• 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
Bardoc Project

This page is not tailored to
devices with screen width under 750 px.
 Location:
40 km N from Kalgoorlie, Western Australia, Australia

  Project Contacts:
130 Stirling Highway
Locked Bag 4
North Fremantle
Western Australia, Australia
6159
Phone  ...  Subscription required
Fax+61-(0)8-6215-0091
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
  • Costs & Financials
  • 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

StageFeasibility
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping
  • Backfill
Processing
  • Gravity separation
  • Carbon re-activation kiln
  • Dewatering
  • Intensive Cyanidation Reactor (ICR)
  • Smelting
  • Flotation
  • Carbon in leach (CIL)
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life9 years (as of Jan 1, 2021)
Latest NewsSt Barbara completes Bardoc acquisition     April 27, 2022


Owners

Source: p. 2
CompanyInterestOwnership
St Barbara Ltd. 100 % Indirect
On 13 April 2022, St Barbara completed the acquisition of all the issued shares of Bardoc Gold through the implementation of a scheme of arrangement (Scheme). The new St Barbara shares issued under the Scheme commenced trading on 14 April 2022.

Deposit Type

  • Breccia pipe / Stockwork


Summary:

The deposit occurs on the eastern limb of a narrow NNW trending structure, the Bardoc-Broad Arrow syncline within the Bardoc Tectonic Zone. In this zone the sequence comprises highly deformed fault slice lenses of intercalated Archaean mafic and ultramafic volcanics and metasediments.

Gold mineralisation is predominately hosted within a 300 to 400m wide differentiated dolerite emplaced into the mafic/ultramafic-sediment sequence. The geological setting, structure and style of gold mineralisation show a distinct similarity to that seen at Paddington and the Broad Arrow deposits 12 to 16km to the south.

The Zoroastrian dolerite is thought to be the stratigraphic equivalent of the Paddington dolerite which hosted the 1m+ ounce mine at Paddington itself with both deposits bounded to the west by the Black Flag sediments and to the east by the Mount Corlac ultramafics. Shear zones up to 10m wide containing gold bearing laminated quartz veining (5cm to 1m wide) occur on both contacts.

The Zoroastrian South has been the main focus of drilling since the discovery of the stockwork system within the granophyric unit. Here drilling has been conducted beneath a series of historical shallow workings on narrow quartz veins resulting in the discovery of a large body of gold mineralisation at depth.

The Slug Hill/Breakaway area at Zoroastrian South represents a distinct magnetic/gravity high that appears to be folded (or boundinaged) with closure to the south. Sediments and high magnesium basalts/ultramafics are clearly seen in outcrop but have not been intersected and/or identified in drilling beneath the outcrop. Drilling instead has intersected a differentiated dolerite with a granophyric unit hosting gold mineralisation associated with arsenopyrite rich quartz stockwork/breccia. The magnetic high is instead related to a pyrrhotite rich zone within the dolerite with the gold mineralisation occurring predominately within and adjacent to its margins. 3D modelling suggests that the magnetic zone has a similar 30-40 degree plunge to the north similar to the gold mineralisation.


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping
  • Backfill


Summary:

UNDERGROUND
The Project consists of two underground mines, Zoroastrian and Aphrodite. The Zoroastrian mine is planned to commence off the southern end of the existing Zoroastrian central pit and is the priority focus due to the high-grade, free-milling nature of the ore, and the ability to rapidly commence mining activities. The Aphrodite Underground extends from the base of the Aphrodite Stage 1 Pit. Both underground mines will extract ore from multiple lode systems which are open in all directions. Additional lodes are expected to be encountered as underground mining progresses with progressive underground exploration drilling, currently cost prohibitive from surface.

DESIGN OVERVIEW
Gold is estimated and reported within the underground models to be evaluated within the processing and financial summaries. All ore planned to be extracted from the mines is contained within fresh rock. In order to determine the economically mineable part of the resource, the total value of the gold mineralised material was calculated.

ZOROASTRIAN UNDERGROUND
The Zoroastrian Underground is located at, and will be accessed off, the southern end of the existing Zoroastrian Central Pit.

The underground mine is designed to be accessed off a portal from the southern end of the existing Zoroastrian pit. Lateral development will be carried out using conventional mechanised drill and blast techniques, using twin-boom jumbos.

Stoping will be carried out via a top-down mining method using conventional mechanised sub-level longhole open stoping techniques, utilising rib and sill pillars for void stability and dilution control. Level spacing for the stoping is 20m floor-to-floor with typical 15.5m up-dip stope heights. No fill is designed to be used, although where benefit may be realised to reduce trucking requirements, filling may be implemented.

APHRODITE UNDERGROUND
Mining at Aphrodite is proposed to commence following the completion of the Stage 1 pit, which will provide an adequate location to commence a decline portal in fresh and competent rock material. Based on this, Bardoc will prioritise mining of the Aphrodite Stage 1 pit for the commencement of underground activities at Aphrodite as early as possible.

The underground mine is designed to be accessed off a portal from the northern end of the proposed Aphrodite Stage 1 Pit. Lateral development will be carried out using conventional mechanised drill-andblast techniques, using twin-boom jumbos.

Stoping will be carried out via a top-down mining method using conventional mechanised sub-level longhole open stoping techniques, utilising rib and sill pillars for void stability and dilution control. Level spacing for the stoping is 20m floor-to-floor with typical 15.5m up-dip stope heights. No fill is designed to be used, although where benefit may be realised to reduce trucking requirements, filling may be implemented.

