Ungrouped Iron Meteorite | NWA 12984 | Coarse-grained octahedrite

For Sale. A beautiful slice of an ungrouped iron meteorite.

Name: Northwest Africa 12984
Abbreviation: NWA 12984
Observed fall: No
Year found: 2017
Country: Mauritania
Mass: 850 g

Specimen description:

Type, group, subgroup: Iron, Ungrouped

Specimen Weight: 21.40 grams

Approximate Measurements: 55 mm x 41 mm x 1.8 mm

Very beautiful Iron meteorite. Wonderful sample of Coarse-grained octahedrite. Ideal for any collection, both beginner and advanced collectors. Carefully stabilized and preserved.

Enjoy this beautiful meteorite.

IMCA #6460 Certified

Additional information:

Northwest Africa 12984 (NWA 12984)

Mauritania

Find: 2017

Classification: Iron meteorite (ungrouped)

History: Purchased online in 2017 by George Penneff from a seller in Mauritania.

Physical characteristics: Single stone with dark-brown fusion crust.

Petrography: (D. Sheikh, FSU) Coarse-grained octahedrite having a well-developed Widmanstätten pattern with 1.9-2. 8mm kamacite bands, taenite, and plessite. Troilite nodules present as well.

Geochemistry: (INAA, ActLabs) Ni=70.2 mg/g (DL=0.01 mg/g), Co=4.54 mg/g (DL=0.01 mg/g), Cr=353 µg/g (DL=1 µg/g), Cu=95 µg/g (DL=1 µg/g), Ga=37 µg/g (DL=1 µg/g), Ge=100 µg/g (DL=10 µg/g), As=11.2 µg/g (DL=0.5 µg/g), Re=0.23 µg/g (DL=0.01 µg/g), Ir=2.46 µg/g (DL=0.001 µg/g), Au=1.08 µg/g (DL=0.01 µg/g). Precision at detection limit to be ±100%, at ten times detection limit ±10-20% and at 100 times detection limit ±5%.

Classification: Iron, Ungrouped. Although Ni (70.2 mg/g) and Co (4.54 mg/g) as similar to IAB-MG, Au (1.08 ppm) is lower than that of IAB irons, and so this sample is ungrouped.