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Mexico
Los Verdes Project

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 Location:
195 km SE from Hermosillo, Sonora, Mexico

  Project Contacts:
Calle Pedro Moreno #24, Int. Segundo Piso Col. Centro
Hermosillo
Sonora, Mexico
CP 83000
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusInactive / Suspended
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
  • Tungsten
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life7 years (as of Jan 1, 2012)
The Company is currently considering strategic alternatives for the Los Verdes project based on current industry/market expectations and a resizing of the planned operation.


Owners

 
CompanyInterestOwnership
Minera Alamos Inc. 100 % Indirect
Molibdeno Los Verdes S.A. de C.V. 100 % Direct

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Porphyry


Summary:

Los Verdes contains molybdenum-(copper-tungsten) mineralization in breccias related to felsic intrusive rocks. A number of features of the deposit appear to place it in the category of a molybdenum-bearing breccia pipe related to a larger porphyry copper-molybdenum system. The indicative features are postintrusive breccias with interstices partly filled by fine-grained tourmaline, molybdenite, copper and varying amounts of tungsten and base-metals minerals, and late quartz-pyrite. Although Los Verdes has a tabular form, rather than pipe-shaped, it meets the definition of this type of deposit.

The mineralization at Los Verdes is of magmatic-hydrothermal origin, consisting originally of sulfide minerals, principally chalcopyrite, pyrite, and molybdenite, and apparently related to the granodiorite. Weathering near the surface has converted some of the mineralization to an oxide facies (principally ferromolybdite plus iron oxides). Some of the metals liberated by oxidation of sulfides have percolated downward, and have re-precipitated as secondary sulfides, mainly chalcocite, in the vicinity of hypogene sulfide minerals.

The mineralized zone on the Los Verdes property is about 300 meters northeast-southwest, and 200 meters northwest-southeast. Its eastern edge is at the Moly Pit, where it is cut off by the Buena Vista Fault. The mineralized zone is centered beneath the ridge extending southwest from the Moly Pit.

The Los Verdes mineralization is c ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mine at Los Verdes will be accessed using conventional truck-shovel open pit mining techniques. Open pit mining operations will be based on a 21 hour per day, 6 days per week schedule for a nominal production rate of approximately 3500 tonnes per day. Mineralised material will be drilled and blasted on 5 meter high benches using a staggered blast hole pattern. Wherever possible waste will be drilled using 10 meter high benches using a wider blast hole spacing. All blasting will be performed using bulk ANFO (ammonium nitrate/fuel oil) explosives.

Primary loading equipment will be hydraulic excavators paired with articulated haul trucks. A preliminary waste storage location has been located approximately 1.5 km southwest of the open pit area. Mineralised material will be hauled by the mine trucks approximately 1.5 km to the main processing plant location. It has been assumed that all mining operations will be performed and directly supervised by a capable Mexican mining contractor.


Crushing and Grinding


Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. Annual
Copper Metal in concentrate M lbs 13
Copper Concentrate kt 18
Molybdenum Metal in concentrate M lbs  ......  Subscription required
Molybdenum Concentrate kt  ......  Subscription required
Silver Metal in concentrate oz  ......  Subscription required

* According to 2012 study.

Reserves at January 20, 2012:

CategoryTonnage CommodityGrade
Measured 6,278,000 t Copper 0.67 %
Measured 6,278,000 t Molybdenum 0.13 %
Measured 6,278,000 t Tungsten 0.07 %
Measured 6,278,000 t Silver 4.91 g/t
Indicated 1,427,000 t Copper 0.51 %
Indicated 1,427,000 t Molybdenum 0.1 %
Indicated 1,427,000 t Tungsten 0.05 %
Indicated 1,427,000 t Silver 4.02 g/t
Measured & Indicated 7,705,000 t Copper 0.64 %
Measured & Indicated 7,705,000 t Molybdenum 0.12 %
Measured & Indicated 7,705,000 t Tungsten 0.07 %
Measured & Indicated 7,705,000 t Silver 4.74 g/t
Inferred 208,000 t Copper 0.07 %
Inferred 208,000 t Molybdenum 0.12 %
Inferred 208,000 t Tungsten 0.02 %

Commodity Production Costs:

CommodityUnits2022
All-in costs Copper USD -0.73 / lb *†  USD
Assumed price Tungsten USD 20,000 / t *  USD
Assumed price Molybdenum USD 15 / lb *  USD
Assumed price Copper USD 2.5 / lb *  USD
Assumed price Silver USD 20 / oz *  USD
* According to 2012 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2022
OP mining costs ($/t mined) USD 4.18 *
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2012 study.
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2012 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 130.9
G&A costs $M USD 14.4
Total OpEx $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameRef. Date
....................... Subscription required ....................... Subscription required Oct 22, 2021
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Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2012
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