Industrial sorting trials increase mineralization grade on the Mine Chimo property by 170%

Posted in: Mining
Subject : Divers

Highlights:

  • The industrial sorting tests of the representative mineralization of Mine Chimo produced a concentrate representing just over 50% of the mass of the original material with a percentage increase of 170% in the gold grade over the feeding the sorter;
  • The sorting trials performed by Corem and Steinert US are comparable and these result in positive conclusions which bode well for increasing resource value with mineralization sorting technology. The objective of industrial sorting of the mineralization is to increase the content of the preconcentrated material preceding the machining operations, which allows:
    • Increase the recovery rate at the plant;
    • To reduce transport costs to the factory;
    • Reduce machining costs;
    • To reduce the costs of environmental restoration of mining residues;
    • To reduce the environmental footprint of mining residues and thus increase the social acceptability of mining projects.

VAL-D’OR, Quebec, Apr 08, 2021 (GLOBE NEWSWIRE) – Cartier Resources Inc. (TSX-V: ECR) (“Cartier”) announces the results of its industrial sorting tests on the mineralization of the Mine property Chimo, located 45 km east of Val-d’Or. The tests were carried out in two laboratories: Corem in Quebec (Canada) and Steinert US in Kentucky (USA).

Corem sorting tests:

Gold from the Mine Chimo property is present in two types of mineralized facies (FIGURE) either: i) quartz veins with coarse gold grains often visible to the eye having an affinity for the gravity concentration of gold at the plant and ii) zones of mafic rocks rich in silica associated with non-refractory arsenopyrite having an affinity for the flotation concentration of arsenopyrite for the purpose of recovering gold at the plant. To carry out the sorting tests, rocks representative of the 2 mineralized facies, made up of the following 6 mineralogical facies, were first selected for the calibration of the equipment sensors:

  • Gold-bearing quartz veins;
  • Gold-bearing silica;
  • Strong concentration of gold-bearing arsenopyrite;
  • Average concentration of gold-bearing arsenopyrite;
  • Low concentration of gold-bearing arsenopyrite;
  • Barren mafic rock in gold.

The sensors used are the RGB camera using the optical properties of reflection, brightness and transparency to spot quartz and silica and the XRT sensor using the volumetric property of atomic density to spot arsenopyrite. The calibration of the RGB and XRT sensors was validated by dynamic tests, with the conveyor in motion, using 2 kg samples of each of the mineralogical facies.

A calibration sample composed of a fraction of each of the mineralogical facies was then made in order to verify the efficiency of the calibration of the sorter for the mineralization of Mine Chimo. This sorting test was composed of a mixture of the 6 mineralogical facies, mentioned above, in proportions representative of the mineralization of Mine Chimo. The results of this first test show that the first 3 sorts (out of 8 sorts in total) concentrated 99.1% of the gold contained in 44.4% of the mass of material sorted for a content of 56.3 g / t Au representing a 223% increase in gold content over the sorter feed. The gold grade in the reject is 0.40 g / t Au, which represents a recovery loss of 0.9% of the gold.

Given the metallurgical success on the calibration sample, sorting tests on a production sample of 105.7 kg, representative of mineralized facies at an average grade of 2.16 g / t Au, were carried out. This grade is obtained by including 20% ​​of the mass of the material at a zero gold content simulating dilution in mining sites. Tests carried out at Corem separated 53.9% of the mass of the material in the form of preconcentrate at an average grade of 3.68 g / t Au representing a percentage increase of 170% in the gold grade compared to l feed to the sorter. The waste disposal, thus separated from the mineralization, represents 46.1% of the mass at an average grade of 0.38 g / t Au.

Steinert US sorting tests:

Sorting trials, carried out at Steinert in Kentucky (USA), yielded comparable results. An 80.69 kg production sample, representative of facies mineralized at an average grade of 2.13 g / t Au, to which 20% of the mass of the material has been mathematically added at zero gold content, representing the dilution in construction sites, was used for testing. The new grade thus diluted is now 1.55 g / t Au. The calculation of the results reveals that 51.0% of the mass of the diluted material could be separated in the form of preconcentrate at an average grade of 2.72 g / t Au representing a percentage increase of 175% in the content of or compared to the sorter feed. The waste disposal, which would thus be separated from the mineralization, would represent 49.0% of the mass of the material at an average grade of 0.36 g / t Au. The sorting tests carried out at Corem were carried out following the tests of Steinert US to validate that the 20% by mass of dilution material with zero gold content, mathematically added, could physically be separated efficiently by the sorter. The results obtained by Corem are positive and of the same order of magnitude as those of Steinert US.

Highlights of the Mine Chimo project

  • The third resource estimate*1 gold products made available on March 22, 2021 produced (FIGURE) :
    • 6,616,000 tonnes at an average grade of 3.21 g / t Au for a total of 684,000 ounces of gold in the indicated resource category and;
    • 15,240,000 tonnes at an average grade of 2.77 g / t Au for a total of 1,358,000 ounces of gold in the category of inferred resources.

