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Northwest Africa 7447
Basic information Name: Northwest Africa 7447
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7447
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 170 g
Meteoritical Bulletin:  MB 101  (2012)  EL5
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 8 Nov 2012
Writeup from MB 101:

Northwest Africa 7447 (NWA 7447)

(Northwest Africa)

Purchased: 2007

Classification: Enstatite chondrite (EL5)

History: Purchased by Romano Serra at the Bologna Mineral Show at the Erfoud market, Morocco.

Physical characteristics: Single fragment without fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP); The thin section displays a few chondrules set in a fine-grained matrix, dominated by pyroxene, with minor plagioclase. Chondrules are still distinguishable and range from 0.5 to 0.9 mm in diameter and are mainly RP type, with minor PP. Opaque phases are mainly kamacite and troilite, almost completely weathered to iron oxides. Accessory phases are daubreelite and rare alabandite spots. The presence of alabandite, An content of plagioclase, Mn content of daubreelite and Si content of kamacite point to a classification as EL chondrite. The presence of distinct chondrules suggests a petrologic type 5.

Geochemistry: Orthopyroxene Fs0.1Wo1.4, plagioclase (An15.5Or3.9); Si in kamacite = 1.8 wt.%, Mn in Daubreelite = 2.6 wt.%.

Classification: Enstatite chondrite (EL5); S2; W1

Specimens: A total of 20.3 g specimen and one thin section is on deposit at MSP (MSP 5195). The main mass is in deposit at OAM.

Data from:
  Table 0
  Line 0:
Place of purchase:Bologna Mineral Show
Date:P 2007
Mass (g):170.00
Shock stage:S2
Weathering grade:W1
Ferrosilite (mol%):0.04
Wollastonite (mol%):1.4
Classifier:V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP
Type spec mass (g):20.32
Type spec location:MSP
Main mass:OAM
Comments:Inv. # MSP 5195; submitted by Vanni Moggi Cecchi
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
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)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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