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Northwest Africa 1827
Basic information Name: Northwest Africa 1827
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1827
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 877 g
Classification
  history:
Meteoritical Bulletin:  MB 88  (2004)  Mesosiderite-C
MetBase:  v. 7.1  (2006)  Mesosiderite-C
Recommended:  Mesosiderite-C    [explanation]

This is 1 of 7 approved meteorites classified as Mesosiderite-C.   [show all]
Search for other: Class C mesosiderites, Metal-rich meteorites, and Mesosiderites
Writeuphelp
Writeup from MB 88:

 Northwest Africa 1827

Morocco

Purchased 2003 June

Mesosiderite

A complete stony-iron meteorite (877 g) was purchased in Rissani by a Moroccan dealer for N. Oakes (Oakes) in 2003 June.  Classification and mineralogy (A. Irving and S. Kuehner, UWS and T. Bunch, NAU): Igneous texture, mostly medium-grained but with some large mineral clasts of orthopyroxene and plagioclase (commonly surrounded by metal-rich areas).  Predominantly orthopyroxene with about 10 vol% metal (5 wt% Ni), troilite, chromite, merrillite, and sparse, large anorthite clasts (An90.5Ab91Or0.4 to An95.1Ab4.6Or0.2).  Large orthopyroxene clasts are more magnesian (Fs16.2Wo0.8, FeO/MnO = 34.8) than the predominant medium-sized orthopyroxene grains (Fs22.5Wo2.1 to Fs27.3Wo2.2, FeO/MnO = 29.7-32.7).  Small elongate grains of a secondary Ca-Fe-rich phosphate mineral occur along fractures in merrillite grains, and probably are of terrestrial origin.  Although this sample resembles a “metal-rich diogenite” rather than a mesosiderite, comparative studies by T. Bunch (NAU) of this sample, NWA 1879 and similar material provided by A. Jambon (UPVI) and M. Farmer (Farmer) have demonstrated that all (with an estimated total weight of over 22 kg) are part of a large, heterogenous mesosiderite (tentatively assigned to class C) containing sparse eucritic and diogenitic clasts (Bunch et al., 2004).  Specimens: type specimen, 20 g, UWS, 1 g and one polished thin section, NAU; main mass, Oakes.

Data from:
  MB88
  Table 4
  Line 40:
Place of purchase:Rissani
Date:P Jun 2003
Mass (g):877
Pieces:1
Class:Mes
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:20g UWS and 1g ASU
Main mass:Oakes
Institutions
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Farmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Matteo Chinellato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
David Hardy   
jean bernard Delbauve   
Jim K      
METEORITES AUSTRALIA   
Michel Girard   
tett   
Volker Heinrich   
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5322 approved meteorites from (Northwest Africa) (plus 2131 unapproved names)

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