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Otter Shoot Nickel Mine, Juan complex, Kambalda Nickel mines, Kambalda, Coolgardie Shire, Western Australia, Australiai
Regional Level Types
Otter Shoot Nickel MineMine
Juan complexComplex
Kambalda Nickel minesGroup of Mines
Kambalda- not defined -
Coolgardie ShireShire
Western AustraliaState
AustraliaCountry

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Key
Latitude & Longitude (WGS84):
31° 10' 5'' South , 121° 39' 11'' East
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Stoneville2,841 (2016)35.2km
Boulder5,178 (2017)45.6km
Williamstown161 (2018)49.2km
Kalgoorlie31,107 (2014)49.9km


[Possibly identical to Otter-Juan mine.]
Otter shoot is southwest of the Juan shoots


Rare nickel secondary species from Kambalda invariably come from the Otter Shoot Mine, which was its name when operated by Western Mining Corporation. It is now named the Otter Juan Mine. Specimens appear to have been extracted from the oxidised zone in the early 1980's when an interest was taken in the rare species it contains, in particular Kambaldaite.

It is one of the older nickel mines in the area, operated by Western Mining Corporation between 1968 to 1999. Between 1998 to 2001, Western Mining exited the nickel mines around Kambalda. The Otter Shoot Mine was purchased by GBF Mining Pty Ltd in 2001, and later that year re-opened the mine. In 2007, Mincor Resources purchased the mine, and this company now owns and operates all the nickel mines on the Kambalda Dome. The ore is processed in BHP Billiton's nickel concentrator at Kambalda. Mincor sells the nickel concentrate also to this company as part of its processing deal.

The Otter Juan Complex has over 60 ore shoots on the northern boundary of the Kambalda Dome. It is considered the largest and richest deposit in the Dome. As is typical of all the deposits, the shoots lie on the Lunnon Basalt. The main ore shoot is called Edwards. This layer of massive ore contains 80-100% sulphides at 10-17% Ni to 0.8m above the basalt. Above this is a 1.2m thick layer of matrix ore at 40-80% sulphide and 2.5-7% Ni. In turn above this is disseminated ore 10-40% sulphides and 0.5-2.5 Ni. The hanging wall is talc-magnetite-chlorite ultramafic rock.

Interest in the rare secondary nickel species of the oxidised zone, started when R Harrison collected some material from the Number 1 ventilation shaft at the mine. This was shown to Western Australian collector and specimen miner, David Vaughan, who approached the CSIRO. The appropriately named Ernest Nickel identified the new species Kambaldaite from this material. The species is unique in composition, structure and has no close relatives.

The primary and supergene sulphides are pentlandite-pyrrhotite-pyrite, and pentlandite-millerite-pyrite, altered in the supergene zone to violarite and pyrite. This decomposes further by oxidation to a goethitic residue in which most of the secondary nickel species are deposited. The material is found around 20m below the surface, at the base of the oxidised zone, in a supergene weathering area. Kambaldaite,gaspeite,reevesite and some aragonite are found on fracture surfaces in the goethite. Important elements in the development of these rare species in this zone is the dissolution of violarite, high sodium content from saline seepage from nearby salt lakes, and the dissolution of carbonates from the wall rock and ore.

Most of the nickel deposits listed under Kambalda on Mindat occur within a few kilometres of each other, directly north of the East Kambalda townsite. Otter Shoot/Juan is the most northerly and the shoots of this complex in total trend north-west to south-east over a length of about 4 kilometres. Measured from the centre of the Otter Shoots are Durkin 1 kilometre south-east, Gellaty 1 kilometre south-west, McMahons 2 kilometres south-west, Ken 3 kilometres south-west, Coronet/McCloy 2 kilometres south, Long and Victor 5 Kilometres south-east and Lunnon 8 kilometres south south-east.

Otter Shoot is the type locality for hydrohonessite. This bright yellow species was found in 1978 in the wall of stope 103, 43 metres below the surface. The amount collected was too small for it to be identified, until several years later when more was found on the mine's dump. At Otter Shoot it forms surface encrustations of tiny hexagonal crystals on botryoidal quartz and magnesite in a fracture in supergene Ni-Fe sulphides violarite and pyrite. The species here was found as tiny hexagonal flakes and to be intimately associated with silica, and was disseminated in a mass of the secondary minerals gaspeite, pecoraite, and some coarse gypsum crystals and minor goethite. Better specimens of hydrohonessite were to be later uncovered at 132 North mine near Widgiemooltha.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Commodity List

