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United States
Castle Mountain Mine (Castle Mountain Phase 2 Expansion Project)

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 Location:
100 km S from Las Vegas, California, United States

  Regional Office:
980 American Pacific Dr. Suite 102
Henderson
Nevada, United States
89014
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
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  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life19 years (as of Jan 1, 2021)
Castle Mountain Phase 1 Mine achieved commercial production on November 21, 2020.

In 2021 Equinox Gold completed a feasibility study for a proposed Phase 2 expansion that is expected to increase average production to more than 200,000 ounces of gold annually.


Owners

Source: p. 28
CompanyInterestOwnership
Equinox Gold  Corp. 100 % Indirect
Equinox, through its indirect wholly-owned subsidiary NewCastle Gold Ltd, has 100% of the right, title, and beneficial interest in and to Castle Mountain Venture which owns the Castle Mountain Mine.

Contractors

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Deposit Type

  • Epithermal
  • Breccia pipe / Stockwork
  • Volcanic hosted


Summary:

Castle Mountain is classified as a low-sulfidation epithermal gold deposit (Scott et al., 2018), a sub-type of the epithermal class of gold and silver deposits (Sillitoe and Hedenquist, 2003).

Mineralization
Structure and associated rock porosity-permeability characteristics are the first-order control on the distribution of gold. Flow-dome breccia margins, phreatic diatremes, fault cataclasite and fractures focused provided conduits for hydrothermal fluids and contain the highest gold grades. Unfractured coherent flow-dome facies, clay altered volcaniclastic facies, and clay altered phreatomagmatic diatremes with low or variable permeability are weakly mineralized due to lower fluid interaction. Lower permeability units that are mineralized have been cut by structures such faults, fractures, or phreatic diatremes that promoted hydrothermal fluid interactions.

Gold is focused along structures and margins of facies contacts. It is believed that sub-vertical structures acted as pathways for magma and are responsible for the emplacement of the felsic volcanic package. These same structures also acted as conduits for gold-bearing hydrothermal fluids. Intersections of the steep structures with more permeable volcanic rocks created an environment for enhanced gold precipitation from hydrothermal fluids, possibly due to processes of boiling and interaction with meteoric water.

Lithologic controls are dependent on the host rock texture. Tuff be ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Castle Mountain is being developed by Equinox Gold in two stages. Phase 1 construction was completed in 2020 with commercial production achieved in November 2020. Equinox Gold completed a feasibility study for the Phase 2 expansion in March 2021, outlining plans to extend the mine life and expand production to more than 200,000 ounces of gold annually. Phase 2 permitting is expected to commence in Q1 2022.

Mining will be an open pit operation using conventional diesel-powered truck and shovel mining equipment. The current Phase 1 operation consists of a 14,000 ton/d (12,700 t/d) ROM operation with a focus on mining backfilled material that was placed in the JSLA pit from the previous mining operation 20 years ago. The Phase 2 expansion will increase production to 53,500 ton/d and extract hard rock material from open pits which will be drilled, blasted, and loaded to mine trucks using hydraulic shovels and wheel loaders. Phase 2 mine production is split with 50,000 ton/d (45,400 t/d) to the heap leach and 3,500 ton/d (3,200 t/d) to the mill.

There are five pit areas with pits at JSLA (3 phases), Jumbo, Oro Belle, East Ridge (2 phases) and South Domes (2 phases). There is a total of nine phases of open pit mining starting with JSLA backfill and moving north, and then to South Domes to complete the operation. The mining sequence of the phases allows for backfilling of waste as the pit reaches final limits.

Phase 1 mining is being conducted by con ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:
Castle Mountain Phase 1 commenced commercial production on November 21, 2020.

CommodityUnits202220212020Avg. Annual (Projected)LOM (Projected)
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required1732,798
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20212020
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required
Stripping / waste ratio  ......  Subscription required  ......  Subscription required
Daily processing capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2020:
Open pit Mineral Resources are reported using a cut-off grade of 0.17 g/t gold.

Mineral Reserves are reported using a cut-off grade of 0.005 opt (0.17 g/t) gold.

CategoryTonnage CommodityGradeContained Metal
Proven 84,910 kt Gold 0.55 g/t 1,498 koz
Probable 172,990 kt Gold 0.48 g/t 2,670 koz
Proven & Probable 257,900 kt Gold 0.51 g/t 4,168 koz
Measured 781 kt Gold 0.68 g/t 17 koz
Indicated 73,452 kt Gold 0.62 g/t 1,453 koz
Measured & Indicated 74,233 kt Gold 0.62 g/t 1,470 koz
Inferred 69,890 kt Gold 0.63 g/t 1,422 koz

Commodity Production Costs:

CommodityUnits202220212020
Cash costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required
All-in sustaining costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20212020
OP mining costs ($/t mined) USD 3.152.01
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units202220212020
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Proposed Heavy Mobile Equipment as of February 26, 2021:
HME TypeModelSizeQuantityLeased or
Contractor
Backhoe ....................... Subscription required 1.3 cu. yd ....................... Subscription required Leased
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 25, 2022
....................... Subscription required ....................... Subscription required Subscription required May 25, 2022
....................... Subscription required ....................... Subscription required Subscription required May 25, 2022
....................... Subscription required ....................... Subscription required Subscription required May 26, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Fact Sheet 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Pre-Feasibility Study Report 2018
Press Release 2018
Technical Report 2016
Preliminary Economic Assessment 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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