Chile

Spence Mine

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Categories

Overview

Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start... Lock
Mine Life2062
ShapshotPampa Norte Operation consists of two assets in the Atacama Desert in northern Chile – Spence and Cerro Colorado.

Spence produces copper cathodes and copper concentrate, with byproducts including gold, silver and molybdenum.
Related AssetPampa Norte Operation

Owners

SourceSource
CompanyInterestOwnershipInvestor's Info
BHP Group Ltd. 100 % Indirect
Minera Spence S.A. (operator) 100 % Direct
BHP owns 100% of Spence mine. The operator of Spence is BHP.

Contractors

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Deposit type

  • Porphyry

Summary:

The Spence porphyry copper deposit is related to three stocks of dacitic porphyries and tourmaline-bearing hydrothermal breccias, which were emplaced in andesitic volcanic rocks of the Upper Cretaceous–Lower Tertiary. Laser 40Ar/39Ar plateau ages in magmatic biotites of pre- and post-mineralization dacitic stocks show evidence that hypogene mineralization (chalcopyrite, pyrite, molybdenite, and lesser amounts of bornite and tennantite) occurred between 56 and 57 Ma. Unconsolidated gravel deposits and a leach cap cover an oxidation blanket characterized by atacamite, chrysocolla, and minor brochantite, in which the Cu-hydroxychloride is by far the dominating mineral. Underlying the oxide zone is a well-developed chalcocite- and lesser covellite-bearing supergene enrichment blanket. Spence is enriched and oxidised porphyry copper deposit containing in situ copper oxide mineralisation that overlies a near-horizontal sequence of supergene sulphides, transitional sulphides, and finally primary (hypogene) sulphide mineralisation. Representative samples from pit walls and drill cores were selected in order to cover most of the hypogene and supergene zones, including chalcopyrite from the hypogene-enriched sulfides and hypogene zones, chalcocite from the supergene-enriched sulfides and hypogene-enriched blankets, chrysocolla from the oxide blankets, and atacamite from the oxide zone within the host rocks and gravels and leach cap.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Production

CommodityProductUnits2024202320222021202020192018
Copper Total kt 000000
Copper Cathode kt 000000000000000200
Copper Metal in concentrate kt 00000000
Molybdenum Metal in concentrate M lbs 0000000
Gold Metal in concentrate oz 00000000000000
Silver Metal in concentrate koz 00000000000
^ Guidance / Forecast.

Operational metrics

Metrics202320222021202020192018
Annual production capacity 000000000000000200 kt of copper cathode
Total tonnes mined 0000000000000000000000000089,976 kt
Tonnes milled 000000000000000000000000019,447 kt

Production Costs

Commodity production costs have not been reported.

Financials

Units20232022
Revenue M USD  ....  Subscribe  ....  Subscribe
EBITDA M USD  ....  Subscribe  ....  Subscribe

Heavy Mobile Equipment

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AV - Autonomous

Personnel

Mine Management

Source Source
Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2023
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Aerial view:

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