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Brazil
Deepening Inferred (Extension) Project

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 Location:
87 km SE from Petrolina, Brazil

  Project Contacts:
Fazenda Caraíba, s/n, distrito de Pilar
Jaguarari
Brazil
489670-000
Phone  ...  Subscription required
Fax+55-74-3532-8763
WebsiteWeb
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Overview

StageConstruction
Mine TypeUnderground
Commodities
  • Copper
Mining Method
  • Longitudinal open stoping
  • Blast Hole Stoping
  • Transverse open stoping
  • Cemented backfill
Production Start...
Mine Life13 years (as of Jan 1, 2022)
The Caraíba Operations plans to create a two-mine system at the Pilar Mine (known as Pilar 3.0) whereby the upper levels of the mine, currently in operation, will be serviced by the existing shaft, while the Deepening Extension Zone will utilize a new, larger external shaft, expected to result in significant growth in total ore production from the mine, ramping from current levels of approximately 1.3 million tonnes per annum to approximately 3.0 million tonnes by 2026.
Latest NewsUMS bridges the gap between the front-end and construction     July 28, 2023


Owners

Source: p. 11,23
CompanyInterestOwnership
Ero Copper Corp. 99.6 % Indirect
Mineração Caraíba S.A. (operator) 100 % Direct
Ero Copper Corp. has 99.6% interest in Mineração Caraíba S.A.

MCSA holds a 100% interest in each of the Caraíba Operations.

Contractors

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Deposit Type

  • Magmatic


Summary:

The Pilar Mine is located in the southern part of the MCSA Mining Complex within the Curaçá Valley. The geology of the mine consists of a high-grade metamorphic terrain, composed of gneiss and migmatite of the Caraíba Complex that were intruded by mafic, ultramafic and late granitic rocks. The mafic and ultramafic intrusions are mainly composed of pyroxenite, norite, and gabbro. The melanorite is a term used for logging purpose to describe a host rock, either a gneiss, a gabbro or a norite, that is intruded by several mafic-ultramafic dykes that are too small individually to be logged separately. The gneissic country rocks have gone through 3 phases of deformation and show fold-interference patterns. The ultramafic units as well as the late granitic and pegmatite intrusions were emplaced after the 3 phases of deformation in the gneiss and generally dip steeply to the west and strike northerly. Recent underground mapping indicates that some of the pegmatite dykes were emplaced along faults (MCSA, 2020). The NWstriking diabase dykes and quartz veins crosscut the metamorphic and intrusive units. A series of shear zones, oriented NNE and NNW with moderate westerly dip, represent a late deformation event but their relative displacement is not well documented (D’El Rey Silva, 1984, Frugis, 2017). Finally, a series of late faults, oriented NE to ENE and NW, are also reported by D’El Rey Silva (1984) but with unclear sense and amount of displacement. The gneiss and migmatites, tog ........


Mining Methods

  • Longitudinal open stoping
  • Blast Hole Stoping
  • Transverse open stoping
  • Cemented backfill


Summary:

For production within the Deepening Project, considering the geological and geotechnical characteristics of the orebody, the selected mining method is open blast hole stoping, with delayed paste-fill. This mining method is applied either transverse or longitudinal to the orebody, based on the width of the mining zone, and is currently in use at the mine. The mine design has incorporated geotechnical recommendations to define production stopes, access to the production stopes as well as associated infrastructure and support requirements.

Access to the Deepening Project will be conducted through the new vertical production shaft. This shaft is required for Ero Brasil to meet future underground production demands and ensure the mine remains fully ventilated and serviced as part of the Company’s Pilar 3.0 initiative. The personnel will be lowered to a single loading and unloading level which is -1158m below collar. The shaft will be sunk using mechanised drill and blast techniques and equipment. There will be four access points on the vertical shaft, which will be accessed from the existing internal ramp system for purposes of raise boring.

A vertical shaft has been designed a 6.3 m (final lined dimension size) diameter shaft and a 6.9 m (excavation size) diameter shaft that will extend from surface to the loading station at shaft bottom, which is at a depth of 1552.75 m below top of collar (-1075 level).

The underground ore and waste handling ar ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Combined production numbers are reported under

Operational Metrics:

Metrics
Annual mining capacity  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at September 30, 2022:
Mineral reserves are based on a long-term copper price of US$3.30 per lb, and a USD:BRL foreign exchange rate of 5.29.

CategoryTonnage CommodityGradeContained Metal
Proven 774 kt Copper 1.16 % 9 kt
Probable 10,201 kt Copper 1.76 % 179.1 kt
Proven & Probable 10,975 kt Copper 1.71 % 188.1 kt



Proposed Heavy Mobile Equipment as of December 22, 2022:
HME TypeSizeQuantity
Jumbo ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 18, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Information Form 2022
Annual Report 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

News:

NewsDate
UMS bridges the gap between the front-end and construction July 28, 2023

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