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Harmony Ni Mine, Leinster, Leonora Shire, Western Australia, Australiai
Regional Level Types
Harmony Ni MineMine
Leinster- not defined -
Leonora ShireShire
Western AustraliaState
AustraliaCountry

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Latitude & Longitude (WGS84):
27° 46' 34'' South , 120° 41' 23'' East
Latitude & Longitude (decimal):
-27.77621,120.68995
GeoHash:
G#: qejcfr7xz
GRN:
S19E76
Type:
Mine
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
190241
Long-form identifier:
mindat:1:2:190241:2
GUID (UUID V4):
0


A komatiite-associated nickel sulphide deposit.

Harmony is 2 kilometres north north-west of the Rocky's Reward Mine, and was discovered in 1997, with mining production starting in 2000 as an open pit. The mine is owned and operated by BHP Billiton as Nickelwest. The pit is 1.5 kiometres long, by 400 metres wide by 180 metres deep. Major drainage channels had to be built as the deposit is in the middle of a creek system prone to floods. Also 70 million tonnes of overburden had to be cleared.

The ore-body trends north north-west, is overturned, dips 30-80 degrees west, and has been metamorphosed to middle amphibolite facies. The footwall is volcano-sedimentary rocks and rhyodacite volcanics and volcaniclastic rocks, overlain by komatiite hosting the nickel. Pyrite rich pelitic units are found in the footwall. The hanging wall is reworked sedimentary and volcaniclastic rocks interlayered with at least two barren spinifex textured komatiite units. The komatiite is thickest in the central portion of the deposit and thins north and south.

Massive (85% of the ore)and disseminated (15% of the ore) sulphides are concentrated near the western sheared footwall, and to a lesser extent elsewhere in the komatiite at structural locations. The massive sulphides is 80% pyrrhotite and 7% pentlandite, with lesser pyrite, violarite, chalcopyrite, and magnetite, with Ni grades 3-8%.

Less deformed sulphides occur along the footwall of the host komatiite, containing 0.1-1 cm pentlandite and magnetite surrounded by pyrrhotite. The more deformed sulphides are composed of banded pyrrhotite and pentlandite parrallel to the elongation of the mineral lenses, enclosing angular clasts of the wall rocks. Disseminated sulphides to the east of the massive sulphides in the hanging wall, include pyrrhotite, pentlandite, pyrite and violarite.

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


6 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘViolarite2.DA.05Fe2+Ni3+2S4
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4

List of minerals for each chemical element

OOxygen
Oⓘ MagnetiteFe2+Fe23+O4
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ ViolariteFe2+Ni23+S4
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ ViolariteFe2+Ni23+S4
NiNickel
Niⓘ Pentlandite(NixFey)Σ9S8
Niⓘ ViolariteFe2+Ni23+S4
CuCopper
Cuⓘ ChalcopyriteCuFeS2

Other Regions, Features and Areas containing this locality

Australia
Australian PlateTectonic Plate

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

The Leinster Listener (2000):(17 Apr 2000):12(5):
www.portergeo.com.au (2004) http://www.portergeo.com.au/database/mineinfo.asp?mineid=mn160
Duuring, P., Bleeker, W., Beresford, S. W. (2007) Structural Modification of the Komatiite-Associated Harmony Nickel Sulfide Deposit, Leinster, Western Australia. Economic Geology, 102 (2) 277-297 doi:10.2113/gsecongeo.102.2.277
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