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United States
Mission Mine

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 Location:
22 km S from Tucson, Arizona, United States

  Address:
4201 West Pima Mine Road
Sahuarita
Arizona, United States
85629
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WebsiteWeb
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  • Geology
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  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2038
The Mission Complex, an open-pit mine composed of the Mission, Eisenhower, Pima, Mineral Hill and South San Xavier properties and the nearby North San Xavier mine. Additionally, there are two concentrators: Mission Molienda Norte and Molienda Sur.


Owners

Source: p. 11,54
CompanyInterestOwnership
Grupo Mexico, S.A.B. de C.V. 100 % Indirect
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.

Contractors

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Deposit Type

  • Porphyry
  • Skarn


Summary:

The Mission deposit is a porphyry copper skarn deposit located southwest of the city of Tucson in Pima County, Arizona. A series of Paleozoic sedimentary rocks. Mineralization is a skarn-related copper porphyry deposit with seams and disseminations of copper carbonates and sulfides with minor zinc, lead and molybdenum minerals in a pyrometasomatic deposit in altered, complexly folded, and faulted Paleozoic limestone and Triassic sedimentary and volcanic formations intruded by Laramide and Tertiary intrusives. There is a thin secondary enrichment zone. The host rock unit is the Scherrer Formation. A series of Paleozoic sedimentary rocks, dominated by carbonate, are folded, faulted, and fully inverted. These rocks have an overlying unconformable thick section of fine-grained Mesozoic clastic rock. A tabular body of laramide quartz monzonite porphyry invades the sedimentary sequence. Intrusion-related hydrothermal fluids alter and mineralize the host rock as well as the quartz monzonite porphyry. The result is a series of interbedded skarns and altered siliceous rocks with variable alteration and sulfide mineralogy, which are controlled by the original rock lithology. About 26 million years ago, the deposit moved laterally about 10.5 kilometers from the Twin Buttes area to its present location on a larger low-angle structure. As a consequence, the deposit partially eroded, failed, and was covered with 61 meters of alluvial soil.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Mission Complex, an open-pit mine composed of the Mission, Eisenhower, Pima, Mineral Hill and South San Xavier properties and the nearby North San Xavier mine.

The Mission Complex currently consists of an open pit copper and molybdenum mine that involves drilling, blasting, loading and haulage activities to both waste rock and crushers. The waste rock is not processed further.

The Mission mine is approximately 3.2 km wide, 4 km long and 427 m deep.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required446268
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required179204271
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Operational Metrics:

Metrics202220212020201920182017
Daily milling capacity  ......  Subscription required  ......  Subscription required47.4 kt46.3 kt46.3 kt53.3 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required1.57 1.83 2.22 2.01
Ore tonnes mined  ......  Subscription required  ......  Subscription required16,549 kt15,099 kt16,902 kt17,385 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required42,589 kt42,736 kt54,445 kt52,292 kt
Tonnes milled  ......  Subscription required  ......  Subscription required16,549 kt15,099 kt16,902 kt17,385 kt
Daily mining rate  ......  Subscription required  ......  Subscription required144,000 t144,000 t144,000 t144,000 t
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Reserves at December 31, 2022:
Cut-off grade 0.190% Cu

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 204,157 kt Copper 0.406 % 829 kt


Water Supply
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Heavy Mobile Equipment as of December 31, 2022:
HME TypeSize
Truck (haul) 290 t

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 28, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 20, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 20, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 20, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2022
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
Annual Information Form 2022
Other 2022
................................... Subscription required 2021
................................... 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 Information Form 2015
Annual Report 2015
Fact Sheet 2015
Annual Information Form 2014
Annual Report 2014
Fact Sheet 2014
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