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Ajax Gold Mine, Norseman gold mines, Norseman, Dundas Shire, Western Australia, Australiai
Regional Level Types
Ajax Gold MineMine
Norseman gold minesGroup of Mines
Norseman- not defined -
Dundas ShireShire
Western AustraliaState
AustraliaCountry

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Key
Lock Map
Latitude & Longitude (WGS84): 32° 12' 4'' South , 121° 48' 4'' East
Latitude & Longitude (decimal): -32.20120,121.80120
GeoHash:G#: qdq8g9uym
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Norseman982 (2012)2.1km


The former Ajax Gold Mine is south of the Bullen mine. Activity at the site relates to two periods, the 1890's and late 1930's.

Located approximately 3kms east-south-east of Norseman.

Information about the mine was found initially from 1896, stating they had uncovered the cap of the reef. Little other early information is provided, although brief notes are made that it was active across the period to 1899.

A report in 1899 stated the lease was 12 acres, owned by a local syndicate, and there was a main shaft, another shaft to the west down to 30 feet, and two shafts at the north-west corner of the lease at 12 and 16 feet. The oxidised ore went to 35 feet below the surface, then it changed to sulphides, and was highly mineralised.

In 1904, Schertsinger (or Shertzinger depending on the source), Motherston and party sank a shaft to 34 feet on a lode 4 feet wide, showing gold, large amounts of galena, and pyrite. However, later in the year the lease was under exemption.

Then Central Norseman Gold Corporation NL, announced in 1939, the sinking of a new shaft to be called the Ajax, somewhere near the old workings. They intersected the Mararoa Reef at 2,200 feet.

By 1943 it is noted that work at the shaft had stopped. This was further confirmed by later information. Proving what we think as modern problems in fact has always been happening, complaints were made that school aged children were vandalising the abandoned site. Windows had been smashed, electrical switches pulled out, and insulators broken. They had also risked their lives by interfering with the cyanide vats. The headframe was removed to another shaft in 1949.

Central Norseman Gold Corporation has not released much information to the public in recent decades. As a company that has operated at Norseman in one incarnation or another since the 1890's, I guess it feels there is no need. There is some indication the Ajax mine was active in the 1990's and early 2000's. At the time of writing 2015, it is inactive.

The host rock is the Woolyeenyer Formation of tholeiitic basalt flows striking north north-east, and dipping 50 degrees west. In the southern area of the Ajax workings, there is much felsic intrusive bodies, in some areas constituting the dominant rock form. Overlaying this is the Bluebird flow sequence. The lower margin, or first flow is fine grained hornblende-plagioclase-amphibolite, 2 metres thick, grading to coarse grained 5 to 20 metres zone of plagioclase material.

Level 10 of the mine accesses the Mararoa Reef. The host rock here has been metamorphosed to hornblende-plagioclase-amphibolite, and actinolite-chlorite rocks. Intense wall rock alteration, and low grade (0.5 g/t) gold mineralisation was confined to ductile or brittle ductile shear structures. Alteration consists of an outer zone of actinolite-hornblende-plagioclase-epidote, middle zone of hornblende-actinolite-biotite-plagioclase, and inner zone of dominant biotite as well as some quartz-actinolite-plagioclase or calcite. Actinolite shows as fibrous rosettes in quartz veins. The epidote is fine grained.

The Ajax mine accesses three vein systems, which reach widths of up to 10 metres. The Crown Vein strikes for 2.5 kilometres, consisting of 5 major ore bodies hosted by the A, B, and South Crown Faults. The ore bodies plunge south-east.

The second vein system is the Mararoa. This is hosted by the high magnesium Butterfly Dyke, striking 4 kilometres, with 4 major ore bodies, plunging also south-east.

The third is the Norseman vein systems, which runs parallel to the Mararoa, and as with this system, ore bodies are restricted to north north-east striking segments of the veins. The E Fault cuts the Mararoa and Norseman veins at the southern end of the Ajax workings, and is the southern limit for economic gold in these giant vein systems.

Sulphides are locally abundant in the wallrock adjacent to the veins. Pyrrhotite dominates the alteration envelopes, and pyrite dominates the quartz veins. Veins within the shear zone are 90% quartz, but with subordinate calcite, actinolite, pyrite, scheelite and schorl.

At the microscopic level, euhedral pyrite grains within the quartz are fractured and infilled with galena, and gold tellurides hessite, altaite, petzite, sylvanite, and native gold. Galena, sphalerite and gold are localised along the grain boundaries. At the E Fault at the southern end of the workings, an investigation in the stopes found galena, sphalerite, sericite, chalcopyrite, tellurides and gold, intergrown along fractures in veins.

