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Ken Shoot, Kambalda Nickel mines, Kambalda, Coolgardie Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 31° 11' 1'' South , 121° 38' 58'' East
Latitude & Longitude (decimal): -31.18365,121.64971
GeoHash:G#: qdqw85nw5
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Located 2.5 kilometres north-west of the Fisher shoot. It is contained in the McMahon Complex, including the Gellaty, Gordon, Wroth, and Loreto shoots. Ken showed no outcrop. Discovered late 1971. Mined via 900 metre drive from the McMahon decline, ore production from late 1972.

The komatiite flow is 50 metres thick, increasing to 100 metres thick on the western margin. Footwall is dark green grey or pale grey metabasalt as a complex pile of small basalt flows, ultramafics, and metasediment. Pillowed zones are common in the upper levels, with massive Fe-Ni-Cu sulphides. The Footwall is disrupted by low and high angle reverse faults, most dipping west.

The ultramafic host is talc-magnesite, and chlorite rock. Basal peridotitic, upper plagioclase. The Ken shoot is bounded by faults, and a porphyry intrusion to the south, and metasediment to the north.

The deposit is 400 metres long, trending north north-west, dipping 25-60 degrees north north-west.

Hanging Wall ore only accounts for 6% of the ore volume at the deposit. Contact ore is found in 13 sub-shoots, as massive, disseminated, and minor matrix ore. The largest sub-shoots are called Ken Main, and Ken Lower Trough, with massive ore in both as short lenses, and greater amounts of lower grade disseminated ore.

Massive ore is fine grained pyrite lenses in depressions up to 160 metres long, up to 2 metres thick, with disseminated ore also up to 2 metres thick. Primary ore is pyrrhotite, pentlandite, pyrite, chalcopyrite, with minor magnetite, chromite and gersdorffite. Pentlandite is partly replaced by violarite in the contact ore in the upper levels. Pyrite is locally dominant is some areas. Massive ore grades at 8-19% Ni.



Commodity List

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


Mineral List


18 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

Archean
2500 - 4000 Ma



ID: 867366
mafic extrusive rocks 74248

Age: Archean (2500 - 4000 Ma)

Description: Basalt, high-Mg basalt, minor mafic intrusive rocks; some andesite; agglomerate; mafic schist; amphibolite; dolerite; komatiitic basalt; carbonated basalt; basaltic andesite; mafic rock interleaved with minor granitic rock

Comments: igneous mafic volcanic; igneous mafic intrusive; synthesis of multiple published descriptions

Lithology: Igneous mafic volcanic; igneous mafic intrusive

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]

Neoarchean - Mesoarchean
2500 - 3200 Ma



ID: 3189181
Archean sedimentary rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Sedimentary 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]

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

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Marston, R.J. (1984) Nickel Mineralization in Western Australia. Mineral Resources Bulletin 14, Geological Survey of Western Australia, 291p. 

 
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