Tower Resources Reports up to 96.9% Gold Recoveries from Initial Metallurgical Test Wok at JD Property
September 17 2013 - 9:19AM
Access Wire
Vancouver, B.C. - Tower Resources Ltd. Reports
the results of preliminary metallurgical testing on samples from
the JD Gold Project in the Toodoggone Gold District of north
central British Columbia. The JD Property is comprised of over
15,000 hectares located approximately 50 kilometres north of Aurico
Gold Inc's past producing Kemess Mine.
A composite sample of drill core from drill hole JD-12-001,
drilled within the Finn Zone (see Tower's August 29, 2012 News
Release), was selected for initial testing, in particular samples
from 23 to 45 meters down hole were chosen. The average grade of
the composite is 1.25 g/t Au and 24.70 g/t Ag. The sample was
selected to represent different lithologies and alteration
assemblages associated with lower to moderate grade mineralization
within the Finn Zone. This was deemed a critical first step because
high extraction of gold from lower-grade material will add to the
overall economic potential of the project.
The sample was submitted to Inspectorate Exploration &
Mining Services Ltd. in Richmond B.C. and was subjected to three
tests including gravity concentration at two grind sizes and
cyanide leach and flotation assessment at three grind sizes
each.
The samples subjected to centrifugal gravity separation at a
grind size of P80 100 microns yielded a recovery of 47.8% of the
gold and 13.5% of the silver.
The samples responded well to bottle-roll leach testing with an
average of 86.5% gold extraction and 55.8% silver extraction at a
grind P80 size of 100 microns. The leach kinetics responded well to
finer grinding with maximum gold extraction occurring in less than
40 hours at P80 at 75 microns. At this grind size, 82.7% gold
extraction and 55.8% silver extraction was attained.
In the flotation test gold recoveries of up to 96.9% at grind
size of P80 75 microns and silver recoveries of up to 92.5% at P80
100 micros were attained after 8 minutes of flotation. Gold
recovery reportedly increased with decreasing grind size.
It is recommended by Inspectorate to pursue a sequential gravity
- flotation and gravity - cyanide leaching tests to evaluate
combined metal recoveries. Finer grinding is recommended prior to
cyanide leaching to help further liberate the metals from the
sulphide mineral matrix and maximize leach extraction.
As well Tower plans to follow-up this initial metallurgical
study with detailed analyses of higher grade composites typical of
the core of the Finn Zone.
President Mark Vanry states "We are pleased with these
preliminary results from initial metallurgical testing at JD. The
composite samples are amenable to high recoveries of gold and
silver by conventional cyanidation and sulphide floatation
extraction methods. Characterizing the metallurgy of the high-grade
core of the Finn Zone will be our next step."
Testing was performed by the Metallurgical Division of
Inspectorate Exploration and Mining Services Ltd., of Richmond,
British Columbia. Results have been reviewed and approved by
Kenneth Thorsen, BSc, P.Eng, a consultant of the company and
qualified person for the purposes of National Instrument 43-101 -
Standards of Disclosure for Mineral Properties of the Canadian
Securities Administrators.
Tower Resources Ltd.
Mark Vanry - Director, CEO & President
(604) 558-2565
mvanry@towerresources.ca
http://www.towerresources.ca/
Neither the TSX Venture Exchange nor the Investment
Industry Regulatory Organization of Canada accepts responsibility
for the adequacy or accuracy of this release.
Forward-Looking Statement Caution
This news release contains certain "forward-looking
statements", as defined in the United States Private Securities
Litigation Reform Act of 1995, and within the meaning of Canadian
securities legislation. The Company cautions that forward-looking
statements are based on the beliefs, estimates and opinions of the
Company's management on the date the statements are made and they
involve a number of risks and uncertainties. Consequently, there
can be no assurances that such statements will prove to be accurate
and actual results and future events could differ materially from
those anticipated in such statements. The Company undertakes no
obligation to update these forward-looking statements if
management's beliefs, estimates or opinions, or other factors,
should change, except as required by law. There are numerous risks
and uncertainties that could cause actual results and Tower's plans
and objectives to differ materially from those expressed in the
forward-looking information. The reader is urged to refer to the
Company's public disclosure which is available through the Canadian
Securities Administrators' System for Electronic Document Analysis
and Retrieval (SEDAR) at http://www.sedar.com/
for a more complete discussion of such risk factors and their
potential effects.
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