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Brazil
Xavantina (NX Gold) Mine

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 Location:
15 km NW from Nova Xavantina, Brazil
  Address:
Estrada do Garimpo do Araés, Km 18, s/n - Zona Rural
Nova Xavantina
Brazil
78690-000
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Underhand Cut & Fill
  • Room-and-pillar
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life2026
Latest NewsEro Copper Files Technical Report for the Xavantina Operations     May 12, 2023

Owners

Source: p. 10
CompanyInterestOwnership
Ero Copper Corp. 97.6 % Indirect
NX Gold S.A. (operator) 100 % Direct
Ownership Tree
Ero Copper Corp. indirectly holds approximately 97.6% of the voting shares of NX Gold S.A. (“NX” or “NX Gold”) through its wholly-owned subsidiary, Ero Gold Corp. (“Ero Gold”), incorporated under the BCABC. NX Gold holds a 100% interest in the NX Gold Mine.

Contractors

Subscription required - Subscription is required.

Deposit Type

  • Vein / narrow vein
  • Metamorphic hosted

Summary:

The rock units present within the NX Gold Mine belong to the Nova Xavantina Volcano-Sedimentary Sequence, part of the upper regional Cuiabá Group.

Historic and the current known extent of gold mineralization at the NX Gold mine are
structurally controlled and hosted in four major sulphide-rich quartz veins/bodies, from west to east: Buracão, Santo Antonio, Brás and Matinha. The veins are hosted in strongly deformed metamorphosed sedimentary rock units and diorite that trend generally to the northeast. The veins exhibit a typical laminated pattern parallel with the vein contacts. The laminations are
characterized by alternating quartz bands and foliated host rocks indicative of multiple pulses of mineralized fluids during formation.

There are two main phases of folding recognized at the NX Gold Mine.

The first phase of folding is associated with a variably oriented, shallowly to moderately dipping schistosity (S1). The S1 schistosity is deformed by a crenulation cleavage (S2) oriented generally 234/66 but varying in strike from 190 to 270 degrees with westerly to northerly dips varying between 30 and 80 degrees. Both foliations (schistosity and cleavage) are present at the mine and at least as far as the Cristal vein located 1,800 metres to the northeast of the mine.

The development of the S2 cleavage is heterogeneous and is generally better developed near the mine to a point where the S1 is completely re-oriented along th ........

Mining Methods

  • Underhand Cut & Fill
  • Room-and-pillar
  • Cemented backfill
  • Paste backfill

Summary:

Ore is currently produced from the Santo Antonio vein– an east-west striking, shear-zone hosted, quartz vein, accessed from a single mine portal and decline and from the Buracão vein.

Economic gold and silver mineralization at the NX Gold Mine is structurally controlled within the Araés shear zone. Gold and silver are currently mined from a major sulphide-rich, laminated quartz vein dipping approximately 40 degrees to the north-northwest and striking to the west-southwest – the Santo Antonio vein, which achieved first production during the fourth quarter of 2019. Prior to the second half of 2019, mining activities occurred in the Brás and Buracão veins, located to the east and west of Santo Antonio, respectively.

The current development of the underground mine is at level -220 in the Santo Antonio vein.

Incorporating geotechnical design parameters, the Santo Antonio vein was sub-divided into two main panels on level -65 (upper) and level -170 (lower) corresponding to the delineation between rock mass quality of the vein. The upper level is, in general, of lower rock quality, thus underhand cut and fill has been selected as the mining method of choice, incorporating the use of cemented paste backfill. The lower panel, which exhibits better rock quality and strength characteristic, will continue to employ the use of inclined room and pillar, with full recovery of the pillars expected utilizing cemented paste in an ascending operation.

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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^ Guidance / Forecast.

Production:

CommodityUnits202220212020201920182017
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required39,80825,287
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required158,275 t117,857 t135,013 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required154,271 t119,469 t134,163 t
Annual milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Reserves at September 30, 2021:
Mineral Resources were estimated using a cut-off grade of 1.90 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Probable 1,104 kt Gold 8.64 g/t 306.8 koz
Indicated 1,081 kt Gold 10.28 g/t 357.3 koz
Inferred 714 kt Gold 6.61 g/t 151.9 koz

Commodity Production Costs:

CommodityUnits202220212020201920182017
Credits (by-product) Gold USD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†
C1 cash costs Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 520 / oz†   790 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 48.4   32.8  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 16.1   5.1  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 10.1   0  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 6   -0.8  
Subscription required - Subscription is required

Heavy Mobile Equipment:
HME TypeModelQuantityRef. Date
Backhoe ....................... Subscription required ....................... Subscription required Sep 30, 2020
Backhoe ....................... Subscription required ....................... Subscription required Sep 30, 2020
Drill jumbo (single boom) ....................... Subscription required ....................... Subscription required Sep 30, 2020
Drill jumbo (two boom) ....................... Subscription required ....................... Subscription required Sep 30, 2020
Grader ....................... Subscription required ....................... Subscription required Sep 30, 2020
Loader ....................... Subscription required ....................... Subscription required Aug 31, 2018
Loader ....................... Subscription required ....................... Subscription required Sep 30, 2020
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Sep 30, 2020
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 29, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required 2019
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Information Form 2022
Annual Report 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Financial Review 2018
Management Discussion & Analysis 2018
Technical Report 2018
Subscription required - Subscription is required.

News:

NewsDate
Ero Copper Files Technical Report for the Xavantina Operations May 12, 2023

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