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Last Hope Mine (Last Hope Mica Mine), Coggan Bore, Ambalindum Station, Harts Range (Harts Ranges; Hartz Range; Hartz Ranges), Central Desert Region, Northern Territory, Australia

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Latitude & Longitude (WGS84): 23° 12' 9'' South , 135° 21' 42'' East
Latitude & Longitude (decimal): -23.2025, 135.361944444

Pegmatite mine. Located approximately 3 kilometres north-east of Coggan Bore. Head east a short distance down the fence line from Coggan Bore, and at the end of this on a track north-east. It would appear this small abandoned mica mine has a limited footprint. PNC Exploration in 1994 could not locate the mine, and they comment the mine could be mis-placed on maps. According to production records it was only operational for two years; 1947 1743 lbs, and 1948 1215 lbs of mica.

The mine was owned and operated by Joe Dalmaso. The mine is on the south slope of a steep ridge, once consisting of two shafts down to 50 feet deep, three short tunnels, and a few small open cuts. The northern hanging wall of the pegmatite is covered by thin mica sheets. The pegmatite dips steeply north.

Noted for small concentrations of disseminated coarsely crystalline monazite, and the ill-defined mineral stated as betafite at the location. Monazite is pale yellow to dark red-brown, while the betafite is greenish black or dark brown, altering to yellow when exposed to weathering.

Mineral List

2 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

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.


Daly, J., Dyson, D.F. (1956) Geophysical Investigations for Radioactivity in the Harts Range Area, Northern Territory, Department of National development/Bureau of Mineral Resources Geology and Geophysics, Commonwealth of Australia, Report No.32.

Shaw, R.D. and Freeman, M.J. (1985) Illogwa Creek, Northern Territory (Second Edition) 1:250 000 geological map series, explanatory notes, SF53-14. Bureau of Mineral Resources, Canberra, Australia.

Centralian Advocate newspaper (Alice Springs) (1948) Harts Range District Notes, 28/05/1948.

Kruttschnitt, J., Moss, F.A., Carter, S., Haney, T. (1951) Report on the Harts Range Mica Field, Mount Isa Mines Ltd, April 1951.

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