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Northwest Africa 8553
Basic information Name: Northwest Africa 8553
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8553
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 78.2 g
Meteoritical Bulletin:  MB 103  (2014)  EL6
Recommended:  EL6    [explanation]

This is 1 of 124 approved meteorites classified as EL6.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 18 Oct 2014
Writeup from MB 103:

Northwest Africa 8553 (NWA 8553)

(Northwest Africa)

Purchased: 2013

Classification: Enstatite chondrite (EL6)

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, April, 2013.

Physical characteristics: Single stone. Weathered brown exterior. Saw cut reveals brown fine-grained matrix, opaques visible, silicate grains show preferred alignment or fabric.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows silicates: 90% enstatite and 10% plagioclase; no chondrules observed in the microprobe section, ubiquitous kamacite, Fe-oxide, Fe-sulfide, Fe,Cr-sulfide, many Fe-oxide veinlets.

Geochemistry: (C. Agee and N. Muttik, UNM) Enstatite Fs0.2±0.1Wo1.7±0.1, n=9; plagioclase Ab80.2±1.1An16.0±1.5Or3.8±0.6, n=8; alkali-feldspar Ab35.0An1.7Or63.3, n-1; kamacite Si=1.2±0.1, Ni=5.0±0.6 (wt%), n=5.

Classification: Enstatite chondrite (EL6), weathering grade W2.

Specimens: 18.0 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):78.2
Weathering grade:W2
Ferrosilite (mol%):0.2
Classifier:C. Agee, UNM
Type spec mass (g):18.0
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G563; submitted by C. Agee, UNM
   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)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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