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Block 45 Gold Mine, Golden Mile Mines, Kalgoorlie-Boulder, Kalgoorlie-Boulder Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 30° 46' 44'' South , 121° 29' 53'' East
Latitude & Longitude (decimal): -30.77889,121.49833
GeoHash:G#: qdw2uub7u
Locality type:Mine
Köppen climate type:BSh : Hot semi-arid (steppe) climate

The Block 45's main claim to fame is that it was the first discovery of telluride on the Golden Mile. Telluride is rare in Australia, and is phenomenally rich in gold. The Golden Mile turned out to have telluride in spades.

The strange stone had puzzled management for a week. Assayer and mining engineer, A.J. Holroyd, was called in and when tested it turned out to be the telluride sylvanite. Several other telluride species were subsequently identified. Every mine manager, assayer, and analytical chemist on the Golden Mile descended on the mine. Simpson credits Richard Eades as the first discoverer of telluride on the Golden Mile, with Eric Huntley being supplied and testing the material. Holroyd's confirmation was shortly after.

Mining reporters were singularly unimpressed used to showy specimen stone being displayed to them. Dull, looks like galena, has dirty oxidised mustard gold with it, were some of the disparaging comments. Three lodes traverse the property called Brown Hill, Kelly's and Mount Morgan. Telluride had initially been found at the 100 foot level.

The Adelaide based company immediately decided to sell the mine, while share prices were high. They lacked money to finance extracting and processing the ore. There was a shareholder revolt, based largely on national pride. However later reality set in, when they realised the amount of extra money they would have to stump up. The mine was floated in London, the amount of shares doubling, making the mine heavily over capitalised.

This did not last long as in 1902, the company was wound up, the Kalgoorlie Amalgamated Limited taking over the mine. They in turn soon amalgamated with two other companies, in a continual process across the 20th century of lease consolidation across the Golden Mile.

In 1911, tributer Frederick Baum was killed in a fall of earth underground.

The lease sprang to life again in 1934, when the Golden Mile Block 45 Company NL was floated in Melbourne to take over the lease from Perth based Consolidated Goldmining Investment NL. Some drilling and general rooting around took place, until they ran out of funds. The lease was sold in 1939 to the Paringa Mining and Exploration Company Limited.

On June 2 1956, on the 60th anniversary of the telluride discovery, a plaque and obelisk was unveiled at or close to the Block 45 site. The map co-ordinates mark this site, although if correct, has been swallowed up by the super pit.

Commodity List

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

Mineral List

7 valid minerals.

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

0 - 2.588 Ma

ID: 742372
colluvium 38491

Age: Pleistocene (0 - 2.588 Ma)

Description: Colluvium and/or residual deposits, sheetwash, talus, scree; boulder, gravel, sand; may include minor alluvial or sand plain deposits, local calcrete and reworked laterite

Comments: regolith; synthesis of multiple published descriptions

Lithology: Regolith

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: 3187518
Archean volcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Greenstone belt; mafic-ultramafic 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, 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)
Kalgoorlie Western Argus newspaper (1896), Block 45 Gold- to the Ed., 04/06/1896
Kalgoorlie Miner newspaper (1896), Block 45, 02/06/1896
The West Australian newspaper (Perth) (1934), Block 45 G.M., 26/06/1934
The West Australian newspaper (Perth) (1937), Block 45 Suspends Operations, 01/05/1937
Coolgardie Miner newspaper (1937), Golden Mile Block 45. Government Grant Soughted, 09/12/1937
The Evening Star newspaper (Boulder) (1899), About the Mines. Block 45, 05/07/1899
The West Australian newspaper (Perth) (1939), Golden Mile Block 45, 15/04/1939
The Daily News newspaper (Perth) (1896), Block 45, 12/06/1896
The Inquirer and Commercial News newspaper (Perth) (1896), Block 45's Telluride, 05/06/1896
Western Mail newspaper (Perth) (1896), Discovery of Telluride. Developments in Block 45, 24/07/1896
Kalgoorlie Western Argus newspaper (1896), Directors Check-Mated. Block 45 Mine, 16/07/1896
Kalgoorlie Miner newspaper (1902), Hannans Block 45. Amalgamation Scheme Approved, 15/03/1902
Kalgoorlie Western Argus newspaper (1896), Block 45. A Big Discovery, 04/06/1896
Kalgoorlie Miner newspaper (1911), Block 45 Fatality. Frederick Baum's End. Verdict of Accidental Death, 28/11/1911
Simpson, E.S. (1948), Minerals of Western Australia, Vol 1, 2, & 3, State Government of Western Australia, 1948

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