• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Mexico
Cusi Mine Expansion Project (Cusi)

This page is not tailored to
devices with screen width under 750 px.
 Location:
17 km S from Ciudad Cuauhtemoc, Chihuahua, Mexico

  Project Contacts:
Blas Cano de los Rios #500, Col. San Felipe
Chihuahua
Chihuahua, Mexico
C.P. 31203
Phone  ...  Subscription required
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Mexico
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Silver
  • Lead
  • Zinc
  • Gold
Mining Method
  • Bench & Fill
  • Room-and-pillar
  • Backfill
Production Start...
Mine Life13 years (as of Jan 1, 2020)
A strategic review of Cusi is underway, changes have been made to the organizational structure to better align all operations and achieve goals, and with a heightened focus on ESG, the Company’s inaugural sustainability report is planned for completion in 2022.


Owners

Source: p. 39
CompanyInterestOwnership
Sierra Metals Inc. 100 % Indirect
Dia Bras Mexicana SA de CV (operator) 100 % Direct
Dia Bras Mexicana is a wholly-owned subsidiary of Sierra Metals.

Contractors

Subscription required - Subscription is required.


Deposit Type

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


Summary:

Mineral Deposit
Mineralization at the Cusi Mine has been variously described as a) low-sulfidation epithermal (Ciesielski, 2007), b) high-sulfidation epithermal (SGS, 2008) and linked epithermal-base metal system (Meinhert, 2006). Meinhert (2006) notes that although shallow (<100 m) historic mining is reported to have encountered grades exceeding 1,000 oz/ton Ag, the veins currently exposed are more base-metal rich than would be expected in an epithermal system. However, Sierra Metals geologists consider the abundance of base metals on the property to be primarily a function of depth of exposure and SRK agrees with this interpretation. Mineralization occurs along narrow fractures containing quartz, sphalerite and galena, and wall rock alteration consists primarily of silicification and the development of clays and iron oxides. The veins contain quartz with crustiform and banded textures typical of epithermal systems.

The current geologic model for the Cusi property is described as follows:

The country rock on the property consists primarily of felsic volcanics interpreted to represent a caldera with a resurgent dome. Magma is interpreted to have intruded along the Cusi fault, a regional NW-trending, right-lateral strike-slip fault, and a subsequent eruption produced the collapsed caldera and Upper Volcanic Series felsic tuffs. A resurgent dome then arose within the caldera on the western side of the Cusi fault. This dome was then dissected by numer ........


Mining Methods

  • Bench & Fill
  • Room-and-pillar
  • Backfill


Summary:

Bench and fill mining method is currently used in the main areas of the mine and to a lesser extent, room and pillar mining is also used. The mining method used varies depending on geotechnical constraints, mineralization trends, dimensions, and mine production targets.

Using the updated Mineral Resource estimate, Sierra Metals performed an expansion analysis to determine how the Cusi mine could achieve higher sustainable production rates. The analysis indicated that higher production rates are achievable through the massification of the bench and fill mining method in the new production areas, which will allow the sustainability of the operation. A new configuration of the mining method will allow obtaining a greater recovery of mining resources and increasing productivity.

Current production at Cusi comes from the Promontorio and Santa Rosa de Lima mineralized zones. Mineralized material is currently hauled to the surface using one of several adits or declines accessing the mineralized zones, and is then dumped onto small pads outside of the portals.

The mining sequence through this method is of a descending type, that is, the upper levels are mined, while in the lower ones the necessary preparations are made to start mining once the mineralized material has been extracted from the upper stopes. Within a sublevel, mining is carried out in retreat, starting at the ends of the stope and retreating towards the entrance.

In Cusi, min ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsLOM
Silver M oz 33
Lead kt  ......  Subscription required
Zinc kt  ......  Subscription required
Gold koz  ......  Subscription required
All production numbers are expressed as payable metal.

Operational Metrics:

Metrics
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at August 31, 2020:
Mineral resources are reported at a single cut-off grade of 95 g/t AgEq.

CategoryTonnage CommodityGradeContained Metal
Measured 850 kt Silver 213 g/t 5.8 M oz
Measured 850 kt Lead 0.26 % 4.9 M lbs
Measured 850 kt Zinc 0.3 % 5.6 M lbs
Measured 850 kt Gold 0.06 g/t 1.7 koz
Measured 850 kt Silver Equivalent 231 g/t 6.3 M oz
Indicated 4,506 kt Silver 176 g/t 25.5 M oz
Indicated 4,506 kt Lead 0.54 % 53.4 M lbs
Indicated 4,506 kt Zinc 0.63 % 62.3 M lbs
Indicated 4,506 kt Gold 0.13 g/t 18.5 koz
Indicated 4,506 kt Silver Equivalent 212 g/t 30.7 M oz
Measured & Indicated 5,356 kt Silver 182 g/t 31.3 M oz
Measured & Indicated 5,356 kt Lead 0.49 % 58.3 M lbs
Measured & Indicated 5,356 kt Zinc 0.58 % 68 M lbs
Measured & Indicated 5,356 kt Gold 0.12 g/t 20.2 koz
Measured & Indicated 5,356 kt Silver Equivalent 215 g/t 37 M oz
Inferred 4,893 kt Silver 146 g/t 23 M oz
Inferred 4,893 kt Lead 0.43 % 46.1 M lbs
Inferred 4,893 kt Zinc 0.69 % 74.8 M lbs
Inferred 4,893 kt Gold 0.18 g/t 27.7 koz
Inferred 4,893 kt Silver Equivalent 183 g/t 28.8 M oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Silver Equivalent USD  ......  Subscription required&nbs
Assumed price Lead USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2020
Total operating costs ($/t milled) USD 35.2 *
* According to 2020 study.

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Expansion CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Working capital $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 132.1
G&A costs $M USD 14
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
EBITDA (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $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
After-tax IRR, %  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of August 31, 2020:
HME TypeSizeQuantity
ANFO Loader ....................... 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 required ....................... Subscription required
....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 31, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 31, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.