Summary

Mine Type	Open Pit
Study Completed	Feasibility
Stage	Permitting
Commodities	Copper Gold Silver
Mining Method	Truck & Shovel / Loader
Mine Life	...
Snapshot	Taseko’s New Prosperity property hosts one of the most significant copper and gold deposits in Canada. The Taseko does not consider the New Prosperity Project to be material at this time. In late 2019, the Tsilhqot’in Nation and Taseko, with support from British Columbia, began confidential talks to resolve their conflict over the proposed New Prosperity mine, recognizing both Taseko’s interests and the Tsilhqot’in Nation’s opposition. The Tsilhqot’in Nation and Taseko have made meaningful progress in dialogue over the New Prosperity project and are nearing a long-term, mutually acceptable resolution that supports reconciliation in Canada. Cautioned that the Prosperity Technical Report has not been updated since 2009 and accordingly, caution needs to be advised when assessing its conclusions.

Deposit type

• Porphyry

Summary:

The project is located within the western-most portion of the Intermontane Belt at the boundary between the Intermontane and Coast morphologic belts. The project hosts a large porphyry gold-copper deposit.

Pyrite and chalcopyrite are the principal sulphide minerals in the deposit. They are uniformly distributed in disseminations, fracture fillings, veins and veinlets. Native gold occurs as inclusions in and along microfractures with copper-bearing minerals and pyrite.

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.

In the western portion of the deposit, the multi-phase Fish Creek Stock has intruded into a thick sequence of andesite flows which overlay volcaniclastic rocks. The steeply south-dipping, oval quartz diorite stock, which is approximately 265 m wide by 800 m long, is surrounded by an east-west trending swarm of subparallel quartz-feldspar porphyritic dikes, which also dip steeply to the south. Together the stock and dikes comprise the Late Cretaceous Fish Lake Intrusive Complex that is spatially and genetically related to the deposit. Post-mineralization porphyritic diorite occurs as narrow dikes that cross-cut all units within the deposit. They represent the final intrusive phase of the emplacement of the Fish Lake Intrusive Complex.

The deposit area is overlain by a variably thick overburden cover consisting of Wisconsinian glacial till, Miocene to Pliocene basalt flows, and Tertiary colluvium and lacustrine sediments.

The deposit is oval in plan and is approximately 1500 m long, 800 m wide and extends to a maximum depth of 880 m. A central potassium silicate alteration zone is co-extensive with the gold-copper mineralization. Along the deposit’s eastern margin, a discontinuous zone of phyllic alteration is developed at the boundary between the potassium silicate alteration zone and the surrounding propylitically altered rocks. The latter extend outward from the deposit for several hundred metres. Late stage sericite-iron carbonate alteration forms irregular zones, particularly within the potassium silicate alteration zone. Argillic alteration is localized along fault zones and overprints earlier alteration assemblages.

Pyrite and chalcopyrite are the principal sulphide minerals in the deposit. They are uniformly distributed as disseminations, fracture-fillings and sub-vertical veinlets and may be accompanied by bornite and lesser molybdenite and tetrahedrite-tenantite. The latter results in somewhat elevated levels of arsenic, antimony, and mercury in some parts of the deposit. Native gold occurs as inclusions in, and along microfractures with, copper-bearing minerals and pyrite. Latestage pyrite-base metal veins, up to several centimetres in width, are most abundant within the upper eastern portion of the deposit.

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.

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

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Comminution

Crushers and Mills

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Processing

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Commodity Production

Operational metrics

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Apr 14, 2025
.......................	.......................		Apr 14, 2025
.......................	.......................		Apr 14, 2025

Employees	Contractors	Total Workforce	Year
......	......	......	2007