SYS-CON MEDIA Authors: PagerDuty Blog, Michael Jannery, Pat Romanski, Elizabeth White, Liz McMillan

News Feed Item

Copper North Announces Results of Preliminary Economic Assessment of Gold and Silver Recovery at Carmacks Copper

VANCOUVER, BRITISH COLUMBIA -- (Marketwired) -- 05/30/14 -- Copper North Mining Corp. ("Copper North" or the "Company") (TSX VENTURE:COL) is pleased to announce the results of a preliminary economic assessment (the "PEA") that evaluates the recovery of gold and silver alongside the recovery of copper at the proposed Carmacks Copper leach project. The Project is located near the village of Carmacks in Central Yukon. The PEA will be filed on SEDAR within the next 45 days.

By adding gold and silver extraction, the PEA supersedes the Oct 2012 Feasibility Study of copper leaching prepared by M3 Engineering and Technology Corporation ("M3"). The NI 43-101 compliant report was filed on SEDAR Nov 27, 2012. The Feasibility Study for Carmacks Copper was limited to the evaluation of heap leaching of oxide copper to produce cathode copper, and did not include gold and silver recovery.

The Company indicated in its April 25, 2014 news release that it was undertaking a strategic review of the Carmacks Copper project to explore opportunities for improving project economics. The first phase of the review was to evaluate the recovery of gold and silver alongside the copper leach facility and is the basis of the PEA. The PEA combines the previous study of copper heap leaching with the results of the Phase I conceptual study of gold and silver recovery. The first phase of work was undertaken by Alistair Kent, P.Eng. of Merit Consultants International Inc. and Dr. Morris Beattie, P.Eng.; both are Independent Qualified Persons. Their work to assess the potential viability of additional gold and silver recovery, as presented in this PEA, has been combined with the results of the previous studies on geology, mineral resources, potential mining plan, and potential copper heap leaching design.

The PEA will be followed by a second phase of re-engineering and optimization of the mine and processing plan. Upon completion of Phase II study, considering improvement opportunities, a new prefeasibility or feasibility study will be prepared for project financing purposes.

The results of the preliminary leach test work and modelling of gold and silver recovery are positive and a broader study is warranted. The previous potential open pit mine plan remains unchanged from that proposed in the M3 Feasibility Study and is the basis of the PEA. Estimated capital and operating costs for the recovery of gold and silver are added to the estimate for copper recovery (M3 Feasibility Study) to provide new capital and operating costs for the PEA. The addition of capital and operating costs for gold and silver recovery, to those from the M3 Feasibility Study, are conceptual and substantial additional work is required to provide the certainty of a feasibility study.

Dr. Harlan Meade, President and CEO of Copper North states: "The results of the Preliminary Economic Assessment" are quite favourable and confirm that the recovery of gold and silver alongside copper recovery is feasible and provides a very positive potential improvement in project economics. The increase in annual net operating revenues significantly reduces the cash operating cost for copper, after deduction of gold and silver credits, to US$1.07/lb copper from the previous US$1.59/lb. The inclusion of gold and silver recovery into the previous mine and processing plan, provides an opportunity to reconsider leach alternatives for operational efficiency. The proposed Phase II plan includes a review of various copper, gold and silver leach alternatives.

Project Economics

The Base Case metal price in the M3 Feasibility Study was US$3.20/lb copper which is near the median of current medium to long term analyst forecasts for copper. For continuity purposes the PEA Base Case pricing for copper remains US$3.20/lb, with gold at US$1330/oz and silver at US$21.50/oz. An Exchange Rate of CAD$1.00 equals US$0.90 has been assumed in the PEA.

