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Harrison's Reward, Noongal Station, Yalgoo Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 28° 8' 18'' South , 116° 42' 27'' East
Latitude & Longitude (decimal): -28.13851,116.70756
GeoHash:G#: qdfzztxc7
Köppen climate type:BWh : Hot deserts climate

Numerous pegmatites surround the edge of a geographic feature called The Basin, named by E.S. Simpson, who was first to describe them. The pegmatites are 10-25 kilometres north of Yalgoo. The Basin GPS co-ordinates are suggested as 474,454E 6,885,912N UTM50 AGD66. Many of the pegmatites remain un-named and not described.

Harrison's Reward pegmatite contains two pits measured as 472,753E 6,887,359N and 472,789E 6,887,310N UTM50 AGD66. Simpson visited in 1913 and noted two shafts, the miners recovering bismutite, scheelite, quartz, and minor feldspar. Topaz was discovered at the site and nearby pegmatites in 1932. It is always associated with pseudomorphs of muscovite after topaz. The topaz is colourless, or milk white in masses up to 1.5kg in weight. These represent a single crystal with parts colourless and transparent to 5mm, and translucent to 10mm. They have been described as a F-type containing fluorine. (18.55%).

The pegmatite trends south-east and dips 70 degrees west, is highly siliceous composed mostly of quartz and biotite.

Mineral List

18 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

2500 - 4000 Ma

ID: 846938
hi-Ca granite 74296

Age: Archean (2500 - 4000 Ma)

Description: Monzogranite, granodiorite, tonalite, quartz monzonite; in places recrystallised and foliated; some mixed granite and country rock assemblages; high-Ca granite

Comments: igneous felsic intrusive; igneous intermediate intrusive; synthesis of multiple published descriptions

Lithology: Igneous felsic intrusive; igneous intermediate intrusive

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: 3189631
Archean sedimentary and volcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: 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 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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Jacobson, M., Calderwood, M., Grguric, B.(2007): Pegmatites of Western Australia (2007)
Fetherston, J.M., Stocklmayer, S., Stocklmayer, V.C.(2013): Gemstones of Western Australia- mineral resources bulletin 25, Geological Survey of Western Australia (2013): 78

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