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Northwest Africa 8403
Basic information Name: Northwest Africa 8403
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8403
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 11.77 kg
Meteoritical Bulletin:  MB 103  (2014)  EL6
Recommended:  EL6    [explanation]

This is 1 of 130 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 29 May 2014
Writeup from MB 103:

Northwest Africa 8403 (NWA 8403)

(Northwest Africa)

Purchased: 2014

Classification: Enstatite chondrite (EL6)

History: Purchased from S. Haddany in Tucson in Feb 2014

Physical characteristics: Single stone with weathered brown exterior. Saw cut reveals brown to light brown fine-grained matrix with oxide veins, rare mm-sized chondrules.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows silicates: 95% enstatite and 5% plagioclase; no chondrules observed in the microprobe section. Kamacite, daubreelite, troilite, djerfisherite, and abundant iron-oxide veins present.

Geochemistry: (C. Agee and N. Muttik, UNM) Enstatite Fs0.5±0.1Wo1.4±0.0, n=8; plagioclase Ab80.2±0.3An15.3±0.4Or4.5±0.3, n=7; kamacite Si=0.98±0.11, Ni=5.53±0.56, Co=0.39±0.04 (wt%), n=3; daubreelite Cr=35.04±0.18, Fe=17.98±0.14, Mn=1.57±0.10, S=42.88±0.30 (wt%), n=4.

Classification: Enstatite chondrite (EL6), weathering grade W3.

Specimens: 30.5 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2014
Mass (g):11770
Weathering grade:W3
Ferrosilite (mol%):0.5±0.1
Wollastonite (mol%):1.4±0.0
Classifier:C. Agee, UNM
Type spec mass (g):30.5
Type spec location:UNM
Main mass:D. Pitt
Comments:Field name MAC EL6; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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