Mr. Bill Baird reports
ATLANTA GOLD REPORTS POSITIVE RESULTS FROM PRELIMINARY METALLURGICAL TESTWORK
Atlanta Gold Inc. has received positive metallurgical results from the 107-ton bulk sample
extracted from exploration trenches at its Atlanta gold project in
Elmore county, Idaho.
As previously announced on July 5 and Aug. 12, the company processed the initial bulk sample at Knife River
Corp.'s test facility in Boise, Idaho. This test facility is
meant to model Knife River's process plant operating in Idaho City, which is
effectively a giant sluice box that washes away lighter crushed rock
from the gold particles. It uses no chemicals, is cost-effective and is
described in more detail in a Sept. 15 local news article.
"These initial metallurgical test results confirm that the processing
method successfully liberates the gold content present in the extracted
material. We plan to work with Knife River to replicate the existing
process facility on the Atlanta project site, improve the technology
and customize it for Atlanta's purposes. Apart from the significant
environmental benefits, such as no use of chemicals, the recycling of
water and the capturing of heavy metals, the capital and operating
costs for this type of facility are expected to be much less than those
for a conventional mill," said Ernie Simmons, president and chief executive officer of the
company.
The 107-ton bulk sample was crushed down to a feed size of one-eighth, which
was processed in two days through the gravity-washed system, and
samples were assayed at four collection points in the system (feed,
sluice carpet, underjig and tailings). Free gold particles collected in
the system would be sent for refining into dore gold bars; while the
remaining sulphide material, commonly referred to as black sand, will be
further processed off-site.
TEST RESULTS
Bulk sample Au grade Weight
(oz/t) (g/t) (t) (lb)
Feed 0.049 1.69 107.00 214,000
Sluice 1.341 45.98 0.34 680
Underjig 0.058 2.00 7.50 15,000
Tailings 0.048 1.63 99.16 198,320
Total sample 107.00 214,000
Notes:
- One troy ounce per short (imperial) ton equals 34.2857 grams per (metric) tonne
or 34.2857 parts per million.
The results indicate that processing of the initial bulk sample left
significant amounts of gold behind in the tailings. Further testwork
is obviously necessary to improve recovery. Therefore, the company will
reduce the grind size of material to a feed size of plus-50 (plus-10-millimetre) mesh,
relocate the jigs and reduce the angle of the sluice boxes so that less
than 0.001 ounce per ton (0.034 gram per tonne) gold remains in the tailings. A small test
sample has been successfully processed subsequent to the 107-ton bulk
sample and demonstrates the potential of this refinement. It is
anticipated that a continuing program will be necessary to customize the
process for the material extracted from the exploration trenches and
to optimize recoveries.
The company had previously anticipated that the 107-ton bulk sample
would yield a gold and silver concentrate weighing less than 1,000
pounds (news release of Aug. 1, 2012). By implementing the above
processing changes, the company expects to meet its recovery and
concentrate grade objectives.
Qualified person
Eric Berentsen, a director of Atlanta Gold and a qualified person
as defined by National Instrument 43-101, has reviewed and verified the technical
information contained in this news release. Mr. Berentsen is a
registered member of the Society for Mining, Metallurgy and
Exploration Inc.
Quality control and assurance
Assay analyses are done by Inspectorate America Corp. of Sparks,
Nev. Inspectorate is an international laboratory
that has operated in Nevada for more than 10 years. The facility is International Organization for Standardization (ISO)
certified 9001:2008.
Quality control and assurance of the analytical results are maintained at
the laboratory by inserting standards and blanks into the sample run.
We seek Safe Harbor.
© 2024 Canjex Publishing Ltd. All rights reserved.