West Kirkland Mining Inc. (TSX VENTURE:WKM) reports a new Mineral Resource and a Preliminary Economic Assessment on its TUG Project, Utah. The resource estimate and PEA were prepared in conformance with NI 43-101 by Roscoe Postle Associates USA Ltd. The study predicts a 26% after-tax IRR and $9 million NPV(8%) at $1,525 gold/ $28 silver, and an in-pit indicated resource of 114,000 ounces gold plus 5.4 million ounces silver with an inferred resource of 3,000 ounces gold plus 298,000 ounces silver. Initial capital cost is projected to be $24 million. Note that all funds are stated in US$.
R. Michael Jones, West Kirkland President and CEO said, “Our completion of the Resource and Preliminary Economic Assessment for the TUG gold project shows the potential for production when a $1,500 gold price over four to five years is achievable. At the current time we will continue conserving a $1.0 million working capital position and are now assessing opportunities for acquisition of additional gold and silver assets. We are targeting projects that are a logical addition to TUG and where we can use our expertise in exploration and into operations.”
Highlights of the PEA
RPA’s economic assessment has focused on the most economical part of the Mineral Resource, which is based on heap leach processing as outlined in Table 4. The processing method selected for the PEA was determined by comparing the milling and heap leaching cash flow analyses.
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Table 1 TUG PEA Preliminary Economic Assessment April 30, 2013
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Gold Price $1,525/oz
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Silver Price $28/oz
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Total Rock 15.6 million tonnes
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Waste Rock 11.4 million tonnes
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Mineralized Material (non-diluted) Indicated 3.94 million tonnes
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Mineralized Material (non-diluted) Inferred 0.26 million tonnes
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Stripping Ratio 2.7:1 (waste to
mineralized)
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Average Processing Rate 3,000 tpd (heap leach)
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Gold Recovery 58%
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Silver Recovery 15%
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Initial Capital (includes Contingency & Bonding) $24 million
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Contingency (25%) $4.7 million
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Environmental Bonding Estimate $1.7 million
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Cash Operating Cost per ounce Gold Equivalent $902 per ounce (AuEq)
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Mine Life 4 years
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IRR (pre-tax) 33%
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NPV (pre-tax, 8% discount rate) $12 million
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IRR (after-tax) 26%
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NPV (after-tax, 8% discount rate) $9 million
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The economic analysis is based in part on Inferred Resources and is preliminary in nature. Inferred Resources are considered too geologically speculative to have mining and economic considerations applied to them or to be categorized as Mineral Reserves. There is no certainty that economic forecasts on which this Preliminary Economic Assessment is based will be realized. The complete PEA technical report on the TUG property will be filed on SEDAR within 45 days of this release.
RPA prepared a sensitivity analysis of IRR and NPV to gold and silver prices:
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Table 2 TUG Economic Sensitivity Analysis
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Base Case
Sensitivities to Au/Ag Au-$1,300 Au-$1,525 Au-$1,700
Prices Ag-$23 Ag-$28 Ag-$29
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Pre-Tax IRR % 4% 33% 45%
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Pre-tax NPV at 8% discount
rate $ Million $ (2) $ 12 $ 20
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After-Tax IRR % 2% 26% 36%
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After-Tax NPV at 8%
discount rate $ Million $ (3) $ 9 $ 15
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After acquiring TUG as part of a land package in Nevada, West Kirkland has developed the deposit from a historic resource of approximately 50,000 ounces of gold to an NI 43-101 compliant resource containing 131,000 ounces gold plus 6.3 million ounces silver in the indicated category and 111,000 ounces gold plus 4.3 million ounces silver in the inferred category. To meet its 60% earn-in requirement with Newmont, the Company has spent over $4 million at TUG and, subject to Newmont’s confirmation of the earn-in expenditures, is currently forming a joint venture with Newmont to advance the project.
TUG Project Opportunities
RPA has identified several opportunities which have the potential to improve the TUG Project. These include:
-- Drilling more twinned drill holes to investigate whether gold and silver
grades are under-reported in some of the historical reverse circulation
drill;
-- Re-assaying pulps from some historical drill holes that have a known low
bias for silver;
-- RPA recommends that a comprehensive metallurgical testing program be
completed for the Project which might lead to improved recoveries;
-- RPA recommends improving the accuracy of capital and operating cost
estimates, optimizing the mining schedule, and investigating alternative
crushing processes such as high pressure grinding rolls or vibration
cone crushers, all of which have the potential to improve the project
economics;
-- Investigate milling after the mine has operated with a heap leach, which
would achieve higher gold and silver recoveries from mineralized
material, potentially doubling the current economically mineable portion
of the mineral resource, and allowing further recovery of gold and
silver from leached material; and
-- Perform work on the adjacent KB deposit and other nearby exploration
targets to allow their inclusion in the TUG project.
