Overview
| Stage | Production |
| Mine Type | Open Pit & Underground |
| Commodities |
|
| Mining Method |
- Truck & Shovel / Loader
- Longhole open stoping
- Paste backfill
|
| Production Start | ...  |
| Mine Life | 10 years (as of Jan 1, 2018) |
Since December 2019, the Jundee operations are part of Yandal Operations.
The Jundee Operations include Jundee and satellite mines of Julius and Ramone, and a processing plant. |
Source:
p. 27,40
The Jundee Gold Mine (JGM) owned and operated by Northern Star Resources Ltd (NSRLtd).
Sixty-three of the Leases are registered in the name of Newmont Yandal Operations Pty Ltd but Northern Star Resources Limited are the beneficial owners.
Contractors
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Deposit Type
- Vein / narrow vein
- Breccia pipe / Stockwork
Summary:
Jundee
Jundee is an Archean gold mineralised deposit that is part of the Northern Yandal Greenstone belt. Gold mineralisation is controlled by a brittle fracture-system, is commonly fracture-centred, and is predominantly hosted in dolerite and basalt. Mineralisation can be disseminated or vein style host.
Jundee Open Pit
Mineralized zones are variable with true width ranging from 0.5m to 20m. They are extensive along strike and down dip, up to 450m and 350m, respectively. Depth from surface is 350m approximately.
Jundee Underground
Mineralised zones are narrow, with true width ranging from 0.3 to 1m, but can be up to 5m. They are extensive along strike and down dip, up to 1000m and 500m, respectively, but are often highly discontinuous, and generally have a tabular geometry.
Depth = surface to ~1710mRl (~845m below surface).
Jundee (Ramone)
Ramone is Archean gold mineralised deposit that is part of the Northern Yandal Greenstone belt. Gold mineralisation is hosted by a granite and controlled by a brittle stockwork fracture-system within a north-easterly trending shear zone. The mineralisation formed by a stockwork of veins with smoky quartz, sulphides, minor carbonate, chlorite and sericite hosted by a monzonitic granite. The mineralisation is intruded by an east-west striking (about 096 degrees) vertical dolerite dyke that cross cuts the mineralisation and is part of a suite of magnetic dolerite dykes that intrudes the Yandal belt in an east-west direction.
Mineralise ........
Mining Methods
- Truck & Shovel / Loader
- Longhole open stoping
- Paste backfill
Summary:
The Jundee operations consists of underground and open pit feed sources and a processing plant.
Three underground portals are in use which provide access to the various underground lode structures, namely the Barton, Gateway and Invicta portals. The Barton portal contains three active ore bodies (Nim3, Lyons and Westside) with development access well advanced in the Armada lode, whilst Invicta consists of the Invicta (remnants), Cardassian, Wilson and Deakin ore bodies. Gateway and Gringotts ore bodies are both mined via the Gateway portal, again with development access well advanced in the Revelation and Nexus lodes. Recent exploration has uncovered a new prospective mining area at depth (Zodiac).
The mining process is a geological driven model and production intensive due to the narrow vein nature and lithology of the ore bodies. There is a necessity for controlled mining practices to minimise the amount of waste dilution incurred during the ore extraction process. In general, the ore is mined using top-down long-hole (uphole) open stope bench retreat mining. The benches are nominally 20m apart (vertically). The lode structures have a dip of between 35-70 degrees and have multiple orientations. The mining method typically extracts the ore in 30-50m panels separated by 5-10m rib pillars which remain in-situ to provide geo-mechanical stability and support. For ore structures that dip between 25.0 degrees and 35.0 degrees the ore is extracted using manual mining techniques ........
Source:
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Source:
Summary:
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Production:
| Commodity | Units | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|
Gold
|
oz
| ...... | ...... | ...... | ...... | 283,288 | 233,556 | 209,515 |
All production numbers are expressed as metal in doré.
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Operational Metrics:
| Metrics | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Annual processing capacity
| ...... | ...... | 2.7 Mt | | 1.8 Mt | |
|
Ore tonnes mined
| ...... | ...... | 3,464,189 t | 2,092,558 t | 1,678,592 t | 1,473,241 t |
|
Tonnes milled
| ...... | ...... | 2,299,724 t | 2,207,099 t | 1,839,273 t | 1,527,479 t |
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Reserves at March 31, 2022:
Jundee Open Pit: Mineral Resources are reported at a 0.6g/t cut-off grade.
Jundee (Ramone): Mineral Resources are reported at a 0.45g/t cut-off grade.
Jundee (Julius): Open pit resources have been reported through MSO generation using a 0.68 g/t Au cut-off grade.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
2,473 kt
|
Gold
|
1.1 g/t
|
89 koz
|
|
Probable
|
13,006 kt
|
Gold
|
3.9 g/t
|
1,651 koz
|
|
Proven & Probable
|
15,479 kt
|
Gold
|
3.5 g/t
|
1,740 koz
|
|
Measured
|
2,506 kt
|
Gold
|
1.1 g/t
|
90 koz
|
|
Indicated
|
42,854 kt
|
Gold
|
2.9 g/t
|
4,017 koz
|
|
Inferred
|
16,670 kt
|
Gold
|
2.5 g/t
|
1,319 koz
|
|
Total Resource
|
62,029 kt
|
Gold
|
2.7 g/t
|
5,425 koz
|
| Type | Material | Diameter | Length | Description |
Corporate Filings & Presentations:
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