Meteoritical Bulletin: Entry for Northwest Africa 10598

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Northwest Africa 10598

Basic information

Name: Northwest Africa 10598
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10598
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 850 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	LL3.15
Recommended:			LL3.15 [explanation]

This is 1 of 23 approved meteorites classified as LL3.15. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 11 Apr 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10598 (NWA 10598)

(Northwest Africa)

Purchased: 2016

Classification: Ordinary chondrite (LL3.15)

History: Purchased by Morten Bilet, January 2016 from a Moroccan meteorite dealer.

Physical characteristics: Single stone with weathered exterior. Saw cuts shows many densely packed chondrules set in a brown matrix, some chondrules up to 5 mm in diameter.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, most with mesostasis or glass. Abundant opaque matrix. Apparent mean chondrule diameter 650±450 μm, n=22.

Geochemistry: (C. Agee and M. Spilde, UNM) Chondrule olivine Fa_17.0±9.4, Cr₂O₃=0.22±0.08 (wt%), n=29; chondrule low-Ca pyroxene Fs_10.4±9.0Wo_2.5±3.1, n=7.

Classification: Ordinary chondrite (LL3.15), subtype 3.15 based on mean values of Fa and Fs and 1-sigma standard deviation, and on the ferroan olivine mean value of Cr₂O₃ and 1-sigma standard deviation (Grossman and Brearley, 2005).

Specimens: 22.5 g including a probe mount on deposit at UNM, Morten Bilet holds the main mass.

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016
Mass (g):	850
Pieces:	1
Class:	LL3.15
Shock stage:	S3
Weathering grade:	W2
Fayalite (mol%):	17.0±9.4
Ferrosilite (mol%):	10.4±9.0
Wollastonite (mol%):	2.5±3.1
Classifier:	C. Agee, UNM
Type spec mass (g):	22.5
Type spec location:	UNM
Main mass:	Morten Bilet
Comments:	Field name MB-1; submitted by C. Agee, UNM

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 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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