Sunridge Gold Announces $837 Million Net Present Value Feasibility Study for
posted on
May 23, 2013 10:12AM
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Sunridge Gold Corp. (SGC:TSX.V/SGCNF:OTCQX) is pleased to announce the completion and positive results of an independent feasibility study (the “Study”) by lead engineer SENET (Pty) Ltd. ("SENET") for its Asmara Project in Eritrea. The Study demonstrates that the mining of all four advanced deposits that make up the Asmara Project (Emba Derho, Adi Nefas, Gupo Gold and Debarwa) and processing of the ore near the large Emba Derho deposit is economically robust with a Net Present Value (“NPV”) of $837 million. The Study outlines a three-phase staged start-up mining plan which would initiate production almost one year earlier than was envisaged in the prefeasibility study. This earlier cash-flow, combined with capital cost reductions, reduces the initial capital requirements to be financed by over $130 million.
As a result of the positive outcome of the Study, Sunridge will continue work towards bringing the Asmara project into production as soon as possible, by completing required environmental studies, applying for the mining license, arranging debt financing, commencing detailed engineering work and hiring new key employees. Management estimates that initial production on the Asmara Project will commence in mid-2015.
Base Case Highlights (all $ equals US dollars):
Michael Hopley, President and CEO of Sunridge Gold states, “We are delighted with the results of the Asmara Project feasibility study which demonstrates even stronger economics and a superior mining plan than the prefeasibility study that was completed a year ago. We have been able to successfully reduce initial capital costs by instituting a 3 phased start-up plan that starts production a year earlier than previously planned. In a little over two years, the Asmara Mine can start production and become a very important producer of copper, zinc, gold and silver for the benefit of Sunridge shareholders and the Eritrean people.”
Conference call details:
The Company will hold a conference call on Thursday, May 16, 2013, at 8:00AM Vancouver/11:00 AM Toronto, New York/4:00PM London, to discuss the Asmara Project feasibility study results. Please call in at least five minutes prior to the conference call start time and simply ask to join the Sunridge call. Dial in details are as follows:
Canada & USA: 1-800-319-4610 (toll free)
International: +1-604-638-5340
Questions during the conference call regarding the Study can be sent to greg@sunridgegold.com.
The conference call will be available for replay until May 23, 2013, by calling Canada & USA toll free 1-800-319-6413, Vancouver local 604-638-9010 and entering passcode 7852 followed by the # sign.
Mining and Production
The Study has concluded that the processing of gold and silver ores from Emba Derho, Gupo Gold and Debarwa by heap-leaching as well as the processing of copper and zinc ores from Emba Derho, Adi Nefas and Debarwa by milling and flotation at facilities near Emba Derho provides the optimum economic scenario. The Emba Derho, Debarwa and Gupo deposits will be mined by open-pit methods and the Adi Nefas deposit by underground mining methods.
The mining plan consists of a 3 phase start up in order to reduce initial capital costs. In Phase I, the high-grade copper (Phase IA) (direct shipping ore “DSO”) will be mined, crushed to less than 10 mm, loaded into containers and transported 120 km to the port facility at Massawa for shipping to a smelter.
In addition, (Phase IB) near surface gold and silver ore will be mined from the Debarwa, Emba Derho and Gupo deposits and trucked to the same crushing facility near Emba Derho and processed in the gold recovery heap-leach facility. The heap-leach facility is located inside the tailings storage facility and available until Year 5 of operations.
During Phase II, supergene copper ores will be mined from both Debarwa and Emba Derho and processed at a central flotation plant at Emba Derho at a nominal rate of 2 million tonnes per annum. Copper concentrate with gold and silver byproduct will be transported to the Port of Massawa and shipped to smelters.
Full Production will be achieved in Phase III. Primary copper and zinc ores from Debarwa, Adi Nefas and Emba Derho deposits will be processed at a flotation plant at Emba Derho at a nominal rate of 4 million tonnes per annum. Copper concentrate with gold and silver byproduct and zinc concentrate will be transported to the port facility at Massawa for shipping to smelters.
Power will be generated onsite using a combination of diesel and medium fuel oil generators. Water supply is sourced from the capture of rainfall in ponds and recycled within the plant.
Phase I - DSO and Gold Production (Year 1 – Year 5)
Phase IA – DSO (Year 1 – Year 2)
Phase IB – Gold production – (Year 1 – Year 5)
Phase II– Supergene Copper Production (Year 2 – Year 3.25)
Phase III Full Production (Year 3.25 – Year 16.3)
Financial Analysis
The base case uses constant metal prices of $3.25/lb copper, $1.00/lb zinc, $1,400/oz gold and $25.00/oz silver.