Mineral Resource Estimate
RPA’s Mineral Resource estimate is based on an open pit mining scenario. A potentially minable Mineral Resource is reported at a $17/tonne net smelter return (NSR) cut-off within a preliminary Whittle pit shell.
TABLE 3 - MINERAL RESOURCE ESTIMATE - APRIL 30, 2013
Category Tonnes Gold Silver Gold Silver
t (000) (g/t) (g/t) (oz) (oz)
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Indicated 4,846 0.84 40.4 131,000 6,297,000
Inferred 4,400 0.79 30.3 111,000 4,271,000
Notes:
1. Mineral resources that are not mineral reserves do not have demonstrated
economic viability
2. CIM definitions are followed for classification of Mineral Resources
3. Mineral Resources are estimated using a gold price of $1,700 per ounce
and a silver price of $29 per ounce
4. Gold and silver recovery factors of 90% and 60% respectively are used
5. High grade assays are capped at 10 g/t Au and 500 g/t Ag
6. Tonnage factor for mineralization was 2.55 t/m3
7. Resources are constrained by a Whittle shell and reported at a $17/t NSR
cut-off
8. Totals may not represent the sum of the parts due to rounding
9. The Mineral Resource Estimate was prepared by Luke Evans, M.Sc, P.Eng,
RPA, April 30, 2013
TABLE 4 - ECONOMICALLY ASSESSED RESOURCE - APRIL 30, 2013
Category Tonnes Gold Ag AuEq(i) Gold Ag
t (000) (g/t) (g/t) (g/t) (oz) (oz)
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Indicated 3,944 0.90 42.8 1.69 114,000 5,427,000
Inferred 255 0.42 36.32 1.09 3,000 298,000
Notes:
1. CIM definitions are followed for classification of Mineral Resources
within the pit used for the economic analysis
2. Mineral Resources are estimated using a gold price of $1,700 per ounce
and a silver price of $29 per ounce
3. Heap Leaching gold and silver recovery factors of 58% and 15%,
respectively are used
4. Tonnage factor for mineralization was 2.55 t/m3
5. No dilution applied to mineral resources, 97% mining recovery used
6. Resources are constrained by a Whittle shell and reported at a $8.05/t
NSR cut-off for heap leaching
7. Totals may not represent the sum of the parts due to rounding
8. The Mineral Resource Estimate used in the economic analysis was prepared
by Luke Evans, M.Sc, P.Eng, RPA, April 30, 2013
9. AuEq was calculated using the following formula: AuEq = Au grade + Ag
Grade (i) 0.0183
Adjacent Properties
West Kirkland holds two large scale option positions in the Long Canyon Trend of Nevada and Utah from Newmont and Rubicon Minerals. Included in the Newmont Option agreement is the adjacent KB Property which features a historic mineral resource containing 40,000 ounces of gold in 1.73 million tonnes grading 0.72 g/t Au with a 0.34 g/t Au cut-off. The reader is cautioned that a qualified person has not done sufficient work to classify the historical estimate as current mineral resources and the issuer is not treating the historical estimate as current mineral resources. Additional work is required to make this estimate current. The Company intends to assess the KB deposit to determine its impact on the economic potential of the TUG project. The Company has also recently identified exploration targets in its Long Canyon Trend properties that may provide additional sources of feed for any mine developed in the northern portion of the Long Canyon Trend. For further details on properties held by West Kirkland please visit the Company’s website.
Background to the TUG Property
The TUG property comprises an outcropping gold and silver deposit in the Long Canyon Trend, north-west Utah. The deposit has structural features similar to those at Newmont’s nearby 2.6 million ounce Long Canyon property. TUG was discovered and extensively drilled in the 1980s and 1990s by various owners including Noranda and Western States Minerals Corporation. West Kirkland optioned TUG in 2010 from Fronteer as part of a large land package in the Long Canyon Trend.
Authors and Qualified Persons Statement
The PEA and Mineral Resource Estimate were prepared in conformance with NI 43-101 by Roscoe Postle Associates USA Ltd (RPA). The report was prepared by Stuart Collins, P.E., Kathy Altman, P.E., Ph.D., and Luke Evans, P.Eng, each a “Qualified Person” under NI 43-101 and who have supervised the preparation of the information that forms the basis of the written disclosure in this news release. Input for the PEA was provided by Newfields (civil and heap leach), Gault Group (environmental & permitting), and Hansen Allen & Luce (hydrogeology).
About West Kirkland Mining
West Kirkland Mining was formed in 2010 to focus on gold exploration along major trends in North America. The Company has consolidated significant mineral rights positions within the major gold trends of Nevada/Utah. The founders and Board of West Kirkland Mining have forty years` successful experience in gold discovery, mine development and mine operations in Nevada and other gold producing jurisdictions in North America.
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