Luminex Announces Excellent Metallurgical Results at Cuyes West
- Positive results from metallurgical test program
- 95% gold recoveries using whole ore cyanidation
- 96% gold recoveries using flotation
- Advancement of Condor North project
- Large and highly prospective land package in Ecuador
- None.
Highlights:
95% gold recoveries using whole ore cyanidation on the Cuyes West high-grade composite.96% gold recoveries using flotation on the Cuyes West high-grade composite.
Marshall Koval, CEO of Luminex stated: "The consistent and high recovery rates with the Los Cuyes materials demonstrated in this test work program represent an important step in advancing the Condor North project and integrating Cuyes West into a future economic study."
C. H. Plenge & CIA S.A. ("Plenge"), an independent metallurgical testing laboratory based in
Table 1: Summary of Test Sample Feed Grades – Los Cuyes Deposit
Sample | Gold | Silver | Lead | Zinc |
g/t | g/t | % | % | |
Los Cuyes Low-Grade | 0.73 | 12.0 | 0.05 | 0.40 |
Los Cuyes High-Grade | 3.65 | 41.7 | 0.22 | 0.91 |
Breccia | 1.06 | 11.4 | 0.02 | 0.43 |
Gravity testing was completed using the composite sample and indicated that approximately
Metallurgical test work indicated that high recoveries for gold and silver using a bulk flotation process are expected at a primary grind of 75 microns, averaging
Cyanide leaching of bulk flotation concentrates produced from the flotation test work demonstrated that high extractions of gold and silver are expected; extractions averaged
Whole ore cyanidation of the three samples indicated that
Preliminary flotation test work to evaluate the option of recovering lead and zinc values was also completed in this test work program and indicates that zinc could possibly be recovered as a by-product to the process. Additional test work is required to fully evaluate the requirements to recover zinc into a saleable concentrate.
Two key process options were evaluated in the Plenge test work program: (i) the option of producing a bulk sulphide flotation concentrate for subsequent cyanide leaching to recover precious metals; and (ii) whole ore leaching of the Los Cuyes material for the recovery of precious metals.
Flotation results are summarized below and show that about
Table 2: Summary of Flotation Test Results – Los Cuyes Deposit
Flotation Concentrate Quality | Flotation Recoveries | ||||
Mass | Au | Ag | Au | Ag | |
% | g/t | g/t | % | % | |
Los Cuyes High-Grade | 15.1 | 26.9 | 248 | 95.9 | 86.8 |
Los Cuyes Low-Grade | 9.8 | 8.08 | 118.5 | 93.4 | 83.9 |
Breccia | 11.3 | 9.40 | 102.3 | 97.8 | 95.0 |
Averages | 95.7 | 88.5 |
Whole ore cyanidation leach test (CIL) work was completed on the three Cuyes West samples, results of which are shown below. The samples show good gold extractions at a primary grind of 75 microns and precious metal recoveries are shown to be slightly lower than flotation recoveries to a bulk sulphide concentrate. Cyanide consumptions are in-line with expectations given the sulphide mineral content of the Los Cuyes materials and are consistent with the industry average.
Table 3: Summary of Whole Ore Leaching Results – Los Cuyes Deposit
Whole Ore Leach Extraction | Reagent Consumption | |||
Au | Ag | NaCN | CaO | |
% | % | kg/tonne | kg/tonne | |
Los Cuyes High-Grade | 94.5 | 32.2 | 1.93 | 1.1 |
Los Cuyes Low-Grade | 91.1 | 34.4 | 1.25 | 1.0 |
Breccia | 87.1 | 34.2 | 1.56 | 1.0 |
Averages | 90.9 | 33.6 | 1.58 | 1.0 |
Leaching of flotation concentrates produced from the three samples was also completed. The results confirm that leaching of a flotation concentrate is a viable option (see summary table below). Additional metallurgical work is recommended to potentially increase the precious metals recoveries when leaching concentrates as it is expected that fine grinding will enhance extractions. Subsequent optimization test work will inform the approach to processing the Cuyes West materials.
Table 4: Summary of Flotation Concentrate Leaching Results – Los Cuyes Deposit
Leach Extraction from Concentrate | Reagent Consumption | |||
Au | Ag | NaCN | CaO | |
% | % | kg/tonne | kg/tonne | |
Los Cuyes High-Grade | 96.8 | 42.5 | 5.5 | 1.8 |
Los Cuyes Low-Grade | 93.1 | 42.5 | 3.1 | 1.8 |
Breccia | 91.1 | 41.9 | 5.6 | 1.7 |
Averages | 93.7 | 42.1 | 4.73 | 1.8 |
Luminex is not aware of any factors that could materially affect the accuracy or reliability of the data referred to herein.
All the samples were assayed by Plenge at its laboratory in
Jeffrey B.
Luminex Resources Corp. (TSXV:LR, OTCQX:LUMIF) is a
Further details are available on the Company's website at https://luminexresources.com/.
To receive news releases please sign up at https://www.luminexresources.com/contact/contact-us/.
Follow us on: Twitter, Linkedin or Facebook.
LUMINEX RESOURCES CORP. | |
Signed: "Marshall Koval" | |
Marshall Koval, CEO and Director |
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.
Certain statements and information herein, including all statements that are not historical facts, contain forward-looking statements and forward-looking information within the meaning of applicable securities laws. Such forward-looking statements or information include but are not limited to statements or information with respect to future metal recoveries from the Los Cuyes deposit and future economic studies. Often, but not always, forward-looking statements or information can be identified by the use of words such as "expected" or variations of that word and phrases or statements that certain actions, events or results are "expected to" be taken, occur or be achieved.
With respect to forward-looking statements and information contained herein, the Company has made numerous assumptions including among other things, assumptions about general business and economic conditions, the prices of gold and copper, and anticipated costs and expenditures. The foregoing list of assumptions is not exhaustive.
Although management of the Company believes that the assumptions made and the expectations represented by such statements or information are reasonable, there can be no assurance that a forward-looking statement or information herein will prove to be accurate. Forward-looking statements and information by their nature are based on assumptions and involve known and unknown risks, uncertainties and other factors which may cause the Company's actual results, performance or achievements, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements or information. These factors include, but are not limited to: risks associated with the business of the Company; business and economic conditions in the mining industry generally; the supply and demand for labour and other project inputs; changes in commodity prices; changes in interest and currency exchange rates; risks relating to inaccurate geological and engineering assumptions (including with respect to the tonnage, grade and recoverability of reserves and resources); risks relating to unanticipated operational difficulties (including failure of equipment or processes to operate in accordance with specifications or expectations, cost escalation, unavailability of materials and equipment, government action or delays in the receipt of government approvals, industrial disturbances or other job action, and unanticipated events related to health, safety and environmental matters); risks relating to adverse weather conditions; political risk and social unrest; changes in general economic conditions or conditions in the financial markets; changes in laws (including regulations respecting mining concessions); risks related to the direct and indirect impact of COVID-19 including, but not limited to, its impact on general economic conditions, the ability to obtain financing as required, and causing potential delays to exploration activities and the preparation of an updated NI 43-101 technical report for the Condor project; and other risk factors as detailed from time to time in the Company's continuous disclosure documents filed with Canadian securities administrators. The Company does not undertake to update any forward-looking information, except in accordance with applicable securities laws.
View original content to download multimedia:https://www.prnewswire.com/news-releases/luminex-announces-excellent-metallurgical-results-at-cuyes-west-301939759.html
SOURCE Luminex Resources Corp.