Upea pala kuun maaspaattista brecciaa Ghardaia 001!! - 13.9 g
Nro. 83919731
Meteoriitti Plutoninen angriitti, Rafsa 007. Erittäin harvinainen, ei varaushintaa - 1.75 g
Nro. 83919731
Meteoriitti Plutoninen angriitti, Rafsa 007. Erittäin harvinainen, ei varaushintaa - 1.75 g
Rafsa 007 28.642936°N, 8.199231°W
Tindouf, Algeria
Purchased: 2023
Classification: Angrite
History: Reportedly several groups of Sahrawi meteorite hunters found several fragments of this meteorite in an area ~100 km north of Tindouf at the end of summer 2023.
Petrography: (K. Metzler, IfP) Ultramafic rock with granular texture, mainly consisting of Ca-rich olivine (up to several mm) which encloses Al-Ti-bearing diopside (up to ~1 mm) and small amounts of Cr-bearing pleonast spinel (up to ~0.5 mm) and anorthite. The latter frequently occurs as thin ( µm) rims around spinel grains. Accessories are Fe-Ni metal, troilite, and merrillite. Much of the metal has been terrestrially altered and forms thin veins crosscutting the entire rock.
Geochemistry: Mineral compositions and geochemistry: Olivine composition: Fa39.0±0.4 (Fa38.4-39.5); Fe/Mn (at.): 87.4; CaO = 1.0-1.3 wt%; n=13. Pyroxene composition: Fs10.7±0.6 Wo52.9±0.6 (Fs9.7-11.6 Wo51.8-54.0); Fe/Mn (at.): 52.9; Al2O3 (wt%) = 6.9-9.5; TiO2 (wt%) = 1.6-2.4; n =11. Feldspar composition: An99.4±0.5 Or0.0±0.0 (An98.5-100.0 Or0.00); n=12. Pleonast spinel: Mg/(Mg+Fe (at.) = 0.47-0.50; Cr2O3 (wt%) = 4.5-5.5; Al2O3 (wt%) = 56.9-58.6; n=14.
Classification: Plutonic angrite, based on mineral chemistry and texture.
Shock stage: U-S1
Weathering grade: Moderate
Classifier: K. Metzler, IfP
This lot comes with certificate of authenticity.
Thanks for your interest.
Saattaisit pitää myös
Tämä esine oli esillä kohteessa
Näin ostat Catawikistä
1. Löydä jotain erityistä
2. Tee korkein tarjous
3. Maksa turvallisesti