139  163.35  165.16  75  1.55   1.32  1249.8  26.5  22.4  8.4  66.6  29.9  31.1  32.1  98.7
GF28  RM-DDH12-137  209.70  211.73  79  1.13   0.08  1046.7  49.7  36.2  9.7  55.9  38.6  40.3  42.0  98.0
GF29  RM-DDH12-135  71.25  73.64  49  0.38   2.32  3011.5  144.9  38.0  4.5  79.0  13.9  14.7  16.5  95.5
GF30  LD-DDH12-133  53.96  57.30  125  3.82   1.33  72.9  17.7  14.7  7.3  5.6  81.7  84.7  89.5  95.1
GF31  RM-DDH12-130  74.15  77.15  44  0.35   1.21  666.6  30.2  9.8  1.2  66.6  14.0  15.2  20.3  86.9
GF32  SI-DDH12-127  85.69  87.78  143  2.66   3.63  449.4  50.2  40.9  18.6  21.8  50.1  56.0  61.7  83.5
GF33  RM-DDH12-126  99.65  102.10  72  1.50   8.42  109.3  187.9  146.9  43.1  2.4  73.2  82.9  90.5  92.9
GF34  SI-DDH12-086  78.50  81.45  159  4.51   2.37  102.3  34.1  26.5  14.1  6.3  59.5  68.5  74.9  81.1
GF35  SI-DDH12-086  122.36  124.15  94  5.94   4.62  588.0  22.5  18.8  11.5  19.9  75.3  77.3  79.0  98.8
GF36  SI-DDH12-114  89.02  91.55  204  2.15   3.82  41.0  38.9  34.2  15.4  1.8  50.6  57.7  69.9  71.7
GF37  RM-DDH12-088  82.42  84.66  94  0.82   30.68  27333.6  411.4  149.6  18.8  91.4  5.4  6.4  6.7  98.1
GF38  SI-DDH12-105  134.70  139.70  96  1.93   1.55  170.6  33.6  26.5  9.5  15.3  77.2  79.2  82.1  97.4
GF39  ED-DDH12-106A  321.43  324.80  119  3.01   5.16  1810.1  38.8  31.7  6.9  54.2  27.4  33.5  41.1  95.3
GF40  RM-DDH12-113  241.60  243.92  95  2.40   1.22  593.8  25.4  20.3  7.1  40.5  57.3  57.9  58.8  99.2

The test results indicate average combined gravity-flotation gold and silver recoveries of 88.6% and 81.4%, respectively. Gravity gold recovery among the 40 samples tested averaged 27.3%, but varied greatly between 1.5% and 91.4% and produced an average concentrate grade of 1,535.7 g/t. It was found that in general the samples that reported the highest gravity gold recoveries were also the most weathered (contained less sulphur).

Similarly, the samples which contained the highest sulphur content also reported the highest flotation recoveries. There was no clear correlation between metal head grades and gravity or overall recoveries; however the samples with the highest head grades did report consistently high overall recoveries.

The results of the 2014 metallurgical testing program were very positive and are in line with expected results based on the 2013 preliminary testwork.

About CB Gold Inc.:

CB Gold is a mineral exploration company headquartered in Vancouver, British Columbia. CB Gold, through its wholly-owned subsidiary, Leyhat Colombia Sucursal, is actively pursuing the exploration and development of mineral properties in the Republic of Colombia. The Vetas Gold Project consists of a number of previously operating mines and exploration concessions.

For more information on CB Gold please visit our web site at www.cbgoldinc.com or contact +1 (604) 630-5870, or info@cbgoldinc.com.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.

The securities of CB Gold described herein have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act")  or any state securities laws and may not be offered or sold within the United States or to U.S. Persons unless registered under the U.S. Securities Act and applicable state securities laws or an exemption from such registration is available.

Some of the statements contained in this release are forward-looking statements, such as estimates and statements that describe the Company's future plans, objectives or goals, including words to the effect that the Company or management expects a stated condition or result to occur. Since forward-looking statements address future events and conditions, by their very nature, they involve inherent risks and uncertainties. Actual results in each case could differ materially from those currently anticipated in such statements.



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CB Gold Inc.
?+1 (604) 630-5870
?info@cbgoldinc.com?


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