Meteoritical Bulletin: Entry for Northwest Africa 8403

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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: 11.77 kg

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	EL6
Recommended:			EL6 [explanation]

This is 1 of 133 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

help

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 Fs_0.5±0.1Wo_1.4±0.0, n=8; plagioclase Ab_80.2±0.3An_15.3±0.4Or_4.5±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:
  MB103
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2014
Mass (g):	11770
Pieces:	1
Class:	EL6
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

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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)

Catalogs:

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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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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