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Green's Well pegmatite (Green's Tank), Pilgangoora (Pilgangoora Mining Centre; Lynas Find; McPhees Patch; Mount York), Wallareenya Station, Port Hedland Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 21° 2' 44'' South , 118° 54' 0'' East
Latitude & Longitude (decimal): -21.04562,118.90009
GeoHash:G#: qsk838u2k
Locality type:Pegmatite
Köppen climate type:BWh : Hot deserts climate

This is one of a swarm of lepidolite-spodumene pegmatites with accessory columbite-tantalite, known since 1905. First noted by E.S. Simpson in 1917, with the discovery of tapiolite at the location, then more fully described by him in 1948, various names were used including McPhee's Range, Mount York, Chingamong Creek, Pilgangoora and Greens's Well to describe the north trending belt of pegmatites.

The well at Green's Well no longer exists. Its exact location is vague. The reference with no certainty suggests nine kilometres south-east of the Pilgangoora mining centre. Simpson who investigated the site in the 1930's states it is about 10 miles north-west of Green's Well, which covers the entire area known in the 1950's as the Pilgangoora mining centre. Due to the construction of iron-ore railway lines to the coast, access to many sites in the region, including this one is now difficult, as they block travel along back roads in an east-west direction.

Manganotantalite was discovered at Green's Well in 1905 by Bonner and party. Green's Well is the type locality for ferrocolumbite, but it is not common in the pegmatite field. It is found as euhedral crystals in matrix, and in eluvium overlying the pegmatites.

There are many prospects listed from the source under the Green's Well Mindat sub-heading. Locations of these are vague. Localities named McPhee's Range exist north of Mount York. Localities named Mount York are located five kilometres south of Trig Station CC32. Chingamong Creek in the literature actually is referring to Chinnamon Creek, a north-west flowing usually dry creek just south of Mount York. The Pilgangoora Trig Station CC32 is a prominent hill near the pegmatites.

After the discovery of manganotantalite and alluvial tantalite at Green's Well in 1905, a digging was opened by G.J. Hooley in 1928 5 kilometres north of here. Small scale occasional mining took place on the field till 1944. Mining increased between 1947 to 1975 but still only 50 tonnes of tantalite and thirteen tonnes of cassiterite concentrates. Electrolytic Zinc Company explored the area from 1966-1970. Alluvial mining was conducted by Pilgan Mining Pty Ltd during 1978-1982 and 1992-1996. Kanowna Lights Limited, Prima Resources NL and Fieldcorp Pty Ltd have explored the sites in recent years.

Government geologist, E.S. Simpson states the following in 1928, specifically relating to species. Small water worn pebbles and lodes of microlite, calciotantalite, ferrotantalite, ferrocolumbite, manganotantalite and manganocolumbite. Crystals were said to be common in the latter. Tapiolite is found as small twinned crystals.

The Mindat co-ordinates originally used are not referenced, and place the location outside the Pilgangoora area. It has been listed instead under the Pilgangoora Mining Centre sub-heading until confirmed.

Mineral List

Mineral list contains entries from the region specified including sub-localities

16 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

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Rock list contains entries from the region specified including sub-localities

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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: 870902
Motherin Monzogranite

Age: Archean (2500 - 4000 Ma)

Stratigraphic Name: Motherin Monzogranite

Description: Interleaved monzogranite, granodiorite, granitic gneiss, and pegmatite; strongly foliated to banded to gneissic; intruded by granite pegmatite sheets; metamorphosed

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

Lithology: Igneous felsic intrusive; 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]

2800 - 3200 Ma

ID: 3190535
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

Localities in this Region
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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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Jacobson, M.I., Calderwood, M.A., Grguric, B.A. (2007) Guidebook to the Pegmatites of Western Australia. Hesperian Press, Carlisle, Western Australia, 394 pages.
Simpson, E.S. (1917) On Tapiolite in the Pilbara goldfield, Western Australia. Mineralogical Magazine 18:84, 107-121.

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