Currently comprising of one operating underground mine (Bentley) producing zinc and copper rich ore.
The Jaguar Operation is an owner-operated underground mine, that predominately uses long-hole stoping with backfill. Ore is hauled to the surface using dump trucks and then transported to the nearby Jaguar Mill for processing.
Jaguar is a small mine site, with approximately 150 persons on site at any one time, resulting in a family-type feel to the camp.
Jaguar has a strong focus on safety and productivity, with a current mine life of 4 years.Less
Round Oak’s Mt Colin operation is an underground copper / gold mine located half way between Mount Isa and Cloncurry in North West Queensland. Development commenced in August, 2018 with first production in September 2019. Ore is transported by road trains to the Ernest Henry mine north of Cloncurry for toll processing. First processing of ore was in October 2019.
The mine will extend down around 360m vertically beneath the base of an original open pit. The copper/gold ore is hosted in a steeply dipping lenticular skarn rock formation. The orebody extends over a length of around 250m at widths up to 12km. Ore is extracted by contract miners using productive, modern, mechanised mining techniques. Production rate is nominally 420,000t/yr of a year delivering around 9500t/yr copper metal and 3300oz/yr of gold.
The operation employs around 80 personnel, and will through until August 2022, though exploration to find extensions to the ore zones is expected to extend the mine life. Fly in / fly out workers are accommodated on site in a modern 66 man camp.Less
The Stockman Project is located in the Victorian Alps region, approximately 469km by road northeast of Melbourne. The site is accessed from the north-east of Omeo (pop. 406) via the town of Benambra (pop. 149). Stockman currently has plans to mine two copper-zinc deposits, Wilga and Currawong, discovered by WMC Resources/BP Minerals in 1978 and 1979, respectively. The Wilga deposit was acquired and mined by Denehurst Ltd from 1992 to 1996, who also held other mining operations and interests in Australia (notably the Woodlawn base metals mine near Canberra). During Denehurst’s ownership 955,000t were mined from Wilga producing 215K tonnes of copper concentrate and 48K of zinc concentrate.
In 1996, Denehurst was placed into administration and immediately ceased all mining activities at Wilga with liability for the abandoned site eventually transferred to the Victorian state government who oversaw surface rehabilitation works (mill site, tailings storage area, core farm) completed in 2005/06.
In June 2007, the Stockman Project was acquired by Jabiru Metals Ltd following a competitive tender conducted by the Victorian Government . Jabiru Metals was later acquired by Independence Group NL (IGO) in June 2011 who discovered Eureka and Big Foot lodes in close proximity to the Currawong deposit in 2012 and 2013 respectively.
Round Oak Minerals Pty Ltd (formerly CopperChem Pty Ltd at the time), completed the acquisition of the project from IGO in December 2017 and continue to progress the permitting and approvals process. In April 2017 Round Oak received the final primary approval (Mine Work Plan) and completed a Selection Phase Study in mid-2019.
The Stockman Project will comprise two underground mines: the Wilga Mine which was previously worked as part of the Benambra Mine operated by Denehust; and the development of a new mine at Currawong. The mining operations will have a combined production rate of 1.0Mtpa over an initial 9 year mine life, feeding an on-site processing facility that will produce copper and zinc concentrates containing approximately 148,906t of payable copper, 260,603t of payable zinc, 4.38Moz of payable silver and 270,124oz of payable gold. Additional infrastructure including an on-site gas-fired power station and a 218 room accommodation village will be required to support the operation and the project workforce. The project construction phase will require approximately two years to complete.
Both mines will use modern conventional mining methods to extract the ore. The underground voids created by stoping will be backfilled using paste fill, which is a combination of mine tailings and cement type binding agent, and rock fill. Ore will be trucked to surface and hauled to the processing plant stockpile for treatment. Waste will be stored temporarily on the surface and re-used as mine fill underground or stored permanently in the tailings storage facility.
The new process plant with a 1Mtpa nameplate capacity will be constructed near the Currawong mine. Ore from underground will undergo conventional crushing and grinding before being treated using sequential flotation to produce copper and zinc concentrates. The concentrates will be loaded into steel half height storage containers for transport to port for shipping to local and overseas smelters. The containers will be loaded onto dedicated road trains and transported along the Great Alpine Road to Bairnsdale then along to a port which is yet to be selected. The containers will be stored at the port with concentrates emptied inside the ship’s hold and empty containers backloaded to site for refilling.
Tailings from the process plant will be used to produce paste fill for backfilling underground mining voids. Surplus tailings will be placed in the existing surface tailings storage facility which will be recommissioned during construction.
