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Peru
Ayawilca Project

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 Location:
184 km NNE from Lima, Peru

  Project Contacts:
Av. Benavides 1579 Of. 306, Miraflores
Lima
Peru
EmailEmail
WebsiteWeb
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Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Zinc
  • Tin
  • Lead
  • Silver
Mining Method
  • Cut & Fill
  • Sub-level stoping
  • Dry waste backfill
  • Paste backfill
Mine Life14.4 years (as of Jan 1, 2021)
A Preliminary Economic Assessment dated 14 October 2021 indicates that Ayawilca has the potential to be a Top-10 global zinc producer.
Latest NewsTinka Resources Hits New High-Grade Silver Intercepts at South Ayawilca     May 3, 2023


Owners

Source: p. 29
CompanyInterestOwnership
Tinka Resources Ltd. 100 % Indirect
The Project is held 100% by Tinka, through its wholly-owned subsidiary, Tinka Resources S.A.C.

Contractors

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Deposit Type

  • Manto
  • Carbonate replacement


Summary:

The regional setting, geometry, and zinc mineralogy indicates that the Zinc and Tin Zones of the Ayawilca deposit are CRDs, of which there are several other type examplesin central Peru (e.g., Cerro de Pasco, Morococha, Colquijirca, and San Gregorio). These deposits typically develop when hydrothermal fluids replace carbonate rocks proximal to an intrusive body, although in some cases the causative intrusive body is not observed. CRDs are considered more distal from the source than porphyry and skarn deposits, but closer to the source than intermediate- (or low-) sulphidation epithermal precious metals deposits.

The Ayawilca deposit differs from most other CRDs in central Peru in that there is an early tin–copper mineralization event associated with pyrrhotite. The QPs note that early pyrrhotite tin–copper mineralization is reported at the Cerro de Pasco deposit, although apparently it is not so well developed as at Ayawilca.

The oldest rocks mapped on the Property are phyllite metamorphic rocks which belong to the Devonian Excelsior Group. These outcrop in the north–central and eastern portions of the Project area, and consist of light coloured quartz–sericite–chlorite phyllite and minor graphitic schist. Foliations strike generally northwest–southeast with gentle to moderate dips to the southwest and northeast. The large phyllite outcrop is interpreted to be the core of an anticline (basement high) bounded by two sub-parallel northwest-trending Ande ........


Mining Methods

  • Cut & Fill
  • Sub-level stoping
  • Dry waste backfill
  • Paste backfill


Summary:

The Ayawilca deposit is planned to be mined using underground mining methods. To define the mining method, the University of British Columbia (UBC) mining method selection system was applied, together with consideration of aspects such as safety, the geometry of the resources, the distribution of grades, the scale of production and mining costs. Based on this analyses, two suitable mining methods were selected:
- Overhand cut-and-fill (OCF) with pillars;
- Sub-level stoping (SLS).

The mining strategy involves dividing the deposit into five zones by spatial location and by mining method:
- OCF with pillars: Central and East areas;
- SLS: West, South areas and Silver Zones.
The netsmelter return cut-off was defined at US$65/t, asit covers mining, processing, general and administrative costs and sustaining capital costs, and was determined to be a reasonable balance considering the margin per tonne of material mined while still having a reasonable resource extraction and mine life.

The production rate was set at 8,500 t/d after considering the sustainable rate achievable from the multiple mining areas. Optimizations were completed using the mineable shape optimiser (MSO) unit within Datamine software. The SMU length and height were fixed values, whereas the width varied by zone and mineralized structure, from 5–45 m. Sections of 5 x 5 m were defined for the development drives and the Central area pillars.

A m ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Zinc Concentrate kt 3094,450
Zinc Payable metal M lbs 4,112
Zinc Metal in concentrate M lbs 4,905
Lead Payable metal k lbs  ......  Subscription required
Lead Metal in concentrate k lbs  ......  Subscription required
Silver Payable metal koz  ......  Subscription required
Silver Metal in lead concentrate koz  ......  Subscription required  ......  Subscription required
Zinc Equivalent Payable metal k lbs  ......  Subscription required
Lead-Silver Concentrate kt  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily ore mining rate  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Mining scale, tpd  ......  Subscription required
Processing scale, tpd  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at August 30, 2021:
Mineral Resources are reported above a cut-off NSR value of US$55/t.

CategoryTonnage CommodityGradeContained Metal
Indicated 19 Mt Zinc 7.15 % 2,990 M lbs
Indicated 19 Mt Lead 0.21 % 87 M lbs
Indicated 19 Mt Silver 16.8 g/t 10.3 M oz
Inferred 47.9 Mt Zinc 5.36 % 5,657 M lbs
Inferred 47.9 Mt Lead 0.35 % 370 M lbs
Inferred 47.9 Mt Silver 20 g/t 30.7 M oz

Commodity Production Costs:

CommodityUnitsAverage
Credits (by-product) Zinc USD  ......  Subscription required&nbs
Cash costs (sold) Zinc USD  ......  Subscription required&nbs
Cash costs (sold) Zinc USD  ......  Subscription required *†
All-in sustaining costs (sold) Zinc USD  ......  Subscription required *†
Assumed price Lead USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2021
UG mining costs ($/t milled) USD 32.8 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $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 309
G&A costs $M USD 186
Total OpEx $M USD  ......  Subscription required
Mining Taxes $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Net Operating Income (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 @ 8% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 8% $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
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Proposed Heavy Mobile Equipment as of October 14, 2021:
HME TypeModelQuantity
ANFO Loader ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 14, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 14, 2021
....................... Subscription required ....................... Subscription required Subscription required Nov 26, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2019
Subscription required - Subscription is required.

News:

NewsDate
Tinka Resources Hits New High-Grade Silver Intercepts at South Ayawilca May 3, 2023

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