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Peru
Crespo Project

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 Location:
103 km W from Espinar, Peru

  Project Contacts:
Calle La Colonia No. 180 Urb. El Vivero Santiago de Surco
Lima
Peru
Phone  ...  Subscription required
Fax+511-437-5009
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  • Overview
  • Owners
  • Geology
  • Mining
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  • Reserves
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  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Silver
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life9 years (as of Jan 1, 2016)


Owners

Source:
CompanyInterestOwnership
Hochschild Mining Plc. 100 % Indirect

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Breccia pipe / Stockwork
  • Epithermal


Summary:

Within the Liam Regional Venture Area, the oldest volcanic units are those of the Tacaza Formation which in turn are overlain by the Late Miocene Alpabamba volcanics consisting of bedded, felsic to andesitic tuffs and lavas and associated re-worked units. It is the Alpabamba units which host the Cerro Crespo-Queshca gold-silver mineralization.

Cerro Crespo butte is a high-level, complex, hydrothermal vent system located on the southern side of the maar-like crater and exhibiting several felsic diatreme/brecciation events. At a depth of 150 to 200 m some of these diatreme/breccia zones become narrow, fault-controlled feeder zones.

MINERALIZATION
The Soteco Joint Venture initially identified the Liam area as a zone of high sulphidation type epithermal gold-silver mineralization and in particular that the Cerro Crespo butte could represent a vent related diatreme-type body.

Subsequently Misosa ( Minera del Suroeste S.A.C.) mapped and sampled in detail Cerro Crespo and Queshca and then carried out an initial diamond drilling program at Cerro Crespo. Detailed mapping and sampling in 2002 and 2003 resulted in the collection of 410 channel samples mainly on the top of Cerro Crespo and on its northern and eastern flanks. The mapping identified the various breccia units, while the sampling identified five areas, from northwest to southeast and referred to as Areas A, B, C, D, and E, of gold-silver mineralization with grades ranging from anomalo ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Crespo is a high sulphidation epithermal deposit and will be mined utilising open-pit methods with an average daily production of 6,850 tonnes and a stripping ratio of 1.15:1. Drilling and blasting will be carried out directly by Hochschild with earthworks being developed by contractors.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Silver M oz 18.8
Gold koz  ......  Subscription required  ......  Subscription required
Gold Equivalent koz  ......  Subscription required  ......  Subscription required
Silver Equivalent M oz  ......  Subscription required
All production numbers are expressed as metal in doré.

* According to 2012 study.

Reserves at December 31, 2019:
The Mineral Resources as of December 31, 2021 at Crespo mine are unchanged from December 31, 2019.

CategoryTonnage CommodityGradeContained Metal
Measured & Indicated 22,509,000 t Silver 40 g/t 28.8 M oz
Measured & Indicated 22,509,000 t Gold 0.42 g/t 301 koz
Measured & Indicated 22,509,000 t Silver Equivalent 74 g/t 53.2 M oz
Inferred 775,000 t Silver 46 g/t 1.1 M oz
Inferred 775,000 t Gold 0.57 g/t 14.2 koz
Inferred 775,000 t Silver Equivalent 92 g/t 2.3 M oz

Commodity Production Costs:

CommodityUnits2022
Total cash costs Silver Equivalent USD 12.7 / oz *  USD
Total cash costs Silver USD 13 / oz *  USD
Total cash costs Gold Equivalent USD 764 / oz *  USD
Total cash costs Gold USD 754 / oz *  USD
Assumed price Silver USD 23 / oz *  USD
Assumed price Gold USD 1,300 / oz *  USD
* According to 2012 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2022
Direct operating costs ($/t milled) USD 13.5 *
* According to 2012 study.

2012 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
After-tax NPV @ 0% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Subscription required - Subscription is required.


Heavy Mobile Equipment:

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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Annual Report 2016
Corporate Presentation 2016
Corporate Presentation 2016
Annual Report 2015
Corporate Presentation 2012
Press Release 2012
Technical Report 2008
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Subscription required - Subscription is required.

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