Curis updates metallurgical recovery test work at Florence Copper
VANCOUVER, Jan. 8, 2013 /CNW/ - Curis Resources Ltd. (TSX: CUV) ("Curis" or
the "Company") announces results for recently completed ongoing large scale
metallurgical test work in advance of finalization of the prefeasibility study
(PFS) on its 100% owned Florence Copper project in Arizona.
Highlights of the In-Situ Recovery ("ISR") test results shown in Table 1
include the following:
-- ISR tests 17-22 have now been completed with copper extraction
ranging from 51 percent to 90 percent. All tests in this most
recent series were run as previously described in the Curis
press release dated October 11, 2012.
-- When all the copper extraction results are incorporated with
recent sweep efficiency modelling, preliminary indications are
that overall copper recovery of approximately 70 percent will
be achieved from a typical mineralized block.
"The results from this final set of metallurgical test work clearly
demonstrate the potential for improved copper recovery rates at Florence
Copper," stated Dan Johnson, Vice President of Technical Services and
Environment with Curis. "Our objective now is to integrate these results into
a new financial and engineering model for Florence Copper that is scheduled
for release in Q1 2013 in the form of a pre-feasibility study (PFS)."
"Improved copper recoveries, combined with a revised mineral extraction plan
and updated capital and operating cost estimates, are expected to further
confirm Florence Copper as having the potential to be one the lowest cost near
term copper producers in the world," continued Johnson. "We are very happy
with the results of our work over the past year in refining our development
plans and confirming our engineering assumptions for Florence Copper."
Averaging 69 percent copper extraction, the ISR test 17-22 series results
compare favorably with the 70 percent average extraction rates previously
reported for boxes within the ISR test 1-16 series (see Curis Press release on
October 11, 2012). The economic model presented in the September 2010,
Preliminary Economic Assessment (PEA) for the Florence Copper project utilized
an average total copper recovery of 49 percent.
The next step in the metallurgical testing program is to incorporate these
results into an overall assessment of predicted ultimate copper recoveries for
inclusion in the prefeasibility study which is expected to be released in Q1
The goal of the ongoing ISR test program has been to represent a cross-section
through a typical mineralized block in the deposit, and to simulate in-situ
treatment of the Florence Copper ore body by allowing recovery solutions to
flow horizontally through intact pieces of drill core assembled as a
mineralized block using a specially designed laboratory apparatus. This
successful physical simulation and test program was designed by Curis and
Metcon Laboratories of Tucson, Arizona, with oversight and direction from
acknowledged world metallurgical expert, Dr. Terry McNulty.
Dr. McNulty stated that "I continue to believe that the laboratory technique
being employed by Metcon is much more realistic than earlier methods of
projecting non-sulfide copper extraction by in-situ leaching. Also, ongoing
mineralogical characterization of leached residues is improving our
understanding of the behavior of host rock constituents and copper minerals
during these tests."
Metallurgical testing to confirm and improve on historical copper recovery
estimates for the Florence Copper property began in June 2011 at Metcon.
Bottle roll and laboratory scale ISR test results on 16 initial samples from a
2011 core drilling program were reported in previous Curis press releases
dated February 23 and October 11, 2012. The results compared favorably to work
completed by BHP Copper ("BHP") in the mid-1990s, as summarized in Curis'
September 2010 PEA. Laboratory scale ISR test results for six additional
samples from the 2011 core drilling program have now been received and are
Detailed In-Situ Recovery Test Results
The following Table 1 provides details from ISR tests 17-22.
Table 1: ISR Laboratory Test Results For Boxes 17-22
Test Calculated Cumulative
Number Head Assay Extraction
(% Cu) (%Cu)
Box 17 0.44 62.58
Box 18 0.25 51.26
Box 19 0.36 70.45
Box 20 0.44 57.96
Box 21 0.59 90.46
Box 22 0.49 80.88
The metallurgical test program is being supervised by Dr. Terry McNulty, P.E.,
of T. P. McNulty and Associates, Inc. of Tucson, Arizona who is a Qualified
Person (QP) as defined by NI43-101 and has reviewed this disclosure.
Curis Resources Ltd. is a mineral development company associated with Hunter
Dickinson Inc., a diversified global mining company with a 25-year history of
mineral development success. Curis is focused on the acquisition, development
and operation of high-quality next-generation copper properties in progressive
jurisdictions around the world. It is currently focused on advancing its 100%
owned Florence Copper project in Arizona, USA to production.
For more information about Florence Copper, to sign up for news and updates
and learn more about the project's projected economic benefits to the local
community, please go to www.florencecopper.com.
For further details on the Company, please visit www.curisresources.com or
contact Susie Bell, Manager of Investor Relations, at (604) 684-6365 or within
North America at 1-800-667-2114.
President & CEO
Susie Bell Manager, Investor Relations Tel: 604-684-6365
SOURCE: Curis Resources Ltd.
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CO: Curis Resources Ltd.
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-0- Jan/08/2013 13:30 GMT
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