Excelsior’s
Preliminary Metallurgical Tests Fully Consistent with Prefeasibility Results
May
20, 2015
Excelsior
Mining Corp. (TSX-V: MIN) (Frankfurt: 3XS) (OTCQX: EXMGF)
("Excelsior" or the “Company”) is pleased to announce interim results from
ten “fracture simulation” leach tests at the Gunnison Copper Project in
Arizona.
The
tests demonstrate copper recovery from the fractured rocks occurs rapidly and
relatively uniformly across all rock types. The tests have also allowed for
detailed and quantitative acid consumption measurements. To date, the results
of recovery and acid consumption are entirely consistent with the metallurgical
parameters used in the 2014 Prefeasibility Study (PFS).
On
September 15, 2014, Excelsior announced that it had commenced a metallurgical
drilling and testing program at the Gunnison Copper Project. The drilling
program consisted of ten (10) diamond-drill holes totalling 5,899 feet (11,306
feet in total drilling). The drilling program generated new samples,
representing a variety of structures and rock types, which were then submitted
for extensive metallurgical testing. The results of the metallurgical tests
will be used to determine copper extraction rates, acid consumption rates, and
rinsing procedures and rates. Results will be used for both the permit
application process and the Feasibility Study.
A total
of ten “fracture simulation” leach tests have been ongoing as part of the
metallurgical program. Fracture simulation boxes #1 and #2 have been completed
after 199 and 166 days of respective leaching. Box #3 is still leaching after
170 days and the remaining seven boxes have been leaching for approximately 80
days. Highlights of the preliminary results are set out in Table 1 below.
Commenting
on these results, Stephen Twyerould, President and C.E.O. said, “The fracture
simulation boxes offer us the best lab-scale testing of expected underground
leach conditions to date. We are pleased to see that across all rock types, these
initial results mirror the industry-leading outcomes from our 2014
Prefeasibility Study in terms of acid consumption and copper recoveries. Once
again, Excelsior has returned results that highlight the viability of an
in-situ recovery operation at Gunnison.”
Link zur aktuellen Firmen-Präsentation: http://excelsiormining.com/images/Presentations/min_ppt.pdf
Quelle: excelsiormining.com
Quelle: excelsiormining.com
Quote:
Excelsior Mining:
Jüngste Kursrally nur der Anfang - Viele relevante News für Gunnison im 2.
Quartal 2015 erwartet
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