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Mount Deans pegmatite field, Norseman, Dundas Shire, Western Australia, Australiai
Regional Level Types
Mount Deans pegmatite fieldPegmatite Field
NorsemanTown
Dundas ShireShire
Western AustraliaState
AustraliaCountry

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PhotosMapsSearch
Mindat Locality ID:
239018
Long-form identifier:
mindat:1:2:239018:8
GUID (UUID V4):
2539f094-dcb8-4674-8729-6eb73076cffb


Located nine kilometres south of Norseman, and a couple of kilometres east of the highway. The field was mined for cassiterite between 1965-1967, producing 7.18 tonnes of concentrate. Between 1966 -1985 Norseman Gold Mines NL, and CRA Exploration Pty Ltd, explored the area but did not find cassiterite or tantalum in economic amounts. In 2001 Tantalum Australia Pty Ltd extensively drilled the pegmatite and stated the deposit contained 9.1 million tonnes of ore. They were investigating mining the deposit, however when the writer visited in 2011, no mining had taken place. It is common for exploration companies here in Western Australia to produce positive reports on mineral finds, that never have any likelihood of mining taking place. In 2003, Amit Eliyahu, completed his University of Western Australia thesis on the pegmatite.

The area has a swarm of 71 recognised pegmatites covering 4.5 by 1.5 kilometres trending north north-west. Many of the pegmatites are 500-2000 metres in length and 0.3-7.5 metres thick, with a few 20 metres thick. The pegmatites have an upper portion quartz poor, cleavelandite rich marginal layer, which is where most of the cassiterite and tantalum is found.

There are a large number of trenches, diggings and small open cut pits along the southern side of the access track covering about two kilometres. Two of the larger pits are called Dave's Open Cut (at the far end if travelling from Norseman), and Poldark's Open Cut, about half way along the diggings. Cassiterite, lepidolite and petalite specimens are reasonably common to find, while blue elbaite and pink beryl is more difficult.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

12 valid minerals.

Rock Types Recorded

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

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Albite var. Cleavelandite
Formula: Na(AlSi3O8)
Andalusite
Formula: Al2(SiO4)O
Andalusite var. Viridine
Formula: (Al,Mn3+)2SiO4O
Beryl
Formula: Be3Al2(Si6O18)
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Cassiterite
Formula: SnO2
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Fluorite
Formula: CaF2
'Garnet Group'
Formula: X3Z2(SiO4)3
'Lepidolite'
'Mica Group'
Microcline
Formula: K(AlSi3O8)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Petalite
Formula: LiAl(Si4O10)
Quartz
Formula: SiO2
Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Spodumene
Formula: LiAlSi2O6
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
'Zinnwaldite'

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Cassiterite4.DB.05SnO2
Group 9 - Silicates
Andalusite
var. Viridine
9.AF.10(Al,Mn3+)2SiO4O
9.AF.10Al2(SiO4)O
Beryl9.CJ.05Be3Al2(Si6O18)
Elbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Spodumene9.DA.30LiAlSi2O6
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Petalite9.EF.05LiAl(Si4O10)
Microcline9.FA.30K(AlSi3O8)
Albite
var. Cleavelandite
9.FA.35Na(AlSi3O8)
9.FA.35Na(AlSi3O8)
Unclassified
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
'Zinnwaldite'-
'Mica Group'-
'Lepidolite'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
LiLithium
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Li PetaliteLiAl(Si4O10)
Li SpodumeneLiAlSi2O6
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
B SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O AlbiteNa(AlSi3O8)
O AndalusiteAl2(SiO4)O
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
O BerylBe3Al2(Si6O18)
O CassiteriteSnO2
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O PetaliteLiAl(Si4O10)
O QuartzSiO2
O SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
O SpodumeneLiAlSi2O6
O Tantalite(Mn,Fe)(Ta,Nb)2O6
O Andalusite var. Viridine(Al,Mn3+)2SiO4O
O Albite var. CleavelanditeNa(AlSi3O8)
O Garnet GroupX3Z2(SiO4)3
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
F FluoriteCaF2
NaSodium
Na AlbiteNa(AlSi3O8)
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite var. CleavelanditeNa(AlSi3O8)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AndalusiteAl2(SiO4)O
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Al BerylBe3Al2(Si6O18)
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al PetaliteLiAl(Si4O10)
Al SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Al SpodumeneLiAlSi2O6
Al Andalusite var. Viridine(Al,Mn3+)2SiO4O
Al Albite var. CleavelanditeNa(AlSi3O8)
SiSilicon
Si AlbiteNa(AlSi3O8)
Si AndalusiteAl2(SiO4)O
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Si BerylBe3Al2(Si6O18)
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si PetaliteLiAl(Si4O10)
Si QuartzSiO2
Si SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Si SpodumeneLiAlSi2O6
Si Andalusite var. Viridine(Al,Mn3+)2SiO4O
Si Albite var. CleavelanditeNa(AlSi3O8)
Si Garnet GroupX3Z2(SiO4)3
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca FluoriteCaF2
TiTitanium
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MnManganese
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
Mn Andalusite var. Viridine(Al,Mn3+)2SiO4O
FeIron
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fe SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
NbNiobium
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
SnTin
Sn CassiteriteSnO2
TaTantalum
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6

Geochronology

Mineralization age: Neoarchean : 2620 ± 36 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Precambrian
 Archean
  Neoarchean
ⓘ Albite2620 ± 36 Ma
ⓘ Garnet Group2620 ± 36 Ma

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Localities in this Region

Other Regions, Features and Areas that Intersect

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

 
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