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Northwest Africa 4561
Basic information Name: Northwest Africa 4561
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4561
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 200 kg
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  EL3
Recommended:  EL-melt rock    [explanation]

This is 1 of 25 approved meteorites classified as EL-melt rock.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites
Comments: Approved 4 May 2008
Revised 1 Sep 2019: Reclassified by Rubin (2016)
Writeuphelp
Writeup from MB 108:
Northwest Africa 4561: reclassification

Rubin (2016) reclassified Al Haggounia 001 and paired specimens as "vesicular, incompletely melted, EL chondrite impact melt rock[s]." NWA 4561 is likely paired, and is therefore also reclassified.
Bibliography:
  • Rubin A.E. (2016) Impact melting of the largest known enstatite meteorite: Al Haggounia 001, a fossil EL chondrite. Meteorit. Planet. Sci. 51 1576-1587. (link)
Data from:
  MB94
  Table 2
  Line 44:
State/Prov/County:Erfoud, Morocco
Date:2006
Mass (g):> 200 kg
Pieces:Many
Class:EL3
Shock stage:moderate
Weathering grade:extensive
Ferrosilite (mol%):<2
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):27
Type spec location:NAU
Comments:An16.8Or 4.2: paired with NWA 2828:Si = 0.6–0.95 wt%
Institutions
   and collections		 NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Polandmet      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann   
METEORITICON   
Wojciech Moscinski   
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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