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Northwest Africa 1054
Basic information Name: Northwest Africa 1054
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1054
Observed fall: No
Year found: 2001
Country: Morocco
Mass:help 86 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Acapulcoite
MetBase:  v. 7.1  (2006)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 91 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Writeuphelp
Writeup from MB 89:

Northwest Africa 1054

Morocco

Found 2001

Acapulcoite

A stone of 86 g was bought in Erfoud (Morocco) by an anonymous dealer. Classification and mineralogy (G.Pratesi, V.Moggi-Cecchi, L. Mancini, MSP: petrography and EMPA; G. Sighinolfi and S. Lugli, UMo: EMPA): composed of a fine-grained aggregate. In thin section it displays an granular texture with grains mainly represented by olivine, pyroxene, Fe,Ni alloy and troilite and ranging from 200 to 700 µm in dimensions. Olivine is homogeneous and has a typical forsteritic composition, (Fa6.4); orthopyroxene is bronzitic (Fs7.8Wo1.3). High Ca-pyroxene (Fs3.3En51.2Wo45.4, Al = 1.50 mol %) and plagioclase (An14.3Ab79.5Or6.3) are also common. Apart from silicates, major phases are metal and troilite. Accessory phases include Na-Merrillite and magnesiochromite (Cr/(Cr+Al) = 0.96; Fe:Mn:Mg ratios = 0.60:0.12:0.28). This meteorite shows a recrystallization texture with abundant 120° triple junctions and  many interstices filled with metal. Based on texture (fine grained), mineralogy and chemistry (Cr content of diopside varying from 1.17 to 1.35 wt. %) the meteorite is classified as an acapulcoite. Terrestrial weathering grade is rather low (W1); optical features (sharp extinction of olivine) indicate that the sample is very weakly or not shocked (S1). The meteorite may be paired with NWA 1052. Specimens: main mass with buyer; type specimen (17.9 g) and thin section, MSP.

Data from:
  MB89
  Table 7
  Line 7:
Origin or pseudonym:Morocco
Place of purchase:Erfoud
Date:2001
Mass (g):86
Pieces:1
Class:Acap
Classifier:V. Moggi Cecchi, MSP
Type spec mass (g):17.9
Institutions
   and collections		 MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
UMo: Department of Earth Sciences, Universiy of Modena, Modena, Italy (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
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Photos:   
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Matteo Chinellato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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