Adelaide meteorite, Adelaide, South Mt Lofty Ranges (Adelaide Hills), Mt Lofty Ranges, South Australia, Australia
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|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||34° South , 138° East (est.)|
|Margin of Error:||~62km|
|Non-native locality type:||Meteorite|
|Meteorite Class:||Ungrouped C2 chondrite meteorite|
|Meteoritical Society Class:||C2-ung|
|Metbull:||View entry in Meteoritical Bulletin Database|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
Due to the lack of origin for this meteorite, and it history and name. It is listed under the location Adelaide, the current location and namesake of the specimen.
Classification: Carbonaceous Chondrite, Ungrouped (C2-ung)
m = ~2.03 kg, 2 pieces, weathered
After being in its possession for several years, the South Australian Department of Mines recognized that a rather weathered and utterly undocumented stone was a meteorite — indeed, a quite unusual meteorite. Early on its chemical and textural affinities to various Carbonaceous Chondrites were recognized, but when examined carefully the Adelaide meteorite did not quite match the properties of any the then recognized groups. Today, after four decades, the recognition of several new meteorite groups and the adoption of more detailed isotopic criteria, it is clear that Adelaide is indeed a Carbonaceous Chondrite — and it is also abundantly clear that Adelaide does not belong to any of the presently recognized Carbonaceous Chondrite groups. Terrestrial weathering has complicated matters, but — for now at least — it seems that Adelaide may be just one more solitary representative of an unknown homeworld.
Adelaide is rich in Chondrules (usually Olivine-rich, but often varying amounts of pyroxene, plagioclase, and/or glass can also be found). In addition to silicates, the various clasts, aggregates, and matrix also contain magnetite [≥3 vol%], sulfides, quasi-amorphous matter, and terrestrial weathering products. And, Adelaide has a goodly number of refractory inclusions — most of them rich in core spinel accompanied by various mineral mixes. The rims of the inclusions are often rimmed with (sometimes Ferroan) olivine — which seems to have been relatively abundant during the last stages of inclusion formation. It even has a small complement of pre-solar phases (Al-rich oxides, silicon carbide). The phases are often non-stoichiometric or too small for definitive mineralogical definition. This situation, of course, may change.
17 valid minerals.
Meteorite/Rock Types Recorded
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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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Davy, R., Whitehead, S. G. & Pitt, G. (1978): The Adelaide Meteorite. Meteoritics 13 (1): 121-140. (March 1978)
Hutcheon, I. D. & Steele, I. M. (1982). Refractory Inclusions in the Adelaide Carbonaceous Chondrite (Abstract). Lunar and Planetary Science XIII: pp. 352-353. (March 1982).
Brearley, A. J. (1991). Mineralogical and Chemical Studies of Matrix in the Adelaide Meteorite. Abstracts of the Lunar and Planetary Science Conference XXII, 133-134. (March 1991).
Weber, D. & Bischoff, A. (1994). The occurrence of grossite (CaAl4O7) in chondrites. Geochimica et Cosmochimica Acta 58 (18), 3855-3877. (Sept 1994)
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)
Floss, C. & Stadermann, F. J. (2012) Presolar silicate and oxide abundances and compositions in the ungrouped carbonaceous chondrite Adelaide and the K chondrite Kakangari: Meteoritics & Planetary Science 47(6): 992-1009. (June 2012)