Meteoritical Bulletin: Entry for Northwest Africa 8630

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Northwest Africa 8630

Basic information

Name: Northwest Africa 8630
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8630
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 34 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	LL7
Recommended:			LL7 [explanation]

This is 1 of 100 approved meteorites classified as LL7. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 25 Nov 2014

Writeup

help

Writeup from MB 103:

Northwest Africa 8630 (NWA 8630)

(Northwest Africa)

Purchased: 2012

Classification: Ordinary chondrite (LL7)

History: Purchased in Agadir in 2012

Physical characteristics: A single stone with fusion crust. Cut surface reveals a light gray interior

Petrography: Main minerals are olivine, pyroxene (with typical grain size 100 μm), plagioclase (to 200 μm). The texture is recrystallized with triple junctions and lobate grains. Rare relict chondrules. Plagioclase is found as euhedral grains and as veins between the other silicates. Ca-phosphates to 200 μm. Chromite to 50 μm. Metal as small blebs or elongated grains in the olivine.

Geochemistry: Olivine Fa_32.0±0.4(N=4). Orthopyroxene Fs_26.4±0.2Wo_1.9±0.5(N=3). Plagioclase An_10.4Or_5.1(N=3). Chromite Cr#=0.88. Magnetic susceptibility log χ =3.55 (χ in 10^-9 m³/kg).

Classification: LL7 based on texture, Ca content of orthopyroxene, and plagioclase size. Weathering grade W1.

Specimens: 6.8 g and a polished section in CEREGE. Main mass with Jean Redelsperger

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Agadir
Date:	P 2012
Mass (g):	34
Pieces:	1
Class:	LL7
Weathering grade:	W1
Fayalite (mol%):	32.0±0.4 (N=4)
Ferrosilite (mol%):	26.4±0.2 (N=3)
Wollastonite (mol%):	1.9±0.5
Magnetic suscept.:	3.55
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	6.8
Type spec location:	CEREGE
Main mass:	Jean Redelsperger
Comments:	Submitted by J. Gattacceca

Institutions
and collections

CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)

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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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Allmeteorite.com

Geography:

Coordinates:

Unknown.

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

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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