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United States
Jerritt Canyon Mine

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 Location:
65 km N from Elko, Nevada, United States

  Address:
HC31, Box 78
Elko
Nevada, United States
89801
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StatusTemporary Suspension
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Underhand Cut & Fill
  • Longhole stoping
  • Cemented backfill
Production Start...
Mine Life2025
Jerritt Canyon consists of the permitted and operating Jerritt Canyon processing plant and two producing gold mines – SSX-Steer Complex ("SSX") and Smith.

On March 20, 2023, First Majestic Silver Corp. (the "Company" or "First Majestic") announced it is taking action to reduce overall costs by reducing investments, temporarily suspending all mining activities and reducing its workforce at Jerritt Canyon effective immediately.

During the suspension, the Company intends to process approximately 45,000 tonnes of aboveground stockpiles through the plant. Exploration activities are expected to also continue throughout 2023.
Latest NewsFirst Majestic Temporarily Suspends Mining Activities at Jerritt Canyon     March 20, 2023


Owners

Source: p. 69
CompanyInterestOwnership
First Majestic Silver Corp. 100 % Indirect
Jerritt Canyon is owned by Jerritt Canyon Gold LLC ("JCG"), an indirect, wholly-owned subsidiary of the First Majestic Silver Corp.

Contractors

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Deposit Type

  • Carlin-type
  • Carbonate hosted


Summary:

Jerritt Canyon is a Carlin-type gold deposit, hydrothermal in origin and usually structurally controlled.

Jerritt Canyon is hosted by silty carbonate or carbonaceous siliciclastic rocks originally deposited as shelf sedimentary rocks during the Paleozoic age. The Paleozoic host rocks have been imbricated, faulted, and folded through several orogenic events in the Paleozoic and Mesozoic. An early phase of intrusive igneous activity is represented by west-northwest mafic igneous dikes of Paleozoic age.

In general terms, the intersection of structures with favourable host rocks is the primary control and the form of mineralization ranges from apparently stratabound to fault hosted where the faults can be either highly discordant to bedding or bedding-parallel. Deposits at Jerritt Canyon are mostly stratabound or fault hosted. Gold occurs as very fine, micron sized, particles in pyrite and arsenian pyrite. Other sulfides are orpiment, realgar, and stibnite. Alteration includes decarbonatization, decalcification, and silicification (jasperoid).

Gold mineralization at Jerritt Canyon is hosted by Hanson Creek Formation units and the lower part of the Roberts Mountains Formation. The Saval discontinuity, being the contact between the Hanson Creek and the Roberts Mountain Formations, is interpreted as a primary control on gold mineralization at Jerritt Canyon. Gold mineralization is hosted by, or spatially associated, with high angle west-northwest- ........


Mining Methods

  • Underhand Cut & Fill
  • Longhole stoping
  • Cemented backfill


Summary:

Jerritt Canyon has been in operation since 1981, with open pit operations occurring from 1981 to 1999, and underground operations commencing in 1993 at SSX and Smith. SSX and Smith are currently contractor operated.

SSX is accessed via ramp located in the southeast portion of the underground mine at the bottom of a historical open pit, and underground workings strike northwest to southeast, spanning approximately 10,000 ft. SSX is comprised of seven mining zones, with Zone 1 in the east and Zone 7 in the west. The zones overlap in areas due to overlapping orebodies in the vertical plane. SSX is ventilated via a series of raises and through the main ramps. Mineralized material is hauled from muck bays and stockpiled near the portal, where it is then delivered to the mill via larger haul trucks. All mining voids are filled with cemented rock fill (CRF).

Smith is accessed via a ramp located at the bottom of the inactive Dash open pit. Underground workings are extensive and access eight distinct mining zones, though only six zones have been considered by SLR in the estimation of Mineral Reserves. Smith is ventilated via a series of raises and through the main ramp. Similarly to operations at SSX, mineralized material is hauled from muck bays and stockpiled near the portal, where it is then delivered to the mill via larger haul trucks. All mining voids are filled with CRF.

Stoping Methods
Production at SSX and Smith utilizes the cut and fill ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:
Since being acquired on April 30, 2021, the Jerritt Canyon mine has produced 68,567 ounces of gold or 5,013,999 silver equivalent ounces.

CommodityProductUnits20222021202020172016
Gold Metal in doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required129141
Silver Equivalent Metal in doré koz  ......  Subscription required ^  ......  Subscription required
Silver Equivalent Payable metal koz  ......  Subscription required
Gold Equivalent Payable metal oz  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2021201820172016
Tonnes processed  ......  Subscription required1,143,530 tons1,191,674 tons
Daily processing capacity  ......  Subscription required
Daily processing rate  ......  Subscription required2,800 tons3,585 tons3,765 tons
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Reserves at December 31, 2021:
Gold cut-off grades considered to constrain the resources were 2.8 g/t for underground mining and 1.4 g/t for open pit mining.
The cut-off grade used for the Mineral Reserves is 5.01 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 847 kt Gold 5.23 g/t 142.5 koz
Proven 847 kt Silver Equivalent 407 g/t 11,080 koz
Probable 1,682 kt Gold 5.5 g/t 297.4 koz
Probable 1,682 kt Silver Equivalent 428 g/t 23,120 koz
Proven & Probable 2,529 kt Gold 5.41 g/t 439.9 koz
Proven & Probable 2,529 kt Silver Equivalent 421 g/t 34,200 koz
Measured 4,068 kt Gold 5.85 g/t 765 koz
Measured 4,068 kt Silver Equivalent 421 g/t 55,050 koz
Indicated 4,482 kt Gold 5.83 g/t 840 koz
Indicated 4,482 kt Silver Equivalent 419 g/t 60,440 koz
Measured & Indicated 8,550 kt Gold 5.84 g/t 1,604 koz
Measured & Indicated 8,550 kt Silver Equivalent 420 g/t 115,490 koz
Inferred 6,927 kt Gold 5.61 g/t 1,249 koz
Inferred 6,927 kt Silver Equivalent 404 g/t 89,950 koz

Commodity Production Costs:

CommodityUnits20222021
Total cash costs Gold USD  ......  Subscription required&nbs  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required&nbs  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operating Costs:

Units2021
Total operating costs ($/t milled) USD 172.2

Financials:

Units2021
Sustaining costs M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required
Revenue M USD  ......  Subscription required
Operating Income M USD  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2020:
HME TypeSizeQuantityLeased or
Contractor
ANFO Loader ....................... Subscription required Leased
Bolter ....................... Subscription required Leased
Drill (long hole) ....................... Subscription required Leased
Jumbo ....................... Subscription required Leased
Load-Haul-Dump (LHD) 2.5 cu. yd ....................... Subscription required Leased
Load-Haul-Dump (LHD) 6 cu. yd ....................... Subscription required Leased
Scissor Lift ....................... Subscription required Leased
Shotcreter ....................... Subscription required Leased
Truck (underground) 30 t ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 18, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 18, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 18, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Technical Report 2018
Subscription required - Subscription is required.

News:

NewsDate
First Majestic Temporarily Suspends Mining Activities at Jerritt Canyon March 20, 2023
First Majestic Announces Financial Results for Q4 2022, FY2022 & Quarterly Dividend Payment February 23, 2023

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