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Northwest Africa 13611
Basic information Name: Northwest Africa 13611
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13611
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 390 g
Recommended:  L5    [explanation]

This is 1 of 7227 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Apr 2021
Writeup from MB 110:

Northwest Africa 13611 (NWA 13611)

(Northwest Africa)

Purchased: 2019 Jun

Classification: Ordinary chondrite (L5)

History: A single stone weighing 390 g was found by an anonymous finder in Western Sahara and purchased in June 2019 at the Erfoud Market by Giovanni Pratesi for the Earth Sciences Dept of Unifi.

Physical characteristics: The main mass is partially covered by brown, stained fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, I. Vanni, UniFi): The thin section displays an equilibrated chondritic texture, with various chondrule types (PP, PO and BO) set in a fine grained matrix. Both olivine and orthopyroxene are homogeneous. 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, I. Vanni, UniFi); Olivine in both chondrules and matrix (Fa24.3±0.4Fo75.7±1.1; n=7); low-Ca pyroxene in both chondrules and matrix (Fs21.4±1.1En77.6±1.1Wo1.0±0.4; n=8);

Classification: Ordinary Chondrite (L5); S2; W2;

Specimens: The main mass, weighing 390 g, the type specimen, weighing 21 g , and one thin section are on deposit at MSN-FI (Inventory # I-3580).

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2019 Jun
Mass (g):390
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):24.3±0.4 (N=20)
Ferrosilite (mol%):21.4±0.9 (N=7)
Wollastonite (mol%):1.7±0.1
Classifier:Vanni Moggi Cecchi
Type spec mass (g):21
Type spec location:MSN-FI
Main mass:MSN-FI
Comments:Prov.NWA13611;Field MOR4;Inv.I-3580; submitted by Vanni Moggi Cecchi
   and collections
MSN-FI: MUSEO DI STORIA NATURALE DELL'UNIVERSITA' DEGLI STUDI DI FIRENZE Via Giorgio La Pira, 4 – 50121 FIRENZE, Italy; Website (institutional address; updated 14 Jan 2015)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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