NWA 16180 - 陨石 普通球粒陨石 (L3-5) - 高度: 104 mm - 宽度: 79 mm - 36.99 g

Complete slice of NWA 16180 L3-5 : one side mirror polished.

Acquired from Mustapha Oulkouch in Ensishiem 2024
Dimensions : 104*79*1-2 mm
Weight : 36,99gr

Name: Northwest Africa 16180
Abbreviation: NWA 16180
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 3.58 kg

Writeup from MB 112:
Northwest Africa 16180 (NWA 16180)
Purchased: 2022
Classification: Ordinary chondrite (L3-5)
History: Purchased in 2022 by Mustapha Oulkouch from Ali Naji in Guelmim, Morocco.
Physical characteristics: Single stone with dark brown fusion crust.
Petrography: (D. Sheikh, Cascadia) Sample is a genomict breccia comprised of chondrules (Av. ~700 μm) and mm-sized sub-angular clasts set within a fine-grained matrix. Multiple lithologies are present in this sample: 1) A Type 5 lithology containing equilibrated olivine/low-Ca pyroxene and secondary recrystallized feldspar (Av. ~25 μm), 2) A Type 4 lithology containing equilibrated olivine, unequilibrated low-Ca pyroxene, and devitrified glass, and 3) A Type 3 lithology containing unequilibrated olivine/low-Ca pyroxene. Accessory phases identified include Fe-Ni metal, troilite, and chromite.

Geochemistry: Type 3 Unequilibrated Olivine (Fa22.5±6.8, range Fa10.9-31.0, n=7), Type 4-5 Equilibrated Olivine (Fa25.2±0.3, range Fa24.3-25.8, n=33), Type 3-4 Unequilibrated Low-Ca Pyroxene (Fs9.4±5.8Wo0.9±0.8, range Fs3.4-22.5Wo0.3-3.0, n=16), Type 5 Equilibrated Low-Ca Pyroxene (Fs21.1±0.5Wo1.6±0.4, range Fs20.1-22.1Wo0.4-2.4, n=26).

Classification: Ordinary Chondrite (L3-5).

Specimens: 39.7 g at Cascadia (33.1 g in two pieces, remaining material is in an epoxy stub), main mass with Mustapha Oulkouch and Abdelkbir Oulgour.

Cut and polished by La Pierrerie de l'Aïr
Shipped by La Pierrerie de l'Aïr, from Belgium.
Tracking and insurance included in shipping costs.
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