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United States
Silver Bell Mine

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 Location:
55 NW from Tucson, Arizona, United States

  Address:
25000 W. Avra Valley Road
Marana
Arizona, United States
85653
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life18 years (as of Jan 1, 2016)
The mine operates four open pits: North Silver Bell, El Tiro, West Oxide and East Oxide.


Owners

Source: p. 10,55
CompanyInterestOwnership
Grupo Mexico S.A. de C.V. 100 % Indirect
Silver Bell Mining LLC. (operator) 100 % Direct
The Mining Division of Grupo Mexico, S.A. de C.V. (GMéxico) is controlled by Americas Mining Corporation (AMC) which operates the United States subsidiary - Asarco LLC (Asarco).

Asarco LLC includes the Mission, Ray and Silver Bell Arizona mines.

The Silver Bell mine is operated by Silver Bell Mine, LLC ("SBM") of which AR Silver Bell, Inc. ("AR SB") maintains 100% of its capital stock of which ASARCO, LLC maintains 100% of its capital stock.

Contractors

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Deposit Type

  • Porphyry


Summary:

The Silver Bell district in Arizona provides a good example of various electrical and electromagnetic methods applied to the same porphyry copper deposits. Lowest resistivities in the Silver Bell area corresponded with the quartz monzonite porphyry and with zones of sericitic alteration. Likewise, highest IP responses were associated with sericitic alteration. The low resistivities at Silver Bell are caused by the strongly fractured nature of the porphyry system, particularly in sericitic zones, and its interconnected sulfide veinlets. Sericitic zones are highly conductive because of intense fracturing, abundant pyrite mineralization, and sericitic alteration. The higher resistivities of the potassic zone, on the other hand, reflect silicification, disseminated sulfides (as opposed to sulfides deposited in veinlets), and overall less abundant sulfide and clay minerals. Propylitic zones are less fractured and have much lower total sulfides and, thus, higher resistivities. Resistivity weakly correlates with the leached cap and underlying zones of enrichment.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mine operates four open-pits (North Silver Bell, El Tiro, West Oxide and East Oxide).


Crushing and Grinding


Processing

Source: Subscription required

Summary:

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Production:

CommodityUnits2021202020192018201720162015
Copper kt  ......  Subscription required  ......  Subscription required  ......  Subscription required19191919
All production numbers are expressed as cathode.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Daily production capacity  ......  Subscription required  ......  Subscription required63 t of copper cathode63 t of copper cathode63 t of copper cathode63 t of copper cathode
Annual production capacity  ......  Subscription required  ......  Subscription required19.1 kt of copper cathode
Tonnes processed  ......  Subscription required  ......  Subscription required10,255 kt
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Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 64,242 kt Copper 0.303 % 195 kt



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 23, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Information Form 2018
Annual Information Form 2017
Annual Information Form 2016
Annual Report 2016
Annual Report 2015
Other 2015
Annual Report 2014
Fact Sheet 2014
Other 2010
Other 2008
Subscription required - Subscription is required.

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