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New Occidental Mine (New Occidental gold mine; Occidental gold mine; The United mine), Cobar, Robinson Co., New South Wales, Australia i
Regional Level Types
New Occidental Mine (New Occidental gold mine; Occidental gold mine; The United mine) Mine (Planned Future Operation)
Cobar Mining District
Robinson Co. County
New South Wales State
Australia Country

Regional Level Types
New Occidental Mine (New Occidental gold mine; Occidental gold mine; The United mine)	Mine (Planned Future Operation)
Cobar	Mining District
Robinson Co.	County
New South Wales	State
Australia	Country

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View of the Cobar gold mining area, ca. 1901.

New Occidental Mine, Cobar, Robinson Co., New South Wales, Australia

View of the Cobar gold mining area, ca. 1901.

New Occidental Mine, Cobar, Robinson Co., New South Wales, Australia

View of the Cobar gold mining area, ca. 1901.

New Occidental Mine, Cobar, Robinson Co., New South Wales, Australia

Latitude & Longitude (WGS84):

31° 32' 30'' South , 145° 51' 44'' East

Latitude & Longitude (decimal):

-31.54167,145.86250

GRN:

S22E88

Type:

Mine (Planned Future Operation) - last checked 2026

Age:

419.2 ± 3.2 to 393.3 ± 1.2 Ma

Geologic Time:

Early/Lower Devonian

Reference for age:

Gilligan, L.B., Byrnes, J.G. (1995) Metallogenic Study and Mineral Deposit Data Sheets: Cobar Metallogenic Map 1:250 000 (SH/55-14), Geological Survey of New South Wales, Sydney, 240 pages.

Köppen climate type:

BSh : Hot semi-arid (steppe) climate

Nearest Settlements:

Place	Population	Distance
Cobar	4,199 (2017)	5.7km

Mindat Locality ID:

99759

Long-form identifier:

mindat:1:2:99759:6

GUID (UUID V4):

A former underground copper mine, commenced early 1900s.

Please note Cobar is the name of the town and the parish name is also Cobar.

The mine was developed from 1889 and closed 1921. As the New Occidental it re-opened 1933, and became one of the largest gold producers in NSW at this time. It absorbed the New Cobar Mine 1935, and Chesney Mine 1937. New Occidental closed 1952, along with the other two mines. New Occidental again re-opened 2001, and subsequently closed. (2026) A company is looking at treating the tailings (2026).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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

ⓘ Copper

ⓘ Gold

Mineral List

27 valid minerals.

Rock Types Recorded

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Greenschist'

ⓘ Slate

Detailed Mineral List:

ⓘ Arsenopyrite

Formula: FeAsS

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Aurostibite

Formula: AuSb₂

References:

Paar, W. H., Putz, H., Topa, D., Roberts, A. C., Stanley, C. J., Culetto, F. J. (2006) Jonassonite, Au(Bi,Pb)₅S₄, a new mineral species from Nagyborzsony, Hungary. The Canadian Mineralogist, 44 (5) 1127-1136 doi:10.2113/gscanmin.44.5.1127

ⓘ Bismuthinite

Formula: Bi₂S₃

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Bornite

Formula: Cu₅FeS₄

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Calcite

Formula: CaCO₃

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Cassiterite

Formula: SnO₂

References:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ 'Chlorite Group'

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Clausthalite

Formula: PbSe

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Galena

Formula: PbS

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Guanajuatite

Formula: Bi₂Se₃

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Hematite

Formula: Fe₂O₃

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Ikunolite

Formula: Bi₄S₃

References:

ⓘ Jonassonite

Formula: AuBi₅S₄

Description: For details see Stegman & Reynolds (2005).

References:

Stegman, C., Reynolds, I. (2005) Primary mineralisation in Cobar deposits with emphasis on gold deposits of the Cobar goldfield. Australian Journal of Mineralogy, 11, 63-72.

ⓘ Kobellite

Formula: Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Maldonite

Formula: Au₂Bi

References:

ⓘ Marcasite

Formula: FeS₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Muscovite var. Sericite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Native Bismuth

Formula: Bi

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Native Gold

Formula: Au

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Pyrite

Formula: FeS₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Pyrrhotite

Formula: Fe_1-xS

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Quartz

Formula: SiO₂

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Scheelite

Formula: Ca(WO₄)

References:

ⓘ Sphalerite

Formula: ZnS

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ Tetradymite

Formula: Bi₂Te₂S

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S

References:

