September 28, 2011 Northair Announces Positive Metallurgical Results for La Cigarra Silver Project, Mexico
International Northair Mines Ltd. (TSXV: INM) (the "Company" or "Northair") is pleased to announce the receipt of positive results from its initial phase of metallurgical test work on the La Cigarra silver project, located in north central Mexico. Recoveries of silver from this early test work ranged from 84% to 94%, with additional testing planned to further optimize metal recoveries.
The metallurgical study was conducted on samples collected by the Company from multiple core and one reverse circulation drill hole located within the San Gregorio Zone. The composite samples were broadly classified into two types; sulphide material and mixed sulphide-oxide material, respectively. The sulphides batches assayed 89 g/t silver and 81 g/t silver, while the mixed sulphide-oxides batches assayed 148 g/t silver and 157 g/t silver. The samples were tested by flotation and cyanide leaching.
Metallurgical tests indicate that silver within the sulphides is best recovered using a flotation process while recoveries from the mixed sulphide-oxides is optimally achieved through leaching. Rougher flotation recovered 94% of the silver in the sulphides at approximately 100 micron grind while leaching of the whole mixed sulphide-oxides recovered 84% of the silver at 100 micron grind over a 48 hour period.
"We are very encouraged with the results from our initial metallurgical test work program" said Fred Hewett, President & CEO of Northair. "The goals of this phase of testing have been achieved as we have demonstrated we can obtain good silver recoveries by flotation and leaching methods. In addition to the results of our current core drill program, these initial metallurgical results represent a very positive step as we continue to advance the La Cigarra Project."
The metallurgical program was carried out by G&T Metallurgical Services of Kamloops, B.C., through the consulting firm of JDS Energy & Mining Inc., under the supervision of Hoe Teh, P.Eng, a Qualified Person as defined by NI 43-101. Mr. Teh has reviewed this news release and agreed to its contents.
La Cigarra Drilling Update:
Drilling is currently underway at the La Borracha Zone, where the Company has completed the first three core holes on the zone, with one additional hole planned. Geological logging and sampling of the completed drill holes at La Borracha is progressing well and results will be released once all assays are received and interpreted.
Once this initial core drilling at La Borracha is completed the Company will relocate the drill rig to systematically drill test the northwest projection of the San Gregorio Zone that is defined by a strong soil and rock geochemical anomaly. This anomaly, which remains open, extends at least 500 metres northwesterly from hole CC-10-001 towards the La Borracha Zone. As an initial test of this large target area the Company expects to drill on an approximate 100 metre drill spacing.
About the La Cigarra Silver Project:
The La Cigarra silver project is located in the state of Chihuahua along the eastern fringes of the Sierra Madre Occidental in Mexico. La Cigarra hosts a silver-rich, epithermal mineral system with three identified zones along a three kilometre trend. Drilling to date has indentified a strong and potentially surface minable mineralized system comprised of the central (San Gregorio) and south (Las Carolinas) zones. The mineralization encountered within these two zones remains open down dip, with the combined strike length of the two zones totaling 1.7 kilometers and open. Additional upside exploration potential exists to the northwest of the central zone where a further 1.5 kilometres of structure and a coincident silver soil geochemical anomaly has been identified and remains a priority drill target (La Borracha). Highlights from the drill program include 80.45 metres of 123.5 g/t silver in hole CC-11-002 and 82.95 metres of 121.1 g/t silver including 9.35 metres of 628.7 g/t silver in hole CC-11-011.
The Company also announces that it has granted 175,000 stock options at $0.25 to directors and employees. All of the options are exercisable for a period of 5 years from the date of grant.
This news release has been prepared in accordance with Canadian regulatory requirements set out in National Instrument 43-101 and reviewed by Fred Hewett the Company's President and CEO, and a Qualified Person under NI 43-101.
ON BEHALF OF THE BOARD,
INTERNATIONAL NORTHAIR MINES LTD.
"Fred G. Hewett"
Fred G. Hewett, P.Eng.
President & CEO
For further information please contact Fred Hewett, President or Chris Curran, Investor Relations
at 604-687-7545 or 1-888-338-2200
Website: www.northair.com/international/ Email: [email protected] _______________________________________________________________________________
Neither 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.
This news release may contain forward looking statements which are not historical facts, such as ore reserve estimates, anticipated production or results, sales, revenues, costs, or discussions of goals and exploration results, and involves a number of risks and uncertainties that could cause actual results to differ materially from those projected. These risks and uncertainties include, but are not limited to, metal price volatility, volatility of metals production, project development, ore reserve estimates, future anticipated reserves and cost engineering estimate risks, geological factors and exploration results. See Northair's filings for a more detailed discussion of factors that may impact expected results.
This news release does not constitute an offer to sell or solicitation of an offer to sell any securities in the United States. The securities 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.
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