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Turkey Well, Leonora Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 28° 52' 32'' South , 120° 39' 6'' East
Latitude & Longitude (decimal): -28.87583,120.65194
GeoHash:G#: qdvg9x244
Locality type:Well
Köppen climate type:BWh : Hot deserts climate

Oldest known kimberlite at the time of writing.

Discovered by Stockdale Prospecting Limited in 1991 as a small weathered silicified macrocrystic kimberlite.

It shows relict olivine and phlogopite macrocrysts, and an altered groundmass of phlogopite and pseudomorphs after monticellite.

It is the third occurrence discovered for yimengite, a rare lithiophile element oxide, occurring at the site as a metosomatic alteration product of chromium spinel macrocrysts. It is rare at the deposit, associated with phlogopite, K-richterite, secondary diopside, Mg chromite, lindsleyite, Mg-Cr ilmenite, and Nb-Cr rutile.

Chomium rich spinel appears common, very rare pyrope-garnet and picro-ilmenite, with only two tiny diamond fragments found during drilling.

The site is just within the Menzies Shire, however access via the faint track to the remote location comes in from the east and the Leonora Shire, and it made sense to retain it under the latter shire to prevent confusion. It is not part of a goldfield or near a station homestead.

Mineral List

12 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 Macrostrat.org

Neoarchean - Mesoarchean
2500 - 3200 Ma

ID: 3187503
Archean intrusive rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Intrusive igneous 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]

2500 - 4000 Ma

ID: 785472
granite gneiss - high-Ca type 74313

Age: Archean (2500 - 4000 Ma)

Description: Banded to agmatitic felsic and/or granitic gneiss, migmatite; high-Ca group.

Comments: high grade metamorphic rock; synthesis of multiple published descriptions

Lithology: High grade metamorphic rock

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]

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.


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Kiviets, G. B., Phillips, D., Shee, S. R., Vercoe, S. C., Barton, E. S., Smith, C. B., & Fourie, L. F. (1998). 40Ar/39Ar dating of yimengite from Turkey Well kimberlite, Australia: the oldest and the rarest. Ext. Abstr. In 7th International Kimberlite Conference (pp. 432-434).

Mineral and/or Locality  
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