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Northwest Africa 16180
Basic information Name: Northwest Africa 16180
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16180
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 3.58 kg
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  L3-5
Recommended:  L3-5    [explanation]

This is 1 of 24 approved meteorites (plus 1 unapproved name) classified as L3-5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 3 Sep 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 16180 (NWA 16180)

(Northwest Africa)

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.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022
Mass (g):3575
Pieces:1
Class:L3-5
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):25.2±0.3; 22.5±6.8
Ferrosilite (mol%):21.1±0.5; 9.4±5.8
Wollastonite (mol%):1.6±0.4; 0.9±0.8
Classifier:D. Sheikh, Cascadia
Type spec mass (g):39.7
Type spec location:Cascadia
Main mass:Mustapha Oulkouch and Abdelkbir Oulgour
Comments:CML 1664; 4MO.AO; submitted by Daniel Sheikh
Institutions
   and collections		 Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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