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Northwest Africa 7284
Basic information Name: Northwest Africa 7284
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7284
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 113.4 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 437 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 23 Jul 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7284 (NWA 7284)

Morocco

Purchased: 2012 Jan 12,

Classification: HED achondrite (Diogenite)

History: Purchased by Sean Tutorow in Morocco, January 12, 2012.

Physical characteristics: Three stones, all complete, smooth, fusion crusted, saw cut reveals fresh, coarse-grained texture, green pyroxene phenocrysts set in a light-yellow groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 90% pyroxene, 5% olivine, 2% plagioclase, minor kamacite. Pyroxenes up to several millimeters, olivine up to 500 μm, significant shock fractures in silicates.

Geochemistry: (C. Agee and N. Wilson, UNM) Low Ca-pyroxene Fs25.0±0.4Wo3.4±0.3, Fe/Mn=31±1 n=13, olivine Fa26.2±0.5, Fe/Mn=48±2, n=6, plagioclase Or0.6±0.1Ab12.8±2.7An86.6±2.8 n=7.

Classification: Achondrite (diogenite). Equilibrated, uniform pyroxene and olivine compositions. Minimal weathering.

Specimens: 20.7 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012 Jan 12,
Mass (g):113.42
Pieces:3
Class:Diogenite
Fayalite (mol%):26.2±0.5
Ferrosilite (mol%):25.0±0.4
Wollastonite (mol%):3.4±0.3
Classifier:C. Agee, UNM
Type spec mass (g):20.7
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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)
Richard Cardial   
Woreczko Jan & Wadi   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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