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


Mineral List


20 valid minerals. 2 (TL) - type locality of valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: Marston, R.J. (1984) Nickel Mineralization in Western Australia. Mineral Resources Bulletin 14, Geological Survey of Western Australia, 291p. 
Aragonite
Formula: CaCO3
Reference: AM 70 (1985), 419
Baryte
Formula: BaSO4
Reference: Econ Geol (1986) 81:1218-1225
Gaspéite
Formula: NiCO3
Habit: veins to 8cm thick
Colour: apple green
Reference: AM 70 (1985), 419; Mineralogical Magazine 1981 44 : 333-337.; Fetherston, J. M., Stocklmayer, S. M. and Stocklmayer, V. C. (2013): Gemstones of Western Australia. Mineral Resources Bulletin 25, Geological Survey of Western Australia, Perth, Australia, 306 pp.
Glaukosphaerite
Formula: (Cu,Ni)2(CO3)(OH)2
Reference: Mineralogical Magazine 1974 39 : 737-743
Goethite
Formula: α-Fe3+O(OH)
Reference: AM 70 (1985), 419; Mineralogical Magazine 1981 44 : 333-337.
Gold
Formula: Au
Reference: Econ Geol (1986) 81:1218-1225
Gypsum
Formula: CaSO4 · 2H2O
Reference: Mineralogical Magazine 1981 44 : 333-337.
Hydrohonessite (TL)
Formula: (Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2O
Type Locality:
Reference: Mineralogical Magazine 1981 44 : 333-337.
Kambaldaite (TL)
Formula: NaNi4(CO3)3(OH)3 · 3H2O
Type Locality:
Reference: AM 70 (1985), 419
Magnesite
Formula: MgCO3
Reference: Mineralogical Magazine 1981 44 : 333-337.
Millerite
Formula: NiS
Reference: In the collection of Brent Thorne
Népouite
Formula: (Ni,Mg)3(Si2O5)(OH)4
Reference: Eardleyite as a Product of the Supergene Alteration of Nickel Sulphides in Western Australia; E Nickel, C Davis, M Bussell, P Bridge, J Dunn, R Macdonald; American Mineralogist, Vol 62, pp 449-457, 1977
Pecoraite
Formula: Ni3(Si2O5)(OH)4
Reference: Mineralogical Magazine 1981 44 : 333-337.
Polydymite
Formula: Ni2+Ni3+2S4
Reference: In the collection of Brent Thorne
Pyrite
Formula: FeS2
Reference: AM 70 (1985), 419
Reevesite
Formula: Ni6Fe3+2(OH)16(CO3) · 4H2O
Reference: AM 70 (1985), 419
Scheelite
Formula: Ca(WO4)
Reference: Econ Geol (1986) 81:1218-1225
Takovite
Formula: Ni6Al2(OH)16[CO3] · 4H2O
Reference: Eardleyite as a Product of the Supergene Alteration of Nickel Sulphides in Western Australia; E Nickel, C Davis, M Bussell, P Bridge, J Dunn, R Macdonald; American Mineralogist, Vol 62, pp 449-457, 1977
Violarite
Formula: Fe2+Ni3+2S4
Reference: AM 70 (1985), 419; Mineralogical Magazine 1981 44 : 333-337.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Millerite2.CC.20NiS
Polydymite2.DA.05Ni2+Ni3+2S4
Pyrite2.EB.05aFeS2
Violarite2.DA.05Fe2+Ni3+2S4
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Gaspéite5.AB.05NiCO3
Glaukosphaerite5.BA.10(Cu,Ni)2(CO3)(OH)2
Kambaldaite (TL)5.DA.20NaNi4(CO3)3(OH)3 · 3H2O
Magnesite5.AB.05MgCO3
Reevesite5.DA.50Ni6Fe3+2(OH)16(CO3) · 4H2O
Takovite5.DA.50Ni6Al2(OH)16[CO3] · 4H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Hydrohonessite (TL)7.DD.35(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2O
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Antigorite9.ED.15Mg3(Si2O5)(OH)4
Népouite9.ED.15(Ni,Mg)3(Si2O5)(OH)4
Pecoraite9.ED.15Ni3(Si2O5)(OH)4

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Millerite2.8.16.1NiS
AmBnXp, with (m+n):p = 3:4
Polydymite2.10.1.7Ni2+Ni3+2S4
Violarite2.10.1.8Fe2+Ni3+2S4
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Gaspéite14.1.1.8NiCO3
Magnesite14.1.1.2MgCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Glaukosphaerite16a.3.1.3(Cu,Ni)2(CO3)(OH)2
Group 16b - HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
Reevesite16b.6.3.1Ni6Fe3+2(OH)16(CO3) · 4H2O
Takovite16b.6.3.2Ni6Al2(OH)16[CO3] · 4H2O
Kambaldaite (TL)16b.7.12.1NaNi4(CO3)3(OH)3 · 3H2O
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Hydrohonessite (TL)31.10.7.1(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Antigorite71.1.2a.1Mg3(Si2O5)(OH)4
Népouite71.1.2b.3(Ni,Mg)3(Si2O5)(OH)4
Pecoraite71.1.2d.4Ni3(Si2O5)(OH)4
Unclassified Minerals, Mixtures, etc.
Aragonite-CaCO3

