Meteoritical Bulletin: Entry for Northwest Africa 12697

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Northwest Africa 12697

Basic information

Name: Northwest Africa 12697
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12697
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 140 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 4 Jul 2019

Writeup

Writeup from MB 108:

Northwest Africa 12697 (NWA 12697)

(Northwest Africa)

Purchased: 2018 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased from a mineral dealer in Marrakech, Morocco. Purportedly found near Tindouf, Algeria.

Petrography: (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments (olivine, pyroxene, plagioclase) and lithic clasts (anorthosites, melt rocks, basalt), set in a nearly black matrix of fine-grained related debris. Intermingled are clast-rich melt particles with ill-defined outlines. Pyroxenes with and without exsolution lamellae are observed. Accessories are Fe,Ni metal, ilmenite, and troilite.

Geochemistry: Mineral compositions and geochemistry: Olivine: Fa_35.4±8.0(24.5-50.5); Fe/Mn (at.): 88-116; n=7. Pyroxene Fs_35.3±11.8Wo_12.3±5.9(Fs_22.3-53.0Wo_3.9-21.8); Fe/Mn (at.): 44-87; n=11. Plagioclase An_95.7±2.3(An_91.0-98.8); n=8.

Classification: Lunar feldspathic breccia

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Marrakech, Morocco
Date:	P 2018 Jun
Mass (g):	140
Pieces:	Many
Class:	Lunar (feldsp. breccia)
Shock stage:	High
Weathering grade:	Low
Fayalite (mol%):	35.4±8.0
Ferrosilite (mol%):	35.3±11.8
Wollastonite (mol%):	12.3±5.9
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP, Munster
Main mass:	Stephan Decker, Meteorite Museum, Oberwesel, Germany
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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