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Northwest Africa 15437
Basic information Name: Northwest Africa 15437
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15437
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 986 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  LL(L)3
Recommended:  LL(L)3    [explanation]

This is 1 of 26 approved meteorites classified as LL(L)3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 29 Jan 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15437 (NWA 15437)

(Northwest Africa)

Purchased: 3 Dec 2021

Classification: Ordinary chondrite (LL(L)3)

History: Purchased on 3 Dec 2021 by Chris Monk from Younes Chaoui.

Physical characteristics: Many individual stones with dark-brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Unequilibrated ordinary chondrite composed of well-defined chondrules (Av. Diameter ~725±305 μm, n=28) set within a fine-grained matrix containing accessory Fe-Ni metal, troilite, and chromite.

Geochemistry: Olivine (Fa23.4±16.7, range Fa1.7-62.9, n=32), Low-Ca Pyroxene (Fs9.0±6.0Wo0.8±0.5, range Fs1.3-24.2Wo0.2-2.4, n=24).

Classification: Ordinary Chondrite LL(L)3.

Specimens: 23.07 g at Cascadia, main mass with Chris Monk.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 3 Dec 2021
Mass (g):986
Pieces:many
Class:LL(L)3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.4±16.7
Ferrosilite (mol%):9.0±6.0
Wollastonite (mol%):0.8±0.5
Classifier:D. Sheikh, Cascadia
Type spec mass (g):23.07
Type spec location:Cascadia
Main mass:Chris Monk
Comments:CML 1569; 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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