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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 1715 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1088 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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