Specimen send with certificate.
Physical characteristics: Interior shows little to no signs of weathering. Exterior largely dark colored with protruding metal clasts, typically cm-sized.
Petrography: The polished slices are dominated by black rounded clasts, surrounded by lighter-colored quenched melt and igneous-textured microporphyritic melt domains. The black clasts show an even distribution of metal and sulfide, typically 2 mm in the melt show eutectic textures. Grains smaller than 2 mm consist of Fe-Ni spheres with coatings of troilite. Chromite is a common accessory as anhedral grains to 200 μm.
Geochemistry: (L. Garvie, ASU) Black clast: Olivine Fa19.3±1.2, range Fa18.5-22.1, FeO/MnO=39.9±2.9, CaO to 2.2 wt%, Cr2O3=0.1±0.03, range 0.04 to 0.14 wt%, n=9. Low Ca pyroxene, Fs16.7±0.9Wo1.8±0.5, FeO/MnO=23.4±2.5, n=10. Two high-Ca pyroxene grains found, Fs6.8Wo44.4 and Fs6.1Wo45.4. Feldspar Or2.0±0.4Ab76.2±0.9, n=5.
Classification: H5-melt breccia. Low weathering, W1, and high shock.
- Forme minérale / Type météorite
- Météorite Tassédet 004; Classifié comme H5-Melt Breccia - Individuel
- 117.1 g
- Origine (région / ville)
- Région d'Agadez (~ 18 ° 40'30 "N, ~ 7 ° 23'53" E)
- Origine (pays)