![]() |
||
|
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: ![]() | ||||||||||||||||
Classification history: |
This is 1 of 91 approved meteorites classified as Acapulcoite. [show all] Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites | ||||||||||||||||
Writeup![]() |
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: |
|
||||||||||||||||
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)
| ||||||||||||||||
Photos: |
| ||||||||||||||||
Geography:![]() |
Statistics: This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater) |