*1 : Mineral resource estimate for the Mine Chimo property, Quebec, Canada, Christine Beausoleil, P. Geo. of InnovExplo Inc., March 22, 2021.

  • Cartier owns a 100% interest in the property for which a 1% NSR (“Net Smelter Return”) royalty has been granted to IamGold Corporation. There is no right of first refusal granted.
  • The property, which is easily accessible year-round, is located near 6 mineral concentrators in the Val-d’Or region.
  • Fourteen gold zones were mined by 3 producers between 1964 and 1997 for a production of 379,012 ounces of gold.
  • The mining infrastructure consists of a network of 7 km of galleries, distributed over 19 levels and connected by a 5.5 m x 1.8 m shaft with 3 compartments with a depth of 920 m. The headframe and the surface installations were dismantled in 2008 but the 25 kV power line and the sand pit are still in place.
  • The study on the hoisting capacities of the well on the Chimo Mine property reveals that the components of the internal structure of the shaft could make it possible to hoist with elongated buckets (“skips”) of 20 metric tons (mt), 4,921 mt / jr at the rate of 10 hours of hoisting operation per 24-hour day, i.e. 1.7 M tm / year. The hoisting capacity in 10 hours of operation / 24 hours could be increased to 6,151 t / d (2.2 M tm / year) with “skips” of 25 tm and to 7,381 tm / d (2, 6 M tm / year) with “skips” of 30 tm; all this mainly by replacing the guides in place with steel guides.
  • The drilling work, carried out to date by Cartier on the Mine Chimo property, consists of 124 holes totaling 58,054 m and 21,867 gold samples collected.

About Cartier Resources Inc.

Cartier Resources Inc., founded in 2006, is based in Val-d’Or, Quebec. This province has consistently ranked among the best mining territories in the world, primarily due to its favorable geology, attractive fiscal environment, and pro-mining government.

  • The company has a solid cash position with more than $ 10.4M, as well as a significant corporate and institutional endorsement including Agnico Eagle Mines, Jupiter Asset Management and Quebec investment funds.
  • Cartier’s strategy is to focus its efforts on gold projects with characteristics that offer rapid growth potential.
  • The Company has a portfolio of exploration projects located in the Abitibi greenstone belt in Quebec; one of the most prolific mining regions in the world.
  • The Company is focused on advancing its 4 key projects through drilling programs. All of these projects have been acquired at reasonable costs in recent years. All are ready to be drilled with the target geometric extension of known gold deposits.
  • Exploration work is currently focused on the Mine Chimo and Benoist properties in order to optimize value for investors. The next exploration work will be carried out on the Fenton properties and then on Wilson.

Quality Assurance / Quality Control

The analytical results, from Cartier drill holes, were obtained from NQ-caliber core samples crushed up to 80% passing a 10 mesh (2.00 mm) mesh then pulverized up to 90% passing a mesh of 200 mesh (0.07mm). Cartier inserts 5% of the number of samples in the form of certified standards and another 5% in the form of sterile samples to ensure quality control. The samples are analyzed at the Techni-Lab (Actlabs) laboratory, located in Ste-Germaine-Boulé, Quebec. The 50 g pulps are analyzed by fire assay and read by atomic absorption. If i) the result is? 1.0 g / t and <10.0 g / t, a second pulp is analyzed and read by atomic absorption and if ii) the result? 10.0 g / t, the second measurement is carried out by gravimetry. For samples containing visible gold, 500 g of rock pulverized up to 90% passing a mesh of 140 mesh (0.11 mm) are analyzed by the "Metallic Sieve" method.

Qualified people

The scientific and technical information of the Company and of the Mine Chimo project, present in this press release, has been written and revised by MM. Gaétan Lavallière, P. Geo., Ph. D., Vice-President and Ronan Déroff, P. Geo., M. Sc., Senior Geologist, Project Manager and Geomatician, qualified persons within the meaning of NI 43-101. Mr. Lavallière approved the information contained in this press release.

About Corem

Corem is a center of expertise in research and innovation, established in Quebec, specializing in the processing of minerals. Using its state-of-the-art facilities, Corem has, for more than 20 years, offered services in the optimization of grinding circuits, physical separation (gravimetric, magnetic and electrostatic), flotation , physico-chemical techniques of extractive metallurgy and recovery of metals, mineralogical characterization as well as agglomeration and thermal treatment processes of ores.

For more information, contact:

Philippe Cloutier, P.  Geo.
President and CEO
Telephone: 819-856-0512
[email protected]
www.ressourcescartier.com

The TSX Venture Exchange and its Regulation Services Provider accept no responsibility for the adequacy or accuracy of this press release.

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Press release sent on April 8, 2021 at 8:30 am and distributed by:

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