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Northwest Africa 13875
Basic information Name: Northwest Africa 13875
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13875
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1933 g
Meteoritical Bulletin:  MB 110  (2022)  LL(L)5
Recommended:  LL(L)5    [explanation]

This is the only approved meteorite classified as LL(L)5.
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Apr 2021
Writeup from MB 110:

Northwest Africa 13875 (NWA 13875)

(Northwest Africa)

Purchased: 2021 Mar

Classification: LL(L)5

History: The meteorite was purchased from a dealer in Morocco.

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: The meteorite shows a light grayish interior and is a brecciated ordinary chondrite with large, still mostly discernable chondrules (apparent mean diameter about 1 mm). The plagioclase grain size is about 60 µm. Some metal and sulfides are present in the matrix. Contains shock melt veins.

Geochemistry: The composition of olivine Fa26.3±0.1 (n=4) and orthopyroxene Fs21.9±0.1 (n=4)Wo1.7±0.1 (n=4) are at the limit between that of L and LL groups.

Classification: Ordinary chondrite LL(L)5. LL group is favored based on magnetic susceptibility, but the mineral composition is somewhat intermediate between L and LL groups, hence the LL(L) classification.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Mar
Mass (g):1933
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):26.3±0.1 (n=4)
Ferrosilite (mol%):21.9±0.1 (n=4)
Wollastonite (mol%):1.7±0.1 (n=4)
Magnetic suscept.:4.17
Classifier:A. Greshake, MNB
Type spec mass (g):28.5
Type spec location:MNB
Main mass:Polandmet
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 2021)
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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     This is 1 of 9772 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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