List of minerals for each chemical element

HHydrogen
H Hydrohonessite(Ni1-xFex3+)(OH)2(SO4)x/2 · nH2O
H KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
H Glaukosphaerite(Cu,Ni)2(CO3)(OH)2
H Goethiteα-Fe3+O(OH)
H ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
H PecoraiteNi3(Si2O5)(OH)4
H GypsumCaSO4 · 2H2O
H Népouite(Ni,Mg)3(Si2O5)(OH)4
H TakoviteNi6Al2(OH)16[CO3] · 4H2O
H AntigoriteMg3(Si2O5)(OH)4
CCarbon
C KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
C Glaukosphaerite(Cu,Ni)2(CO3)(OH)2
C ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
C GaspéiteNiCO3
C AragoniteCaCO3
C MagnesiteMgCO3
C TakoviteNi6Al2(OH)16[CO3] · 4H2O
OOxygen
O Hydrohonessite(Ni1-xFex3+)(OH)2(SO4)x/2 · nH2O
O KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
O Glaukosphaerite(Cu,Ni)2(CO3)(OH)2
O Goethiteα-Fe3+O(OH)
O ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
O GaspéiteNiCO3
O AragoniteCaCO3
O MagnesiteMgCO3
O PecoraiteNi3(Si2O5)(OH)4
O GypsumCaSO4 · 2H2O
O ScheeliteCa(WO4)
O BaryteBaSO4
O Népouite(Ni,Mg)3(Si2O5)(OH)4
O TakoviteNi6Al2(OH)16[CO3] · 4H2O
O AntigoriteMg3(Si2O5)(OH)4
NaSodium
Na KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
MgMagnesium
Mg MagnesiteMgCO3
Mg Népouite(Ni,Mg)3(Si2O5)(OH)4
Mg AntigoriteMg3(Si2O5)(OH)4
AlAluminium
Al TakoviteNi6Al2(OH)16[CO3] · 4H2O
SiSilicon
Si PecoraiteNi3(Si2O5)(OH)4
Si Népouite(Ni,Mg)3(Si2O5)(OH)4
Si AntigoriteMg3(Si2O5)(OH)4
SSulfur
S Hydrohonessite(Ni1-xFex3+)(OH)2(SO4)x/2 · nH2O
S PyriteFeS2
S ViolariteFe2+Ni23+S4
S GypsumCaSO4 · 2H2O
S BaryteBaSO4
S PolydymiteNi2+Ni23+S4
S MilleriteNiS
CaCalcium
Ca AragoniteCaCO3
Ca GypsumCaSO4 · 2H2O
Ca ScheeliteCa(WO4)
FeIron
Fe Hydrohonessite(Ni1-xFex3+)(OH)2(SO4)x/2 · nH2O
Fe Goethiteα-Fe3+O(OH)
Fe ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
Fe PyriteFeS2
Fe ViolariteFe2+Ni23+S4
NiNickel
Ni Hydrohonessite(Ni1-xFex3+)(OH)2(SO4)x/2 · nH2O
Ni KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
Ni Glaukosphaerite(Cu,Ni)2(CO3)(OH)2
Ni ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
Ni GaspéiteNiCO3
Ni ViolariteFe2+Ni23+S4
Ni PecoraiteNi3(Si2O5)(OH)4
Ni PolydymiteNi2+Ni23+S4
Ni MilleriteNiS
Ni Népouite(Ni,Mg)3(Si2O5)(OH)4
Ni TakoviteNi6Al2(OH)16[CO3] · 4H2O
CuCopper
Cu Glaukosphaerite(Cu,Ni)2(CO3)(OH)2
BaBarium
Ba BaryteBaSO4
WTungsten
W ScheeliteCa(WO4)
AuGold
Au GoldAu

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Nickel, E.H., Robinson, B.W. (1985): Kambaldaite a New Hydrated Ni Na Carbonate Mineral from Kambalda Western Australia, American Mineralogist (1985):70:419-422
Nickel, E.H., Wildman, J.E.(1981): Hydrohonessite a New Hydrated Ni-Fe Hydroxy Sulphate Mineral- its relationship to honessite, carrboydite and minerals of the pyroaurite group, Mineralogical Magazine (Sept 1981):44:333-337

External Links

http://www.curleymike.com.au/pdf/paper2.pdf A Step Back in Time to Hand Mining for Profitability, Mike Turner, Peter Teasdale, Tim Green, unpublished. http://wwwmincor.com.au/kambalda_nickel_operation/current_mining_operations_nickel_projects.phtm

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.
 
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