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George Fisher Mine, Hilton district, Mount Isa City Shire, Queensland, Australia

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Latitude & Longitude (WGS84): 20° 34' 4'' South , 139° 28' 33'' East
Latitude & Longitude (decimal): -20.5677777778, 139.475833333

A large operating, underground silver-lead-zinc mine located in NW Queensland, closely related to the Mt Isa mines 20km to the south, but the mineralised section is only one-third the thickness of the Mount Isa ore zone, extending from 300m to 1,000m depth for 6.5km. It is more folded and more interrupted by faults and dykes. Ore zones are from 3m to 25m thick. 11 orebodies have been assessed, the two to be mined containing 24Mt and providing a ten-year mine life at a production rate of 2.5Mt/y.

As of mid-2005, Xstrata stated the reserves as: George Fisher South – 10Mt grading 7.8% zinc, 5.6% lead and 130g/t silver. George Fisher North – 11.4Mt grading 8.8% zinc, 4.7% lead and 92g/t silver. Resources at the South orebody were 22Mt at 8.9% zinc, 6.5% lead and 150g/t silver, while those at George Fisher North stood at 14Mt at 10% zinc, 5.15% lead and 100g/t silver.

Mineral List

15 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

1600 - 1800 Ma
Mount Isa Group

Age: Statherian (1600 - 1800 Ma)

Stratigraphic Name: Mount Isa Group

Description: Siltstone, shale, commonly dolomite, minor sandstone, conglomerate.

Comments: argillaceous detrital sediment; sedimentary carbonate; synthesis of multiple published descriptions

Lithology: Argillaceous detrital sediment; sedimentary carbonate

Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia). [5]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Chapman, L. H. (1999). Geology and genesis of the George Fisher Zn-Pb-Ag deposit, Mount Isa, Australia: Unpublished Ph. D (Doctoral dissertation, thesis, Townsville, Queensland, James Cook University).

Chapman, L. H. (2004). Geology and mineralization styles of the George Fisher Zn-Pb-Ag deposit, Mount Isa, Australia. Economic Geology, 99(2), 233-255.

Large, RR and Bull, SW and McGoldrick, PJ and Walters, SG (2005): Stratiform and Strata-Bound Zn-Pb-Ag Deposits in Proterozoic Sedimentary Basins, Northern Australia. Economic Geology, 100th Anniversary Volume, 931-963.

External Links

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