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Mount Isa Copper Operation
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Location:
1 km W from Mount Isa, Queensland, Australia
Address:
Private Mail Bag 6
Mount Isa
Queensland, Australia
4825
...
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Overview
Stage
Production
Mine Type
Underground
Commodities
Copper
Gold
Silver
Mining Method
Sub-level open stoping (SLOS)
Cemented paste backfill
Production Start
...
Mine Life
2027
Mount Isa Mines is the second largest copper producer in Australia.
Mount Isa Mines copper operations consist of Enterprise underground mine, X41 underground mine, Black Rock Cave mine, Copper Concentrator and Copper Smelter.
Latest News
Queensland Government backs Mount Isa mining jobs
February 19, 2024
Owners
Source:
p. 17
Company
Interest
Ownership
Glencore plc.
100 %
Indirect
Contractors
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Deposit Type
Breccia pipe / Stockwork
SEDEX
Summary:
The Mount Isa copper orebody as a whole covers an extent of over 4kms and a vertical extent of 1800 metres (Lilly et al, 2017). Cu mineralisation occurs in extensive zones of silica-dolomite alteration. The main mineralised bodies include the 1100, 1900, 200, 500, 650, 3000 and 3500 orebodies. The Cu orebodies fall into two broad orientation groups: the 500, 1900N and 3500 orebodies are broadly stratabound and dip west at between 60 and 80 degrees; and the 1100, 1900S, 3000, 200 and 650 orebodies dip moderately to steeply west-southwest (ie with an approximate 15 degree sinistral rotation from the orientation of bedding) (Miller, 2007). The 1100, 1900, 3000 and 3500 orebodies show local plunge variations which are broadly parallel to the intersection between bedding in the Urquhart Shale and the underlying basement contact with the Eastern Creek Volcanics. The 1100 and 1900 orebodies show a subhorizontal plunge, while the 3000 and 3500 orebodies plunge moderately to the north. The 200, 500 and 650 orebodies also show a moderate north plunge. The Mount Isa Cu and Zn-Pb-Ag deposits are hosted within the Mesoproterozoic Urquhart Shale of the 1670Ma Mount Isa Group. Major Host Rock: Variably laminated mudstones and siltstones which vary from siliceous to carbonate-rich, with significant and extensive accumulations of fine grained pyrite. Minor Host Rock: A minor amount of copper mineralisation and associated alteration occurs in the Spear Siltsone, which overlies the Urquhar ........
Mining Methods
Sub-level open stoping (SLOS)
Cemented paste backfill
Summary:
The copper orebodies are accessed via two vertical shafts as well as a decline from surface. The X41 shaft services the southern portion (X41 mine) of the copper operations, whilst the R62 shaft services the northern deep portion (Enterprise mine) of the copper operation. The decline is used for the movement of large equipment as well as for egress. A further two vertical shafts are used for hoisting of ore. These are U62 and M62 shafts. M62 shaft is an internal shaft and hoists ore from the Enterprise mine. The ore from both Enterprise mine and X41 mine is hoisted up the U62 shaft to surface.
In the Mount Isa copper mine orebodies, sub-level open stoping, coupled with secondary and tertiary stoping is used to extract the ore. Blocks of ore 40 m-wide, 40 m-long at full orebody height are removed. To do this, 5.0 m x 5.0 m drilling sublevels are developed at 40 m intervals. At the bottom of the stope, a number of drawpoints are mined and equipped to extract the ore.
The broken ore falls to the bottom of the stope, and is extracted at the drawpoints by diesel-powered LHD wheel loaders with a 6.1 cu m bucket capacity. Then the ore is either tipped directly into the passes to feed the crusher or, if the stope is a long way from the crusher, into articulated haulage trucks. After crushing, the ore is sent via a 1.6 km cable belt to the U62 hoisting system, where 36 t skips take it to the surface.
The Enterprise and X41 copper mines are backfilled ........
Crushing and Grinding
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Source:
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Processing
Flow Sheet:
Summary:
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Production
:
Commodity
Units
2022
2021
2020
2019
2018
2017
2016
Copper
kt
......
......
......
......
*
152*
165*
205*
Silver
koz
......
......
......
......
*
......
*
......
*
......
*
Gold
koz
......
*
......
*
......
*
......
*
* Combined production for
Mount Isa Copper Operation
,
Ernest Henry Mine
and
CSA (Cobar) Mine
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Reserves at December 31, 2022:
Mineral Resources are reported inclusive of Mineral Reserves.
Category
Tonnage
Commodity
Grade
Proven
3.9 Mt
Copper
2.08 %
Probable
13.3 Mt
Copper
1.84 %
Proven & Probable
17.2 Mt
Copper
1.84 %
Measured
51 Mt
Copper
2 %
Indicated
106 Mt
Copper
1.56 %
Measured & Indicated
157 Mt
Copper
1.7 %
Inferred
11 Mt
Copper
1.52 %
Heavy Mobile Equipment:
Mine Management:
Job Title
Name
Profile
Ref. Date
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May 4, 2023
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Staff:
Total Workforce
Year
2019
Corporate Filings & Presentations:
Document
Year
...................................
2022
...................................
2022
...................................
2022
Annual Report
2021
Other
2021
Year-end Mineral Reserves
2021
Annual Report
2020
Other
2020
Other
2020
Other
2020
Year-end Mineral Reserves
2020
Annual Report
2019
Year-end Mineral Reserves
2019
Annual Report
2018
Year-end Mineral Reserves
2018
Annual Report
2017
Other
2017
Year-end Mineral Reserves
2017
Annual Report
2016
Corporate Presentation
2016
Year-end Mineral Reserves
2016
Other
2015
Corporate Presentation
2014
Other
2013
Fact Sheet
2009
Other
1995
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News:
News
Date
Queensland Government backs Mount Isa mining jobs
February 19, 2024
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