Table 2: Sensitivity to Metal Prices |
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Base Case Prices |
Low Copper Metal Price |
Low Metal Price |
Current Metal Prices May 10 2013 |
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NPV @ 10% discount (Pretax) | 837 | 728 | 404 | 758 | ||||||||||
IRR | 34% | 31% | 22% | 33% | ||||||||||
NPV @ 0% discount (Pretax) | 1,791 | 1,596 | 1,026 | 1,638 | ||||||||||
Payback | 4.1 | 4.3 | 5.1 | 4.2 | ||||||||||
NPV @ 10% discount (Post- tax) | 443 | 364 | 131 | 386 | ||||||||||
IRR | 27% | 24% | 17% | 26% | ||||||||||
NPV @ 0% discount (Post-tax) | 1,276 | 1,136 | 727 | 1,166 | ||||||||||
Payback | 4.6 | 4.8 | 5.6 | 4.7 | ||||||||||
Metal Prices |
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Copper | 3.25 | 3.00 | 2.75 | 3.35 | ||||||||||
Zinc | 1.00 | 1.00 | 0.80 | 0.83 | ||||||||||
Gold | 1,400 | 1,400 | 1,250 | 1,449 | ||||||||||
Silver | 25.00 | 25.00 | 21.00 | 24.00 | ||||||||||
Operating Costs
On site operating costs average $29.42 per tonne through life of mine.
Table 3: Average Operating Costs |
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Heap-Leach | Flotation | |||||||
Phase IB | Phase II & III | |||||||
Mining $/t ore mined | 2.46 | 13.35 | ||||||
Process $/t ore processed | 8.68 | 17.64 | ||||||
TOTALS | 11.14 | 30.99 | ||||||
Capital Costs
Initial capital costs for the DSO and heap-leach are projected at $46 million. The expansion capital for Phase II and Phase III is an additional $357 million. During the life of mine there will be capital requirements estimated at $227 million and closure costs are estimated at $36 million.
Table 4: Total Capital Expenditures per Phase |
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Phase I | Phase II | Phase III | Total | |||||||||||
$ million | $ million | $ million | $ million | |||||||||||
Pre-strip mining and mining equipment (includes all costs incurred until initiation of copper processing by flotation) – (excludes HL & DSO opex) |
0 | 116.0 | 0 | 116.0 | ||||||||||
Phase I Plant and Equipment | 49.5 | 0 | 0 | 49.5 | ||||||||||
Copper circuit facility | 0 | 113.8 | 0 | 113.8 | ||||||||||
Zinc circuit facility | 0 | 0 | 22.8 | 22.8 | ||||||||||
Site development, utilities and facilities | 3.8 | 55.5 | 5.5 | 64.8 | ||||||||||
Water facilities | 0.04 | 19.4 | 0 | 19.44 | ||||||||||
Tailings facilities | 11.2 | 18.3 | 0.2 | 29.7 | ||||||||||
Debarwa facilities | 0 | 9.8 | 0 | 9.8 | ||||||||||
Adi Nefas facilities | 0 | 3.2 | 0 | 3.2 | ||||||||||
Gupo facilities | 1.1 | 0 | 0 | 1.1 | ||||||||||
Adi Nefas development | 0 | 17.0 | 17.1 | 34.1 | ||||||||||
Engineering, procurement, construction management (EPCM) |
4.1 | 29.8 | 5.2 | 39.1 | ||||||||||
First fills (ie. fuel, reagents etc) | 0.03 | 1.7 | 0 | 1.73 | ||||||||||
Owner’s cost’s | 1.0 | 22.7 | 0 | 23.7 | ||||||||||
Contingency | 5.5 | 21 | 3.6 | 30.1 | ||||||||||
SUBTOTALS | 76.3 | 428.2 | 54.4 | 558.9 | ||||||||||
Sustaining Costs | 56.0 | |||||||||||||
Social Costs | 14.8 | |||||||||||||
Closure Costs | 36.6 | |||||||||||||
TOTAL | 666.3 | |||||||||||||
When the mining license is granted the Government of Eritrea will have a 10% carried interest in the project and ENAMCO (Eritrean National Mining Corporation) will be purchasing an additional 30%. ENAMCO will therefore be responsible for 33.33% of all capital and operating costs of the mine.
Table 5: Mineral Reserves by Classification |
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Rock type | Tonnes (kt) |
copper (%) |
zinc
(%) |
gold
(g/t) |
silver (g/t) |
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Proven | |||||||||||||||||
Emba Derho Primary | 4,337 | 0.9 | 1.7 | 0.2 | 11.6 | ||||||||||||
Debarwa Oxide | 1 | - | - | 1.0 | 6.7 | ||||||||||||
Debarwa Transition | 94 | - | - | 4.3 | 84.1 | ||||||||||||
Debarwa Supergene | 423 | 8.9 | 0.2 | 2.2 | 53.2 | ||||||||||||
Debarwa Primary | 6 | 1.6 | 2.8 | 0.6 | 15.6 | ||||||||||||
Total proven | 4,861 | ||||||||||||||||
Probable |
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Emba Derho Supergene |
1,200 | 1.0 | 0.4 | 0.3 | 14.9 | ||||||||||||
Emba Derho Primary | 44,497 | 0.7 | 1.6 | 0.3 | 9.2 | ||||||||||||
Debarwa Oxide | 163 | - | - | 1.6 | 8.2 | ||||||||||||
Debarwa Transition | 428 | - | - | 2.5 | 17.0 | ||||||||||||
Debarwa Supergene | 888 | 2.5 | 0.2 | 1.0 | 22.9 | ||||||||||||
Debarwa Primary | 514 | 1.9 | 4.0 | 1.1 | 25.4 | ||||||||||||
Adi Nefas Primary | 1,682 | 1.6 | 8.2 | 2.8 | 96.5 | ||||||||||||
Gupo Oxide | 399 | - | - | 1.9 | - | ||||||||||||
Gupo Sulfide | 66 | - | - | 2.4 | - | ||||||||||||
Total Probable | 51,723 | ||||||||||||||||
Total Proven and Probable |
56,584 | ||||||||||||||||
The mineral reserves listed in Table 5 were created for Emba Derho, Debarwa and Gupo by generating Net Smelter Return (NSR) values (revenue minus royalty and smelting/selling costs) for each metal using Measured and Indicated Resources only. The net revenue of each block was compared to total cost. Each mining block becomes economical and is included in the processing schedule if it is above the total combined cost of processing, general administrative and applicable transport.
