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Northwest Africa 13255
Basic information Name: Northwest Africa 13255
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13255
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 65.2 g
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 510 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 5 Apr 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13255 (NWA 13255)

Morocco

Find: 2019

Classification: HED achondrite (Diogenite)

History: Purchased in August 2019 by Juan Aviles Poblador from a meteorite dealer in Morocco. Later acquired by Daniel Sheikh.

Physical characteristics: Single stone with weathered fusion crust.

Petrography: (D. Sheikh, FSU) This sample is a breccia composed almost entirely of angular and tabular grains of orthopyroxene (Av. 1 mm, up to 3 mm) set in a fine-grained matrix composed of smaller orthopyroxene grains. Accessory phases include Al-bearing chromite, plagioclase, augite, sulfides, and Fe-oxides.

Geochemistry: Orthopyroxene (Fs28.2±0.4Wo4.0±0.3, range Fs27.5-29.0Wo3.0-4.5, FeO/MnO=28±3, n=30), Augite (Fs14.0±1.3Wo41.9±0.5, range Fs13.1-14.9Wo41.6-42.3, FeO/MnO=25±3, n=2), Plagioclase (An92.2±0.3Or0.2±0.1, range An91.9-92.5Or0.1-0.4, n=4).

Classification: Diogenite (monomict breccia)

Specimens: 65.2 grams at UCLA; main mass with UCLA.

Data from:
  MB109
  Table 0
  Line 0:
Date:2019
Mass (g):65.2
Pieces:1
Class:Diogenite
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):28.2±0.4, 14.0±1.3
Wollastonite (mol%):4.0±0.3, 41.9±0.5
Magnetic suscept.:3.22
Classifier:D. Sheikh, FSU
Type spec mass (g):65.2
Type spec location:UCLA
Main mass:UCLA
Comments:Submitted by Daniel Sheikh
Institutions
   and collections		 UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Photos:
CreditPhotos
Public domain photographs:
Daniel Sheikh   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1967 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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