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Northwest Africa 2520
Basic information Name: Northwest Africa 2520
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2520
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 75.5 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  LL3
MetBase:  v. 7.1  (2006)  LL3.7
Recommended:  LL3.7    [explanation]

This is 1 of 29 approved meteorites classified as LL3.7.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from MB 89:

Northwest Africa 2520

Algeria

Found 2004

Ordinary chondrite LL3

One partially crusted stone, weighing 75.5 g, was purchased in Erfoud in September 2004. Classification and mineralogy (M. Bourot-Denise, MNHNP): brecciated; major part has abundant, large chondrules (>500µm), with entirely devitrified mesostasis (diopside and plagioclase, An12.3); several more or less melted clasts, in which the chondritic texture has been erased and opaques make up pervasive fine blebs in silicates. Olivine, Fa0.9-32.3, mean Fa25.0±7.7, FeO-poor chondrule olivines are zoned; pyroxene, Fs3.5-33.7, mean Fs18.2±8.9. Magnetic susceptibility  3.66 (J. Gattacceca, CEREGE, Aix en Provence). Estimated subtype 3.6-3.7 (from FeO zoning in olivine); estimated shock stage S4/S5; weathering grade W4 (metal and sulfide much altered). Specimens: type specimen 15.8 g and one polished mount, MNHNP; main mass with PThomas.

Data from:
  MB89
  Table 7
  Line 308:
Place of purchase:Erfoud
Date:1 Sep 2004
Mass (g):75.53
Pieces:1
Class:LL3
Shock stage:S4/5
Weathering grade:W4
Fayalite (mol%):0.9-32.3 (25.8±7.7)
Ferrosilite (mol%):3.5-27.7 (18.2±8.9)
Classifier:M. Bourot-Denise, MNHNP
Type spec mass (g):15.8
Main mass:Thomas
Comments:see separate entry, est. subtype 3.6/3.7
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
PThomas: Philippe Thomas, Meteoritica, La Chave, 07690 St André en Vivarais, France (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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