Meteoritical Bulletin: Entry for Northwest Africa 10304

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Northwest Africa 10304

Basic information

Name: Northwest Africa 10304
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10304
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 40 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 409 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 22 Oct 2015

Writeup

help

Writeup from MB 104:

Northwest Africa 10304 (NWA 10304)

(Northwest Africa)

Purchased: 2013 Apr

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Darryl Pitt in April 2013 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Composed mainly of debris derived from a gabbroic eucrite lithology (present as sparse lithic clasts) plus minor diogenitic orthopyroxene (associated with olivine). Major minerals are calcic plagioclase (polycrystalline), exsolved pigeonite (some exhibiting red-brown altered cores in thin section), silica polymorph, ilmenite and troilite.

Geochemistry: Diogenitic orthopyroxene (Fs_29.6Wo_2.3, FeO/MnO = 27), olivine (Fa_28.4-34.9, FeO/MnO = 50-51, N = 2), orthopyroxene host (Fs_59.3-59.5Wo_1.5-1.4, FeO/MnO = 29-30, N = 2), clinopyroxene exsolution lamellae (Fs_28.6-28.7Wo_41.3-41.5, FeO/MnO = 30-32, N = 2).

Classification: Eucrite (polymict breccia).

Specimens: 8.1 g including one polished thin section at UWB; main mass with DPitt.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2013 Apr
Mass (g):	40
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	high
Weathering grade:	moderate
Fayalite (mol%):	28.4-34.9
Ferrosilite (mol%):	29.6; 59.3; 28.6; 51.3; 20.1
Wollastonite (mol%):	2.3; 1.5; 41.3; 1.7; 44.2
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	8.1
Type spec location:	UWB
Main mass:	DPitt
Comments:	DP 737; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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