OPEN PIT MINING
The Bardoc open pits consist of the Excelsior, Zoroastrian, Aphrodite, Bulletin South and Mayday open pits, which will be mined using conventional open pit mining methods. It is proposed for the larger pits that 190- tonne excavators will be used with a fleet of 90-tonne dump trucks.

Open pit mining is planned on a double-shift continuous roster basis, using both a 120-tonne and a 190- tonne excavator loading 90-tonne dump trucks, with mining benches approximately 5m in height.

The 120 tonne excavator fleets are expected to commence the open pit mining of the Zoroastrian North and Bulletin South pits. 190 tonne excavator fleets will be utilised to commence the Excelsior and Aphrodite pits to service the initial waste stripping, after which each of the projects will transition back to 120 tonne excavator fleets. All other pits will utilise the 120 tonne excavator fleets.


Crushing and Grinding
Flow Sheet: Source
Crusher / Mill TypeModelSizePowerQuantity
Jaw crusher 1
Pebble crusher 132 kW 1
SAG mill 6.7m x 4.7m 4100 kW 1
Ball mill 5.5m x 8.7m 4100 kW 1

Summary:

The circuit comprises of:
• Primary Jaw crushing capable of operating at a nominal rate of 300 t/h (based on 80% availability). The crusher product size is targeted at 80% passing 125mm to provide suitable lump size for autogenous grinding;
• A surge bin with cast off radial stacker conveyor to generate separate refractory and free milling stockpiles;
• A SAG mill which is a 6.7m (IS) diameter by 4.7m (EGL) long and powered by a 4,100kW variable speed motor. A polyurethane trommel screen will remove oversize and direct them to the pebble crushing circuit;
• A pebble crusher with a 132kW motor and operated with a closed sized setting of 13mm, which discharges into the SAG mill feed conveyor;
• A Ball mill which is a 5.5m (IS) diameter by 8.7m (EGL) long and powered by a 4,100kW variable speed motor. A 12mm aperture polyurethane trommel screen will remove oversize and deposit it into the scats bunker;


Processing

  • Gravity separation
  • Carbon re-activation kiln
  • Dewatering
  • Intensive Cyanidation Reactor (ICR)
  • Smelting
  • Flotation
  • Carbon in leach (CIL)
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

PROCESS PLANT
The Bardoc Processing Plant is designed to treat both free-milling and refractory ore. The plant will be designed for construction in two stages. Stage 1 will consist of CIL processing, while Stage 2 is an upgrade to include the flotation and dewatering circuits to treat the Aphrodite refractory material to be mined in year 2. Concentrate generated from the flotation circuit will be sold into a concentrate sale agreement as described in Section 2.

The Bardoc Stage 1 Processing Plant has been designed to treat free-milling ore from multiple sources. The plant design is based on a nominal throughput of 2.1 Mtpa The mill throughput rate, based on 8,000 operating hrs per annum (91.3% availability), is 262.5 t/h. The comminution circuit is designed for processing the harder fresh ore. When processing a blend that includes oxide and transitional a higher throughput will be achieved. The downstream circuit design allows this higher throughput.

Recoveries & Grades:

CommodityParameterAvg. LOM
Gold Concentrate Grade, g/t 66.1
Gold Recovery Rate, % 95.5
Gold Head Grade, g/t 2

Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Concentrate kt 292
Gold Metal in doré koz 505
Gold Metal in concentrate koz 593
Gold Metal in conc./ doré koz 1361,097

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at March 29, 2021:

CategoryTonnage CommodityGradeContained Metal
Probable 15,874 kt Gold 2 g/t 1,007 koz
Measured 152 kt Gold 2.3 g/t 11 koz
Indicated 36,338 kt Gold 1.7 g/t 2,044 koz
Inferred 18,063 kt Gold 1.8 g/t 1,018 koz
Total Resource 54,597 kt Gold 1.8 g/t 3,073 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold AUD  ......  Subscription required *
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required *
Assumed price Gold AUD  ......  Subscription required *
* According to 2021 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2021
UG mining costs ($/t milled) AUD 15.2 *
OP mining costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
Total CapEx $M AUD  ......  Subscription required
OP OpEx $M AUD  ......  Subscription required
UG OpEx $M AUD  ......  Subscription required
OP/UG OpEx $M AUD  ......  Subscription required
Processing OpEx $M AUD 302.6
Transportation (haulage) costs $M AUD 33.9
G&A costs $M AUD 60.9
Total OpEx $M AUD  ......  Subscription required
Total Taxes $M AUD  ......  Subscription required
Royalty payments $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
Net revenue (LOM) $M AUD  ......  Subscription required
EBITDA (LOM) $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
After-tax Cash Flow (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 6% $M AUD  ......  Subscription required
After-tax NPV @ 6% $M AUD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 7, 2021
....................... Subscription required ....................... Subscription required Subscription required May 7, 2021
....................... Subscription required ....................... Subscription required Subscription required May 7, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Annual Report 2017
Technical Report 2017
Press Release 2014
Subscription required - Subscription is required.

News:

NewsDate
St Barbara completes Bardoc acquisition April 27, 2022
St Barbara to acquire Bardoc Gold via Board recommended scheme of arrangement December 20, 2021
GR Engineering to build Bardoc processing facility August 10, 2021
Bardoc Gold to jump into mid-tier March 30, 2021

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2022 MDO Data Online Inc.