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Press release from Marketwire

Sunridge Gold Announces Positive Pre-Feasibility Study for the Asmara North Project, Eritrea

Wednesday, May 02, 2012

Sunridge Gold Announces Positive Pre-Feasibility Study for the Asmara North Project, Eritrea07:30 EDT Wednesday, May 02, 2012VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 2, 2012) - Sunridge Gold Corp. (TSX VENTURE:SGC)(OTCQX:SGCNF) is pleased to announce the completion and positive results of an independent pre-feasibility study (the "Study") by lead engineer Snowden Mining Industry Consultants Inc. ("Snowden") for its 100% owned Asmara North project in Eritrea. The Study has concluded that operating all four deposits of the Asmara Project (Emba Derho, Adi Nefas, Gupo Gold and Debarwa) as an integrated operation with ore being processed at a single central mill is technically feasible and is the optimum economic situation (see Project Map: http://media3.marketwire.com/docs/sgc52.pdf). The Study recommends that the project be advanced to a feasibility study.Base Case Highlights:Net Present Value ("NPV") of $555 million at a 10% discount (pre-tax base case) (NPV @ 0% discount - $1,642 million)Internal rate of return (IRR) - 27%Payback - 3.5 yearsBase Case metal prices used - US$3.28/lb copper, US$0.99/lb zinc, US$1,111/oz gold, US$21.00/oz silverInitial capital cost estimate - $489 million including a contingency and owners costsOn site operating costs - $25.78 per tonne average through life of mineAverage annual metal production -56.9 million pounds (25,900 tonnes) of copper136.0 million pounds (61,800 tonnes) of zinc26,000 ounce of gold695,000 ounces of silverTotal metal production -804 million pounds (365,000 tonnes) of copper1.789 million pounds (812,000 tonnes) of zinc415,000 ounces of gold11 million ounces of silverLife of Mine - 15.25 yearsMichael Hopley, President and CEO of Sunridge Gold, states, "We are very pleased with the results of the prefeasibility study - the outcomes have certainly exceeded our expectations and provide significant shareholder value. We are particularly pleased that the Study has outlined an operating scenario in which all four deposits of the Asmara Project are developed in an integrated way with all ore being processed in a single centralized mill near the Emba Derho deposit. This is a major step forward for the project. We have started work on the recommended feasibility study."Mining and ProductionThe Study has concluded that mining and processing all four deposits of the Asmara Project (Emba Derho, Adi Nefas, Gupo Gold and Debarwa) into a single integrated operation with ore being processed at a single central mill near the Emba Derho Deposit is the optimum economic situation and is technically feasible. The Emba Derho, Debarwa and Gupo deposits will be mined by open-pit methods and the Adi Nefas deposit by underground mining methods.Management estimates that initial production at Asmara North will commence in the first quarter of 2016. This allows time for completion of the feasibility study, permitting, financing and construction.During the 13.25 peak years of base metal production (Phase II, beginning in Year 2 through Year 15) the Asmara North mine is projected to produce an average of 57.3 million pounds (26,000 tonnes) of copper, 143.3 million pounds (65,000 tonnes) of zinc, 24,000 ounces of gold and 787,000 ounces of silver per year. Production is divided into three phases as follows: Phase I (Year 0 - Year 1.25) Mine and process 2.4 million tonnes of copper supergene ore from Debarwa and Emba Derho at a rate of 2 million tonnes per year for 1.25 years Phase I recoveries - 84% copper, 52% gold, 46% silver Copper concentrate - 22% copper, 3.7 g/t gold, 101 g/t silver Phase I operating costs average $54.77 per tonne (includes mining, process, G&A) Phase II (Year 1.25 - Year 14.5) Mine and process 53 million tonnes of primary copper and zinc ore from Emba Derho, Debarwa, and Adi Nefas at a rate of 4 million tonnes per year for 13.25 years Final Waste/Ore ratios - 2.4:1 at Emba Derho and 9.0:1 at Debarwa Adi Nefas to be mined using underground long hole bench retreat with waste fill method ranging between 140,000 and 460,000 tonnes per year for a total of 1.675 million tonnes mined over 6 years and blended with ore from Emba Derho Adi Nefas average mining cost - $80/tonne Phase II recoveries average 84% copper, 84% zinc, 48% gold, 45% silver Copper concentrate average - 25.5% copper, 9.4 g/t gold, 307 g/t silver Zinc concentrate average- 60.5% zinc Phase II operating costs average $23.72 / tonne (includes mining, process, G&A) Phase III (Year 14.5 - Year 15.25) Mine and process