Meteoritical Bulletin: Entry for Northwest Africa 13093

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Northwest Africa 13093

Basic information

Name: Northwest Africa 13093
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13093
Observed fall: No
Year found: 2014
Country: Morocco
Mass: 497 g

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 18 Jan 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13093 (NWA 13093)

Morocco

Purchased: 2014 Feb

Classification: Ordinary chondrite (L6)

History: Purchased from a Moroccan dealer in 2014.

Physical characteristics: Physical Characteristics: Almost completely covered by black fusion crust. Interior shows moderate amount of metallic and sulfide flakes. Dark parallel bands run along the length of the interior.

Petrography: (S. Chapin and K. Kingsbury, UAz) Microprobe examination of a polished mount shows a few, barely distinguishable, partly recrystallized chondrules, some up to 500-900 μm in size. Plagioclase grains are large (70-200 μm). Minor oxidization seen along rims of kamacite and troillite. A few small shock veins several mm long are observed. Troilite, merrillite, and chromite are also present.

Geochemistry: Mineral compositions and geochemistry: (S. Chapin and K. Kingsbury, UAz) Olivine Fa_25.4±1.2, n=10; low-Ca pyroxene Fs_20.8±0.3Wo_1.6±0.3, n=10; Kamacite Fe=91.93±0.94, Ni=6.23±0.23, Co=0.96±0.11 wt%, n=3.

Classification: Ordinary Chondrite (L6), weathering grade W2.

Specimens: 31 g and an epoxy probe mount on deposit at UAz. Fredric Stephan holds the main mass.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2014 Feb
Mass (g):	497.1
Pieces:	1
Class:	L6
Weathering grade:	W2
Fayalite (mol%):	25.4±1.2 n=10
Ferrosilite (mol%):	20.8±0.3 n=10
Wollastonite (mol%):	1.6±0.3 n=10
Classifier:	S. Chapin, K. Kingsbury
Type spec mass (g):	31
Type spec location:	UAz
Main mass:	Fredric Stephan
Comments:	Working name SH2.; submitted by T. Swindle

Institutions
and collections

UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012)

Catalogs:

References:

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

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Geography:

Morocco

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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