Meteoritical Bulletin: Entry for Northwest Africa 15821

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Northwest Africa 15821

Basic information

Name: Northwest Africa 15821
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15821
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 278 g

Classification
history:

Meteoritical Bulletin:	MB 112	(2024)	Iron, ungrouped
Recommended:			Iron, ungrouped [explanation]

This is 1 of 157 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped. [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons

Comments:

Approved 25 Jun 2023

Writeup

Writeup from MB 112:

Northwest Africa 15821 (NWA 15821)

(Northwest Africa)

Purchased: 2022 Feb

Classification: Iron meteorite (ungrouped)

Petrography: (Jérôme Gattacceca, Maeva Darnault, Florian Dumas, CEREGE) Recrystallized iron meteorite with no visible Widmanstätten patterns. Kamacite grains have typical size 1.2 mm, and lobate contours. Neumann bands are present. Contains dark and net plessite. Schreibersite and troilite to 200 µm.

Geochemistry: Composition: Ni 8.20 wt% (XRF analyses). Trace elements Co 5.47 mg/g, Ga 61.0 µg/g, As 12.0 µg/g, Ir 1.57 µg/g, Au 1.18 µg/g, Cu 225.3 µg/g, Cr 64.5 µg/g. Ge was not measured.

Classification: Iron meteorite (ungrouped). Ungrouped based on the chemical composition that does not fit any known group.

Specimens: Type specimen at CEREGE, main mass with Kuntz.

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Rissani, Morocco
Date:	P 2022 Feb
Mass (g):	278.3
Pieces:	1
Class:	Iron, ungrouped
Weathering grade:	low
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	21.6
Type spec location:	CEREGE
Main mass:	Kuntz
Finder:	anonymous
Comments:	work name K553; 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 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?

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Photos:

Credit	Photos
Public domain photographs:
Jerome Gattacceca

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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