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Peru
Shalipayco Project

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 Location:
173 km NE from Lima, Peru

  Project Contacts:
Av. Circunvalación del Golf los Incas 170 Santiago de Surco
Lima
Peru
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  • Overview
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Overview

StatusInactive / Suspended
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Bench & Fill
  • Room-and-pillar
Mine Life15 years (as of Jan 1, 2017)
February 15, 2023 - After a careful assessment and prioritization of Nexa Resources S.A. portfolio optimization, it has decided to not move forward with two of its potential greenfield projects, Shalipayco and Pukaqaqa located in Peru.


Owners

Source: p. 9,61
CompanyInterestOwnership
Pan American Silver Corp. 25 % Indirect
Nexa Resources S.A. 62.61 % Indirect
The Shalipayco Project is a joint venture between Nexa Peru (Nexa Peru – a Peruvian company that is 83.554% directly and indirectly owned by Nexa Resources S.A.), which holds a 75.0% interest and Pan American Silver Perú S.A.C.(a wholly-owned subsidiary of Pan American Silver Corp.), which holds the remaining 25.0%. Compania Minera Shalipayco S.A.C. holds 100.0% of the mineral interests in the Shalipayco Project, with the exception of one mineral concession held directly by Nexa Resources S.A.

Nexa Resources S.A. owns a total of 62.61% in the Project.

Contractors

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Deposit Type

  • Mississippi Valley Type
  • Manto
  • Vein / narrow vein


Summary:

The Shalipayco deposit is interpreted to be a Mississippi Valley-type (MVT) deposit. The following is taken from Leach et al. (1995).

The mineralization at Shalipayco consists of stratabound mantos and lenses subparallel to the stratigraphy. Vein mineralization (Veta Eddy) has also been identified at the Project site, however, it is not considered part of the resources because of insufficient drill hole information and lack of structural interpretation.

The main mantos are the Resurgidora, Intermedio, San Luis, Pucará, and Virgencita mantos. The mantos do not generally display extensive lateral continuity. Length varies between 50 m and 400 m and thickness averages 1.50 m. However, the Intermedio and Resurgidora Mantos can reach up to 3.0 km and 4.0 km in length, respectively, and a thickness of up to 18 m.

Mineralization in the Project consists of sphalerite, galena, and pyrite, with a gangue of marcasite, bravoíte, barite, dolomite, calcite, quartz, and dolo-sparite. Mineralization occurs with varying textures like rhythmites, replacements, collapse breccias, crackle breccias, mosaic breccias, veinlets, and evaporitic textures among others. The zinc and lead content may vary up to 51% Zn (Intermedio Manto) and 17% Pb (Intermedio Manto). The average grades for mineralization are 4.9% Zn and 0.5% Pb, respectively. The Zn/Pb ratio varies from 73.2 in the Resurgidora to 304.6 in the Intermedio Manto.

INTERMEDIO AND RESURGIDORA MANTOS< ........


Mining Methods

  • Bench & Fill
  • Room-and-pillar


Summary:

The production plan envisages mining with a variety of underground mining methods dependent on the vein characteristics. The mine design is based on the use of a combination of Room and Pillar and Bench and Fill methods. Stoping development will be predominantly carried out within the mineralization. The particular variant of the mining method applied depends largely on the vein thickness and continuity of the mineralization. Three different variations of the method are envisaged for veins with the following average widths: 3.2 m, 6.8 m, and 14.3 m.

The mine was geologically broken into four separate areas, Zones One, Two, Three, and Four. The four zones will have independent ramp systems, which will ensure that steady state production can be achieved. Mineralized material from all four zones will be trucked into a central primary crushing station.

Three separate portals will be constructed to access the deposit. The portals are located at Level 4,220 m, 4,290 m, and 4,340 m. A principal level driven at elevation 4,270 m will connect all three portals, as well as all four mineral zones.

The mine was assumed to be operating on a 360 days per year rotation, with two 12-hour shifts per day. The effective operating hours per day were calculated to be 12.75 hours per day. The mine plan was envisaged with a 3,000 tpd or 1,080 ktpa production scenario.

The mining operation will be carried out by a contractor, who will be supervised by th ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityProductUnitsLOM
Zinc Payable metal M lbs 1,193
Zinc Concentrate kt 1,276
Lead Payable metal M lbs  ......  Subscription required
Lead Concentrate kt  ......  Subscription required
Silver Payable metal oz  ......  Subscription required

Operational Metrics:

Metrics
Daily ore mining rate 3,000 t *
Annual ore mining rate 1,080 kt *
Ore tonnes mined, LOM 14,272 kt *
Tonnes processed, LOM 14,272 kt *
* According to 2017 study.

Reserves at June 30, 2017:
Mineral Resources are estimated at an NSR cut-off value of US$45.

CategoryTonnage CommodityGradeContained Metal
Measured 2.45 Mt Zinc 5.41 % 132 kt
Measured 2.45 Mt Lead 0.42 % 10 kt
Measured 2.45 Mt Silver 32.8 g/t 2.6 M oz
Indicated 3.84 Mt Zinc 5.74 % 220 kt
Indicated 3.84 Mt Lead 0.44 % 17 kt
Indicated 3.84 Mt Silver 42.1 g/t 5.2 M oz
Measured & Indicated 6.29 Mt Zinc 5.61 % 353 kt
Measured & Indicated 6.29 Mt Lead 0.43 % 27 kt
Measured & Indicated 6.29 Mt Silver 38.5 g/t 7.8 M oz
Inferred 16.93 Mt Zinc 4.95 % 838 kt
Inferred 16.93 Mt Lead 0.47 % 80 kt
Inferred 16.93 Mt Silver 34.7 g/t 18.9 M oz

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Lead USD 0.88 / lb *  
Assumed price Zinc USD 1.06 / lb *  
Assumed price Silver USD 18.9 / oz *  
* According to 2017 study / presentation.

Operating Costs:

Units2017
UG mining costs ($/t milled) USD 24.9 *  
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2017 study.
Subscription required - Subscription is required.

2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 185.5
Transportation (haulage) costs $M USD 108.6
G&A costs $M USD 53.5
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (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 @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 9% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 9% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Pipelines and Water Supply
Source: Subscription required

- subscription is required.


Proposed Heavy Mobile Equipment as of July 26, 2017:
HME TypeModelSizeQuantityLeased or
Contractor
Cable bolter ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2017
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 15, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Annual Review 2022
Form 20-F 2022
................................... Subscription required 2021
................................... Subscription required 2020
Preliminary Economic Assessment 2017
Corporate Presentation 2015
Financial Review 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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