Meteoritical Bulletin: Entry for Northwest Africa 10882

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Northwest Africa 10882

Basic information

Name: Northwest Africa 10882
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10882
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 4 kg

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Mesosiderite-A2
Recommended:			Mesosiderite-A2 [explanation]

This is 1 of 5 approved meteorites classified as Mesosiderite-A2. [show all]
Search for other: Class A mesosiderites, Mesosiderites, and Metal-rich meteorites

Comments:

Approved 21 Nov 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10882 (NWA 10882)

(Northwest Africa)

Purchased: 2016

Classification: Mesosiderite (group A2)

History: Purchased by Steve Arnold in May 2106 from a meteorite dealer in Morocco.

Physical characteristics: Single mass. Saw cut shows a stony-iron breccia with silicate clasts up to ~1 cm, metal veins and nodules up to ~1 cm, however many domains are fine-grained mixtures of metal and silicate.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately a 50-50 mix of metal/sulfide and silicate. Most silicate clasts have pyroxene and plagioclase present, and are approximately 70% "basaltic" pyroxenes (pigeonite and augite) and 30% anorthitic plagioclase. The dominant metal phase is kamacite (~90%), with inclusions of taenite (~10%).

Geochemistry: (C. Agee and M. Spilde, UNM) Pigeonite Fs_46.2±6.7Wo_11.1±4.8, Fe/Mn=31±3, n=8; augite Fs_28.7±0.6Wo_36.9±0.3, Fe/Mn=30±1, n=2; plagioclase An_93.3, n=7.

Classification: Mesosiderite-A2. "A" based on plagioclase abundance, basaltic clast abundance, and pyroxene compositions; "2" based on moderate recrystallization of breccia clasts.

Specimens: 20.4 g including a probe mount on deposit at UNM, Steve Arnold holds the main mass

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016
Mass (g):	4 kg
Pieces:	1
Class:	Mesosiderite-A2
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	46.2±6.7, 28.7±0.6
Wollastonite (mol%):	11.1±4.8, 36.9±0.3
Classifier:	C. Agee, UNM
Type spec mass (g):	20.4
Type spec location:	UNM
Main mass:	Steve Arnold
Comments:	Submitted by C. Agee

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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