The impact of the addition of gold and silver recovery, are summarized as follows:


--  Net Revenues increased approximately 28% from US$677 million to US$870
    million 
--  Net Cash from Operations increases by 42% from US$333 million to US$471
    million 
--  Life of Mine Operating Cost increases from US$344 million to US$398
    million; a 15% increase 
--  Life of Mine Cash Operating Cost, after gold and silver credits,
    decreased from US$1.59/lb to US$1.07/lb for copper 
--  Pre-tax NPV(discounted at 8%) is US$66 million and After-tax NPV(8%) is
    US$32 million 
--  Pre-tax Internal Rate of Return is 15% and After-tax IRR is 12% 
--  Copper recovery remains unchanged at 85% and gold recovery is 78% and
    silver recovery 75% 
--  Capex increased from US$178 million including contingency for the M3
    Feasibility Study to US$225 million (including a contingency of US$21M)
    for the PEA 
--  Potential Life of Mine Annual production is 30,000,000 pounds copper,
    17,300 ounces gold and 165,000 ounces silver 
--  Mine Life approximately 8 years 

Development Plan

The PEA development plan includes the Measured and Indicated mineral resources, conceptual mine plan and crushing of the mineralization as stated in the M3 Feasibility Study. The previous copper-only leach plan has the crushed material being placed permanently on one large lined pad with staged inter-liners, and standard dispensing of weak sulphuric acid over the leach materials and recovery of pregnant fluid for processing in the Solvent Extraction Electowinning (SXEW) facility to produce cathode copper. The PEA assumes that several smaller on-off pads will be constructed for leaching of the copper, after which the leach materials are washed to remove residual acid and dissolved copper. The washed materials will then be moved to the gold and silver permanent leach pad and prepared for cyanidation with the addition of lime and agglomeration to improve cyanide leaching. A weak cyanide solution is applied using drip emitters on the leach materials and the pregnant solution would be collected and piped to a sulphidation-acidification-recycle-thickening/adsortion-desorption-recovery (SART/ADR) plant for the further removal of any copper in the solution before recovering gold and silver.

The PEA entails the addition of on-off pads for copper leaching and additional handling equipment and fluid piping, and the addition of a SART/ADR plant. Conceptual design of the additions provides the basis for estimating the increase in the operating and capital requirements.

Mineral Resource and Mining

The following table summarizes the mineral resource for zones 1, 4 and 7 for the Measured and Indicated mineral resources that total 11,980,000 tonnes grading 1.07% total copper of which 0.86% is soluble copper. The mineral resource also contains substantial gold and silver. The resources in the oxide classification form the basis for the potentially mineable mineralization by open pit methods.

Mineral Resources at a 0.25% Total Copper Cut-Off


----------------------------------------------------------------------------
----------------------------------------------------------------------------
                                Tonnage t    TCu    CuX    CuS     Au     Ag
Zone                   Class        (000)    (%)    (%)    (%)  (g/t)  (g/t)
----------------------------------------------------------------------------
----------------------------------------------------------------------------
               Measured (ME)        4,031   1.10   0.90   0.20  0.588  5.666
              Indicated (IN)        7,949   1.04   0.83   0.20  0.391  4.039
Oxide                 ME+IN        11,980   1.07   0.86   0.21  0.456  4.578
                    Inferred           90   0.73   0.53   0.20  0.128  1.809
----------------------------------------------------------------------------
----------------------------------------------------------------------------
                                                                            
               Measured (ME)          695   0.80   0.02   0.77  0.261  2.542
              Indicated (IN)        3,645   0.74   0.03   0.71  0.205  2.296
Sulphide              ME+IN         4,340   0.75   0.03   0.73  0.221  2.369
                    Inferred        4,031   0.71   0.01   0.70  0.179  1.900
----------------------------------------------------------------------------
----------------------------------------------------------------------------

Measured and Indicated mineral resources within the proposed open pit total 11,551,000 tonnes grading 0.805% soluble copper, 0.456g/t gold and 4.578 g/t silver. The PEA is preliminary in nature, and includes only Measured and Indicated mineral resources. The Inferred mineral resources are considered too speculative geologically to have economic considerations applied to them to be categorized as mineral reserves; furthermore, there is no certainty that the mineral resources will be economic and become a mining reserve, and the Company is not relying upon the mineral reserves in the prior feasibility study.