In February 2021, the Round Oak Board approved funding to commence the Definition Phase Study (DPS) for the Stockman Copper-Zinc Project which will build upon the Selection Phase Study (SPS) completed in 2019. This is the final step prior to the Project going to the Board for approval to commence construction and is expected to take 12 months to complete. The objective of the study is to assess a number of upside opportunities that have been identified for the existing base case of the Project, further strengthening its position. The main site activities will include an initial diamond drilling program to collect samples required for metallurgical test work, with drilling to be undertaken using existing drill pads and access tracks. All primary approvals are in place for the development of the project and the secondary approvals required to progress to construction will also be obtained as part of the DPS.Less
The Barbara Operation is an open pit copper mine located approximately 67kms north-east of Mt Isa on the Lake Julius Road. The site consists of an administration area, an open pit mine with associated waste rock dump, and a run-of-mine stockpile area for ore. These facilities are connected by a haul road system that supports a water management / pumping system that affords the site a zero release status.
The site operates on a continual basis 24 hours a day, supported by people working three panel 14 days on 7 days off roster, two 12 hour shifts per day. Approximately 30% of the people working at Barbara reside locally with the rest on a fly-in / fly-out basis, accommodated in camp facilities in Mt Isa. Personnel are bussed in and out of the site from Mt Isa at the start and end of each shift. The operation engages approximately 100 personnel with approximately 30 people on dayshift and 20 people on nightshift at any given time. The operational personnel are predominately contractors, managed by a small team of Round Oak staff.
The mining operation is a conventional drill and blast / load and haul operation. The drilling is conducted by a contractor utilising 3 x top hammer drill rigs, drilling 102mm diameter blast holes. Another contractor provides a complete down the hole load service for the supply of explosives and blasting, on a product supply basis. The mining fleet consists of 190t and 120t excavators loading 135t rigid body haul trucks, supported by an ancillary fleet of dozers, graders, water trucks and front end loaders. This equipment is supplied and maintained on a dry hire basis from an equipment supplier on an hourly rate with an availability guarantee. This mining combination excavates approximately 12,000 bank cubic meters per day. Ore is stockpiled on the run-of-mine stockpile area and crushed to 200mm at approximately 2,500 t/d (crushing operates five days a week). Approximately 55,000t of this crushed ore at a grade of approx. 2% copper is transported to Glencore’s Mt Isa processing facility each month to produce copper concentrate.Less
The Cloncurry operations are located at The Great Australia Mine, three kilometres to the south-east of Cloncurry in north-west Queensland. The site consists of the main administration area, warehouse and maintenance facilities and separate gold and copper processing facilities including a three-stage crushing plant. Gold is processed using a traditional carbon in pulp (CIP) process and the copper processing is completed using either solvent extraction (SX) and crystal plants for oxide heap leach ores, or a conventional flotation plant for sulphide ores.
The current focus of the operation is on gold extraction with the plant operating at 85 tonnes per hour treating ore with an average feed grade of 1.7 grams per tonne. Both copper processing facilities are currently on care and maintenance.
The gold ore processed at Cloncurry is mined from several satellite open pits located within the effective operating (haulage) radius of the central processing facilities. The Wallace South Mine is situated 39 kilometres to the south-east of Cloncurry. Gold ore is mined at Wallace using conventional open pit mining techniques utilising a fleet of rear dump trucks and large excavators. Ore is then trucked to the Cloncurry processing facilities. Two pits are operational at Wallace South with its mine life extending until late 2019. Once completed rehabilitation is planned to ensure minimal environmental disturbance through returning the land back to grazing.
Once Wallace South is completed, mining is planned to commence on the Wynberg mine which is a neighbouring lease to the north of Wallace South. Up to four open pits are planned to be developed at Wynberg (one main pit with three smaller pits), again using conventional open pit mining techniques. The life of mine for the Wynberg deposit is expected to be less than one year.
Approximately 50 people are employed at the Cloncurry operations with approximately 25% residing locally. Wherever possible Round Oak Minerals is keen to develop close relationships with the community and has participated in local events such as the Cloncurry Merry Muster and the Cloncurry Show.Less
The White Dam Gold mine is a heap leach operation located in north-east South Australia, 75 kilometers from Broken Hill. It is wholly owned by Round Oak subsidiaries Exco Operations (SA) Pty Ltd and Polymetals Operations Pty Ltd (50/50). White Dam commenced operations in 2009, and since that time, 7.3 million tonnes of ore has been mined from two open pits to produce over 170,000oz of gold. Mining was completed at White Dam in 2017 with active leaching of the heap ongoing. With the operation at the latter stage of its operational life, processing of solution from the heap is being undertaken as a batch processes rather continuous operation.
In addition to the mining operations White Dam holds three exploration licenses covering approximately 488km2 of prospective ground in the surrounding area.Less