George Fisher Mine, Hilton district, Mount Isa City Shire, Queensland, Australia
|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.
15 valid minerals.
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 Macrostrat.org
1600 - 1800 Ma
|Mount Isa Group|
Age: Statherian (1600 - 1800 Ma)
Stratigraphic Name: Mount Isa Group
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). 
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.