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Ashmara, Bonya, Jervois Station, Central Desert Region, Northern Territory, Australia

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Latitude & Longitude (WGS84): 22° 41' 19'' South , 136° 4' 49'' East
Latitude & Longitude (decimal): -22.6888154284, 136.080302377


One of several scattered copper/scheelite deposits in the Bonya area, about 2 kilometres north of the Bonya Mine. There is a small historic pit at Ashmara, the walls stained with malachite.

Scheelite mineralisation at Ashmara is found on a high hill, and adjacent ridge. The Petra deposit borders the scheelite mineralisation on the ridge. The 300 metre long ridge and hill is a completely folded structure, near prominent exposed amphibolite. Scheelite grades are low, with isolated high grade patches near its periphery, with also some rich patches assocated with quartz blows 30 metres to the north.

Copper is found lower in the stratigraphic sequence at Ashmara, in garnet quartzite, calc-silicate rock, and quartz, while tungsten mineralisation is found higher associated with amphibolite and calc-silicate rock.

The stratigraphy at Ashmara from the surface down is 1)phenocryst aggregate
amphibolite, then 2)thin layer of quartz-epidote-garnet rock, 3) epidotised amphibolite, 4) then 2 again, 5) then 1 again 6) thin layer of biotite schist, 7) epidote calc-silicate, 8) then 2 again.

Mineral List


12 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on mindat.org 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 mindat.org. 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 mindat.org 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.

References

Ransom, D.M. (1978) The Scheelite prospects of the Jervois Range, Bonya Creek and Molyhill areas, Northern Territory.

Zapopan, N.L. (1989) Jervois Range Exploration Licence 6260 (CR 1989/0816).

Rosequartz Mining NL (1991) Jervois Range Exploration Licence 6260 Surrender Report (CR 91/291).

Rox Resources (2012), Numerous Copper Prospects Identified at Bonya (ASX announcement), 11 December 2012



Huckitta 1:250 000 Mineral Deposit Data Sheets, Zia U Bajwah, Northern Territory Geological Survey, 1996.

 
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