Meteoritical Bulletin: Entry for Northwest Africa 8305

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Northwest Africa 8305

Basic information

Name: Northwest Africa 8305
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8305
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 895 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	L3
Recommended:			L3 [explanation]

This is 1 of 862 approved meteorites (plus 2 unapproved names) classified as L3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 18 Dec 2015

Writeup

help

Writeup from MB 104:

Northwest Africa 8305 (NWA 8305)

(Northwest Africa)

Purchased: 2013 Dec

Classification: Ordinary chondrite (L3)

History: Purchased by Marcin Cimała in December 2013 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Closely-packed, medium to large sized (0.6-3.3 mm), well-formed chondrules. Minerals are olivine, orthopyroxene, pigeonite), subcalcic augite, sodic plagioclase, troilite, chromite, chlorapatite and altered kamacite.

Geochemistry: Olivine (Fa_3.1-57.9, N = 9; Cr₂O₃ content of ferroan olivine = 0.02-0.12 wt.%, mean 0.07±0.03 wt.%, N = 7), orthopyroxene (Fs_2.7-7.7Wo_0.8-0.9, N = 3), pigeonite (Fs_23.4Wo_12.3), subcalcic augite (Fs_5.6Wo_34.2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.94.

Classification: Ordinary chondrite L3. L group designation based on magnetic susceptibility.

Specimens: 20.3 g including one polished thin section at UWB. The remainder is held by M. Cimała.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2013 Dec
Mass (g):	895
Pieces:	1
Class:	L3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	3.1-57.9
Ferrosilite (mol%):	2.7-7.7
Wollastonite (mol%):	0.8-0.9
Magnetic suscept.:	4.94
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.3
Type spec location:	UWB
Main mass:	M. Cimala
Comments:	MC117; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Piotr gural100
Woreczko Jan & Wadi

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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