NWA 16811 ( 32,500 g )

Northwest Africa 16811 (NWA 16811)
(Northwest Africa)
Purchased: 2024 Mar
Classification: Carbonaceous chondrite (CVox3)
History: Purchased in March 2024 by Habib Naji Naji.
Physical characteristics: Single stone with slightly weathered fusion crust.
Petrography: (D. Sheikh, Cascadia) Sample is comprised of chondrules (Av. ~1 mm, up to 3 mm), refractory inclusions (Av. ~1.5 mm, up to 4 mm), and isolated mineral fragments (generally sub-mm in size) set within a fine-grained Fe-rich matrix; chondrule/CAI/matrix modal abundances are 50/4/46 vol. % respectively. Accessory phases identified include magnetite (present generally as rounded blebs within chondrules), pentlandite, and spinel.
Geochemistry: Olivine (Fa24.1±15.0, range Fa0.5-45.8, n=25), Low-Ca Pyroxene (Fs1.3±0.6Wo1.0±0.5, range Fs0.8-3.0Wo0.7-2.3, n=11), Ni content of pentlandite (in wt. %): 7.3±0.1, n=2.
Classification: Carbonaceous Chondrite (CV3).
Specimens: 21.3 g at Cascadia, main mass with Habib Naji Naji.
 
Place of purchase:
Northwest Africa
Date:
P 2024 Mar
Mass (g):
11182
Pieces:
1
Class:
CVox3
Shock stage:
S2
Weathering grade:
low
Fayalite (mol%):
24.1±15.0
Ferrosilite (mol%):
1.3±0.6
Wollastonite (mol%):
1.0±0.5
Classifier:
D. Sheikh, Cascadia
Type spec mass (g):
21.3
Type spec location:
Cascadia
Main mass:
Habib Naji Naji
Comments:
CML 1791; HN11; submitted by Daniel Sheikh