|Latitude & Longitude (WGS84):||31° 11' 1'' South , 121° 38' 58'' East|
|Latitude & Longitude (decimal):||-31.18365,121.64971|
|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 ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
18 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
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
2500 - 4000 Ma
|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). 
|Neoarchean - Mesoarchean|
2500 - 3200 Ma
|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.