The primary purposes of the bulk-sampling program at Golden Summit are to determine the continuity of gold mineralization found within numerous gold-bearing shear zones that were discovered and delineated through trenching and shallow RAB drilling over the past two years, and to generate cash flow from the on-site gravity concentration
of the gold found in this material.
A total of 36,329 lbs has been processed through the onsite gravity concentration
circuit, in three separate tests of 10,821, 14,797 and 10,711 pounds respectively, on sand material extracted from the North Sand Zone.
A gravity concentration
test was completed on 10,821 pounds of sand material extracted from the North Sand Zone and processed through the new circuit.
Samples are being collected for pilot scale metallurgical testing this winter to determine which gravity concentration
method maximizes the recovery of the free milling gold contained within the stockpiles.
The free milling properties of the gold in the samples indicate that gravity concentration
is viable, which should help gold extraction ahead of cyanide leaching resulting in lower cyanide consumption and shorter leach residence time.
AuRIC completed three bulk tests (194 lb, 220 lb, 3,000 lb) of sand material collected from a single site within the North Sand Zone using a new gravity concentration
Further metallurgical test work will be undertaken to optimise the gravity concentration
circuit and investigate the impact of an expanded flow sheet that would include secondary processing.
Ireland's metallurgists have completed a third bulk test (3,000 lbs) using the new gravity concentration
circuit that was previously announced.
OTCBB: IRLD) today reported new results from gravity concentration
tests completed on sand material from the North Sand Zone, which is located in the northwest sector of its Columbus Project in Esmeralda County, Nevada.
30% of the total gold was recovered as free gold by gravity concentration
Use of secondary and tertiary gravity concentration
to "clean" the mine concentrate has shown that slightly more than 50% of the recovered gold particles are smaller than 100 mesh (150 microns), with more than half of this fraction consisting of particles smaller than 100 microns.
reports that initial metallurgical and gravity concentration
tests of the manganese indicate economic viability for production of a 50% manganese concentrate.