by Carbon in Pulp (CIP) Gold plant at Emba Derho 1.61 million tonnes of gold ore from Gupo Gold and process stockpiled gold caps from Emba Derho and Debarwa. Gupo waste/ore ratio - 3.25:1 Phase III gold recoveries average 81% gold, 75% silver Phase III operating costs average $49.39 per tonne (includes mining, process, G&A) Table 1: Production SchedulePhase IPhase IIPhase IIIYear 0 - Year 1.25Year 1.25 - Year 14.5Year 14.5 - Year 15.25Million tonnes per year242Million pounds copper per year97.9 (in concentrate)57.3 (in concentrate)-Million pounds zinc per year-143.2 (in concentrate)-Ounces of gold per year24,000 (in concentrate)24,000 (in concentrate)46,000 (in doré)Ounces of silver per year620,000 (in concentrate)787,000 (in concentrate)328,000 (in doré)Metallurgy and ProcessingAll ore from the different deposits will be milled and processed in a single plant located at the Emba Derho deposit. Processing of the three ore types (copper supergene, primary copper and zinc and gold oxide) will utilize a common crushing and ball milling circuit which includes high pressure grinding rolls (HPGR) and three different processing circuits. The initial Phase I plant will process supergene ore at a nominal two million tonnes per annum rate by a conventional flotation process to recover copper and byproduct gold as a copper concentrate for sale to smelters. This is followed by Phase II processing of primary ores at a nominal four million tonnes per annum rate producing copper, zinc, and byproduct gold and silver as concentrates for direct sale to smelters. The Phase III plant reduces to a nominal two million tonnes per annum rate to extract gold and silver from oxide ore using conventional cyanide leaching and recovery by the carbon in pulp process to produce gold and silver doré. The tailing systems will be common for all three ore types.The first year of production produces copper concentrate with gold and silver credits, continuing until Year 14 and the production of zinc concentrate will begin in Year 1 through Year 14. Gold and silver extraction to a doré product occurs in the last half of Year 14 and completes in Year 15.Financial Analysis (all $ equals US dollars)The base case uses constant metal prices of $3.28/lb copper, $0.99/lb zinc, $1,111/oz gold and $21.00/oz silver, which are derived from the 5 year average as of April 25, 2012.Table 2: Sensitivity to Metal PricesBase Case Prices 5 year Average3 year Average Metal PricesCurrent Metal Prices April 25, 2012NPV @ 10% discount (Pretax)$555 million$648 million$788 millionIRR @ 10%27%29%33%NPV @ 0% discount (Pretax)$1,642 million$1,839 million$2,135 millionPayback3.5 years3.2 years2.9 yearsMine Life15.25 years15.25 years15.25 years Metal Prices Copper$3.28/lb$3.47/lb$3.75/lbZinc$0.99/lb$0.99/lb$0.90/lbGold$1,111/oz$1,335/oz$1,629/ozSilver$21/oz$25/oz$30.18/ozOperating CostsOn site operating costs average $25.78 per tonne through life of mine.Table 3: Average Operating CostsPhase IPhase IIPhase IIIYear 0 - Year 1.25Year 1.25 - Year 14.5Year 14.5 - Year 15.25Mining $/t ore mined$26.60$8.28$19.26Process $/t ore processed$21.86$12.86$19.46G&A $/t ore processed$6.31$2.66$10.67TOTALS$54.77$23.72$49.39Capital CostsInitial capital costs are projected at $489.3 million (including owner's costs and a contingency of $44.5 million). The expansion capital for Phase II and Phase III is an additional $69.4 million. During the life of mine there will be sustaining capital requirements of about $77.6 million and closure costs are estimated at $48.4 million.Table 4: Capital CostsPhase IPhase IIPhase IIICapital costsExpansion capital costs funded by cash flowExpansion capital costs funded by cash flowYear 0 - Year 1.25Year 1.25 - Year 14.5Year 14.5 - Year 15.25$ million$ million$ millionPre-strip mining and mining equipment105.7--Copper circuit facility106.9--Zinc circuit facility-16.3-CIP plant--18.9Site development, utilities and facilities71.35.30.70Tailings facilities26.0--Debarwa facilities4.0--Adi Nefas facilities7.5--Gupo facilities--2.7Adi Nefas development62.2--Engineering, procurement, construction management (EPCM)29.25.24.8First fills (ie. fuel, reagents etc)12.73.61.6Owner cost19.2--Contingency44.55.44.9TOTALS489.335.833.6When the mining license is granted, following completion of a feasibility study, the Government of Eritrea will have a 10% carried interest in the project and has the option to purchase up to a 30% working interest. It is not known at this time if the government intends to exercise that option and the economics and financial analysis of the Study assumes a 100% interest by Sunridge.Mineral ReservesThe Study used the recently completed estimate of Measured and Indicated