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New Occidental Mine (New Occidental gold mine; Occidental gold mine; The United mine), Cobar, Robinson Co., New South Wales, Australia

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Latitude & Longitude (WGS84): 31° 32' 30'' South , 145° 51' 44'' East
Latitude & Longitude (decimal): -31.54167,145.86250
GeoHash:G#: r4rsx4jb6
Locality type:Mine
Age:419.2 ± 3.2 to 393.3 ± 1.2 Ma
Geologic Time:Early 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

A former underground copper mine, commenced early 1900s.

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

Commodity List

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

Mineral List

28 valid minerals.

Rock Types Recorded

Note: this is a very new system on 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

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

Early Devonian
393.3 - 419.2 Ma

ID: 916925
Great Cobar Slate

Age: Early Devonian (393.3 - 419.2 Ma)

Stratigraphic Name: Great Cobar Slate

Description: Carbonaceous mudstone with thin interbeds of fine siltstone, rare graded, medium to fine grained quartzose sandstone

Comments: sedimentary siliciclastic; synthesis of multiple published descriptions

Lithology: Sedimentary siliciclastic

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]

Early Silurian - Cambrian
427.4 - 541 Ma

ID: 3185333
Paleozoic sedimentary rocks

Age: Paleozoic (427.4 - 541 Ma)

Comments: Lachlan Fold Belt

Lithology: Sedimentary 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, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on 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 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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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) 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.
Leverett, P., McKinnon, A.R., Sharpe, J.L., Williams, P.A. (2005) Secondary minerals from the central Cobar mines. Australian Journal of Mineralogy, 11, 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.
New South Wales Geological Survey GS1986/169.

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