Preliminary Metallurgical Testwork Yields Excellent Results from Cote Lake Deposit
TORONTO, ONTARIO -- (Marketwire) -- 02/14/11 -- Trelawney Mining and Exploration Inc. (the 'Company' or 'Trelawney') (TSX VENTURE: TRR)(FRANKFURT: RTW) is pleased to announce positive results for the preliminary initial scoping level metallurgical testwork on its Cote Lake Deposit in northeastern Ontario. This testwork was completed by SGS Canada Inc. Mineral Services in Lakefield, Ontario.
Testwork was completed on two 40-kilogram composite samples of drill core from the Cote Lake Deposit. Composite sample 1 consisted of the copper-enhanced mineralization from the hydrothermal breccia and composite sample 2 consisted of the gold-only mineralization from the intrusive breccias.
Composite 1 (copper-enhanced) returned (gravity and cyanidation) recoveries ranging from 85.6 to 94.9% for various feed sizes, with 21.6 % of the gold in this sample captured by gravity circuit. A flotation test of this sample returned a 98.7% recovery for copper.
Composite 2 (gold-only) returned excellent overall recoveries ranging from 94.3 to 97.8%, by combined gravity and cyanidation, with 51.3% of the gold recovered by the gravity circuit.
Preliminary tables are attached below and final data will be available in several weeks. Further metallurgical and comminution testwork is ongoing and additional deposit samples will be submitted as the project moves toward preliminary economic studies.
Greg Gibson, Trelawney's President and CEO commented, 'We are very satisfied with the results of this preliminary metallurgical work which indicate that excellent gold recoveries can be achieved by conventional processing methods. Recoveries of this magnitude in bulk tonnage gold deposits are very favourable for future project development.'
Table 1: Table of Preliminary results: Gold Recovery vs. Grind size
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CN Test Feed Size Reag. Consumption
Comp No. P80, kg/t of CN Feed Au % Recovery
(micro- ------------------------------
metres) CN (Unit)
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NaCN CaO 3 h 24 h 48 h
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Comp 1 CN-7 141 0.24 0.35 32 71 81.7
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CN-8 98 0.18 0.34 33 76 84.2
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CN-9 77 0.21 0.46 35 81 89.6
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Comp 2 CN-10 141 0.01 0.31 25 83 88.3
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CN-11 97 0.01 0.41 24 81 91.1
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CN-12 79 0.22 0.42 28 92 95.5
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CN Test
Comp No. Overall Recovery Residue, g/t Head
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Gravity Gravity CN Au, g/t
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Au Calc Direct
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Comp 1 CN-7 85.6 0.15 0.79
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CN-8 21.6 92.3 0.13 0.82 0.98
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CN-9 94.9 0.09 0.87
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Comp 2 CN-10 94.3 0.08 0.64
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CN-11 51.3 95.6 0.07 0.73 1.34
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CN-12 97.8 0.03 0.67
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(i)Preliminary Results
David Beilhartz, Vice President, Exploration for Trelawney Mining and Exploration, a Qualified Person under NI 43-101, has prepared or supervised the scientific or technical information for the property and verified the data disclosed in this press release.
Trelawney is a Canadian junior mining and exploration company with a focus on Archean gold deposits. The Company's current focus is directed towards the development and continued exploration of the Chester Project, located in Chester Township 20 kilometres southwest of Gogama, Ontario.
This news release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore, involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements.
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 release.
Contacts:
Trelawney Mining and Exploration Inc.
Greg Gibson
President and CEO
416-363-8567
ggibson@trelawneymining.com