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Brazil
Santa Luz Project

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 Location:
28 km N from Santaluz, Brazil

  Project Contacts:
Faz. Fazenda M
Santaluz
Brazil
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageConstruction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
  • Agitated tank (VAT) leaching
  • Resin in leach (RIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life11 years (as of Jan 1, 2020)
August 11, 2020 - Finalizing update of costs and engineering for the retrofit and refurbishment of existing infrastructure before a full construction decision in H2 2020; early works activities commenced in Q3 2020.
Latest NewsEquinox Gold Announces Filing of Santa Luz Technical Report     November 30, 2020


Owners

Source:
CompanyInterestOwnership
Equinox Gold  Corp. 100 % Indirect
On May 24, 2018, Leagold Mining completed the acquisition of Brio Gold Inc.

Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Orogenic


Summary:

Mineralization at the Santa Luz Project is consistent with an orogenic gold deposit type.

At the Project, gold mineralization is mainly related to quartz-carbonate-sulphide veining and breccia filling hosted in sheared and hydrothermally altered rocks. Breccia may be comprised dominantly of carbonaceous sedimentary, dacitic, or other volcanic rocks, depending on local geology.

Gold mineralization is associated with two main types of quartz veins. The most common type is foliation-parallel, white to grey coloured, strike north-south, and generally less than one metre wide veins. They may be deformed and boudinaged or may appear undeformed. Where deformed, they are associated with stretch lineations related to transcurrent or thrust movements. The second type of commonly observed quartz veins are most likely related to late northeast-striking structures. These structures are in predominantly brittle or ductilebrittle faults that crosscut all other structures, including foliation, and display a general dextral sense of movement. The veins associated with these structures are normally black or dark grey and are thicker than the north-south striking veins. Fluid assisted hydraulic breccia is commonly associated with these veins.

Mixed veins, characterized by black and milky-coloured quartz, are found in strongly broken zones, mainly at the intersections of the north-south structures with the northeast-southwest structures. These intersections host voluminous and high-grade gold quartz veins and silicified breccia.

The host rocks of the gold mineralization exhibit weak to moderately strong alteration. The most common observed hydrothermal alteration features are albitization, carbonatization, sulphidation, sericitization, and silicification. Host rocks are locally entirely replaced by albite, quartz, sericite and carbonate minerals. Mineralized zones range in thickness from a few metres to tens of metres and have relatively long strike and dip lengths. Geologic models show mineralization at C1 has a north-south strike length of approximately 1,550 m, width of roughly 1,400 m orthogonal to strike, and a depth extension of 840 m. Mineralization ranges in thickness from 15 to 55 m with good continuity along strike and down dip. Dacitic mineralization accounts for approximately 45% of the deposit, with carbonaceous mineralization accounting for 55% of the deposit.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Santa Luz will be a conventional truck and shovel open pit mining operation. The ore and waste rock will be drilled and blasted, loaded onto trucks, and hauled to the crusher area, stockpile areas, or waste rock piles. Ancillary activities will include, but not be limited to, road maintenance, road dust control, site dewatering, dump and stockpile maintenance, grade control, and tailings facility heavy equipment support (as needed).


Crushing and Grinding


Processing

  • Flotation
  • Agitated tank (VAT) leaching
  • Resin in leach (RIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The original processing plant at Santa Luz was built and placed in operation in mid-2013 and was shut down in September 2014 after 14 months of operation. The original plant consisted of a comminution circuit followed by flotation and CIL of the flotation concentrate with kerosene blanking of the organic carbon. The plant did not operate well, as a result of both process difficulties and mechanical problems. The new processing facility will incorporate the crushing, crushed ore storage, and SAG mill sections of the original plant. The rest of the plant, with the exception of the refinery, will be new.

The plant will consist of the following sequence of processes:
• Two-stage crushing
• Two-stage grinding
• Pre-aeration and kerosene conditioning
• RIL leaching
• Detoxification of leached tailings
• Containment of tailings in a TSF
• Loaded-resin washing and elution
• Electrowinning of gold from the eluate
• Refining to generate g ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Gold Recovery Rate, %  ......  Subscription required
Gold Head Grade, g/t 1.39
Subscription required - Subscription is required.

Projected Production:

CommodityUnits2019
Gold oz  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Plant annual capacity  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
* According to 2018 study.
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Total 25,000 kt Gold 1.43 g/t 1,153 koz
Probable Total 3,200 kt Gold 1.03 g/t 106 koz
Proven & Probable Total 28,200 kt Gold 1.39 g/t 1,259 koz
Measured Total 31,200 kt Gold 1.36 g/t 1,364 koz
Indicated Total 9,700 kt Gold 1.96 g/t 612 koz
Measured & Indicated Total 40,900 kt Gold 1.5 g/t 1,976 koz
Inferred Total 7,700 kt Gold 2.02 g/t 501 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD  ......  Subscription required *
Total cash costs Gold USD  ......  Subscription required *
All-in sustaining costs (AISC) Gold USD  ......  Subscription required *
Assumed price Gold USD  ......  Subscription required *
* According to 2018 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2018
OP mining costs ($/t mined) USD 2.18 *
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2018 study.
Subscription required - Subscription is required.

2018 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 382.1
G&A costs $M USD 77.9
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Operating margin (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 7.5% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 7.5% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of October 22, 2018:
HME TypeModelSize
Bulldozer ....................... 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 TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 23, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Pre-Feasibility Study Report 2016
Year-end Mineral Reserves 2016
Subscription required - Subscription is required.

News:

NewsDate
Equinox Gold Announces Filing of Santa Luz Technical Report November 30, 2020
Equinox Gold Commences Full Construction of Santa Luz Project November 9, 2020
Leagold Mining Announces Positive Updated Feasibility Study for its Santa Luz Project October 25, 2018
Brio Gold Announces PEA Results for C1 Underground Mineral Resource at Santa Luz Project December 7, 2017

Aerial view:

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