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Canada
New Prosperity Project

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 Location:
126 km SW from Williams Lake, British Columbia, Canada

  Project Contacts:
15th Floor, 1040 West Georgia St.
Vancouver
British Columbia, Canada
V6E 4H1
Phone  ...  Subscription required
Fax778 373 4534
WebsiteWeb
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  • Overview
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  • Mining
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
Mine Life20 years (as of Jan 1, 2007)


Owners

 
CompanyInterestOwnership
Taseko Mines Ltd. 100 % Direct

Deposit Type

  • Porphyry


Summary:

The Prosperity deposit is predominantly hosted in Cretaceous andesitic volcaniclastic and volcanic rocks which are transitional to a sequence of sparsely mineralized, volcanically-derived sedimentary rocks to the south. The andesitic volcaniclastics are comprised of coarse-grained crystal tuff and ash tuff, and thinly bedded tuff with lesser lapilli tuff. The upper eastern portion of the deposit is hosted by subvolcanic units of crowded feldspar porphyritic andesite and thick feldspar and hornblende porphyritic flows.

Gold-copper mineralization within the Prosperity deposit is intimately related to potassium silicate alteration and a later, superimposed sericite-iron carbonate alteration. This is particularly true within a central, east-west trending ovoid zone that hosts the majority of the mineralization.

Chalcopyrite-pyrite mineralization and associated copper and gold concentrations are distributed relatively evenly throughout the host volcanic and intrusive units in the deposit. A sedimentary unit, which is located in the upper southeastern part of the mineralized zone, is sparsely mineralized. Post mineralization porphyritic dikes are essentially barren.

Pyrite and chalcopyrite are the principal sulphide minerals and are accompanied by: minor amounts of bornite and molybdenite; sparse tetrahedrite-tennantite, sphalerite and galena; and rare chalcocite-digenite, covellite, pyrrhotite, arsenopyrite and marcasite. Native gold generally occurs as inclusions in, and along microfractures with, copper sulphides and pyrite. Pyrite to chalcopyrite ratios throughout most of the proposed pit area range from 0.5:1 to 1:1 and rise to 3:1 or higher around the periphery of the deposit which coincides with the propylitic, and locally the phyllic, alteration zones.

Sulphide minerals show the thoroughly dispersed mode of occurrence characteristic of porphyry copper deposits. Sulphides occur in relatively equal concentrations as disseminations, blebs and aggregates in mafic sites, as fracture fillings and as veinlets. Disseminated sulphide mineralization is marginally more prevalent than veinlets in intrusive rocks while in volcanic rocks the reverse was noted.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Prosperity open pit will be a nominal 525 m deep when complete.

The mine will operate using electric cable shovels and rotary drills. Diesel electric trucks and a support equipment fleet will gradually be increased to match the production schedule that will peak in terms of total production in Year 7 through Year 9 at 200,000 tpd.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

The process design is conventional and consists of SAG and ball mill grinding; bulk sulphide flotation, regrind and bulk rougher/scavenger cleaner flotation, cleaner flotation and concentrate dewatering. The concentrator is designed to operate 24 hours per day, 365 days per year.

The Prosperity crushing circuit has been designed to crush on average 70,000 t/d of run-of-mine ore from minus 1,000 mm to 100% passing 350 mm and 80% passing 150 mm at a nominal rate of 4,444 tonnes/hr. The crushing system will consist of a single 1.52 x 2.79 m gyratory crusher operating at 75% utilization per 21 hour day, 365 days per year basis. The primary crusher will be located near the east corner of the ultimate pit boundary.

The primary grinding circuit will be designed to process an average of 70,000 tonnes/day at 90% utilization on a 24 hour per day, 365 day per year basis. The grinding circuit will be designed to reduce the crushed ore from 80% passing 150 mm to 80% passing ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Copper Recovery Rate, %  ......  Subscription required
Copper Head Grade, % 0.22
Gold Recovery Rate, %  ......  Subscription required
Gold Head Grade, g/t 0.43
Subscription required - Subscription is required.

Projected Production:

CommodityUnitsAvg. AnnualLOM
Copper k lbs 107,0002,048,459
Gold oz  ......  Subscription required  ......  Subscription required
Silver oz  ......  Subscription required
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics
Daily milling rate 70,000 t *
Stripping / waste ratio 0.82 *
Daily mining capacity 200,000 t *
Total tonnes mined, LOM 886,080 kt *
Tonnes milled, LOM 486,789 kt *
* According to 2007 study.

Reserves at September 1, 2015:

CategoryTonnage CommodityGradeRecoverable Metal
Proven 481 Mt Copper 0.26 % 2.4 B lbs
Proven 481 Mt Gold 0.46 g/t 5 M oz
Probable 350 Mt Copper 0.18 % 1.2 B lbs
Probable 350 Mt Gold 0.35 g/t 2.7 M oz
Proven & Probable 831 Mt Copper 0.23 % 3.6 B lbs
Proven & Probable 831 Mt Gold 0.41 g/t 7.7 M oz
Measured 547.1 Mt Copper 0.27 %
Measured 547.1 Mt Gold 0.46 g/t
Indicated 463.4 Mt Copper 0.21 %
Indicated 463.4 Mt Gold 0.34 g/t
Measured & Indicated 1,011 Mt Copper 0.24 %
Measured & Indicated 1,011 Mt Gold 0.41 g/t

Commodity Production Costs:

CommodityUnits2020
Credits (by-product) Copper USD -1.32 / lb *
Cash costs Copper USD 1.75 / lb *
Cash costs Copper USD 0.43 / lb *†
Assumed price Copper USD 1.5 / lb *
Assumed price Silver USD 8 / oz *
Assumed price Gold USD 575 / oz *
* According to 2007 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20202017
OP mining costs ($/t mined) CAD 2.27 *
OP mining costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2007 study.
Subscription required - Subscription is required.

2007 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
Total OpEx $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
EBITDA (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 7.5% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of October 15, 2007:
HME TypeModelSizeQuantity
Bulldozer ....................... Subscription required 7
....................... Subscription required ....................... Subscription required 2
....................... Subscription required 4
....................... Subscription required ....................... Subscription required 3
....................... Subscription required ....................... Subscription required 1
....................... Subscription required ....................... Subscription required 5
....................... Subscription required ....................... Subscription required 3
....................... Subscription required ....................... Subscription required 30
....................... Subscription required ....................... Subscription required 2
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2019
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Year-end Mineral Reserves 2015
Feasibility Study Report 2007
Subscription required - Subscription is required.

Aerial view:

Subscription required - Subscription is required.

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