Meteoritical Bulletin: Entry for Northwest Africa 13712

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Northwest Africa 13712

Basic information

Name: Northwest Africa 13712
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13712
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 198.5 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 545 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 20 Mar 2021

Writeup

Writeup from MB 110:

Northwest Africa 13712 (NWA 13712)

(Northwest Africa)

Purchased: October 2020

Classification: HED achondrite (Diogenite)

Physical characteristics: Two fragments, one with fusion crust. Cut face reveals a light grey interior with darker mm sized clasts.

Petrography: (J. Gattacceca, CEREGE) Brecciated igneous rock with angular mineral clasts (to 4 mm) set in a clastic matrix. Main minerals are Ca-pyroxenes (some zoned, some exsolved). Other minerals: plagioclase, chromite (to 600 µm), troilite, metal (in the matrix, or as µm blebs and veins in the pyroxenes).

Geochemistry: Low-Ca pyroxene Fs_27.5±4.7Wo_2.6±0.9, range Fs_17.4-34.8Wo_0.5-4.0, FeO/MnO = 32.5±1.64 (n=13). Plagioclase An_86.0±4.2Ab_13.3±4.0Or_0.7±0.3(n=9). Chromite Cr# = 0.76 (n=2).

Classification: Achondrite (diogenite, brecciated)

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P Oct 2020
Mass (g):	198.5
Pieces:	2
Class:	Diogenite
Weathering grade:	low
Ferrosilite (mol%):	27.5±4.7 (n=13)
Wollastonite (mol%):	2.6±0.9
Magnetic suscept.:	3.26
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	22.17
Type spec location:	CEREGE
Main mass:	Kuntz
Finder:	anonymous
Comments:	work name K507; 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., 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:

Coordinates:

Unknown.

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

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