In the case of the Adi Nefas underground mine the mineral reserves were generated through a sequential process of NSR calculation, stope optimization, stope design, and development design. Stope optimization was applied using Snowden’s Stopesizor software which modifies the resource to reflect minimum mining width for the NSR. The outcome is a set of blocks that reflect this recoverable resource. Unplanned dilution was added to the model through adding a fixed width of over break waste into the planned stopes.
The mineral reserve listed in Tables 5 was generated from the Measured and Indicated resource after the application of the economic cut-off grades for each rock type, open-pit design, external dilution and recovery parameters.
Social and Environmental Studies
Social and environmental baseline studies and stakeholder engagement programs are well advanced on all four deposits that are included in the Study. This work has been completed to comply with the Equator Principles and the International Finance Corporation Performance Standards for Social and Environmental Impact Assessment Studies, as well as the Eritrean Government “National Environmental Assessment Procedures & Guidelines”. The work is being carried out by the Sunridge social and environmental staff and consultants (both international and national) and will lead to the publications of a Social and Environmental Impact Assessment (SEIA). It is expected that the SEIA will be completed and submitted to the government in September 2013.
Project Location and Access
All four deposits included in the Study are located within a 30 minute drive on paved roads from the capital city of Asmara with close proximity to power, water and an international airport. In addition, the Red Sea port city of Massawa is approximately 120 kms east of Asmara via paved road.
Project Opportunities
Opportunities to further enhance the economic value of the Asmara project will be investigated during an early phase of detailed engineering as part of Engineering, Procurement and Construction, Management (EPCM).
Sunridge will investigate opportunities to optimize process rates with existing equipment and increase value in the process schedule while reducing operating and cash flow risks.
Sunridge will continue to explore and evaluate other deposits and targets in the vicinity.
Feasibility Study Report
The Asmara Feasibility Study is NI 43-101 compliant and was completed by lead engineering company SENET under the direction of David Chambers, P.Eng (MBA) and approved by Neil Senior, P.Eng. with support from Snowden Group Inc. on mine design and mine planning and work by Knight Piésold Ltd. on water and waste management. Blue Coast Metallurgy Ltd. directed metallurgical test-work. The report will be filed on the Company’s profile on www.sedar.com within 45 days of this press release.
Qualified Person
The Asmara feasibility study results were reviewed by SENET under the direction of Study Manager, David Chambers, an Independent Qualified Person within the meaning of NI 43-101.
Michael Hopley, President and CEO of Sunridge Gold Corp. is the Company’s Qualified Person responsible for the contents of this press release and has reviewed the information in the release and confirmed that it is consistent with that provided by the independent Qualified Person responsible for the Study.
About Sunridge:
Sunridge is a mineral exploration and development company focused on the acquisition, exploration, discovery and development of base and precious metal projects on the Asmara Project in Eritrea and exploration properties in Madagascar. Sunridge currently has approximately 175 million shares outstanding and trades on the TSX Venture Exchange under the symbol SGC. For additional information on the Company and its projects please view the slide show on our website at www.sunridgegold.com or call Greg Davis at the numbers listed below.
SUNRIDGE GOLD CORP. |
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“Michael Hopley” | For further information contact: | ||
Michael Hopley, President and Chief Executive Officer | Greg Davis, VP Business Development | ||
Email: greg@sunridgegold.com Tel: 604-688-1263 (direct) |
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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.
This news release contains forward-looking statements that are based on the Company’s current expectations and estimates. Forward-looking statements are frequently characterized by words such as “plan”, “expect”, “project”, “intend”, “believe”, “anticipate”, “estimate”, “suggest”, “indicate” and other similar words or statements that certain events or conditions “may” or “will” occur. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from estimated or anticipated events or results implied or expressed in such forward-looking statements. Such factors include, among others: the actual results of current exploration activities; conclusions of economic evaluations; changes in project parameters as plans to continue to be refined; possible variations in ore grade or recovery rates; accidents, labor disputes and other risks of the mining industry; delays in obtaining governmental approvals or financing; and fluctuations in metal prices. There may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.
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