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Bencubbin meteorite, Bencubbin, Mount Marshall Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 30° 45' South , 117° 47' East
Latitude & Longitude (decimal): -30.75000,117.78333
GeoHash:G#: qdec04phq
Locality type:Meteorite Fall Location
Meteorite Class:CBa chondrite meteorite
Meteoritical Society Class:CBa
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:BSh : Hot semi-arid (steppe) climate


This meteorite was found in 1930, almost completely buried in newly cleared land, on Holland and Breakill's wheat farm (Block 2557), 15 kilometres north-west of Bencubbin.

It is pyramid-shaped, 30cm x 20cm at its base, 18cm x 13cm at the top, 23cm deep, 54kg and a specific gravity of 5.32.

The surface was covered completely by an oxidised layer, which also penetrated the meteorite along the surfaces of metallic masses. Under the layer, its colour is greyish to brownish black, with regular enstatite, coloured greyish white as single crystals 5-10mm in diameter and often multiply twinned. There was also dark olive coloured olivine crystals the same size as the enstatite.

Mineral composition is nickel iron 47.8%, troilite 1.6%, enstatite 23.1%, olivine 20.2%, anorthite 1% and chromite 0.2%.

The meteorite has been classified as a stony-iron or mesosiderite,but eventually became a Carbonaceous Chondrite Prototype (CBa) largely because of its silicate composition and its very unusual oxygen isotope ratios.



Mineral List


17 valid minerals.

Meteorite/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

Quaternary
0 - 2.588 Ma



ID: 780229
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: 3189638
Archean crystalline metamorphic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Amphibolite/granulite grade orthogneiss

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)
Simpson, E.S., Murray, D.G. (1932): A New Siderolite from Bencubbin, Western Australia, Mineralogical Magazine (March 1932): 23: 33-37.
Michael K. Weisberg, Martin Prinz & Cherukupalli Nehru (Dec 1990). The Bencubbin chondrite breccia and its relationship to CR chondrites and the ALH 85085 meteorite. Meteoritics 25, (#4), 269-279.
D. J. Barber & R. Hutchinson (1991): The Bencubbin stony-iron meteorite breccia - Electron petrography, shock-history and affinities of a 'carbonaceous chondrite' clast. Meteoritics 26, 83-95.

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