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Adelie Land meteorite, George V Land, Eastern Antarctica, Antarcticai
| Regional Level Types | |
|---|---|
| Adelie Land meteorite | Meteorite Fall Location |
| George V Land | Territory |
| Eastern Antarctica | Region |
| Antarctica | Continent |
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Latitude & Longitude (WGS84):
67° 10' 59'' South , 142° 22' 59'' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
KÃķppen climate type:
Ordinary chondrite (L5)
Find, 1912; 1 kg
A meteoritic stone was found on the snow ~30 km W. of Cape Denison during the Australasian Antarctic Expedition of 1911-1914. Inspections reveal chondrules and chondrule fragments within a largely equilibrated matrix. A few chondrules are unusually chromite-rich. Compositionally, equilibrated olivine (Fa24) and low Ca-orthopyroxene ('hypersthene') are characteristic of the L-chondrite chemical group. Mineralogically, the meteorite consists primarily of olivine accompanied by orthopyroxene along with minor plagioclase, troilite, and Fe-Ni metal. Accessory chromite, ilmenite, and isocubanite have also been reported.
A U-He age of ~3.49 Ga is reported, possibly indicative of a major collision involving an intermediate parent body (IPB) subsequent to the original formation of a putative L-chondrite parent body. With a terrestrial exposure age of ~70 ka, the meteorite had presumably been sequestered beneath the ice for most of that time before being brought to the surface where it would be readily noticed by a human being.
The main mass has been held at the South Australian Museum in Adelaide.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
7 valid minerals.
Meteorite/Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| â Chromite Formula: Fe2+Cr3+2O4 Description: Chromite-rich chondrules present. |
| â 'Fayalite-Forsterite Series' Description: Olivine composition (Fa24) characteristic of L chondrite chemical group [Mason,1963]. |
| â 'Glass' Description: Present in some chondrules. |
| â Ilmenite Formula: Fe2+TiO3 |
| â Isocubanite Formula: CuFe2S3 Description: Textural considerations presumably suggested to Ramdohr that the isocubanite was primary (preterrestrial). However, confirmation from isotopic studies seems needed before confidence in this conclusion would be warranted. |
| â Native Copper Formula: Cu |
| â Native Iron Formula: Fe |
| â Native Iron var. Kamacite Formula: (Fe,Ni) |
| â 'Orthopyroxene Subgroup' |
| â 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
| â Taenite Formula: (Fe,Ni) |
| â Troilite Formula: FeS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| â | Native Copper | 1.AA.05 | Cu |
| â | Native Iron | 1.AE.05 | Fe |
| â | var. Kamacite | 1.AE.05 | (Fe,Ni) |
| â | Taenite | 1.AE.10 | (Fe,Ni) |
| Group 2 - Sulphides and Sulfosalts | |||
| â | Isocubanite | 2.CB.55b | CuFe2S3 |
| â | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| â | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| â | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Unclassified | |||
| â | 'Fayalite-Forsterite Series' | - | |
| â | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| â | 'Orthopyroxene Subgroup' | - | |
| â | 'Glass' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | â Chromite | Fe2+Cr23+O4 |
| O | â Ilmenite | Fe2+TiO3 |
| O | â Fayalite-Forsterite Series | |
| O | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | Sodium | |
| Na | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | â Fayalite-Forsterite Series | |
| Al | Aluminium | |
| Al | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | â Fayalite-Forsterite Series | |
| Si | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| S | Sulfur | |
| S | â Isocubanite | CuFe2S3 |
| S | â Troilite | FeS |
| Ca | Calcium | |
| Ca | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | â Ilmenite | Fe2+TiO3 |
| Cr | Chromium | |
| Cr | â Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | â Chromite | Fe2+Cr23+O4 |
| Fe | â Ilmenite | Fe2+TiO3 |
| Fe | â Native Iron | Fe |
| Fe | â Isocubanite | CuFe2S3 |
| Fe | â Native Iron var. Kamacite | (Fe,Ni) |
| Fe | â Taenite | (Fe,Ni) |
| Fe | â Troilite | FeS |
| Fe | â Fayalite-Forsterite Series | |
| Ni | Nickel | |
| Ni | â Native Iron var. Kamacite | (Fe,Ni) |
| Ni | â Taenite | (Fe,Ni) |
| Cu | Copper | |
| Cu | â Native Copper | Cu |
| Cu | â Isocubanite | CuFe2S3 |
Other Databases
| Wikipedia: | https://en.wikipedia.org/wiki/Adelie_Land_meteorite |
|---|---|
| Wikidata ID: | Q355052 |
Other Regions, Features and Areas containing this locality
Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate
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References
Mason, Brian (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta, 27 (10) 1011-1023 doi:10.1016/0016-7037(63)90062-0
Ramdohr, Paul (1967) Chromite and chromite chondrules in meteoritesâI. Geochimica et Cosmochimica Acta, 31 (10) 1961-1967 doi:10.1016/0016-7037(67)90135-4