Resources for the Asmara Project as reported in the Company's press release dated April 10, 2012 (see news release for additional details).Tables 5 and 6 below summarize the Mineral Reserves included in the Study broken down by both ore type and classification.Table 5: Minerals Reserves by Ore StreamOre streamRock typeTonnes (kt)copper (%)zinc (%)gold (g/t)silver (g/t)Phase IEmba Derho1,1941.00.20.212.6SupergeneDebarwa1,2044.50.11.331.2Total2,3982.70.10.721.9Emba Derho51,5000.61.60.29.3Phase IIDebarwa1422.23.91.225.9PrimaryAdi Nefas1,6751.68.62.999.8Total53,3170.71.80.312.1Emba Derho Oxide623--1.74.4Debarwa Oxide136--2.010.1Phase IIIDebarwa Transition466--3.134.6Gold oreGupo Oxide299--2.2-Gupo Sulfide82--2.5-Total1,6072.312.6Total57,322Table 6: Mineral Reserves by ClassificationReserve ClassificationRock typeTonnes (kt)copper (%)zinc (%)gold (g/t)silver (g/t)Emba Derho Primary4,4430.81.70.311.6Debarwa Oxide2--2.322.3ProvenDebarwa Transition103--4.386.1Debarwa Supergene3759.20.12.253.06Debarwa Primary72.0200.716.3Total4,930Emba Derho Oxide623--1.74.4Emba Derho Supergene1,1941.00.20.212.6Emba Derho Primary47,0570.61.60.29.0Debarwa Oxide134--2.09.9Debarwa Transition363--2.820.0ProbableDebarwa Supergene8282.40.11.021.3Debarwa Primary1352.24.11.226.4Adi Nefas Primary1,6751.68.62.9100.0Gupo Oxide299--2.2-Gupo Sulfide82--2.5-Total52,393Total57,322The mineral reserves listed in Table 5 and 6 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. Metal prices used were $2.85/lb copper, $0.80/lb zinc, $1,150/oz gold and $18.50/oz silver. The net revenue of each block was compared to total cost. Each mining block becomes economical and included in the processing schedule and becomes part of the mineral reserves if it is above the total cost of processing, general administrative and applicable transport.In the case of the Adi Nefas underground mine the mineral reserves were generated, using the same metal prices as above, 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.Social and Environmental StudiesSocial 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 Social and Environmental Impact Assessments (SEIA) in June 2012 (Debarwa) and June 2013 (Asmara North) projects.Project Location and AccessAll four deposits included in the Study are located within a 30 minute drive on paved roads outside 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 120 kilometers east of Asmara via paved road.Project OpportunitiesOpportunities to further enhance the economic value of the Asmara North project will be investigated during the feasibility study which is targeted for completion in the first quarter of 2013. The following opportunities could significantly enhance the value of the project:Increase process rate to reduce life of mine from 15 years to approximately 10 years while still maintaining the ability to process all ore types through a single mill; Heap leach processing of gold and silver oxide ores in the early years of production after receipt of current column leach test work results; Increase resource confidence and pit expansion based on additional drilling at the Gupo and Debarwa deposits particularly for gold and silver oxide ore types; Power plant location alternatives and optimization, considering alternate locations for power generation and technology to reduce power demand and cost; and Water supply alternatives and alternate technology to reduce water demand. Pre-Feasibility Study ReportThe Asmara North Prefeasibility Study is NI 43-101 compliant and was completed by Snowden Mining Industry Consultants Inc.("Snowden") and GBM Minerals Engineering Consultants Ltd. ("GBM") with work by Knight Piesold Ltd. for tailings facility design and waste management and Blue Coast Metallurgy for metallurgical work. The report will be filed on the Company's profile on www.sedar.com within 45 days of this press release.Qualified PersonThe Asmara North Pre-feasibility study results were reviewed by Snowden under the direction of Study Manager, Anthony Finch, P.Eng., an Independent Qualified Person. The scientific and technical information in this release has been reviewed and approved by Ian Jackson, C.Eng., of GBM, and Ken Brouwer, P.Eng., of Knight Piesold, both of whom are Independent Qualified Persons 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 117 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.Michael Hopley, President and Chief Executive OfficerThis 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.FOR FURTHER INFORMATION PLEASE CONTACT: Greg DavisSunridge Gold Corp.VP Business Development604-688-1263 (direct)greg@sunridgegold.comwww.sunridgegold.comNeither 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.