Peru

Antapaccay Mine

Click for more information

Categories

Overview

Mine TypeOpen Pit
StatusActive
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start... Lock
Mine Life... Lock
SnapshotAs a result of socio-political tensions in early 2023, logistics were constrained and Antapaccay operations were temporarily suspended in Q1 2023. Antapaccay operations returned to normalized levels in March 2023.

Owners

SourceSource
CompanyInterestOwnership
Glencore plc. 100 % Indirect
Compañía Minera Antapaccay S.A. (operator) 100 % Direct
The Antapaccay project is owned and operated by Compañía Minera Antapaccay S.A. (CM Antapaccay), a Peruvian company that is an indirect wholly-owned subsidiary of Glencore.

Contractors

Lock

- subscription is required.

Deposit type

  • Porphyry
  • Skarn

Summary:

The Antapaccay project contains a porphyry-skarn type (copper-silver-gold) deposit located in the Eocene-Oligocene Andahuaylas-Yauri strip, 9.4 kilometres southwest in a straight line from the Tintaya mine, in the area of the old Atalaya mine. The Eocene-Oligocene Andahuaylas-Yauri strip is located 250 to 300 kilometres west of the current Peru-Chile Trench, above a thick cap of sialic crust (50 to 60 kilometres), in a transitory zone between the flat subduction slab of central Peru and the normal subduction of southern Peru and northern Chile and immediately to the southeast of the Abancay deflection. It consists geologically of a thick cretaceous sedimentary sequence folded during the Andean deformations and widely intruded by stocks, sills and dykes of Andahuaylas-Yauri batholith, covered by Cenozoic lacustrine and volcanic deposits and quaternary deposits.

The copper mineralization at Antapaccay is mainly contained in intermediate intrusive rocks with dissemination, veinlets, hydrothermal breccias which are in contact with pre-mineral rocks such as diorites and sedimentary rocks (limestones, calcareous shales, siltstones and sandstones), forming contact mineralized breccias, exoskarn and stockwork in sedimentary bodies with a clear predominance of chalcopyrite over bornite up to 350 metres; the roles reverse at a greater depth and are associated with a level of anhydrite-gypsum.

The dominant mineralization within the porphyry is chalcopyrite, followed by bornite and chalcocite. Mineralization consists of both disseminations and veinlets, with the highest grades of gold corresponding to intense bornite rich stockwork zones. The dominant alteration type within the porphyry is a potassic alteration of the host diorite. The porphyry is also in contact with cretaceous sedimentary rocks, which have formed irregular skarn (limestones) and stockwork (hornfels and quartzites) containing high copper values, but represent a minor component of all the resources.

The conditions for the occurrence of a metasomatic process exist in contact with limestones, generating irregular garnetmagnetite +/-pyroxene exoskarn, mainly with chalcopyrite patches. Extensive areas of intense grey quartz veinlet stockwork with a high bornite and chalcopyrite content were identified always near the hornfels-intrusive rock contact, expanding into the hornfels for several metres.

Coroccohuayco
The Antapaccay property also includes the Coroccohuayco project, a satellite deposit that is located within 10 kilometres of the Antapaccay plant. At this stage, exploration, drilling and engineering studies at Coroccohuayco have focused on defining Mineral Resources and Mineral Reserves and no mining activities are being undertaken.

The main copper bearing minerals at Coroccohuayco are bornite, chalcopyrite and chalcocite, with the host rock consisting of Cretaceous sedimentary rocks of the Ferrobamba and Mara formation intruded by monzonitic plutons of the Eocene— Oligocene Andahuaylas—Yauri batholiths. The Coroccohuayco deposit is dominantly a skarn-hosted deposit, whereas the Antapaccay deposit is dominantly porphyry-hosted.

Reserves

Lock

- subscription is required.

Mining Methods

Lock

- subscription is required.

Comminution

Crushers and Mills

Lock

- subscription is required.

Processing

Lock

- subscription is required.

Production

CommodityUnits202320222021202020192018201720162015
Copper kt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe198205206220202
Gold koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe85132139115122
Silver koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,5761,5231,4551,5361,315
All production numbers are expressed as metal in concentrate.

Operational metrics

Metrics202120202015
Daily processing capacity  ....  Subscribe  ....  Subscribe
Ore tonnes mined  ....  Subscribe  ....  Subscribe32,187 kt
Waste  ....  Subscribe  ....  Subscribe101,120 kt
Tonnes milled  ....  Subscribe  ....  Subscribe32,524 kt

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Lock

- subscription is required.

EV - Electric
AV - Autonomous

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 13, 2024
....................... Subscription required ....................... Subscription required Subscription required May 13, 2024
....................... Subscription required ....................... Subscription required Subscription required May 13, 2024
....................... Subscription required ....................... Subscription required Subscription required May 13, 2024
....................... Subscription required ....................... Subscription required Subscription required May 13, 2024

Aerial view:

Lock

- subscription is required.