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Shamrock Gold Mine, Eastern Creek gold area, Ripon Hills District, East Pilbara Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 21° 41' 55'' South , 120° 37' 16'' East
Latitude & Longitude (decimal): -21.69865,120.62129
GeoHash:G#: qsju8ccsp
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate


The first report found was 1909, a year after the discovery of gold at Eastern Creek. Chiavi and Edmund (surnames) are working the lease, adjoining the Rose lease to the east.

In 1911, it is reported Clifford and O'Brien (surnames) had 120 tonnes of ore at grass. Edmunds and Garland had 45 tonnes also from the same lease.

By 1914, the lease had produced 350.25 tonnes of ore for 591.47 ounces of gold. GML 178L. 6 acres.

Another report surfaces in 1924, with a crushing but no names are mentioned.

Gibb-Maitland states the workings were a series of open cuts down to a depth of 10 feet. The reef was 6 to 12 inches wide, of dark coloured quartz, which carries large pyrite crystals called 'devils dice'. At the north-east boundary of the lease is a pipe like body, 4 feet wide, down to 40 feet below the surface in soft brown schist which changes to black at depth.


Commodity List

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


Mineral List


3 valid minerals.

Rock Types Recorded

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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: 728473
Mosquito Creek Formation

Age: Archean (2500 - 4000 Ma)

Stratigraphic Name: Mosquito Creek Formation

Description: Lower part: interbedded conglomerate, massive coarse-grained sandstone, siltstone and shale: Upper part: thinly bedded sandstone interbedded with siltstone and shale; metamorphosed.

Comments: sedimentary siliciclastic; argillaceous detrital sediment; synthesis of multiple published descriptions

Lithology: Sedimentary siliciclastic; argillaceous detrital sediment

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]

Mesoarchean
2800 - 3200 Ma



ID: 3188669
Archean sedimentary rocks

Age: Mesoarchean (2800 - 3200 Ma)

Comments: Pilbara Craton

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License



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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
The Pilbara Goldfields News newspaper (Marble Bar) (1911), Nullagine, 03/03/1911
The Pilbara Goldfields News newspaper (Marble Bar) (1909), Eastern Creek Properties, 08/01/1909
Daily Telegraph North Murchison and Pilbara Gazette newspaper (1924), Nullagine Notes, 01/08/1924
Kalgoorlie Miner newspaper (1914), Mining at Nullagine, 20/10/1914
Gibb-Maitland, A. (1908), The Geological Features and Mineral Resources of the Pilbara Goldfield, Geological Survey of Western Australia, State Government of Western Australia, 1908

 
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