Meteoritical Bulletin: Entry for Northwest Africa 13275

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Northwest Africa 13275

Basic information

Name: Northwest Africa 13275
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13275
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 3.88 kg

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	L6
Recommended:			L6 [explanation]

This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 21 Mar 2020

Writeup

Writeup from MB 109:

Northwest Africa 13275 (NWA 13275)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Ordinary chondrite (L6)

History: Purchased by Grant Harkness in October 2019 from a dealer in Zagora, Morocco, and later sold to Patrick Brown.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Extensively recrystallized specimen with rare remnant partial chondrules and stained metal grains.

Geochemistry: Olivine (Fa_24.9±0.6, range Fa_24.0-25.6, N = 7), low-Ca pyroxene (Fs_20.7±0.2Wo_1.5±0.2, range Fs_20.4-21.0Wo_1.1-1.8, N = 5), augite (Fs_8.6±0.9Wo_43.8±0.9, range Fs_7.7-9.5Wo_43.0-44.8, N = 3).

Classification: Ordinary chondrite (L6).

Specimens: 53.95 g including one polished thin section at PSF; main mass plus one polished thin section with Mr. P. Brown.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2019 Oct
Mass (g):	3880
Pieces:	1
Class:	L6
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	24.9±0.6
Ferrosilite (mol%):	20.7±0.2
Wollastonite (mol%):	1.5±0.2
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	29.9
Type spec location:	PSF
Main mass:	P. Brown
Comments:	Work name HC20; 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: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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