Crown Mining Reports Results from Metallurgical Study
CROWN MINING REPORTS RESULTS FROM METALLURGICAL STUDY
TORONTO, CANADA, January 4 , 201 8 - Crown Mining Corporation ( “Crown” or the
“Company”) (TSX Venture: CWM) is pleased to announce test results from its initial
metallurgical testing of mineralized samples from its Moonlight and Superior copper sulfide
deposits located in the Light’s Creek Copper District, Plumas County, northern California.
The metallurgical test work for the Moonlight deposit resulted in a copper recovery of 88% with
a concentrate grade of 32.1% copper.
The table below provides additional results of the test work that was completed on the Moonlight
and Superior deposits:
Deposit
Head
grade
Cu (%)
Head
grade
Ag (opt)
Rougher
flotation
Cu
recovery
(%)
Rougher
flotation
Ag
recovery
(%)
Cleaner
concentrate
grade Cu
(%)
Cleaner
concentrate
grade Ag
(opt))
Moonlight 0.56 0.21 88.0 72.3 32.1 7.0
Superior 0.43 0.24 86.8 60.4 22.1 11.3
Crown commissioned Dr. Corby Anderson, through Allihies Engineering Incorporated, in
collaboration wit h Continental Metallurgical Services, to undertake an initial metallurgical
evaluation of Crown’s copper (silver) deposits. The intention of the test program was to confirm
effective flotation reagent conditions and demonstrate the recoveries and concentr ate quality that
can be achieved with the tested material.
The Allihies -Continental metallurgical report states that good recoveries and good grade
concentrates are achievable with 90% of the grind passing 100 mesh with low reagent
consumption. Additio nal testing will be required to determine optimum grind size and reagent
mix. Mineralogical analysis using AMICS (Advanced Mineral Identification and
Characterization System) identified chalcopyrite and bornite as the dominant copper minerals.
The report also noted the absence of iron sulfide (pyrite) in the samples as being advantageous in
the flotation of the copper mineralization as well as potentially having other operational
advantages. The report recommends that the next phase of testing will eva luate a regrind circuit
which could enhance recoveries, particularly for the Superior deposit.
These metallurgical results will be incorporated into the Preliminary Economic Assessment on
the Moonlight deposit currently being prepared by Tetra Tech, Inc of Vancouver.
Crown controls approximately 15 square miles of patented and unpatented federal mining claims
in the Light ’s Creek Copper District; essentially, the entire District. The District contains
substantial copper (silver) sulfide and copper oxide resources in three deposits – Moonlight,
Superior and Engels, as well as several partially tested and untested exploration targets.
The Superior and Engels Mines operated from about 19 15-1930 producing over 161 million
pounds of copper from over 4 million tons of rock containing 2.2% copper with silver and gold
credits. The Moonlight Deposit was discovered and drilled by Placer Amex during the 1960’s.
The three deposits host the following National Instrument 43-101 ( “NI 43 -101”) resources,
calculated using ordinary kriging and a cutoff grade of 0.20% copper:
Deposit Tonnes Grade Copper
(tons in brackets) (%) (pounds)
Moonlight (Indicated) 146 million (161mm) .324 1.04 billion
Moonlight (Inferred) 88 million (88mm) .282 496 million
Superior (Inferred) 54 million .41 487 million
Engels – oxide (Inferred) 2.5 million 1.05 60 million
Further details of th ese resources and the parameters used to calculate them can be found in the
Technical Report on the Moonlight Copper Property dated April 12, 2007 and the Technical
Report on the Superior Project dated November 7, 2014 filed on Sedar.com. Additional historical
resource estimates are also disclosed in these reports.
Mr. George Cole is the Qualified Person pursuant to NI 43-101 responsible for the technical
information contained in this news release, and he has reviewed and approved this news release.
For more information please see the Crown website at www.crownminingcorp.com.
For Further Information Contact:
Mr. Stephen Dunn, President , CEO and Director, Crown Mining Corporation (416) 361 -2827 or
email [email protected].
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 press release.
This press release contains forward -looking statements within the meaning of applicable Canadian and U.S.
securities laws and regulations, including statements regarding the future activities of the Company. Forward -
looking statements reflect the current beliefs and expectations of management and are identified by the use of words
including “will”, “anticipates”, “expected to”, “plans”, “planned” and other similar words. Actual results may
differ significantly. The achievement of the results expressed in forward-looking statements is subject to a number of
risks, including those described in the Company’s management discussion and analysis as filed with the Canadian
securities regulatory authorities which are available at www.sedar.com. Investors are cautioned not to place undue
reliance upon forward-looking statements.