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Northwest Africa 1052
Basic information Name: Northwest Africa 1052
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1052
Observed fall: No
Year found: 2001
Country: Morocco
Mass:help 22 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Acapulcoite
MetBase:  v. 7.1  (2006)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 78 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Writeuphelp
Writeup from MB 89:

Northwest Africa 1052

Morocco

Found 2001

Acapulcoite

A stone of 22 g was bought in Erfoud (Morocco) by Matteo Chinellato. Classification and mineralogy (G.Pratesi, V.Moggi-Cecchi, L. Mancini, MSP: petrography and EMPA; G. Sighinolfi and S. Lugli, UMo: EMPA): either thin section and type specimen sample look to be composed by 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, (Fa5.95); orthopyroxene Fs7.60Wo1.44. High Ca-pyroxene (Fs 3.63En 51.1Wo45.3, Al = 1.44 mol %) and plagioclase (An13.7Ab79.9Or6.4) are also common. Apart from silicates, major phases are metal and troilite. Accessory phases include Na- and Ca-Merrillite and magnesiochromite (Cr/(Cr+Al) = 0.91; Fe:Mn:Mg ratios = 0.58:0.09:0.33). 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 1.18 to 1.43 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). Specimens: main mass with buyer (Matteo Chinellato); type specimen (4.7 g) and thin section, MSP.

Data from:
  MB89
  Table 7
  Line 6:
Origin or pseudonym:Morocco
Place of purchase:Erfoud
Date:2001
Mass (g):22
Pieces:1
Class:Acap
Classifier:V. Moggi Cecchi, MSP
Type spec mass (g):4.7
Main mass:Chinellato
Institutions
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 5 Mar 2014)
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 uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Matteo Chinellato   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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