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Northwest Africa 15571
Basic information Name: Northwest Africa 15571
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15571
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 176 g
Recommended:  EL5    [explanation]

This is 1 of 10 approved meteorites classified as EL5.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 4 Mar 2023
Writeup from MB 112:

Northwest Africa 15571 (NWA 15571)

(Northwest Africa)

Find: 2018

Classification: Enstatite chondrite (EL5)

History: A single stone weighing 199 g was purchased by Romano Serra at Erfoud in 2018

Physical characteristics: The main mass displays no fusion crust. A cut surface reveals several black veins and a markedly altered brown matrix.

Petrography: (V. Moggi Cecchi, G. Pratesi, L. Fabrizi, UniFi): An equilibrated chondritic texture consisting in a fine-grained, pyroxene-dominant matrix, with minor plagioclase and few relict chondrules visible in the thin section. Metal veins are diffuse. Kamacite and troilite, partially weathered to iron oxides are the main opaque phases. Daubréelite and minor alabandite are occasionally visible in troilite. The presence of alabandite, An content of plagioclase and Si content of kamacite point to a classification as EL chondrite.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, L. Fabrizi, UniFi): Orthopyroxene (Fs0.4±0.1En98.2±0.3Wo1.4±0.1), plagioclase (An15.5Or4.2); Si in kamacite = 0.6 wt.%, Mn in daubreelite = 2.6 wt.%

Classification: Enstatite Chondrite (EL5); S2; W2;

Specimens: The main mass, weighing 176 g, is on deposit at OAM; the type specimen, weighing 32.1 g, and one thin section are on deposit at MSN-FI (Inventory # I-3689).

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Mass (g):176.0
Shock stage:S2
Weathering grade:W2
Ferrosilite (mol%):0.4±0.1 (N=13)
Wollastonite (mol%):1.4±0.1
Classifier:V. Moggi Cecchi, G. Pratesi, L. Fabrizi, UniFi
Type spec mass (g):32.1
Type spec location:MSN-FI
Main mass:Romano Serra
Comments:Inventory # I-3689; submitted by Vanni Moggi Cecchi
   and collections
OAM: Museo del Cielo e della Terra Vicolo Baciadonne 1 40017 San Giovanni in Persiceto ( BO) Italy Osservatorio Astronomico e Museo "Giorgio Abetti", San Giovanni Persiceto, Bologna, Italy; Website (institutional address; updated 31 Oct 2012)
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 Meteoritical Bulletin, no. 112, in preparation (2023)
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Public domain photographs:
Vanni Moggi Cecchi   

     This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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