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Neptune gold prospect, St. Ives gold camp, Kambalda, Coolgardie Shire, Western Australia, Australiai
Regional Level Types
Neptune gold prospectProspect
St. Ives gold camp- not defined -
KambaldaTown
Coolgardie ShireShire
Western AustraliaState
AustraliaCountry

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Latitude & Longitude (WGS84):
31° 18' 17'' South , 121° 43' 10'' East
Latitude & Longitude (decimal):
-31.30466,121.71931
GeoHash:
G#: qdqtcv1m1
GRN:
S21E75
Type:
Prospect
KΓΆppen climate type:
BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Stoneville2,841 (2016)48.9km
Mindat Locality ID:
266294
Long-form identifier:
mindat:1:2:266294:0
GUID (UUID V4):
e82ec42f-4d56-4439-9834-32910ce55c4b


The Neptune prospect is under the Lake Lefroy salt-pan bed. It is between Delta Island and the southern shoreline containing the Lefroy Mill. The deposit is immediately west of the causeway.
Also known as the 'Greater Neptune Area'. It includes the Redback and Neptune projects. Only drilling has occurred so far.

The prospects are covered by 10 metre thick lake sediment which thickens to the north and west. The geology is described as similar to that for the Revenge and Victory-Defiance mines listed elsewhere for St Ives.

Gold is hosted in Kapai Slate and Defiance Dolerite, along with several suites of felsic and intermediate intrusive rocks.

The shear zones here are discrete structures, north north-west trending and dipping moderately east. They have a barren bucky quartz core, with a mineralised halo of albite-biotite-pyrite alteration.

High gold values are found in the main EZ Shear in albite-biotite-pyrite mylonite, with a quartz core. Anomalous gold is found in the overlying Tertiary sediments, residual oxides, and saprolite. There is an extensive supergene blanket which overlies the shears, and follows the shear strike.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


4 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 1 - Elements
β“˜Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
β“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 9 - Silicates
β“˜Albite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ QuartzSiO2
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ QuartzSiO2
SSulfur
Sβ“˜ PyriteFeS2
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ PyriteFeS2
AuGold
Auβ“˜ GoldAu

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

Steffen Robertson and Kirsten (Australasia) Pty Ltd (2004), An Independent Technical Report on the St Ives Gold Mine Western Australia, Goldfields Ltd and Iamgold Corporation, 01/07/2004
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