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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
The Jerritt Canyon consists of the permitted Jerritt Canyon processing plant and four producing gold mines, including the Smith mine, the SSX mine, the Saval II mine and the West Generator mine.

The First Majestic announced the temporary suspension of mining activities at Jerritt Canyon on March 20, 2023 due to ongoing challenges such as contractor inefficiencies, high costs, inflationary cost pressures, lower than expected head grades and multiple extreme weather events that limited plant throughput.

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.

Owners

Source: p. 80
CompanyInterestOwnership
First Majestic Silver Corp. 100 % Indirect
Jerritt Canyon is owned by Jerritt Canyon Gold LLC, 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
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Processing

Flow Sheet: Subscription required

Summary:

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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.

CommodityProductUnits20232022202120202017
Gold Metal in doré oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required129,335
Silver Equivalent Metal in doré oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required
Silver Equivalent Payable metal oz  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
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Operational Metrics:

Metrics2022202120182017
Daily processing capacity  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required1,143,530 tons
Daily processing rate  ......  Subscription required  ......  Subscription required2,800 tons3,585 tons
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Reserves at December 31, 2022:
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.

CategoryTonnage CommodityGradeContained Metal
Measured 4,988 kt Gold 5.61 g/t 900 koz
Measured 4,988 kt Silver Equivalent 463 g/t 74,330 koz
Indicated 4,351 kt Gold 5.51 g/t 771 koz
Indicated 4,351 kt Silver Equivalent 455 g/t 63,710 koz
Measured & Indicated 9,339 kt Gold 5.57 g/t 1,671 koz
Measured & Indicated 9,339 kt Silver Equivalent 460 g/t 138,040 koz
Inferred 9,547 kt Gold 5.07 g/t 1,557 koz
Inferred 9,547 kt Silver Equivalent 419 g/t 128,640 koz

Commodity Production Costs:

CommodityUnits202320222021
Total cash costs Gold Equivalent USD  ......  Subscription required
Total cash costs Silver Equivalent USD  ......  Subscription required  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold Equivalent USD  ......  Subscription required
All-in sustaining costs (AISC) Silver Equivalent USD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
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Operating Costs:

Units20222021
Total operating costs ($/t milled) USD 205.87  172.2  

Financials:

Units20222021
Sustaining costs M USD  ......  Subscription required  ......  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

Water Supply
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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 Jul 21, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2020
....................... Subscription required ....................... Subscription required Subscription required Jul 20, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 21, 2023
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Press Release 2023
Annual Report 2022
Corporate Presentation 2022
Form 40-F 2022
Management Discussion & Analysis 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Technical Report 2018
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