In-Pit Mineral Resource

The conceptual mining plan entails mining 1,750,000 tonnes per annum using open pit method. The mineralization will be transported to the crushing circuit and after 3-stage crushing the mineralization will be loaded by conveyors to the leach pads for copper extraction. Life of Mine waste to potentially mineable material ratio is 5.1:1 with a maximum mining rate of 37,500 tonnes per day.


----------------------------------------------------------------------------
----------------------------------------------------------------------------
In-Pit Mineral Resource              Tot Cu Sol Cu Nonsol Cu  Gold   Silver 
 Category                   K tonnes    (%)    (%)       (%)  (g/t)    (g/t)
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Measured Mineral Resource      4,127  1.039  0.851     0.188  0.559     5.39
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Indicated Mineral Resource     7,424  0.943  0.780     0.163  0.365     3.76
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Measured & Indicated                                                        
 Resource                     11,551  0.977  0.805     0.172  0.435     4.34
----------------------------------------------------------------------------
----------------------------------------------------------------------------
1.) Total material in potential Open Pit of 69,957,000 tonnes and Waste to  
 Mineral Resource ratio of 5.1:1.                                           
                                                                            
2.) Resources are fully diluted and based on a cut-off grade of 0.18%       
 soluble copper                                                             
----------------------------------------------------------------------------
----------------------------------------------------------------------------

Metallurgy and Process Plan

Extensive test work on the oxide copper mineralization, consisting largely of malachite, azurite and tenorite, has demonstrated rapid leaching of the copper with the addition of weak sulphuric acid. Processing of the copper mineralization is planned for leaching on three lined pads utilizing the same parameters as previously established for the copper leach.

The copper leach metallurgical work undertaken in 2009 by PRA Metallurgical Division, of Inspectorate, also included an evaluation of gold and silver recovery by cyaniding of the copper leach residues by means of column testing. On the basis of these column tests results, overall copper recovery is predicted at 85%, gold recovery at 78% and silver recovery at 75%.

The review by Dr. Morris Beattie also indicated the recovery of additional copper remaining after the acid leach, and removal of this dissolved copper in a SART circuit in the gold and silver recovery ADR plant.

Qualified Persons

The scientific and technical information in this news release has been reviewed and approved by Dr. Harlan Meade, P. Geo., President and CEO of the Company, and Independent Qualified Persons under NI 43-101: Alistair Kent, P.Eng. Merit Consultants International Inc.; Dr. Giles Arsenau, P.Geo., mineral resource estimation; Dr. Morris Beattie, P.Eng., metallurgical consultant; Michael Hester, FAusIMM, mining consultant and John Hull, P.Eng., geotechnical consultant.

Project Opportunities

The PEA has indicated that the recovery of gold and silver should be positive to project economics. The PEA evaluation has also indicated an opportunity to reduce capital and operating cost utilizing vat leach technology. The evaluation of vat leaching of copper, compared to the heap leach method, is in progress.

Benchmarking with other projects indicates that there may also be an opportunity to reduce capital by taking a different approach to engineering and procurement; this opportunity is also under review.

The commencement of Phase II work to undertake the detailed engineering required for a feasibility level report, is contingent on raising additional capital. The Phase II work is expected to take approximately 9 months to complete.

The review also indicates the potential to expand both oxide and sulphide mineral resources with additional exploration in the various other zones. It is proposed to undertake leach tests on sulphide mineralization; should this be feasible, there is potential to extend production beyond the current 8-year mine life.

About Copper North

The Company is focused on the exploration and development of copper deposits. Its core asset is the Carmacks Project in the Yukon which is progressing to feasibility study for the early production of copper, gold and silver from proposed leach operations. The Company's Redstone Project in the North West Territories is a large high grade copper deposit that is at the early exploration stage. The copper mineralization at Redstone is extensive, spanning 180 kilometers of copper-bearing strata.