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Gold	1.AA.05	Au
ⓘ	Native Bismuth	1.CA.05	Bi
Group 2 - Sulphides and Sulfosalts
ⓘ	Maldonite	2.AA.40	Au₂Bi
ⓘ	Bornite	2.BA.15	Cu₅FeS₄
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Clausthalite	2.CD.10	PbSe
ⓘ	Galena	2.CD.10	PbS
ⓘ	Bismuthinite	2.DB.05	Bi₂S₃
ⓘ	Guanajuatite	2.DB.05	Bi₂Se₃
ⓘ	Ikunolite	2.DC.05	Bi₄S₃
ⓘ	Tetradymite	2.DC.05	Bi₂Te₂S
ⓘ	Aurostibite	2.EB.05a	AuSb₂
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Marcasite	2.EB.10a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
ⓘ	'Tetrahedrite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S
ⓘ	Kobellite	2.HB.10a	Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉
ⓘ	Jonassonite	2.LA.65	AuBi₅S₄
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Cassiterite	4.DB.05	SnO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Scheelite	7.GA.05	Ca(WO₄)
Group 9 - Silicates
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Sericite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
Unclassified
ⓘ	'Chlorite Group'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Dolomite	CaMg(CO₃)₂
O	Oxygen
O	ⓘ Calcite	CaCO₃
O	ⓘ Cassiterite	SnO₂
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Scheelite	Ca(WO₄)
O	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Mg	Magnesium
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Al	Aluminium
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
S	Sulfur
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Bismuthinite	Bi₂S₃
S	ⓘ Bornite	Cu₅FeS₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Galena	PbS
S	ⓘ Ikunolite	Bi₄S₃
S	ⓘ Kobellite	Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉
S	ⓘ Marcasite	FeS₂
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
S	ⓘ Sphalerite	ZnS
S	ⓘ Tetradymite	Bi₂Te₂S
S	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
S	ⓘ Jonassonite	AuBi₅S₄
K	Potassium
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Scheelite	Ca(WO₄)
Fe	Iron
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Bornite	Cu₅FeS₄
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Marcasite	FeS₂
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Cu	Copper
Cu	ⓘ Bornite	Cu₅FeS₄
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Kobellite	Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉
Cu	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
Se	Selenium
Se	ⓘ Clausthalite	PbSe
Se	ⓘ Guanajuatite	Bi₂Se₃
Sn	Tin
Sn	ⓘ Cassiterite	SnO₂
Sb	Antimony
Sb	ⓘ Aurostibite	AuSb₂
Sb	ⓘ Kobellite	Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉
Sb	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Te	Tellurium
Te	ⓘ Tetradymite	Bi₂Te₂S
W	Tungsten
W	ⓘ Scheelite	Ca(WO₄)
Au	Gold
Au	ⓘ Aurostibite	AuSb₂
Au	ⓘ Native Gold	Au
Au	ⓘ Maldonite	Au₂Bi
Au	ⓘ Jonassonite	AuBi₅S₄
Pb	Lead
Pb	ⓘ Clausthalite	PbSe
Pb	ⓘ Galena	PbS
Pb	ⓘ Kobellite	Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉
Bi	Bismuth
Bi	ⓘ Native Bismuth	Bi
Bi	ⓘ Bismuthinite	Bi₂S₃
Bi	ⓘ Guanajuatite	Bi₂Se₃
Bi	ⓘ Ikunolite	Bi₄S₃
Bi	ⓘ Kobellite	Pb₂₂Cu₄(Bi,Sb)₃₀S₆₉
Bi	ⓘ Maldonite	Au₂Bi
Bi	ⓘ Tetradymite	Bi₂Te₂S
Bi	ⓘ Jonassonite	AuBi₅S₄

Other Regions, Features and Areas containing this locality

Australia

Lachlan OrogenOrogen
- Central NSW - Omeo ProvinceGeologic Province
- Cobar BasinBasin

Australian PlateTectonic Plate

Lachlan Fold Belt
- Wagga-Omeo Metamorphic ComplexOrogenic Belt

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

New South Wales Geological Survey GS1986/169.

Andrews, E.C. (1913) Report on the Cobar Copper and Gold-field. Part I. New South Wales Department of Mines, Geological Survey, Mineral Resources No.17, 207 pages.

Hart, J.G. (1936) Treatment of New Occidental residues. Joint Investigations of the Council for Scientific and Industrial Research and the university of Melbourne Metallurgical Laboratory, Ore Dressing Investigation 15, 5pp (unpublished).

Lloyd, A.C. (1950) New Occidental gold mine, Cobar. Department of Mines New South Wales Geological Reports for 1939-1945, 15-16.

Sullivan, C.J. (1951) Geology of the New Occidental, New Cobar and Chesney mines, Cobar, New South Wales. Bureau of Mineral Resources, Australia, Report 6, 62 pages.

Mulholland, C. St J., Rayner, E.O. (1961) The gold-copper deposits of Cobar, New South Wales. Central section (Great Cobar to New Occidental), Department of Mines New South Wales, Technical Report 6 (for 1958), pp 23-47.

Russell, R.T., Lewis, B.R. (1965) Gold and copper deposits of the Cobar district. In Geology of Australian Ore Deposits, 8th ed. Commonwealth Mining and Metallurgical Congress, Australia and New Zealand, Publication 1, pp.411-419.

Robertson, I.G. (1974) The environmental features and petrogenesis of the mineral zones of Cobar, New South Wales. Ph D thesis, University of New England, Armidale (unpublished).

Brooke, W.J.L. (1975) Cobar mining field. In( Knight, C.L. Ed) Economic Geology of Australia and Papua New Guinea, 1. Metals. Australian Institute of Mining and Metallurgy, Monograph 5, 683-694.

Gilligan, L.B., Byrnes, J.G. (1995) Cobar Metallogenic Map 1:250 000. Metallogenic Study and Mineral Deposit Data Sheets SH/55-14. Geological Survey of New South Wales

Leverett, P., McKinnon, A.R., Sharpe, J.L., Williams, P.A. (2005) Secondary minerals from the central Cobar mines. Australian Journal of Mineralogy 11(2), 75-82.

Stegman, C., Reynolds, I. (2005) Primary mineralisation in Cobar deposits with emphasis on gold deposits of the Cobar goldfield. Australian Journal of Mineralogy, 11, 63-72.

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