Meteoritical Bulletin: Entry for Northwest Africa 11767

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Northwest Africa 11767

Basic information

Name: Northwest Africa 11767
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11767
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 15 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	Lunar
Recommended:			Lunar [explanation]

This is 1 of 102 approved meteorites classified as Lunar. [show all]
Search for other: Lunar meteorites

Comments:

Approved 11 May 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 11767 (NWA 11767)

(Northwest Africa)

Purchased: 2012

Classification: Lunar meteorite

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Many small light greenish fragments lacking any fusion crust.

Petrography: Monomict olivine-rich gabbroic breccia predominantly composed of up to 4 mm sized Fe-rich olivine, pigeonite, augite and calcic plagioclase. Minor phases include chromite, troilite and K-feldspar. The meteorite contains abundant shock melt veins along which some olivine has been transformed into ringwoodite.

Geochemistry: olivine: Fa_31.6±0.2(Fa_31.3-32.0, n=13, FeO/MnO=85-105); pigeonite: Fs_25.6±1.1Wo_10.7±2.8(Fs_23.3-27.7Wo_5.9-16.4, n=12, FeO/MnO=46-63); augite: Fs_16.1±1.0Wo_35.7±2.1(Fs_14.8-17.8Wo_32.1-39.0, n=12, FeO/MnO=41-52); calcic plagioclase: An_93.1±0.8(An_91.1-93.9, n=10)

Classification: Lunar Olivine-Gabbros. The meteorite might be paired with NWA 773 and paired stones.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2012
Mass (g):	15
Pieces:	many
Class:	Lunar
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	31.6
Ferrosilite (mol%):	25.6; 16.1
Wollastonite (mol%):	10.7; 35.7
Classifier:	A. Greshake, MNB
Type spec mass (g):	3
Type spec location:	MNB
Main mass:	Stefan Ralew
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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