Meteoritical Bulletin: Entry for Northwest Africa 15511

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Northwest Africa 15511

Basic information

Name: Northwest Africa 15511
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15511
Observed fall: No
Year found: 2014
Country: Morocco
Mass: 347 g

Classification
history:

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

This is 1 of 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 7 Jan 2023

Writeup

help

Writeup from MB 112:

Northwest Africa 15511 (NWA 15511)

Morocco

Find: 2014

Classification: HED achondrite (Eucrite, polymict)

History: This meteorite was purchased by Luc Labenne in Agadir, Morocco, from a Moroccan dealer.

Petrography: (T. Shisseh, R. Hewins, B. Zanda, E. Jacquet, S. Pont, H. Chennaoui Aoudjehane, FSAC, MNHNP) Brecciated rock with lithic clasts and mineral fragments set in a fine-grained fragmental matrix. The clasts exhibit subophitic, ophitic, variolitic and granulitic textures, and have sizes ranging from 1 to 4 mm. The main mineral phases are pyroxene and plagioclase. Accessory phases are silica and oxides (spinels and ilmenite). Both equilibrated and zoned (unequilibrated) pyroxenes are present. Augite lamellae in equilibrated pyroxene are up to 30 µm in thickness. The size of plagioclase laths in subophitic and ophitic clasts ranges from 0.3 to 2 mm.

Geochemistry: (T. Shisseh, R. Hewins, FSAC, MNHNP) Low-Ca pyroxene composition is En₄₃Fs₅₅Wo₂(Fe/Mn=31.5; Mg# =44; n=1) and En_36±0.1Fs_58±4.5Wo_6±4.3(Fe/Mn=34±1; Mg# =38; n=2). High-Ca pyroxene is s En₃₀Fs₃₅Wo₃₅(n=1). Plagioclase is An_85-90.6Or_0.2-0.5(n=3).

Classification: (T. Shisseh, R. Hewins, FSAC, MNHNP) Polymict eucrite. This rock contains basaltic clasts and mineral fragments with various compositions.

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Agadir, Morocco
Date:	2014
Mass (g):	347
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	high
Weathering grade:	moderate
Ferrosilite (mol%):	55; 58±4.5 (n=2)
Wollastonite (mol%):	2; 6±4.3
Classifier:	T. Shisseh, FSAC; R. Hewins, B. Zanda, MNHNP
Type spec mass (g):	20.05
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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