On behalf of the Board of Directors,

Dr. Harlan D. Meade, President, CEO, and Director

Cautionary and Forward-Looking Information Comments

This news release includes certain forward-looking information or forward-looking statements (collectively "Forward-Looking Information") for the purposes of applicable securities laws. Forward-Looking Information includes, but is not limited to, statements with respect to the results of the PEA and potential recovery of gold and silver at the Carmacks project; potential improvement in project economics and reduction in operating costs; the proposed Phase II study and its timing; the potential pre-feasibility or feasibility study on the Carmacks project; the proposed exploration and development activities and their timing and potential mineralization; possible events, conditions or performance that are based on assumptions about future courses of action; the timing and costs of future exploration and development activities on Carmacks; permitting and infrastructure time lines and requirements; and requirements for additional capital. In certain cases, Forward-Looking Information can be identified by the use of words and phrases such as "plans", "expects" or "does not expect", "scheduled", "estimates", anticipates", "potential", "recommends" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would" or "will be taken", "occur" or "be achieved". These statements address future events and conditions and, as such, involve known and unknown risks, uncertainties and other factors, which may cause the actual results, performance or achievements to differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's expectations include, among others, that the development plans under the PEA will not proceed as planned, the gold and silver recovery will not impact revenue and operating costs as projected, the timing and success of future exploration and development activities, exploration and development risks, market prices, exploitation and exploration results, availability of capital and financing, general economic, market or business conditions, uninsured risks, regulatory changes, defects in title, availability of personnel, materials and equipment, timeliness of government approvals, unanticipated environmental impacts on operations and other exploration risks detailed herein and from time to time in the filings made by the Company with securities regulators.

In making the forward-looking statements, the Company has applied several material assumptions including, but not limited to, the assumptions that the results of the PEA and the proposed plans thereunder will proceed as planned, that the recovery of gold and silver will have a positive impact on project economics and reduce operating costs, that the proposed exploration and development of Carmacks will proceed as planned, the Company will be able to timely obtain permits and licences required for development of the property and conduct its operations, that market fundamentals will result in sustained metals and mineral prices, current exploration and other objectives concerning Carmacks can be achieved, that the Company's other corporate activities will proceed as expected, and any additional financing needed will be available on reasonable terms. Although the Company has attempted to identify important factors that could affect the Company and may cause actual actions, events or results to differ materially from those described herein, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that Forward-Looking Information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on Forward-Looking Information. The Company expressly disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise except as otherwise required by applicable securities legislation.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

More Stories By Marketwired .

Copyright © 2009 Marketwired. All rights reserved. All the news releases provided by Marketwired are copyrighted. Any forms of copying other than an individual user's personal reference without express written permission is prohibited. Further distribution of these materials is strictly forbidden, including but not limited to, posting, emailing, faxing, archiving in a public database, redistributing via a computer network or in a printed form.

