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Yilmia meteorite, Kambalda, Coolgardie Shire, Western Australia, Australia

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Latitude & Longitude (WGS84): 31° 11' 30'' South , 121° 32' 0'' East
Latitude & Longitude (decimal): -31.19167,121.53333
GeoHash:G#: qdqqt99z7
Locality type:Meteorite Fall Location
Meteorite Class:EL6 chondrite meteorite
Meteoritical Society Class:EL6
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Enstatite Chondrite, low-iron [EL6; S2]
1969 find, 40 kg, weathered


A crater with numerous fragments around a depression and a second, larger mass found 2 years later 400 meters away provided Australian geologists with the second largest known EL ( low-iron) Enstatite chondrite. While weathering is an issue, the uneven nature of the weathering has permitted a rather complete description of the meteorite including some detailed descriptions of very reduced phases found mostly in the Enstatite meteorite clan. Enstatite (mostly in well-defined Enstatite-rich chondrules, admixed with minor Silica) constitute ~ 60 wt.% of the meteorite. The other important components are Metal (~20 wt.% ), Plagioclase (~9 wt.%), and Troilite (~ 6 wt.% ). According to Buseck and Holdsworth (1972) the meteorite is ‘unique’ among Enstatite Chondrites in complexity, abundance of Taenite, and diversity of zincian materials and minor sulfides.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 valid minerals.

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Alabandite
Formula: MnS
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
'Albite-Anorthite Series'
Description: Plagioclase is highly albitic (Ab 80 An 16 Or 4)
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Daubréelite
Formula: Fe2+Cr3+2S4
Description: Zincian Daubréelite
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
'EL6 chondrite meteorite'
Reference: Meteoritical Society Database
Enstatite
Formula: MgSiO3
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Graphite
Formula: C
Description: rare
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972); Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
Iron
Formula: Fe
Description: Si-rich, characteristic of all Enstatite chondrites
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Iron var: Kamacite
Formula: (Fe,Ni)
Description: Si-rich, characteristic of all Enstatite chondrites
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Oldhamite
Formula: (Ca,Mg)S
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Osbornite
Formula: TiN
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Schreibersite
Formula: (Fe,Ni)3P
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
'Silica'
Description: An unidentified siica phase(s) is found with plagioclase and enstatite
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972); Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
Sinoite
Formula: Si2N2O
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Taenite
Formula: (Fe,Ni)
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Troilite
Formula: FeS
Reference: Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Graphite'1.CB.05aC
'Iron'1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Osbornite1.BC.15TiN
Schreibersite1.BD.05(Fe,Ni)3P
Sinoite1.DB.10Si2N2O
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
'Alabandite'2.CD.10MnS
'Daubréelite'2.DA.05Fe2+Cr3+2S4
Oldhamite2.CD.10(Ca,Mg)S
Troilite2.CC.10FeS
Group 9 - Silicates
'Enstatite'9.DA.05MgSiO3
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'EL6 chondrite meteorite'-
Silica-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Osbornite1.1.19.1TiN
Schreibersite1.1.21.2(Fe,Ni)3P
Taenite1.1.11.2(Fe,Ni)
Semi-metals and non-metals
Graphite1.3.6.2C
Sinoite1.3.9.1Si2N2O
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Alabandite2.8.1.4MnS
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 3:4
Daubréelite2.10.1.11Fe2+Cr3+2S4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Enstatite65.1.2.1MgSiO3
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'EL6 chondrite meteorite'-
Iron-Fe
Oldhamite-(Ca,Mg)S
'Silica'-

List of minerals for each chemical element

CCarbon
C GraphiteC
NNitrogen
N OsborniteTiN
N SinoiteSi2N2O
OOxygen
O EnstatiteMgSiO3
O SinoiteSi2N2O
MgMagnesium
Mg EnstatiteMgSiO3
Mg Oldhamite(Ca,Mg)S
SiSilicon
Si EnstatiteMgSiO3
Si SinoiteSi2N2O
PPhosphorus
P Schreibersite(Fe,Ni)3P
SSulfur
S AlabanditeMnS
S DaubréeliteFe2+Cr23+S4
S Oldhamite(Ca,Mg)S
S TroiliteFeS
CaCalcium
Ca Oldhamite(Ca,Mg)S
TiTitanium
Ti OsborniteTiN
CrChromium
Cr DaubréeliteFe2+Cr23+S4
MnManganese
Mn AlabanditeMnS
FeIron
Fe DaubréeliteFe2+Cr23+S4
Fe IronFe
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Schreibersite(Fe,Ni)3P
Fe Taenite(Fe,Ni)
Fe TroiliteFeS
NiNickel
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Schreibersite(Fe,Ni)3P
Ni Taenite(Fe,Ni)

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: 836735
ultramafic and minor mafic rocks 74475

Age: Archean (2500 - 4000 Ma)

Description: Tremolite-chlorite-talc amphibolite, metapyroxenite, pyroxenite, peridotite, serpentinite, ultramafic schists, komatiite, high-Mg basalt; also chalcedony, silica, jasper, silcrete, silica cap rock on ultramafic rocks

Comments: igneous ultramafic intrusive; meta-igneous ultramafic volcanic; synthesis of multiple published descriptions

Lithology: Igneous ultramafic intrusive; meta-igneous ultramafic volcanic

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: 3187518
Archean volcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Yilgarn Craton

Lithology: Greenstone belt; 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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Clarke, R. S., Jr. [Ed.] (1972) Meteoritical Bulletin, no. 51, Meteoritics 7 (2): 215-232. (Jun 1972)
Buseck, P. R. & Holdsworth, E. F. (1972) Mineralogy and Petrology of the Yilmia Enstatite Chondrite, Meteoritics 7 (4): p. 429. (Dec 1972)
Buseck, P. R. & Holdsworth, E. F. (1973) A new enstatite chondrite from Yilmia, Western Australia. Meteoritics 8(1): p. 23 (March 1973)
Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA.
Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.


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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