Meteoritical Bulletin: Entry for Northwest Africa 10328

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Northwest Africa 10328

Basic information

Name: Northwest Africa 10328
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10328
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 5.19 kg

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	L5-melt breccia
Recommended:			L5-melt breccia [explanation]

This is 1 of 42 approved meteorites classified as L5-melt breccia. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 21 May 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10328 (NWA 10328)

(Northwest Africa)

Find: 2015

Classification: Ordinary chondrite (L5, melt breccia)

History: Reportedly found in Morocco, 2015 and purchased by Dave Gheesling fom Rachid Chaoui in early 2015.

Physical characteristics: Single stone with weathered fusion-crusted exterior. A saw cut shows a breccia of ordinary chondrite clasts set in a matrix of dark, fine-grained material.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows many fragmental L5 clasts, bounded by fine cataclastic to recrystallized grains, and pervasive quenched melt throughout this brecciated sample. L5 clasts contain numerous distinct chondrules with plagioclase up to 20 μm. Metal and sulfide are concentrated as domains up to 2 mm, but also ubiquitous as finely disseminated grains ~1-5 μm.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa_25.5±0.5, Fe/Mn=51±3, n=6; low-Ca pyroxene Fs_21.7±0.2Wo_1.0±0.2, n=5; high-Ca pyroxene Fs_11.8Wo_32.6, n=1.

Classification: Ordinary chondrite (L5, melt breccia) fragmental, L5 chondrite clasts set in a recrystallized melt matrix.

Specimens: 23.2 g including a probe mount on deposit at UNM, Dave Gheesling holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	2015
Mass (g):	5190
Pieces:	1
Class:	L5-melt breccia
Shock stage:	S4
Weathering grade:	W1
Fayalite (mol%):	25.5±0.5
Ferrosilite (mol%):	21.7±0.2
Wollastonite (mol%):	1.0±0.2
Classifier:	C. Agee, UNM
Type spec mass (g):	23.2
Type spec location:	UNM
Main mass:	Dave Gheesling
Comments:	Fieldname DG-6; 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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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