Latest Stories
Want to enable self-service provisioning of application environments in minutes that mirror production? Can you automatically provide rich data with code-level detail back to the developers when issues occur in production? In his session at DevOps Summit, David Tesar, Microsoft Technical Evangelist on Microsoft Azure and DevOps, will discuss how to accomplish this and more utilizing technologies such as Microsoft Azure, Visual Studio online, and Application Insights in this demo-heavy session.
Entuity®, a provider of enterprise-class network management solutions, today announced that it solidifies its position as a market leader through global enterprise customer acquisitions and a refined channel strategy. In 2014, Entuity increased new license revenues in EMEA by over 75 percent, and LATAM by over 125 percent as customers embraced Entuity for its highly automated solution and unified architecture. Entuity’s refined channel strategy focuses on even deeper strategic alignment with ke...
We are all here because we are sold on the transformative promise of The Cloud. But what good is all of this ephemeral, on-demand infrastructure if your usage doesn't actually improve the agility and speed of your business? How must Operations adapt in order to avoid stifling your Cloud initiative? In his session at DevOps Summit, Damon Edwards, co-founder and managing partner of the DTO Solutions, will highlight the successful organizational, process, and tooling patterns of high-performing c...
The 4th International DevOps Summit, co-located with16th International Cloud Expo – being held June 9-11, 2015, at the Javits Center in New York City, NY – announces that its Call for Papers is now open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's large...
Cloud Expo 2014 TV commercials will feature @ThingsExpo, which was launched in June, 2014 at New York City's Javits Center as the largest 'Internet of Things' event in the world.
“We help people build clusters, in the classical sense of the cluster. We help people put a full stack on top of every single one of those machines. We do the full bare metal install," explained Greg Bruno, Vice President of Engineering and co-founder of StackIQ, in this SYS-CON.tv interview at 15th Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
"People are a lot more knowledgeable about APIs now. There are two types of people who work with APIs - IT people who want to use APIs for something internal and the product managers who want to do something outside APIs for people to connect to them," explained Roberto Medrano, Executive Vice President at SOA Software, in this SYS-CON.tv interview at Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
In this demo at 15th Cloud Expo, John Meza, Product Engineer at Esri, showed how Esri products hook into Hadoop cluster to allow you to do spatial analysis on the spatial data within your cluster, and he demonstrated rendering from a data center with ArcGIS Pro, a new product that has a brand new rendering engine.
"Blue Box has been around for 10-11 years, and last year we launched Blue Box Cloud. We like the term 'Private Cloud as a Service' because we think that embodies what we are launching as a product - it's a managed hosted private cloud," explained Giles Frith, Vice President of Customer Operations at Blue Box, in this SYS-CON.tv interview at DevOps Summit, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
The Software Defined Data Center (SDDC), which enables organizations to seamlessly run in a hybrid cloud model (public + private cloud), is here to stay. IDC estimates that the software-defined networking market will be valued at $3.7 billion by 2016. Security is a key component and benefit of the SDDC, and offers an opportunity to build security 'from the ground up' and weave it into the environment from day one. In his session at 16th Cloud Expo, Reuven Harrison, CTO and Co-Founder of Tufin,...
“We are strong believers in the DevOps movement and our staff has been doing DevOps for large enterprise environments for a number of years. The solution that we build is intended to allow DevOps teams to do security at the speed of DevOps," explained Justin Lundy, Founder & CTO of Evident.io, in this SYS-CON.tv interview at DevOps Summit, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Media announced that Splunk, a provider of the leading software platform for real-time Operational Intelligence, has launched an ad campaign on Big Data Journal. Splunk software and cloud services enable organizations to search, monitor, analyze and visualize machine-generated big data coming from websites, applications, servers, networks, sensors and mobile devices. The ads focus on delivering ROI - how improved uptime delivered $6M in annual ROI, improving customer operations by minin...
The move in recent years to cloud computing services and architectures has added significant pace to the application development and deployment environment. When enterprise IT can spin up large computing instances in just minutes, developers can also design and deploy in small time frames that were unimaginable a few years ago. The consequent move toward lean, agile, and fast development leads to the need for the development and operations sides to work very closely together. Thus, DevOps become...
Puppet Labs on Wednesday released the DevOps Salary Report, based on salary data gathered from Puppet Labs' industry-recognized State of DevOps Report. The data confirms that market demand for DevOps skills is growing, and that DevOps engineers are among the highest paid IT practitioners today. That's because IT organizations today are grappling with how to be more agile and responsive to the business, while maintaining the stability of their infrastructure. DevOps practices, such as continuous ...
AppDynamics, the application intelligence leader for software-defined businesses, announced the general availability of the AppDynamics Fall '14 Release. Serving the combined needs of IT and business teams across the enterprise, the latest release provides a comprehensive view across all aspects of digital performance in ultra large scale deployments. AppDynamics delivers Application Intelligence by building out advanced capabilities across the key areas of analytics, unified monitoring and D...