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Northwest Africa 13661
Basic information Name: Northwest Africa 13661
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13661
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 125 g
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1999 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13661 (NWA 13661)

Algeria

Find: 2018

Classification: Ordinary chondrite (L4)

History: Purchased in 2020 by Matthew Stream from a seller in Algeria.

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

Petrography: (D. Sheikh, FSU) Specimen is a chondrite containing chondrules (~900±100 µm), kamacite, chromite, and troilite.

Geochemistry: Olivine (Fa24.1±0.7, range Fa23.2-26.6, n=52), Low-Ca Pyroxene (Fs20.1±3.2Wo1.1±0.5, range Fs16.4-27.3Wo0.4-2.1, n=17).

Classification: Ordinary Chondrite (L4)

Specimens: 25.3 g at UCLA; main mass with Matthew Stream.

Data from:
  MB110
  Table 0
  Line 0:
Date:2018
Mass (g):125
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):24.1±0.7
Ferrosilite (mol%):20.1±3.2
Wollastonite (mol%):1.1±0.5
Classifier:D. Sheikh, FSU
Type spec mass (g):25.3
Type spec location:UCLA
Main mass:Matthew Stream
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1236 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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