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Yamato 74459 meteorite, Queen Fabiola Mts, Queen Maud Land, Eastern Antarctica, Antarcticai
| Regional Level Types | |
|---|---|
| Yamato 74459 meteorite | Meteorite Fall Location |
| Queen Fabiola Mts | Mountain Range |
| Queen Maud Land | Region |
| Eastern Antarctica | Region |
| Antarctica | Continent |
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Latitude & Longitude (WGS84):
71° 43' 35'' South , 35° 58' 30'' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Other/historical names associated with this locality:
Y-74459
Official name: Yamato 74459
Synonym: Y-74459
Observed fall: no
Found: 1974
Coordinates: 71°43'35"S, 35°58'30"E
Approx. recovered weight: 1.72 kg
Chondrite, type H6
For Yamato-74459 chondrite, the exposure age of about 4.3 Myr can be evaluated. Pyroxene grains in this chondrite are recording much higher fission track components than those expected from the spontaneous fission of 238U during 4.6×109 yr. The contributions from neutron induced fission events can be ignored in comparing with the total fission tracks. These excesses are attributable to the spontaneous fission of presently extinct nuclide 244Pu (half-life 82 Myr). Then, the time interval between the end of nucleosynthesis and the onset of track retention, ΔT, calculated for bronzite grains in this meteorite is estimated to 5×107 (Yabuki, 1978).
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:
| ⓘ Enstatite Formula: Mg2Si2O6 |
| ⓘ Enstatite var. Bronzite Formula: (Mg,Fe2+)2[SiO3]2 |
| ⓘ 'Fayalite-Forsterite Series' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | var. Bronzite | 9.DA.05 | (Mg,Fe2+)2[SiO3]2 |
| Unclassified | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Enstatite | Mg2Si2O6 |
| O | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
| O | ⓘ Fayalite-Forsterite Series | |
| Mg | Magnesium | |
| Mg | ⓘ Enstatite | Mg2Si2O6 |
| Mg | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
| Mg | ⓘ Fayalite-Forsterite Series | |
| Si | Silicon | |
| Si | ⓘ Enstatite | Mg2Si2O6 |
| Si | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
| Si | ⓘ Fayalite-Forsterite Series | |
| Fe | Iron | |
| Fe | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
| Fe | ⓘ Fayalite-Forsterite Series | |
Other Regions, Features and Areas containing this locality
Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate
- Tonian Oceanic Arc TerraneVolcanic Arc
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