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Steingarden Nunataks 07012 meteorite, Steingarden Nunataks site, Queen Maud Land, Eastern Antarctica, Antarcticai
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Latitude & Longitude (WGS84):
72° 19' 32'' South , 16° 8' 35'' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Deposit first discovered:
2007
Köppen climate type:
Other/historical names associated with this locality:
STG 07012
Official name: Steingarden Nunataks 07012
Abbreviation: STG 07012
Observed fall: no
Found: 2007
Coordinates (Meteoritical Bulletin 102): 72°19.536' S, 16°8.584' E
Recovered weight: 11.42 g
L5/6 chondrite, shock stage S3, weathering grade W0-W1
The find was made on blue ice at the edge of a large blue ice field (Delisle et al., 2015).
The meteorite is a stone partly covered by a black fusion crust with some minor oxidation around metal grains. A cut surface reveals the fresh-looking light grey interior with some dispersed metal flakes and in places well-defined chondrule outlines. Not well-delineated but clearly discernible chondrules (up to ~ 6 mm) have been observed in thin section. In places, chondrule outlines are indistinct in the recrystallised matrix. Twinned clinopyroxene is absent. The apparent diameter of plagioclase crystals is < 50 ÎŒm. Shock metamorphic features comprising undulatory extinction of olivine and pyroxene, and the presence of planar fractures in olivine indicate that the meteorite is weakly shocked. Weathering effects are limonitic staining and very rare oxide rims around metal grains.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
1 valid mineral.
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 Forsterite Formula: Mg2SiO4 Description: Average composition of olivine Fa22.7 References: |
| â 'Low-calcium pyroxene' Description: Average composition Wo20.0±0.5Fs1.6±0.1 References: |
| â 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| â | Forsterite | 9.AC.05 | Mg2SiO4 |
| Unclassified | |||
| â | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| â | 'Low-calcium pyroxene' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | â Forsterite | Mg2SiO4 |
| O | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | Sodium | |
| Na | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | â Forsterite | Mg2SiO4 |
| Al | Aluminium | |
| Al | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | â Forsterite | Mg2SiO4 |
| Si | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | Calcium | |
| Ca | â Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Other Regions, Features and Areas containing this locality
Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate
- Tonian Oceanic Arc TerraneVolcanic Arc
Antarctica
- Transantarctic MountainsMountain Range
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