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Northwest Africa 13609
Basic information Name: Northwest Africa 13609
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13609
Observed fall: No
Year found: 2019
Country: Mauritania
Mass:help 41.6 g
Recommended:  L3    [explanation]

This is 1 of 811 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 5 Dec 2021
Writeup from MB 110:

Northwest Africa 13609 (NWA 13609)

Mauritania, (Northwest Africa)

Find: 2019

Classification: Ordinary chondrite (L3)

History: A single stone weighing 42 g was found by an anonymous finder in Western Sahara and purchased in 2019 at the Bologna Mineral Fair by Lucian Cojocaru.

Physical characteristics: The main mass, with several cracks and markedly stained, displays no fusion crust.

Petrography: (V. Moggi Cecchi, L. Fabrizi, G. Pratesi, UniFi): The thin section displays a well-defined chondritic texture, with various chondrule types (PP, PO and BO) set in a fine grained matrix. Both olivine and orthopyroxene are rather inhomogeneous. Iron oxides, Fe-Ni alloys and troilite are the main opaque phases and can be found as individual grains scattared in the matrix or rimming chondrules.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi UniFi); Olivine in both chondrules and matrix (Fa24.9±4.7Fo75.1±3.9; n=56; Fe/Mn = 43.8); low-Ca pyroxene in both chondrules and matrix (Fs17.2±4.2En81.6±3.3Wo0.7±0.2; n=47; Fe/Mn = 23.0).

Classification: Ordinary Chondrite (L3); S1; W2

Specimens: Lucian Cojocaru owns the main mass, weighing 41.6 g; the type specimen, weighing 10.0 g, and one thin section are on deposit at MSN-FI (Inventory # I-3625)

Data from:
  Table 0
  Line 0:
Place of purchase:Bologna Mineral Fair
Mass (g):41.6
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):24.9±4.7 (N=56)
Ferrosilite (mol%):16.5±2.4 (N=35)
Wollastonite (mol%):0.7±0.2
Classifier:V. Moggi Cecchi, L. Fabrizi
Type spec mass (g):10.0
Type spec location:MSN-FI
Main mass:Lucian Cojocaru
Comments:Provisional name NWA 13610; Inventory # I-3625; submitted by Vanni Moggi Cecchi
   and collections
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
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 193 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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