• 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
Argentina
COSE (Cap-Oeste Sur Este) Mine (Manantial Espejo Operation)

This page is not tailored to
devices with screen width under 750 px.
 Location:
249 km NW from San Julian, Argentina

  Regional Office:
Avenida Cordoba 836, 7th Floor
Buenos Aires
Argentina
C1054AAU
Phone  ...  Subscription required
Fax+54-11-5533-8768
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 Argentina
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • 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

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Mechanized Cut & Fill
  • Shrinkage stoping
  • Backfill
Production Start...
The Manantial Espejo plant began processing ore mined from COSE in early September 2020.


Owners

Source: p. 86
CompanyInterestOwnership
Pan American Silver Corp. 100 % Indirect
Ownership Tree

Contractors

Subscription required - Subscription is required.


Deposit Type

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


Summary:

Exploration is focused principally on discovery and delineation of low sulfidation, Au-Ag epithermal mineralization of the type well documented throughout the Deseado Massif [e.g. White and Hedenquist (1990 &1994), Corbett, G.J. (2001) and Sillitoe, R.H. (1993)]. Mineralization typically comprises banded fissure veins and local vein/breccias characterized by high Au and Ag contents and ratios of Au:Ag generally greater than 1:10. Mineralized veins and breccias consist of quartz (coliform, banded, and chalcedonic morphologies), adularia, bladed carbonate (often replaced by quartz), and dark sulphidic material termed ginguro (fine grained electrum or Ag sulphosalts banded with quartz). Discrete vein deposits, such as at COSE, develop where mineralizing hydrothermal fluids are focused into dilatant structures, producing ore shoots which host the highest precious metal grades. Low sulfidation mineralization can also develop where mineralizing fluids flood permeable lithologies to generate large tonnage, low grade disseminated deposits (e.g. Round Mountain, Nevada; McDonald Meadows, Montana)

Mineralization at COSE is also assigned to the low sulfidation type, based on the presence of fine-grained replacement quartz and adularia, widespread illite alteration, bladed textures indicative of hydrothermal boiling, and a mineral assemblage dominated by marcasite, arsenopyrite and silver-bearing sulphosalts. The presence of anomalous copper and molybdenum associated with high ........


Mining Methods

  • Mechanized Cut & Fill
  • Shrinkage stoping
  • Backfill


Summary:

The deposit at COSE is a sub vertical, gold and silver bearing breccia that averages 0.5 m to 4 m in width and dips approximately 75° to the southwest. The interpreted ore shoot has a strike length of about 35 m, with a down dip extension of approximately 170 m. The preliminary estimate of undiluted resources is 34,000 tonnes.

The proposed method for mining the COSE deposit is mechanized cut and fill, where 3.0 m x 3.0 m access drifts to the ore are developed every 9 m, vertically, off of the access decline. Once a mining cut (3 m high, the length of the deposit) is completed, it is backfilled with un-cemented, screened, mine development waste rock, or possibly waste rock derived from the surface near the mine portal. The development waste rock will be hauled out of the mine and stored close to the access portal. 20-tonne ore haulage trucks are proposed to carry the backfill back into the mine.

Since the deposit is very small (about 34,000 tonnes undiluted), a production rate of 120 tonnes per day (3,600 tonnes per month has been estimated.

Small, epithermal vein/breccia pipe deposits are typically very irregular in both the vertical and horizontal directions. As the vein widens (> 4 m), there is generally less irregularity, and the effect of wall rock dilution is diminished substantially. However, at COSE, the deposit widths generally vary from very narrow (0.5 m) up to 5 m, with occasional wider areas.

The use of more productive s ........


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Combined production numbers are reported under Manantial Espejo Operation


Reserves at June 30, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven Mt Gold 20.56 g/t 17.4 koz
Proven Mt Silver 860 g/t 0.7 M oz
Probable Mt Gold 11.32 g/t 3.7 koz
Probable Mt Silver 185 g/t 0.1 M oz
Measured Mt Gold 1.68 g/t 2.4 koz
Measured Mt Silver 146 g/t 0.2 M oz
Indicated Mt Gold 5.55 g/t 1.4 koz
Indicated Mt Silver 218 g/t 0.1 M oz
Inferred Mt Gold 2.2 g/t 0.8 koz
Inferred Mt Silver 77 g/t



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 8, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Year-end Mineral Reserves 2018
Annual Information Form 2017
Annual Report 2017
Annual Report 2016
Preliminary Economic Assessment 2011
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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