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Northwest Africa 13472
Basic information Name: Northwest Africa 13472
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13472
Observed fall: No
Year found: 2018
Country: Mauritania
Mass:help 814 g
Recommended:  LL4-6    [explanation]

This is 1 of 78 approved meteorites classified as LL4-6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 2 Nov 2020
Writeup from MB 109:

Northwest Africa 13472 (NWA 13472)


Find: 2018

Classification: Ordinary chondrite (LL4-6)

History: Collected by a nomad in an undetermined place in northern Mauritania during 2018. Purchased by Geologist Juan Avilés Poblador in Spring 2019 on behalf of the University of Alicante (Earth Sciences Department, Laboratory of Applied Petrology).

Physical characteristics: The single, 814 g stone has a tan colour and is partially covered by a dark fusion crust. Cut surfaces reveal a brecciated texture, including clasts up to ~3 cm across.

Petrography: (C. Herd, UAb) Optical and microprobe examination of a polished thin section shows two ~10 mm wide equilibrated clasts in a matrix of well-delineated chondrules. Minor iron staining is present. Olivine in the matrix has sharp optical extinction with <2° angular variation (S1); in the clasts it has weak mosacism and planar fractures (S4).

Geochemistry: (C. Herd and A. Locock, UAb) Data obtained by EMP examination of carbon-coated thin section: Olivine Fa29.3±0.9 (n=144); Low-Ca Pyroxene Fs24.1±0.8Wo1.3±0.5 (n=64).

Classification: Ordinary chondrite, LL4-6

Specimens: Type specimen of 46.9 g, including one thin section, is at UAb. Main mass at UAlic.

Data from:
  Table 0
  Line 0:
Mass (g):814
Shock stage:S4
Weathering grade:W1.0
Fayalite (mol%):29.3± 0.9 (n=144)
Ferrosilite (mol%):24.1± 0.8 (n=64)
Wollastonite (mol%):1.3± 0.5 (n=64)
Classifier:C. Herd, UAb
Type spec mass (g):46.9
Type spec location:UAb
Main mass:UAlic
Comments:Field number 8; submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
UAlic: Earth Sciences Department University of Alicante San Vicente del Raspeig, Spain (institutional address; updated 9 Feb 2020)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 176 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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