Meteoritical Bulletin: Entry for Northwest Africa 15512

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Northwest Africa 15512

Basic information

Name: Northwest Africa 15512
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15512
Observed fall: No
Year found: 2013
Country: Morocco
Mass: 9.1 g

Classification
history:

Meteoritical Bulletin:	MB 112	(2023)	Eucrite-mmict
Recommended:			Eucrite-mmict [explanation]

This is 1 of 280 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 7 Jan 2023

Writeup

help

Writeup from MB 112:

Northwest Africa 15512 (NWA 15512)

Morocco

Find: 2013

Classification: HED achondrite (Eucrite, monomict)

History: This meteorite was purchased by Luc Labenne in Erfoud, Morocco, from an anonymous Moroccan dealer.

Petrography: (T. Shisseh, R. Hewins, B. Zanda, E. Jacquet, H. Chennaoui Aoudjehane, S. Pont, FSAC, MNHNP) A brecciated rock with subophitic, ophitic and granulitic clasts embedded in a recrystallized matrix. Glassy shock veins (30 µm in thickness) are crossing the clasts and the matrix. Plagioclase laths are 1.5 mm long, and contain inclusions of pyroxene and silica. Plagioclase in the recrystallized matrix displays 120° triple junctions and curved margins, and ranges from 60 to 200 µm in size. Pigeonite contains augite lamellae up to 55 µm in thickness. Several pigeonite grains exhibit remnant Ca-zoning. Minor mineral phases are silica, ilmenite, and troilite.

Geochemistry: (T. Shisseh, R. Hewins, FSAC, MNHNP) Low-Ca pyroxene is En_36±0.7Fs_57.3±2.8Wo_6.7±3.5(Fe/Mn=30.5; Mg# =39; n=3). High-Ca pyroxene is En_32.5±1Fs_38±5.5Wo_29.5±6.3(n=28). Plagioclase is An_85-89Ab_10-13(n=2). Ilmenite contains 53.9 wt% FeO and 44.8 wt% TiO₂ (n=1).

Classification: (T. Shisseh, R. Hewins, FSAC, MNHNP) Monomict eucrite. This meteorite contains anorthite, and pyroxene with Fe/Mn ratios matching eucrites, plus typical eucritic textures.

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	2013
Mass (g):	9.1
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	moderate
Weathering grade:	moderate
Ferrosilite (mol%):	57.3±2.8 (n=3)
Wollastonite (mol%):	6.7±3.5
Classifier:	T. Shisseh, FSAC; R. Hewins, B. Zanda, MNHNP
Type spec mass (g):	2.17
Type spec location:	MNHNP
Main mass:	Luc Labenne meteorites
Comments:	Submitted by T. Shisseh

Institutions
and collections

MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
FSAC: Universite Hassan II Casablanca, Faculte des Sciences Ain Chock, Departement de Géologie, BP 5366 Maârif, Casablanca, Morocco (institutional address; updated 9 Jan 2013)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 112, in preparation (2023)

Find references in NASA ADS:
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Photos:

Credit	Photos
Public domain photographs:
Shisseh Taha

Geography:

Morocco

Morocco

Coordinates:

Unknown.

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

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Revision
history:

This lists important revisions made to data for this record.

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