• 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
Australia
Rosemont Mine (Duketon South Operation)

This page is not tailored to
devices with screen width under 750 px.
 Location:
88 km NW from Laverton, Western Australia, Australia

  Regional Office:
Level 1, 1 Alvan Street, Subiaco
Perth
Western Australia, Australia
6008
Phone  ...  Subscription required
Fax+61-8-94-42-2290
EmailEmail
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 Australia
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 TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life2024
Regis’ board has approved development of an underground mining operation directly below the current Rosemont open pit and as part of an expansion of the existing operations.

Regis Resources has started development of its underground Rosemont gold site with an aim to achieve first ore in the September quarter of 2019.
Latest NewsRegis commences underground expansion at Rosemont     April 15, 2019


Owners & OPERATOR

 
CompanyInterestOwnership
Barminco Holdings Pty Ltd. (operator)
Maca Ltd. (operator)
Regis Resources Ltd. 100 % Indirect
Rosemont Gold Mines Pty Ltd. 100 % Direct

Deposit Type

  • Breccia pipe / Stockwork


Summary:

Rosemont gold deposit is hosted in a quartz dolerite zone of a dolerite sill intruding ultramafic and argillaceous sedimentary units of the western limb of the Erlistoun Syncline in the Duketon Greenstone Belt.

Gold mineralisation is associated with brittle fracturing and quartz albite sericite carbonate sulphide alteration within the quartz dolerite. Most gold occurs below the weathered profile in saprock and fresh rock with the upper saprolite being leached of gold.

The mineralisation trends NNW over a strike length of 4.9km and dips steeply to the east and west, varying along strike.

The geology at Rosemont has gold hosted in a steeply dipping quartz-dolerite unit intruding into a mafic-ultramafic sequence. Gold mineralisation is within a brittle quartz-dolerite phase of the Rosemont Dolerite, primarily occurring within discrete, steeply dipping, quartz-dolerite paralleled, en-echelon and stacked vein structures. The quartz-dolerite varies from 5 metres, up to 100 metres wide.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining method assumed in the Ore Reserve study is the same as that currently employed at the Rosemont Gold Mine, which utilises drill and blast, excavator and truck open pit mining. The existing pit has been designed to be developed in a series of progressive cutbacks. The Ore Reserve pit is designed as a further series of extensional cutbacks to the existing pit.

Geotechnical and hydrogeological recommendations have been applied during pit optimisation and incorporated in design with ongoing reviews. Mining dilution and ore loss factors have been dealt with in the estimation of the OK Mineral Resource.


Crushing and Grinding


Processing

  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The existing Rosemont crushing and grinding Plant and the Garden Well CIL Processing facility will be utilised to treat the Ore Reserve and a recovery factor of 94% has been assumed in the estimation of the Ore Reserve.

Recoveries & Grades:

CommodityParameter20192018201720162015
Gold Head Grade, g/t 1.521.561.491.241.26

Production:

CommodityUnits20192018201720162015
Gold koz  ......  Subscription required  ......  Subscription required1079172
All production numbers are expressed as metal in ore.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20192018201720162015
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required2.3 Mt1.8 Mt
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at March 31, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (OP) 1.8 Mt Gold 1.34 g/t 79 koz
Probable In-Situ (UG) 0.6 Mt Gold 6.44 g/t 123 koz
Probable In-Situ (OP) 4 Mt Gold 1.47 g/t 190 koz
Proven & Probable In-Situ (UG) 0.6 Mt Gold 6.44 g/t 123 koz
Proven & Probable In-Situ (OP) 5.8 Mt Gold 1.43 g/t 269 koz
Proven & Probable Total 6.4 Mt Gold 1.89 g/t 392 koz
Measured In-Situ (OP) 2.6 Mt Gold 1.21 g/t 101 koz
Indicated In-Situ (UG) 0.9 Mt Gold 5.52 g/t 169 koz
Indicated In-Situ (OP) 9.9 Mt Gold 1.14 g/t 363 koz
Inferred In-Situ (UG) 0.8 Mt Gold 5.66 g/t 145 koz
Inferred In-Situ (OP) 0.1 Mt Gold 1.21 g/t 4.87 koz
Total Resource In-Situ (UG) 1.7 Mt Gold 5.59 g/t 314 koz
Total Resource In-Situ (OP) 12.6 Mt Gold 1.19 g/t 469 koz


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 19, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 19, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Year-end Mineral Reserves 2015
Other 2011
Subscription required - Subscription is required.

News:

NewsDate
Regis commences underground expansion at Rosemont April 15, 2019
Ausdrill bags $113m Regis contract through Barminco January 21, 2019
Regis Resources set to expand Rosemont gold mine in WA August 3, 2018

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2020 MDO Data Online Inc.