Mr. Ernest Simmons reports
ATLANTA GOLD ANNOUNCES POSITIVE RESULTS FROM PRELIMINARY METALLURGICAL TESTWORK
Atlanta Gold Inc. has released positive metallurgical test results from 11 tons of
bulk stock material previously washed by a sluice/jig plant located at
Knife River Corp.'s facility in Boise, Idaho (see news
release dated Sept. 26, 2012), with the objective of obtaining 25
pounds of concentrate for refining evaluations and estimating costs.
The initial bulk sample of 107 tons processed by Knife River in August,
2012, recovered 20 per cent of the gold values from an average feed of 0.051
ounce per ton Au. Reprocessing in June, 2013, of 11 tons of the
materials remaining from the initial bulk sample and grinding to minus 20
mesh liberated additional gold and heavy metals produced a concentrate
of 18.896 ounces per ton Au which was verified by an independent mine laboratory.
Of the total gold, 66.6 per cent was recovered from standard cyanidation. Using
grind, roast and cyanidation, overall recovery rates increased to
88.9 per cent.
Ernest Simmons, president and chief executive officer, commented: "Additional lab work will
be needed to optimize grinding, roasting and cyanidation at a selected
toll recovery facility located out of state. We are very pleased with
this initial result which demonstrates that with some fine-tuning on
the gravity test we will be able to maximize the recovery of the metals
from on-site concentrates that are of a quality that justify toll
processing and refining costs."
Sample ID Gold head grade Free gold Gold to carbon Gold tail grade Recovery
(opt Au) (mg Au) (opt Au) (opt Au) %
Cyanidation only 18.896 55.745 7.200 8.173 66.6
Grind, roast and cyanidation 18.896 31.043 13.506 3.043 88.9
The objective for final recovery testing is to determine if the on-site
gravity recovery system would produce a concentrate using only water as
a medium. This testing supports the hypothesis that gravity separation
is a viable option.
Bulk stock material was fed by hopper conveyor feeder to a ball mill and
the outflow slurry delivered to a custom sluicing system with an eight-foot-long spreading flume and into a 30-inch-wide-by-four-foot-long sluice box
containing low profile riffles.
The sluice concentrates were collected after each 2,000-pound run. The
concentrates were taken back to the shop, screened through a 20-mesh
screen and the minus 20 mesh was upgraded/cleaned on a four-by-eight shaker table,
producing 25 pounds of heavy concentrate obtained from processing 11 tons
of the feed material.
The plus-20-mesh shaker table tails, minus-20-mesh sluice concentrate, head feed
samples, sluice tailings and overflow slimes were saved, dried, sealed
and sent for assay.
Notable amounts of fine, free gold was visible in the concentrate from
approximately to minus 20 mesh down to the finest gold the human eye can
detect.
Qualified person
Eric Berentsen, a director of Atlanta Gold and a qualified person
as defined by NI 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.
© 2024 Canjex Publishing Ltd. All rights reserved.