陨石：深成安格赖陨石，Rafsa 007。 非常罕见，无底价。 - 1 g

Rafsa 007 28.642936°N, 8.199231°W
Tindouf, Algeria
Purchased: 2023
Classification: Angrite
History: 据报道，数个撒哈拉陨石猎人小组在2023年夏末，在廷杜夫北约约100公里的区域发现了该陨石的若干碎片。

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.

岩石学： (K. Metzler, IfP) 以颗粒状结构为主的超镁质岩，主要由富Ca橄榄石组成（可达数毫米），其内包裹着含铝-钛的辉石斜长石（约1毫米），并含有少量 Cr 含量的 pleonast 尖晶石（约0.5毫米）。后者常以微米级薄边缘环绕在尖晶石晶粒周围。伴生物为 Fe-Ni 金属、 troilite（硫化铁）和 Merrillite。大部分金属已被地球化改变，并形成穿透整块岩石的细脉。

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.