Meteoritical Bulletin: Entry for Northwest Africa 8651

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Northwest Africa 8651

Basic information

Name: Northwest Africa 8651
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8651
Observed fall: No
Year found: 2014
Country: Mauritania
Mass: 598 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Lunar, granulitic troctolitic breccia
Recommended:			Lunar [explanation]

This is 1 of 106 approved meteorites classified as Lunar. [show all]
Search for other: Lunar meteorites

Comments:

Approved 11 Dec 2014

Writeup

Writeup from MB 103:

Northwest Africa 8651 (NWA 8651)

Mauritania

Found: April 2014

Classification: Lunar, granulitic troctolitic breccia

Physical characteristics: A single, gray-colored stone lacking fusion crust. Small white clasts are visible in a pale, finer grained matrix.

Petrography: Fragments of plagioclase (300 to 500 μm) set in recrystallized matrix of fine-grained (~20 μm) olivine, pigeonite, and plagioclase. Olivine fragments (~100 μm) are less abundant. Plagioclase 60-65 vol%, olivine 20 vol%. Accessory phases include troilite, schreibersite, and FeNi metal.

Geochemistry: Plagioclase, An_95.3±1.1Ab_4.4±0.9Or_0.3±0.2(An_94.4-97.4Ab_2.6-5.2Or_0-0.6, n=7); olivine, Fa_25.6±0.4(Fa_25-26.2, FeO/MnO = 86.1-112.4, n=8); pigeonite, Fs_20.7±1.4Wo_6.7±1.8(Fs_18-22.4Wo_4.4-10.7, FeO/MnO = 50-55.8, n=10).

Classification: Lunar, granulitic troctolitic breccia

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Changsha China
Date:	April 2014
Mass (g):	598
Pieces:	1
Class:	Lunar, granulitic troctolitic breccia
Weathering grade:	low
Fayalite (mol%):	25.6±0.4
Ferrosilite (mol%):	20.7±1.4
Wollastonite (mol%):	6.7±1.8
Classifier:	Wu Y., PMO
Type spec mass (g):	20
Type spec location:	PMO
Main mass:	Ke Zuokai
Comments:	Submitted by Hsu W.

Institutions
and collections

PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Geography:

Mauritania

Coordinates:

Unknown.

Statistics:
This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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Revision
history:

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