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 22 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 Meteoritical Bulletin, no. 110, in preparation (2021)

Find references in NASA ADS:
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Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1871 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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