Eucrite-pmict | NWA 12407
9.70 g | NWA 12407 | Eucrite-pmict | Full slice | Fresh
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1700, Sofia, Bulgaria
9.70 g. Full slice of NWA 12407 Eucrite-pmict
Meteorite Name: Northwest Africa 12407
Abbreviation: NWA 12407
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Main Mass: 110 g.
Type, group, subgroup: Stone, achondrite, HED, Eucrite-pmict
Specimen Weight: 9.70 grams
Approximate Measurements: 37 mm x 27 mm x 3 mm
Additional Information: Full slice with fresh fusion crust.
Petrography: The meteorite is a polymict breccia with basaltic and black melt clasts set into a fine-grained clastic mineral matrix. Dominant minerals are magmatically zoned low-Ca pyroxenes, Fe-rich low-Ca pyroxenes with augite exsolution lamellae and calcic plagioclase typically 300-400 μm in size. Minor phases include silica, chromite, FeS, ilmenite, and FeNi metal.
Geochemistry: magmatic low-Ca pyroxene: Fs25.9±8.2Wo2.1±1.0 (Fs16.0-35.8Wo1.0-3.8, n=16, FeO/MnO=25±4); pyroxene host to augite lamellae: Fs54.8±2.7Wo2.4±0.8 (Fs49.0-58.2Wo1.9-4.6, n=13, FeO/MnO=30±1); Ca-pyroxene: Fs23.5±1.9Wo42.0±0.9 (Fs19.4-26.6Wo40.0-43.2, n=13, FeO/MnO=27±1); calcic plagioclase: An90.8±2.4 (An87.0-93.2, n=13)
Shock stage: low
Weathering grade: low
Ferrosilite (mol%): 25.9; 54.8; 23.5
Wollastonite (mol%): 2.1; 2.4; 42.0
Perfect polished. The meteorite is treated and polished without aggressive abrasives or chemicals that can damage it.
We have developed a gentle approach to handling our meteorites.
Elegant slices worthy of any collection.
Arrives with a certificate of authenticity. IMCA #6460
Note: The meteorite is sold without the scale cube.
HED meteorites are a clan (subgroup) of achondrite meteorites.
HED stands for "howardite–eucrite–diogenite".
These achondrites came from a differentiated parent body and experienced
extensive igneous processing not much different from the magmatic rocks
found on Earth and for this reason they closely resemble terrestrial igneous rocks.
These are all thought to have originated from the crust of the asteroid Vesta,
their differences being due to different geologic histories of the parent rock.
Their crystallization ages have been determined to be between 4.43 and 4.55 billion years from radioisotope ratios.
HED meteorites are differentiated meteorites, which were created by igneous processes in the crust of their parent asteroid.
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- 1700, Sofia, Bulgaria
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- €5,00 EUR
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