Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Longhole open stoping
- Avoca
|
Production Start | ... |
Mine Life | 2030 |
Extensive exploration and resource development drilling programs in the Pajingo mine during the 2020 year indicate that open pit resources may become available for mining and milling in 2022 while also increasing the underground resource and reserve base.
Production data was not available from 2018 to 2021. |
Source:
Since its initial discovery, there has been various ownership changes of Pajingo with Minjar Gold acquiring the operation from Evolution Mining at the end of August 2016.
Contractors
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Deposit Type
- Vein / narrow vein
- Epithermal
Summary:
Pajingo mine is located in a group of sedimentary rocks within the Drummond Basin.
The Pajingo mine's mineralisation is hosted in structurally controlled epithermal quartz veins within an andesite host rock. In general, veining strikes grid east and is steeply dipping. Mineralisation plunges towards the east, with internal high grade zones plunging towards the west. High grade zones typically return multiple assays >100g/t.
Most ore bodies comprise a main vein, which carries the bulk of the precious metals, and splay veins that can contain economic grades but are less continuous than the main vein. The mineralised structures can vary from less than one metre to 15 metres in width, but are generally one metre to three metres wide.
Major fault structures in the Pajingo area trend dominantly northeast and northwest. These
major faults are possibly related to reactivation of original graben blocks first generated
during extension and formation of the original basin. Fault, shear and gentle fold
development of late Palaeozoic and older geology result from multiple tectonic events along
the eastern margin of the continent. These events resulted in volcanic arcs and mountain
building with associated pulses of mid to upper level igneous intrusive bodies. Surface
expressions of major folds in the northern most end of the Drummond, display axial planes in
a northeast orientation (Hutton 1989).
Mining Methods
- Longhole open stoping
- Avoca
Summary:
The mining methods utilised at Pajingo Mine throughout the life of the mine include underground and open cut mining. Underground ore is produced via a portal at Vera, which leads, by underground decline, to adjacent ore sources. Underground mining methodology uses avoca, narrow vein and longhole open stoping. This system is proven and well understood in Australia and provides for a low-risk method for the scale of mining, ground conditions and ore body geometry.
The Pajingo operation has produced more than 2.7 million ounces since 1996. Underground mining is based on modified avoca and long hole open stoping methods with ore hauled to surface via decline.
Access: 5m x 5.5m decline; 1:8 average gradient; 450-550m per month of development; 700m vertical depth at the deepest resource.
A new style of mining was in place in one of the underground areas where a thin skin of remnant ore is being extracted against the backfilled stopes of previously mined ore lodes.
Source:
Flow Sheet:
Summary:
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Production:
Commodity | Units | 2022 | 2017 | 2016 |
Gold
|
oz
| ...... | 10,991 | 68,630 |
Silver
|
oz
| | ...... | ...... |
All production numbers are expressed as metal in doré.
Operational Metrics:
Metrics | 2018 | 2017 | 2016 |
Ore tonnes mined
| | 62 kt | 418 kt |
Annual processing capacity
| 700 kt | | 650 kt |
Tonnes processed
| | 75 kt | 422 kt |
Reserves at March 31, 2021:
Category | Tonnage | Commodity | Grade | Contained Metal |
Measured
|
452,300 t
|
Gold
|
12.79 g/t
|
186,000 oz
|
Indicated
|
2,303,100 t
|
Gold
|
7.17 g/t
|
531,200 oz
|
Inferred
|
4,585,100 t
|
Gold
|
6.01 g/t
|
885,300 oz
|
Total Resource
|
7,340,500 t
|
Gold
|
6.79 g/t
|
1,602,500 oz
|
Commodity Production Costs:
| Commodity | Units | 2017 |
All-in sustaining costs (AISC)
|
Gold
|
AUD
|
1,422 / oz
|
C1 cash costs
|
Gold
|
AUD
|
897 / oz
|
All-in costs
|
Gold
|
AUD
|
1,577 / oz
|
Financials:
| Units | 2022 | 2017 |
Sustaining costs
|
M AUD
| |
2.8
|
Capital expenditures
|
M AUD
| |
3.6
|
Revenue
|
M AUD
| |
17.5
|
Operating Income
|
M
| ...... |
|
After-tax Income
|
M
| ...... |
|
EBITDA
|
M
| |
2.6 AUD
|
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Corporate Filings & Presentations:
Document | Year |
...................................
|
2023
|
...................................
|
2023
|
...................................
|
2022
|
Fact Sheet
|
2020
|
Other
|
2020
|
Annual Report
|
2017
|
Fact Sheet
|
2016
|
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