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Sally Malay Ni Mine (Savannah), Mabel Downs Station, Halls Creek Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 17° 21' 10'' South , 128° 1' 20'' East
Latitude & Longitude (decimal): -17.35278,128.02222
GeoHash:G#: qugj31nbt
Locality type:Mine
Köppen climate type:BSh : Hot semi-arid (steppe) climate


Located 3.7 km north of Dave Hill.

120 kilometres north of Halls Creek. The mine can be seen to the west from the Great Northern Highway. The prospect was purchased from Normandy Mining in 2000, by private company Mitchell River Group. After exploration of the site, they formed a publicly listed company called Sally Malay Mining, which developed an open pit and underground decline.

The mine opened for production in 2004.

The mine is a nickel deposit hosted by an extensive suite of mafic and ultamafic intrusives within the late Proterozoic Halls Creek Mobile Zone. The intrusives are rythmically layered olivine gabbro, trocolite, norite, with massive nickel sulphides in the basal zones. This ore is dominated by pyrrhotite, chalcopyrite and pentlandite as two steeply dipping lenses to the north, 3-40 metres thick at the bottom of the norite zone.

The footwall lens is at the base of the norite in contact with the footwall gneiss, however the hanging wall is up to 15 metres higher, although they merge to the west. There is also significant stringer and disseminated sulphide mineralisation between the lenses and into the hanging wall. The orebody strikes east-west, and showed originally as a well defined gossan 270 metres long on the surface. It terminates to the west by a fault and pinches out to the east. There is also a major fault 500 metres below the surface which dislocates the upper and lower orebodies by 150 metres.

A nearby satellite open pit called Copernicus is on care and maintenance.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


10 valid minerals.

Rock Types Recorded

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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 Macrostrat.org

Statherian
1600 - 1800 Ma



ID: 3184810
Paleoproterozoic intrusive rocks

Age: Statherian (1600 - 1800 Ma)

Comments: Halls Creek Orogen

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Orosirian
1800 - 2050 Ma



ID: 867181
Tickalara Metamorphics - mafic granulites

Age: Orosirian (1800 - 2050 Ma)

Stratigraphic Name: Tickalara Metamorphics

Description: Metamorphosed diorite and amphibolite

Comments: igneous intermediate intrusive; meta-igneous mafic; synthesis of multiple published descriptions

Lithology: Igneous intermediate intrusive; meta-igneous mafic

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License



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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Marston, R.J. (1984) Nickel Mineralization in Western Australia. Mineral Resources Bulletin 14, Geological Survey of Western Australia, 291p. 

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