Regions containing this locality

Australia PlatePlate
West Australian Element, Western Australia, AustraliaCraton
Yilgarn Craton, Western Australia, AustraliaCraton
Kambalda Nickel Metallogenic Province, Western Australia, AustraliaGeologic Province

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


19 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Albite-Anorthite Series'
Altaite
Formula: PbTe
'Biotite'
Calcite
Formula: CaCO3
Chalcopyrite
Formula: CuFeS2
'Chlorite Group'
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Galena
Formula: PbS
Gold
Formula: Au
Gypsum
Formula: CaSO4 · 2H2O
Hessite
Formula: Ag2Te
'Hornblende'
Ilmenite
Formula: Fe2+TiO3
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Petzite
Formula: Ag3AuTe2
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe7S8
Quartz
Formula: SiO2
Scheelite
Formula: Ca(WO4)
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sphalerite
Formula: ZnS
Sylvanite
Formula: (Au,Ag)2Te4

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Altaite2.CD.10PbTe
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Hessite2.BA.60Ag2Te
Petzite2.BA.75Ag3AuTe2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Sylvanite2.EA.05(Au,Ag)2Te4
Group 4 - Oxides and Hydroxides
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-
'Chlorite Group'-
'Hornblende'-

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
AmBnXp, with (m+n):p = 2:1
Hessite2.4.2.1Ag2Te
Petzite2.4.3.3Ag3AuTe2
AmXp, with m:p = 1:1
Altaite2.8.1.3PbTe
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Sylvanite2.12.13.3(Au,Ag)2Te4
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Albite-Anorthite Series'-
'Biotite'-
'Chlorite Group'-
'Hornblende'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H GypsumCaSO4 · 2H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C CalciteCaCO3
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O CalciteCaCO3
O ScheeliteCa(WO4)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O IlmeniteFe2+TiO3
O GypsumCaSO4 · 2H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S PyrrhotiteFe7S8
S PyriteFeS2
S GalenaPbS
S SphaleriteZnS
S ChalcopyriteCuFeS2
S GypsumCaSO4 · 2H2O
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca ScheeliteCa(WO4)
Ca GypsumCaSO4 · 2H2O
TiTitanium
Ti IlmeniteFe2+TiO3
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe ChalcopyriteCuFeS2
Fe IlmeniteFe2+TiO3
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
AgSilver
Ag HessiteAg2Te
Ag Sylvanite(Au,Ag)2Te4
Ag PetziteAg3AuTe2
TeTellurium
Te HessiteAg2Te
Te AltaitePbTe
Te Sylvanite(Au,Ag)2Te4
Te PetziteAg3AuTe2
WTungsten
W ScheeliteCa(WO4)
AuGold
Au GoldAu
Au Sylvanite(Au,Ag)2Te4
Au PetziteAg3AuTe2
PbLead
Pb GalenaPbS
Pb AltaitePbTe

Regional Geology

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

Archean
2500 - 4000 Ma



ID: 912215
felsic volcanic and volcaniclastic rocks 74288

Age: Archean (2500 - 4000 Ma)

Description: Quartz-feldspar (meta-) porphyry, porphyritic microgranite; rhyolite, dacite, rhyodacite, andesite; agglomerate, breccia tuff; felsic schist; felsic volcanic and volcaniclastic rocks; dacite and rhyodacite tuff; dacite porphyry;

Comments: igneous volcanic; igneous felsic volcanic; synthesis of multiple published descriptions

Lithology: Igneous volcanic; igneous felsic volcanic

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). [5]

Neoarchean - Mesoarchean
2500 - 3200 Ma



ID: 3190109
Archean volcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Greenstone belt; mafic volcanic 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. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Norseman Times newspaper (1899), Norseman Gold Belt. The Mines Visited. Present Position and Prospects. The Buldania Group. No. XXVII. The Ajax, 21/01/1899
Western Mail newspaper (Perth) (1896), Norseman, 24/07/1896
Kalgoorlie Miner newspaper (1903), Norseman Mining News, 26/11/1903
Kalgoorlie Miner newspaper (1904), Norseman Mining, 02/03/1904
Sunday Times newspaper (Perth) (1951), Norseman Pyrite, 18/05/1951
The West Australian newspaper (Perth) (1949), Mine Headframe, 04/07/1949
Kalgoorlie Miner newspaper (1946), Vandalism at Norseman, 13/03/1946
The Argus newspaper (Melbourne) (1939), Central Norseman, 26/01/1939
Kalgoorlie Miner newspaper (1943), Norseman Items, 02/06/1943
Mueller, A.G. (2011), Petrogenesis of Amphibolite-Biotite-Calcite-Plagioclase Alteration and Laminated Gold-Silver Quartz Veins in Four Archean Shear Zones of the Norseman District Western Australia, Canadian Journal of Earth Sciences, 2011: 29(3) pp388-417
McCuaig, T.C. (1997), The Genesis and Evolution of Lode Gold Mineralization and Mafic Host Lithologies in the Late-Archean Norseman Terrane Yilgarn Block Western Australia, (Thesis), University of Saskkatchewan, Saskatoon, Canada, 1997


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