Meteoritical Bulletin: Entry for Northwest Africa 13883

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Northwest Africa 13883

Basic information

Name: Northwest Africa 13883
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13883
Observed fall: No
Year found: 2019
Country: Morocco
Mass: 3.5 kg

Classification
history:

Recommended:

H4-an [explanation]

This is 1 of 23 approved meteorites classified as H4-an. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 6 May 2021

Writeup

Writeup from MB 110:

Northwest Africa 13883 (NWA 13883)

Morocco

Purchased: 2019 Jun

Classification: Ordinary chondrite (H4, anomalous)

Physical characteristics: Dark brown stone. Cut face reveal a dark interior with metal.

Petrography: (J. Gattacceca, CEREGE) Chondrite with well-delineated chondrules (average apparent diameter 510±250 µm, n=19) . Opaque minerals are metal and troilite.

Geochemistry: Olivine Fa_14.0±0.2, range Fa_13.7-14.3(n=8). Low-Ca pyroxene Fs_15.9±4.5Wo_1.1±0.5, range Fs_12.6-26.8(n=9).

Classification: Ordinary chondrite (H4-anomalous). The anomalous designation is based on the low Fa content of olivine. Out of 5362 equilibrated H chondrites (excluding Antarctic meteorites whose Fa content used to be estimated using oil immersion), only 6 (about 1‰) have a lower Fa content in olivine (Chug Chug 019 H4-an with Fa_10.2, SaU 164 H6 Fa_10.2, NWA 1608 H4-6 Fa₁₁,8, NWA 455 H4 Fa_12.5, NWA 4992 H4 Fa_13.7, SaU 598 H4-an Fa_14.0).

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2019 Jun
Mass (g):	3501
Pieces:	1
Class:	H4-an
Weathering grade:	W1
Fayalite (mol%):	14.0±0.2 (n=8)
Ferrosilite (mol%):	15.9±4.2 (n=9)
Wollastonite (mol%):	1.1±0.5
Magnetic suscept.:	5.25
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	105
Type spec location:	CEREGE
Main mass:	Mehdi Zarrabi
Finder:	anonymous
Comments:	work name MZ64; submitted by Jérôme 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 29 Oct 2018)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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