Meteoritical Bulletin: Entry for Northwest Africa 14778

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Northwest Africa 14778

Basic information

Name: Northwest Africa 14778
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14778
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 509 g

Classification
history:

Recommended:

L3 [explanation]

This is 1 of 789 approved meteorites (plus 1 unapproved name) classified as L3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 19 Mar 2022

Writeup

Writeup from MB 111:

Northwest Africa 14778 (NWA 14778)

(Northwest Africa)

Purchased: 2021 Jun

Classification: Ordinary chondrite (L3)

History: Purchased by Jason Whitcomb in June 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, unequilibrated chondrules containing devitrified glass are set in a fine grained matrix containing altered kamacite, troilite and chromite.

Geochemistry: Olivine (Fa_20.7±9.0, range Fa_2.7-28.5, N = 9; Cr₂O₃ in ferroan olivine 0.02-0.22 wt.%, mean 0.10 wt.%, sd 0.07 wt.%, N = 7), low-Ca pyroxene (Fs_19.2±11.2Wo_2.3±1.8, range Fs_2.8-34.8Wo_0.5-5.0, N = 7). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.37.

Classification: Ordinary chondrite (L3).

Specimens: 21.35 g including one polished thick section at PSF; remainder with Mr. J. Whitcomb.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021 Jun
Mass (g):	509
Pieces:	1
Class:	L3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	20.7±9.0
Ferrosilite (mol%):	19.2±11.2
Wollastonite (mol%):	2.3±1.8
Magnetic suscept.:	4.37
Classifier:	(A. Irving, UWS and J. Boesenberg, BrownU)
Type spec mass (g):	21.35
Type spec location:	PSF
Main mass:	J. Whitcomb
Comments:	Work name JW-47; submitted by A. Irving

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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